GraphicsMagick
GraphicsMagick
Contents
Image is the primary object in Magick++ and represents a single image frame (see image design). The STL interface must be used to operate on image sequences or images (e.g. of format GIF, TIFF, MIFF, Postscript, & MNG) which are comprized of multiple image frames. Individual frames of a multi-frame image may be requested by adding array-style notation to the end of the file name (e.g. "animation.gif[3]" retrieves the fourth frame of a GIF animation. Various image manipulation operations may be applied to the image. Attributes may be set on the image to influence the operation of the manipulation operations. The Pixels class provides low-level access to image pixels. As a convenience, including <Magick++.h> is sufficient in order to use the complete Magick++ API. The Magick++ API is enclosed within the Magick namespace so you must either add the prefix " Magick:: " to each class/enumeration name or add the statement " using namespace Magick;" after including the Magick++.h header.
The InitializeMagick() function MUST be invoked before constructing any Magick++ objects. This used to be optional, but now it is absolutely required. This function initalizes semaphores and configuration information necessary for the software to work correctly. Failing to invoke InitializeMagick() is likely to lead to a program crash or thrown assertion. If the program resides in the same directory as the GraphicsMagick files, then argv[0] may be passed as an argument so that GraphicsMagick knows where its files reside, otherwise NULL may be passed and GraphicsMagick will try to use other means (if necessary).
The preferred way to allocate Image objects is via automatic allocation (on the stack). There is no concern that allocating Image objects on the stack will excessively enlarge the stack since Magick++ allocates all large data objects (such as the actual image data) from the heap. Use of automatic allocation is preferred over explicit allocation (via new) since it is much less error prone and allows use of C++ scoping rules to avoid memory leaks. Use of automatic allocation allows Magick++ objects to be assigned and copied just like the C++ intrinsic data types (e.g. 'int '), leading to clear and easy to read code. Use of automatic allocation leads to naturally exception-safe code since if an exception is thrown, the object is automatically deallocated once the stack unwinds past the scope of the allocation (not the case for objects allocated via new ).
Image is very easy to use. For example, here is a the source to a program which reads an image, crops it, and writes it to a new file (the exception handling is optional but strongly recommended):
#include <Magick++.h>
#include <iostream>
using namespace std;
using namespace Magick;
int main(int argc,char **argv)
{
InitializeMagick(*argv);
// Construct the image object. Seperating image construction from the
// the read operation ensures that a failure to read the image file
// doesn't render the image object useless.
Image image;
try {
// Read a file into image object
image.read( "girl.gif" );
// Crop the image to specified size (width, height, xOffset, yOffset)
image.crop( Geometry(100,100, 100, 100) );
// Write the image to a file
image.write( "x.gif" );
}
catch( Exception &error_ )
{
cout << "Caught exception: " << error_.what() << endl;
return 1;
}
return 0;
}
The following is the source to a program which illustrates the use of Magick++'s efficient reference-counted assignment and copy-constructor operations which minimize use of memory and eliminate unncessary copy operations (allowing Image objects to be efficiently assigned, and copied into containers). The program accomplishes the following:
#include <Magick++.h>
#include <iostream>
using namespace std;
using namespace Magick;
int main(int argc,char **argv)
{
InitializeMagick(*argv);
Image master("horse.jpg");
Image second = master;
second.zoom("640x480");
Image third = master;
third.zoom("800x600");
second.write("horse640x480.jpg");
third.write("horse800x600.jpg");
return 0;
}
During the entire operation, a maximum of three images exist in memory and the image data is never copied.
The following is the source for another simple program which creates a 100 by 100 pixel white image with a red pixel in the center and writes it to a file:
#include <Magick++.h>
using namespace std;
using namespace Magick;
int main(int argc,char **argv)
{
InitializeMagick(*argv);
Image image( "100x100", "white" );
image.pixelColor( 49, 49, "red" );
image.write( "red_pixel.png" );
return 0;
}
If you wanted to change the color image to grayscale, you could add the lines:
image.quantizeColorSpace( GRAYColorspace ); image.quantizeColors( 256 ); image.quantize( );
or, more simply:
image.type( GrayscaleType );
prior to writing the image.
