Hugin 2020.0
* Fixes fast preview on HiDPI screens under GTK+3 and MacOS.
* Make fast preview screen zoomable with mouse wheel.
* Make hugin_hdrmerge aware of cropped intermediate images.
* Several improvements for command line tools (pto_var, pto_move, pto_gen, autooptimiser).
* More checks in GUI for strange user input.

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Hugin 2019.2
* Mainly a bug fix release.
* Fixes raw import on Mac OS.
* Fixes bugs in verdandi/internal blender.
* Scripting interface needs now Python3.
* Improvements for high dpi displays (Windows, GTK+3).

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Hugin 2019.0
* Added raw import: It converts the RAW images to TIFF using a raw converter.
  This can be done by dcraw (requires additional exiftool), RawTherapee or
  darktable. These programs needs to be installed externally.
* Fixes for align_image_stack with EXR images.
* Added option for range compression. Can be helpful for LDR panoramas to 
  brighten the shadows before merging, because at this stage the blender has 
  some more information which can be helpful.
* New hotkeys for mask editor (change zoom level with 0, 1 and 2).
* Expression parser (pto_var and "manipulate image variables" in GUI) can now read also
  all image variables.
* line_find: Ignore lines with low distance to each other to get better coverage.
  Also use only central part of the panorama for searching for line control points
  (ignoring zenit/nadir near areas).
* pano_modify: Added new switch --projection-parameter to set projection parameters.
* Store program settings according to XDG base dir specification (Linux only, needs to 
  compile with wxWidgets 3.1.1 or later).

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Hugin 2018.0
* Several improvements for optimizer tabs (mark deselected images, allow changing
  optimizer variables for all selected images at once, option to ignore line cp)
* hugin_stacker: New tool to stack overlapping images.
* Hugin: Added option to disable auto-rotation of images in control point and mask editor.
* Nona, verdandi and hugin_stacker can now write BigTIFF images (for files >4 GB).
* Added expression parser to GUI: This allows to manipulate several image variables at 
  once. (This is the same as running pto_var --set from the command line.)
* Add user-defined assistant and expose it in the GUI. It allows to set up different
  assistant strategies without the need to recompiling. Provide also some examples
  (scanned images, multi-row panoramas with orphaned images, single-shot panorama
  cameras).

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Hugin 2017.0
* Several fixes for working with HDR images (display in GUI, photometric optimizer,
  handling of under/over exposured pixels in merging code).
* Expose shipped user defined output sequences in GUI as own sub-menu.
* Added some more user defined output sequences (layered TIFF, cube faces) and
  added new placeholder %sourceimage% to user defined output sequence.
* Optimizer tabs uses now checkboxes instead of bold underlined font for marking
  of variables to be optimized.
* Use wxWidgets help windows instead of default browser (Linux&Mac only,
  this provides table of content, index and full text search in help files).
* Added special assistant variant for single image projects.
* Cpfind does not downscale images smaller than 2000 pixels.
* Fixes handling of masks in cpfind when images needs remapping for cp finding.
* Display of final panorama dimensions on stitcher tab.
* Sometimes unsaved changes were disregarded without asking the user (e.g. when loading 
  a project via the recently used projects list). Unsaved changes should now always 
  require user confirmation).

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Hugin 2016.2
* Allow reading of image positions from Papywizard XML files.
* Internal blender and verdandi got the possibility to blend seams as alternative to
  current hard seam.
* The display of the control point error (after optimizing and in fast preview window)
  and the control point list window can now limited to take only control points in active
  images into account (menu Edit>Optimize only active images, connected with the setting
  on the optimizer tab).
* Improvements to mask tab in Hugin (edit crop of all images of the same lens at once) and
  find panorama dialog in PTBatcherGUI (remove images from found panoramas, split found
  panorama into two).
* Several improvements for Mac OS.
* Fixes several issues with fast preview window which could result in random crashes
  (uninitialized variables, memory leaks).

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Hugin 2016.0
* Added user defined output. The user can define own output sequences to implement
  new use cases, e.g. zero noise output.
* Added --clip-exposure switch to nona to automatically mask over and under exposed
  areas in input images.
* Color management
   ** GUI tools (Hugin, calibrate_lens_gui) take ICC profiles in files and monitor 
      color profile into account to display images.
   ** celeste and cpfind converts internal image to sRGB before working.
* Some buttons got a context menu for easier access to some function
  ** Show all in fast preview window to allow better interaction with stacked projects
  ** Celeste in cp tab: the button can now create cp or clean cp  
* Updated internal levmar library to version 2.6
* The identify tool in the fast preview window shows now also the image numbers on top
  of the images. (This can be suppressed by pressing the alt button).
* Fixes internal image format for GPU remapping. This should fix the "unsupported
  framebufferformat" error.
* Use own code for OpenGL intialization. Now freeglut is not needed anymore.
  (This should prevent the appearing of window when running "nona -g". Linux/Window only)
* Control point and mask editor retain viewpoint when changing zoom factor.
* PTBatcherGUI: Minimize to tray is now user configurable.
* Fixes a bug in photometric optimizer and merge projects with line control points.

