fotoxx change log
=================

2009.09.22  v.8.4.3
+ Bugfix: crash in unbend function.

2009.09.18  v.8.4.2
+ French translation update.
+ Changes in make and man page for debian conformance.
+ Select area outline made easier to see (gray background).
+ Bugfix (zfuncs): crash if mouse select from empty image gallery.

2009.09.14  v.8.4.1
+ GUI: Italian translation was added.
+ Some missing translation calls were fixed.
+ Trim: faster and better user interface.

2009.09.12  v.8.4
+ Slide Show: add auto interval in addition to KB control.
+ Change cursor to clock icon during long computations
  (improve user feedback, especially for slow notebooks).
+ Trim: darken margins to remove for better visibility.
+ Trim: allow fixed aspect ratio and change margins accordingly.
+ Index tags and thumbnails: now works incrementally (much faster).
+ Bugfix: axis-lines were not erased after unbend function.
+ Bugfix: Save-as file was not added to recent files list.

2009.09.01  v.8.3
+ Improved select area interface: adjust edges of polygon anywhere.
+ Overlay lines and ellipses are easier to see (reversed colors).
+ Implemented both [save] and [save as]: [save] updates original file
    with no questions asked. [save as] is the usual cautious dialog.
+ New KB shortcuts: Ctrl+s: save  Ctrl+S: save as  Ctrl+q: quit.
+ Improved logic for detecting unsaved changes (fewer user queries).
+ Pixel edit: visible brush outline should help speed and precision.
+ HDF: visible brush outline should help speed and precision.
+ Rotate: [undo trim] button added.
+ Bugfix: rotating an image with the L/R keys and then editing would
    sometimes result in image distortion (changed width/height ratio).
+ Bugfix: edit tags + file save lost the tag updates.
+ Bugfix: rotate trim was being lost when dialog exited.
+ Bugfix: better recovery if pixel edit undo memory limit is reached.

2009.08.26  v.8.2.2
+ Bugfix: rotate +90, +1, trim (all in same dialog) caused a crash.

2009.08.24  v.8.2.1
+ Bugfix: temp file left in /home/user/.fotoxx/

2009.08.24  v.8.2
+ Save recent files list across sessions and improve user interface.
+ Defog function added - reduce fog/haze in target image areas.

2009.08.18  v.8.1
+ Bugfix: saving a file to itself (same file) caused loss of EXIF data.
+ Bugfix: use of zoom+ would sometimes display a smaller image.
+ Corrected location of man page for install in user-owned directory.
+ Improved pano auto-search for lens parameters.
+ Tag edit: dating a series of images was made easier: [use last] button.
+ Tag edit: allow date approximations, e.g. 2009 or 2009.08.
+ New convenience function: open file from list of 40 recent files.
+ Make install: create menu entry unconditionally (make launcher removed).
+ Make clean added, equivalent to make uninstall.
+ The Chinese and French translations were updated.

2009.08.03  v.8.0
+ Standard man page added (thin, with reference to user guide).
+ Licence changed from GPL v2 to GPL v3
+ Warp Image algorithm improved - should be easier to get desired shapes.
+ New function: High Depth of Field (HDF): combine photos with near and 
  far focus into a composite image with both near and far objects in 
  focus (experimantal: basically works but needs improvement).

2009.07.27  v.7.8
+ Pixel edit function was upgraded: 
   + suspend/resume to free mouse for zoom or scroll.
   + [undo last] button - remove error and continue editing.
   + more flexible brush transparency controls for paint and erase.
+ Catch segment fault, do traceback in popup window (even if GTK hosed). 
+ Change math to avoid overflow and segfault for images >40 megapixels.

2009.07.27  v.7.7.1
+ Bug fix in panorama and HDR (can cause looping).

2009.07.22  v.7.7
+ Trim function - slow dotted line drag was fixed.
+ Following functions now use parallel threads for multi-core CPUs: 
  sharpen (unsharp mask, laplacian), denoise (all 3 methods), unbend.
+ Pano and HDR have small speed improvements (28 and 14 percent).
+ Bugfix: view EXIF was broken for non-English locale.
+ Updated French translation.

2009.07.19  v.7.6
+ Updated Chinese translation.
+ Added initial Czech translation.
+ The select area function was made easier to use. This function can 
  now be suspended and resumed using a button. This frees the mouse 
  for zooming or scrolling the image during the area selection process. 
  Another button was added to show or hide the area outline while image 
  edit functions are being applied to the area.