While encoded images (e.g. JPEG) are most often written-to and read-from a disk file, encoded images may also reside in memory. Encoded images in memory are known as BLOBs (Binary Large OBjects) and may be represented using the Blob class. The encoded image may be initially placed in memory by reading it directly from a file, reading the image from a database, memory-mapped from a disk file, or could be written to memory by Magick++. Once the encoded image has been placed within a Blob, it may be read into a Magick++ Image via a constructor or read() . Likewise, a Magick++ image may be written to a Blob via write().
An example of using Image to write to a Blob follows:
#include <Magick++.h>
using namespace std;
using namespace Magick;
int main(int argc,char **argv)
{
// Read GIF file from disk
Image image( "giraffe.gif" );
// Write to BLOB in JPEG format
Blob blob;
image.magick( "JPEG" ) // Set JPEG output format
image.write( &blob );
[ Use BLOB data (in JPEG format) here ]
return 0;
}
likewise, to read an image from a Blob, you could use one of the following examples:
[ Entry condition for the following examples is that data is pointer to encoded image data and length represents the size of the data ]
Blob blob( data, length ); Image image( blob );
or
Blob blob( data, length ); Image image; image.read( blob);
Some images do not contain their size or format so the size and format must be specified in advance:
Blob blob( data, length ); Image image; image.size( "640x480") image.magick( "RGBA" ); image.read( blob);
An Image may be constructed in a number of ways. It may be constructed from a file, a URL, or an encoded image (e.g. JPEG) contained in an in-memory Blob . The following Image constructors and assignment operators are available:
Construct from image file or image specification:
Image( const std::string &imageSpec_ )
Construct a blank image canvas of specified size and color:
Image( const Geometry &size_, const Color &color_ )
Construct Image from in-memory Blob:
Image ( const Blob &blob_ )
Construct Image of specified size from in-memory Blob:
Image ( const Blob &blob_, const Geometry &size_ )
Construct Image of specified size and depth from in-memory Blob:
Image ( const Blob &blob_, const Geometry &size,
const unsigned int depth )
Construct Image of specified size, depth, and format from in-memory Blob:
Image ( const Blob &blob_, const Geometry &size,
const unsigned int depth_,
const std::string &magick_ )
Construct Image of specified size, and format from in-memory Blob:
Image ( const Blob &blob_, const Geometry &size,
const std::string &magick_ )
Construct an image based on an array of raw pixels, of specified type and mapping, in memory:
Image ( const unsigned int width_,
const unsigned int height_,
const std::string &map_,
const StorageType type_,
const void *pixels_ )
Default constructor:
Image( void )
Copy constructor:
Image ( const Image & image_ )
Assignment operator:
Image& operator= ( const Image &image_ )
Ping is similar to read except only enough of the image is read to determine the image columns, rows, and filesize. Access the columns(), rows(), and fileSize() attributes after invoking ping. The image pixels are not valid after calling ping:
void ping ( const std::string &imageSpec_ )
Ping is similar to read except only enough of the image is read to determine the image columns, rows, and filesize. Access the columns(), rows(), and fileSize() attributes after invoking ping. The image pixels are not valid after calling ping:
void ping ( const Blob &blob_ )
Read single image frame into current object. Use ping instead if you want to obtain the basic attributes of the image without reading the whole file/blob:
void read ( const std::string &imageSpec_ )
Read single image frame of specified size into current object:
void read ( const Geometry &size_,
const std::string &imageSpec_ )
Read single image frame from in-memory Blob:
void read ( const Blob &blob_ )
Read single image frame of specified size from in-memory Blob:
void read ( const Blob &blob_,
const Geometry &size_ )
Read single image frame of specified size and depth from in-memory Blob:
void read ( const Blob &blob_,
const Geometry &size_,
const unsigned int depth_ )
Read single image frame of specified size, depth, and format from in-memory Blob:
void read ( const Blob &blob_,
const Geometry &size_,
const unsigned int depth_,
const std::string &magick_ )
Read single image frame of specified size, and format from in-memory Blob:
void read ( const Blob &blob_,
const Geometry &size_,
const std::string &magick_ )