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Hugin 2015.0
* stability and speed improvements
* new stitching engine
* new blender verdandi
* own camera and lens database
* preview window: new tool to add or remove control points
* automatic exposure stack detection when loading images,
* fine-tune and auto-estimate functions are now projection aware
* PTBatcherGUI: more options for end of process
* PTBatcherGUI now shows the thumbnails when searching for images in directories.

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Hugin 2014.0
* inherit many of the libpano improvements (of version 2.9.19)
* the translation plane variables Tpy and Tpp have been added to the GUI 
  (better support for translation parameter, e.g. for nadir images, also pano with 
  translation parameters can now rotated)
* improvement of the GPU remapping code (bug fixes in the glue code, added some missing
  GPU transformation, now also fisheye lenses are supported by GPU code)
* better support for line control point in Control points tab (it still requires that 
  the same image is displayed left and right for full features, but also better support 
  for line control points above several images)
* obsolete programs matchpoint, nona_gui and PTBatcher have been removed
* outdated translation have been removed from the default install
* initialize the colour balance values during loading with EXIF values 
  (this information is only stored and decoded by some cameras 
  (mainly models by Panasonic, Pentax, Olympus, Nikon))
* improved the assistant
* allow customization of exiftool command used to copy metadata to output images
* new command line tools for CLI processing
    ** pto_mask: manipulate mask in project file
    ** pto_template: apply template to project file
    ** pto_move: move or copy project files with all associated images

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Hugin 2013.0
* Redesign of the User Interface: The User Interface now features a Simple, Advanced and
  Expert interface.
* New tools added:
   ** pto_var ( change image variables inside pto files)
   ** pto_lensstack (modify assigned lenses and stack in pto files)
   ** geocpset ( add geometric contraints for multirow panorama with featureless images)
* Completely rewritten internal helpfiles to reflect new User interface(s) and functionalities
* many bugfixes

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Hugin 2012.0
* Integration of lensfun library
* New tool in scripting: pto_gen
* Many bugfixes

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Hugin 2011.4
* Vertical feature detector for automatic levelling of panoramas
* Bugfix release

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Hugin 2011.2
* New Lens Calibrator. A tool to calibrate lens correction parameters on the basis of 
  reference shots containing straight lines.
* Hugin Scripting Interface (HSI). Access Hugin's functionality from Python
* Hugin Plugin Interface (HPI). Write Plugins in Python and run them within Hugin
* Hugin Batch Processor is the default GUI to control the stitching process, 
  replaces the primitive hugin_stitch_project

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Hugin 2011.0
* Main new feature: Overview in the Fast Preview (GSoC 2010 project).
* Improved cpfind for fisheye and wide angle images.
* New Gray Picker for color tuning.
* Extended functionality in align_image_stack for the alignment of stereo images.

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Hugin 2010.4
This is the first version of Hugin that can be considered feature-complete:
* Built-in patent-free control points generator
* Refactored Makefile library
* Improved unattended operation, interaction and functionality, reporting of stitching and 
  system information
* New command line tools cpfind and icpfind
* Many libraries and build improvements
* Migration of issue trackers from SourceForge to Launchpad
* New visual identity, reorganized for easier editing in the future

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Hugin 2010.2
* New layout mode
* New Masking tool
* New Mosaics stitching mode
* Linked bracketing
* Sophisticated control point detection modes
* Support for new lens types
* Codebase migrated from Subversion to Mercurial

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Hugin 2010.0
* Improved usability, particularly of the fast preview
* autocrop
* deghosting in the GUI

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Hugin 2009.4
* automatic lens calibration (research tool as basis for future development)
* control point cleaning
* plenty of incremental improvements

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Hugin 2009.2
* New naming scheme. Major version number is the year of release. 
  Minor version number is the counter of releases during the year. 
  Even minor numbers (starting with 0) are stable releases. 
  Odd minor numbers are development releases. 

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Hugin 0.8
Integrating of Goggle Sommer of Code 2008 results
* Fast Preview window: OpenGL accelerated preview window
* Celeste sky identification
* New panorama projections: Pannini, Biplane and Triplane, and Orthographic and Equisolid
* Batch Processor for stitching projects