2009.07.13  v.7.5
+ Avoid application lockup if drawing window shrunk to zero size.
+ Zoom+ button: retain current image center (feature lost in 7.4).
+ Scroll via mouse drag: reduce required mouse movement.
+ Select area: editing may be suspended and resumed later, with 
  other functions done in-between (see user guide for details).
+ Pixel edit: allow edit with large radius also at edge of image.
+ Pano prealign: do not load CPU when nothing is being done.
+ Pano auto-find lens parameters: more robust and consistent.
+ HDR and pano: avoid use of edge pixels for image alignment.
+ Fix half-broken tag search for images with no tags or dates.

2009.07.07  v.7.4.2
+ bugfix: view brightness distribution crash

2009.07.01  v.7.4 and 7.4.1
+ A longstanding performance problem has been improved. Scrolling around
  in a large image that is zoomed to full size was quite slow. This is
  now about 4x faster. There are no scroll bars - scroll by dragging the 
  mouse across the window ("virtual" scroll bars). Old method: make a
  Gtk Layout in a Gtk Scrolled Window containing the full size zoomed 
  image. New method: copy and scale the viewable area from the full-size
  image in memory into the main/drawing window.
+ EXIF data: view basic data (short output) and all data (long output)
+ 7.4.1 fixes an error in select area line drawing

2009.06.27  v.7.3
+ The "simulate painting" function was extended. It can now work within
  an outlined area like other edit functions. Another user control was
  added: minimum color match required to consolidate smaller patches 
  of color into larger ones.
+ File drag-drop was implemented: drag a file (e.g. from Nautilus) to
  a fotoxx window or desktop launcher - file will open in fotoxx.
  You can also make a file list in gedit and drag entries to fotoxx.
+ bugfix: exif keys with null data could cause spurious data
  (some RAW files observed with UserComment = null)

2009.06.24  v.7.2.1
+ GOFUNC was replaced with normal functions. GOFUNC caused compiler 
  optimization errors that are hard to find and eliminate.
+ minor bug fix in sharpen (edge detection method)
+ minor bug fix in image save - keep current image index if saved
  file goes into some other directory
+ updated French translation

2009.06.20  v.7.2
+ new function: select random images from thumbnail index, burn to CD/DVD
  (the program Brasero is used for the actual burning).

2009.06.16  v.7.1.2
Code change to fix the GCC 4.4 problem triggered optimization errors 
in GCC 4.3. This is a fix which works for both.

2009.06.16  v.7.1.1
The "Arch Linux" problem turned out to be a GCC 4.4 problem.
This build relabels that one and corrects two other GCC problems.

2009.06.15  v.7.1
+ restrict number of working threads to actual CPU (core) count
+ process multiple RAW files specified with wildcard template (e.g. *.RAW)
+ work-around for Arch Linux language issue
+ French translation update

2009.06.11  v.7.0
+ new function: simulated painting
+ new function: create desktop icon/launcher
+ the very long edit menu was divided into 6 menus
+ new help menu entry: show fotoxx internet home page
+ escape key can be used to exit show RGB mode
+ color depth: scale-up truncated brightness range to full range
+ color depth: round color value up if truncated part > 0.5
+ bugfix: search tags: find images with no tags did not work

2009.06.02  v.6.9.3
+ translation updates for French, Spanish, and Galician

2009.05.22  v.6.9.2
+ bugfix: generate tags & thumbnail index failed if input directory 
  contained a blank.

2009.05.19  v.6.9.1
+ diagnostic message in popup window if exiftool or ufraw is missing

2009.05.18  v.6.9
+ simulated embossing also in color - creates a 3D look.
+ bugfix: crash with unusual red-eye case.

2009.05.14  v.6.8
+ More powerful image "tune" function: adjustment of color intensity, 
  saturation, and RGB balance can optionally depend on pixel brightness
  (e.g. increase saturation for darker image areas more than brighter).
+ new function "tiles" - transform image or area into tiles (pixelate).
+ improved paint function user interface.
+ bugfix: edit of auto-uprighted image: un-rotate before edit.
+ bugfix: crash if "redo" button pressed in rapid succession.
+ bugfix: memory leak from multiple edits on one image

2009.05.08  v.6.7.3
+ Updated translations for Spanish and Galician.

2009.05.07  v.6.7.2
+ Use GdkPixbuf for saving jpeg files instead of libfreeimage. This gives 
  better results and allows quality 1-100 instead of good/better/best.