Read single image frame from an array of raw pixels, with specified storage type (ConstituteImage), e.g. image.read( 640, 480, "RGB", 0, pixels ):
void read ( const unsigned int width_,
const unsigned int height_,
const std::string &map_,
const StorageType type_,
const void *pixels_ )
Write single image frame to a file:
void write ( const std::string &imageSpec_ )
Write single image frame to in-memory Blob, with optional format and adjoin parameters:
void write ( Blob *blob_ )
void write ( Blob *blob_,
const std::string &magick_ )
void write ( Blob *blob_,
const std::string &magick_,
const unsigned int depth_ )
Write single image frame to an array of pixels with storage type specified by user (DispatchImage), e.g. image.write( 0, 0, 640, 1, "RGB", 0, pixels ):
void write ( const int x_,
const int y_,
const unsigned int columns_,
const unsigned int rows_,
const std::string& map_,
const StorageType type_,
void *pixels_ )
Image supports access to all the single-image (versus image-list) manipulation operations provided by the GraphicsMagick library. If you must process a multi-image file (such as an animation), the STL interface , which provides a multi-image abstraction on top of Image, must be used.
Image manipulation methods are very easy to use. For example:
Image image;
image.read("myImage.tiff");
image.addNoise(GaussianNoise);
image.write("myImage.tiff");
adds gaussian noise to the image file "myImage.tiff".
The following image manipulation methods are available:
Apply adaptive thresholding to the image (see http://homepages.inf.ed.ac.uk/rbf/HIPR2/adpthrsh.htm). Adaptive thresholding is useful if the ideal threshold level is not known in advance, or if the illumination gradient is not constant across the image. Adaptive thresholding works by evaulating the mean (average) of a pixel region (size specified by width and height) and using the mean as the thresholding value. In order to remove residual noise from the background, the threshold may be adjusted by subtracting a constant offset (default zero) from the mean to compute the threshold:
void adaptiveThreshold ( const unsigned int width,
const unsigned int height,
const unsigned offset = 0 )
Add noise to image with the specified noise type:
void addNoise ( const NoiseType noiseType_ )
Add noise to an image channel with the specified noise type. The channel parameter specifies the channel to add noise to. The noiseType parameter specifies the type of noise:
void addNoiseChannel ( const ChannelType channel_,
const NoiseType noiseType_)
Transform image by specified affine (or free transform) matrix:
void affineTransform ( const DrawableAffine &affine )
Annotate image (draw text on image)
Gravity effects text placement in bounding area according to these rules:
Annotate using specified text, and placement location:
void annotate ( const std::string &text_,
const Geometry &location_ )
Annotate using specified text, bounding area, and placement gravity:
void annotate ( const std::string &text_,
const Geometry &boundingArea_,
const GravityType gravity_ )
Annotate with text using specified text, bounding area, placement gravity, and rotation:
void annotate ( const std::string &text_,
const Geometry &boundingArea_,
const GravityType gravity_,
const double degrees_ )
Annotate with text (bounding area is entire image) and placement gravity:
void annotate ( const std::string &text_,
const GravityType gravity_ )
Blur an image with the specified blur factor.
The radius parameter specifies the radius of the Gaussian, in pixels, not counting the center pixel. The sigma parameter specifies the standard deviation of the Laplacian, in pixels:
void blur ( const double radius_ = 0.0,
const double sigma_ = 1.0 )
Blur an image channel with the specified blur factor.
The channel parameter specifies the channel to modify. The radius parameter specifies the radius of the Gaussian, in pixels, not counting the center pixel. The sigma parameter specifies the standard deviation of the Laplacian, in pixels:
void blurChannel ( const ChannelType channel_,
const double radius_ = 0.0,
const double sigma_ = 1.0 )
Border image (add border to image). The color of the border is specified by the borderColor attribute:
void border ( const Geometry &geometry_
= borderGeometryDefault )
Bake in the ASC-CDL, which is a convention for the for the exchange of basic primary color grading information between for the exchange of basic primary color grading information between equipment and software from different manufacturers. It is a useful transform for other purposes as well:
void cdl ( const std::string &cdl_ )
See CdlImage for more details on the ASC-CDL.
Extract channel from image. Use this option to extract a particular channel from the image. MatteChannel for example, is useful for extracting the opacity values from an image:
void channel ( const ChannelType channel_ )
Set or obtain modulus channel depth:
void channelDepth ( const ChannelType channel_,
const unsigned int depth_ )
unsigned int channelDepth ( const ChannelType channel_ )
Charcoal effect image (looks like charcoal sketch).
The radius parameter specifies the radius of the Gaussian, in pixels, not counting the center pixel. The sigma parameter specifies the standard deviation of the Laplacian, in pixels:
void charcoal ( const double radius_ = 0.0,
const double sigma_ = 1.0 )
Chop image (remove vertical or horizontal subregion of image):
void chop ( const Geometry &geometry_ )
Colorize image with pen color, using specified percent opacity for red, green, and blue quantums:
void colorize ( const unsigned int opacityRed_,
const unsigned int opacityGreen_,
const unsigned int opacityBlue_,
const Color &penColor_ )
Colorize image with pen color, using specified percent opacity:
void colorize ( const unsigned int opacity_,
const Color &penColor_ )
Apply a color matrix to the image channels. The user supplied matrix may be of order 1 to 5 (1x1 through 5x5):
void colorMatrix (const unsigned int order_,
const double *color_matrix_)
See ColorMatrixImage for more details.
Comment image (add comment string to image). By default, each image is commented with its file name. Use this method to assign a specific comment to the image. Optionally you can include the image filename, type, width, height, or other image attributes by embedding special format characters:
void comment ( const std::string &comment_ )
Compare current image with another image. Sets meanErrorPerPixel, normalizedMaxError, and normalizedMeanError in the current image. False is returned if the images are identical. An ErrorOption exception is thrown if the reference image columns, rows, colorspace, or matte differ from the current image:
bool compare ( const Image &reference_ )
Compose an image onto another at specified x and y offset and using a specified algorithm:
void composite ( const Image &compositeImage_,
const int xOffset_,
const int yOffset_,
const CompositeOperator compose_
= InCompositeOp )
void composite ( const Image &compositeImage_,
const Geometry &offset_,
const CompositeOperator compose_
= InCompositeOp )
void composite ( const Image &compositeImage_,
const GravityType gravity_,
const CompositeOperator compose_
= InCompositeOp )
Contrast image (enhance intensity differences in image):
void contrast ( const unsigned int sharpen_ )
Convolve image. Applies a user-specified convolution to the image. The order parameter represents the number of columns and rows in the filter kernel while kernel is a two-dimensional array of doubles representing the convolution kernel to apply:
void convolve ( const unsigned int order_,
const double *kernel_ )
Display image on screen. Caution: if an image format is is not compatible with the display visual (e.g. JPEG on a colormapped display) then the original image will be altered. Use a copy of the original if this is a problem:
void display ( void )
Draw shape or text on image using a single drawable object:
void draw ( const Drawable &drawable_ );
Draw shapes or text on image using a set of Drawable objects contained in an STL list. Use of this method improves drawing performance and allows batching draw objects together in a list for repeated use:
void draw ( const std::list<Magick::Drawable> &drawable_ );
Edge image (hilight edges in image). The radius is the radius of the pixel neighborhood.. Specify a radius of zero for automatic radius selection:
void edge ( const double radius_ = 0.0 )
Emboss image (hilight edges with 3D effect). The radius parameter specifies the radius of the Gaussian, in pixels, not counting the center pixel. The sigma parameter specifies the standard deviation of the Laplacian, in pixels:
void emboss ( const double radius_ = 0.0,
const double sigma_ = 1.0)
Flood-fill color across pixels that match the color of the target pixel and are neighbors of the target pixel. Uses current fuzz setting when determining color match:
void floodFillColor( const unsigned int x_,
const unsigned int y_,
const Color &fillColor_ )
void floodFillColor( const Geometry &point_,
const Color &fillColor_ )
Flood-fill color across pixels starting at target-pixel and stopping at pixels matching specified border color. Uses current fuzz setting when determining color match:
void floodFillColor( const unsigned int x_,
const unsigned int y_,
const Color &fillColor_,
const Color &borderColor_ )
void floodFillColor( const Geometry &point_,
const Color &fillColor_,
const Color &borderColor_ )
Flood-fill pixels matching color (within fuzz factor) of target pixel(x,y) with replacement opacity value using method:
void floodFillOpacity ( const unsigned int x_,
const unsigned int y_,
const unsigned int opacity_,
const PaintMethod method_ )
Flood-fill texture across pixels that match the color of the target pixel and are neighbors of the target pixel. Uses current fuzz setting when determining color match:
void floodFillTexture( const unsigned int x_,
const unsigned int y_,
const Image &texture_ )
void floodFillTexture( const Geometry &point_,
const Image &texture_ )
Flood-fill texture across pixels starting at target-pixel and stopping at pixels matching specified border color. Uses current fuzz setting when determining color match:
void floodFillTexture( const unsigned int x_,
const unsigned int y_,
const Image &texture_,
const Color &borderColor_ )
void floodFillTexture( const Geometry &point_,
const Image &texture_,
const Color &borderColor_ )
Draw a decorative frame around the image:
void frame ( const Geometry &geometry_ = frameGeometryDefault )
void frame ( const unsigned int width_,
const unsigned int height_,
const int innerBevel_ = 6,
const int outerBevel_ = 6 )
Gamma correct the image or individual image channels:
void gamma ( const double gamma_ )
void gamma ( const double gammaRed_,
const double gammaGreen_,
const double gammaBlue_ )
Gaussian blur image. The number of neighbor pixels to be included in the convolution mask is specified by width. The standard deviation of the gaussian bell curve is specified by sigma:
void gaussianBlur ( const double width_, const double sigma_ )
Gaussian blur image channel. The number of neighbor pixels to be included in the convolution mask is specified by width. The standard deviation of the gaussian bell curve is specified by sigma:
void gaussianBlurChannel ( const ChannelType channel_,
const double width_,
const double sigma_ )
Apply a color lookup table (Hald CLUT) to the image:
void haldClut ( const Image &clutImage_ )
See HaldClutImage for more details.
Assign a label to an image. Use this option to assign a specific label to the image. Optionally you can include the image filename, type, width, height, or scene number in the label by embedding special format characters. If the first character of string is @, the image label is read from a file titled by the remaining characters in the string. When converting to Postscript, use this option to specify a header string to print above the image:
void label ( const std::string &label_ )
Level image to increase image contrast, and/or adjust image gamma. Adjust the levels of the image by scaling the colors falling between specified white and black points to the full available quantum range. The parameters provided represent the black, mid (gamma), and white points. The black point specifies the darkest color in the image. Colors darker than the black point are set to zero. Mid point (gamma) specifies a gamma correction to apply to the image. White point specifies the lightest color in the image. Colors brighter than the white point are set to the maximum quantum value. The black and white point have the valid range 0 to MaxRGB while mid (gamma) has a useful range of 0 to ten:
void level ( const double black_point,
const double white_point,
const double mid_point=1.0 )
Level image channel to increase image contrast, and/or adjust image gamma. Adjust the levels of the image channel by scaling the colors falling between specified white and black points to the full available quantum range. The parameters provided represent the black, mid (gamma), and white points. The black point specifies the darkest color in the image. Colors darker than the black point are set to zero. Mid point (gamma) specifies a gamma correction to apply to the image. White point specifies the lightest color in the image. Colors brighter than the white point are set to the maximum quantum value. The black and white point have the valid range 0 to MaxRGB while mid (gamma) has a useful range of 0 to ten:
void levelChannel ( const ChannelType channel,
const double black_point,
const double white_point,
const double mid_point=1.0 )
Remap image colors with closest color from a reference image. Set dither to true in to apply Floyd/Steinberg error diffusion to the image. By default, color reduction chooses an optimal set of colors that best represent the original image. Alternatively, you can choose a particular set of colors from an image file with this option:
void map ( const Image &mapImage_ ,
const bool dither_ = false )
Floodfill designated area with a replacement opacity value:
void matteFloodfill ( const Color &target_ ,
const unsigned int opacity_,
const int x_, const int y_,
const PaintMethod method_ )
Filter image by replacing each pixel component with the median color in a circular neighborhood:
void medianFilter ( const double radius_ = 0.0 )
Prepare to update image (copy if reference > 1). Normally Magick++'s implicit reference counting takes care of all instance management. In the rare case that the automatic instance management does not work, use this method to assure that there is only one reference to the image to be modified. It should be used in the cases where a GraphicsMagick C function is used directly on an image which may have multiple references:
void modifyImage ( void )
Modulate percent hue, saturation, and brightness of an image. Modulation of saturation and brightness is as a ratio of the current value (1.0 for no change). Modulation of hue is an absolute rotation of -180 degrees to +180 degrees from the current position corresponding to an argument range of 0 to 2.0 (1.0 for no change):
void modulate ( const double brightness_,
const double saturation_,
const double hue_ )
Motion blur image with specified blur factor. The radius parameter specifies the radius of the Gaussian, in pixels, not counting the center pixel. The sigma parameter specifies the standard deviation of the Laplacian, in pixels. The angle parameter specifies the angle the object appears to be comming from (zero degrees is from the right):
void motionBlur ( const double radius_,
const double sigma_,
const double angle_ )
Negate colors in image. Set grayscale to only negate grayscale values in image:
void negate ( const bool grayscale_ = false )
Normalize image (increase contrast by normalizing the pixel values to span the full range of color values):
void normalize ( void )
Oilpaint image (image looks like an oil painting):
void oilPaint ( const double radius_ = 3.0 )
Set or attenuate the opacity channel in the image. If the image pixels are opaque then they are set to the specified opacity value, otherwise they are blended with the supplied opacity value. The value of opacity ranges from 0 (completely opaque) to MaxRGB. The defines OpaqueOpacity and TransparentOpacity are available to specify completely opaque or completely transparent, respectively:
void opacity ( const unsigned int opacity_ )
Change color of specified opaque pixel to specified pen color:
void opaque ( const Color &opaqueColor_,
const Color &penColor_ )
Quantize image (reduce number of colors). Set measureError to true in order to calculate error attributes:
void quantize ( const bool measureError_ = false )
Apply an arithmetic or bitwise operator to the image pixel quantums:
void quantumOperator ( const ChannelType channel_,
const QuantumOperator operator_,
double rvalue_)
void quantumOperator ( const int x_,const int y_,
const unsigned int columns_,
const unsigned int rows_,
const ChannelType channel_,
const QuantumOperator operator_,
const double rvalue_)
Execute a named process module using an argc/argv syntax similar to that accepted by a C 'main' routine. An exception is thrown if the requested process module doesn't exist, fails to load, or fails during execution:
void process ( std::string name_,
const int argc_,
char **argv_ )
Raise image (lighten or darken the edges of an image to give a 3-D raised or lowered effect):
void raise ( const Geometry &geometry_ = "6x6+0+0",
const bool raisedFlag_ = false )
Random threshold image.
Changes the value of individual pixels based on the intensity of each pixel compared to a random threshold. The result is a low-contrast, two color image. The thresholds argument is a geometry containing LOWxHIGH thresholds. If the string contains 2x2, 3x3, or 4x4, then an ordered dither of order 2, 3, or 4 will be performed instead. If a channel argument is specified then only the specified channel is altered. This is a very fast alternative to 'quantize' based dithering:
void randomThreshold( const Geometry &thresholds_ )
Random threshold image channel.
Changes the value of individual pixels based on the intensity of each pixel compared to a random threshold. The result is a low-contrast, two color image. The thresholds argument is a geometry containing LOWxHIGH thresholds. If the string contains 2x2, 3x3, or 4x4, then an ordered dither of order 2, 3, or 4 will be performed instead. If a channel argument is specified then only the specified channel is altered. This is a very fast alternative to 'quantize' based dithering:
void randomThresholdChannel( const Geometry &thresholds_,
const ChannelType channel_ )
Reduce noise in image using a noise peak elimination filter:
void reduceNoise ( void ) void reduceNoise ( const double order_ )
Roll image (rolls image vertically and horizontally) by specified number of columnms and rows):
void roll ( const Geometry &roll_ )
void roll ( const unsigned int columns_,
const unsigned int rows_ )
Rotate image counter-clockwise by specified number of degrees:
void rotate ( const double degrees_ )
Resize image by using simple ratio algorithm which provides good quality:
void scale ( const Geometry &geometry_ )
Segment (coalesce similar image components) by analyzing the histograms of the color components and identifying units that are homogeneous with the fuzzy c-means technique. A histogram is built for the image. This histogram is filtered to reduce noise and a second derivative of the histogram plot is built and used to identify potential cluster colors (peaks in the histogram). The cluster colors are then validated by scanning through all of the pixels to see how many pixels fall within each cluster. Some candidate cluster colors may not match any of the image pixels at all and should be discarded. Specify clusterThreshold, as the number of pixels matching a cluster color in order for the cluster to be considered valid. SmoothingThreshold eliminates noise in the second derivative of the histogram. As the value is increased, you can expect a smoother second derivative. The default is 1.5:
void segment ( const double clusterThreshold_ = 1.0,
const double smoothingThreshold_ = 1.5 )
Shade image using distant light source. Specify azimuth and elevation as the position of the light source. By default, the shading results as a grayscale image.. Set colorShading to true to shade the red, green, and blue components of the image:
void shade ( const double azimuth_ = 30,
const double elevation_ = 30,
const bool colorShading_ = false )
Sharpen pixels in image. The radius parameter specifies the radius of the Gaussian, in pixels, not counting the center pixel. The sigma parameter specifies the standard deviation of the Laplacian, in pixels:
void sharpen ( const double radius_ = 0.0,
const double sigma_ = 1.0 )
Sharpen pixels in image channel. The radius parameter specifies the radius of the Gaussian, in pixels, not counting the center pixel. The sigma parameter specifies the standard deviation of the Laplacian, in pixels:
void sharpenChannel ( const ChannelType channel_,
const double radius_ = 0.0,
const double sigma_ = 1.0 )
Shear image (create parallelogram by sliding image by X or Y axis). Shearing slides one edge of an image along the X or Y axis, creating a parallelogram. An X direction shear slides an edge along the X axis, while a Y direction shear slides an edge along the Y axis. The amount of the shear is controlled by a shear angle. For X direction shears, x degrees is measured relative to the Y axis, and similarly, for Y direction shears y degrees is measured relative to the X axis. Empty triangles left over from shearing the image are filled with the color defined as borderColor:
void shear ( const double xShearAngle_,
const double yShearAngle_ )
Solarize image (similar to effect seen when exposing a photographic film to light during the development process):
void solarize ( const double factor_ = 50.0 )
Spread pixels randomly within image by specified ammount:
void spread ( const unsigned int amount_ = 3 )
Add a digital watermark to the image (based on second image):
void stegano ( const Image &watermark_ )
Create an image which appears in stereo when viewed with red-blue glasses (Red image on left, blue on right):
void stereo ( const Image &rightImage_ )
Channel a texture on pixels matching image background color:
void texture ( const Image &texture_ )
Threshold image channels (below threshold becomes black, above threshold becomes white). The range of the threshold parameter is 0 to MaxRGB:
void threshold ( const double threshold_ )
Transform image based on image and crop geometries. Crop geometry is optional:
void transform ( const Geometry &imageGeometry_ )
void transform ( const Geometry &imageGeometry_,
const Geometry &cropGeometry_ )
Add matte channel to image, setting pixels matching color to transparent:
void transparent ( const Color &color_ )
Convert the image representation to the specified type or retrieve the current image type. If the image is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to 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mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to an inferior type, then image information mayegmege is reduced to 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