2009.05.05  v.6.7.1
+ keep the same extension when an edited image file is saved, as long
  as it fits with the saved file type. Accepted extensions for jpeg:
  .jpg .JPG .jpeg .JPEG   and for tiff: .tif .TIF .tiff .TIFF.
+ change package naming scheme to fotoxx-N.N-i686.deb

2009.05.03  v.6.7
+ new function: make simulated drawing from photo image
+ new function: make simulated embossing of photo image
+ new function: paint - edit pixels and draw lines
+ bugfix: show RGB was inaccurate in some cases

2009.04.28  v.6.6.1
+ handle images with 1 or 8 bits/pixel (black & white drawings)

2009.04.27  v.6.6
+ search images using wildcard path*/file* in addition to tags
+ search images by tags: tags may have wildcards
+ bugfix: stop crash if long-running function canceled more than once
+ bugfix: save image as TIFF-48 bits/pixel was producing TIFF-24.
+ image search dates: default missing from/to date to year 0/9999
+ look for and delete orphaned undo-stack files

2009.04.23  v.6.5
+ ufraw command syntax changed, fotoxx now tries both methods
+ dependencies.sh changed to tolerates more Linux chaos ("choice")
+ bugfix: undo stack corruption when running 2+ fotoxx instances
+ internal code cleanup - image bitmaps are now struct RGB

2009.04.07  v.6.4.3
+ edit < 24 bits/pixel: message: save as jpeg or tiff to edit
+ bugfix: segfault: attempt to edit file with no extension

2009.04.04  v.6.4.2
+ bugfix: unable to edit non-jpeg file with alpha channel

2009.04.03  v.6.4.1
+ intercept segment faults and show which image file has the problem
  (possible malformed metadata causing FreeImage to crash)
+ bugfix: panoramas of very small images could not pre-align
+ some speedup of sequential image viewing (slide show "next" key)

2009.04.01  v.6.4
+ scrollbars are "virtual" - scroll by dragging mouse across image
+ directory mods from outside fotoxx are detected and file list updated
+ edit menu is segmented into groups without using sub-menus
+ blur function made much faster for multi-core processors
+ bugfix: pano color shift for images with big brightness difference
+ bugfix: show RGB function not working within some edit functions

2009.04.01  v.6.3
+ progress feedback for long-time functions blur, sharpen, denoise
+ blur: exclude mixing of pixels from outside a selected area
+ blur: radius range expanded from 19 to 99
+ reduced mutex locking, less screen update latency
+ invert select area is much faster
+ bugifx: warp image undo button did not remove the first warp
+ bugfix: memory leak in select area
+ bugfix: unbend wrongly initialized with prior data
+ bugfix: open RAW file gave spurious error message

2009.03.15  v.6.2
+ Bug fix: for edit sequence pano, tune, pano: 2nd pano failed
  because pano first-time setup data was destroyed by tune.
+ Add window pan/scroll using mouse drag.
+ New menu function to change the current language.
+ Internal simplification of edit transactions and bitmaps.
+ More edit functions use fast preview: color_depth, rotate, unbend.
+ Select area: change to full-size bitmaps while preserving edits.
+ Several other minor improvements and bug fixes.

2009.03.14  v.6.1.3
+ Translation updates for Chinese (PRC) and French.

2009.03.12  v.6.1.2
+ Bug fix: Zoom out, right-click state was not being reset.
+ Bug fix: rotate [undo] was killing the dialog.
+ Bug fix: RGB function, right-click state was not being reset.
+ Bug fix: pano 3rd image sometimes has alignment error

2009.03.06  v.6.1.1
+ Update translations - fr de
+ Minor bug fix

2009.03.01  v.6.1 (major change)
+ Edit and save jpeg files or tiff files with 24 or 48 bits/pixel.
+ Read and edit most RAW files from digital cameras.
+ All image editing is done with 48 bits/pixel (16 bits/color).
+ Better GUI for brightness distribution and HDR weight adjustment
  (editable spline curves instead of a row of sliders).
+ Rotated images are automatically turned upright (based on EXIF).
+ Level a tilted image by dragging right edge with the mouse.
+ Undo/redo memory moved to disk, limit raised to 50 edit steps.
+ Only two parameters to set for panorama: lens_mm and lens_bow.
+ One function to synch both image thumbnails and tags.
+ Rename a series of files with base name + sequence number.
+ Global warp: distort image to fix perspective problems.
+ More information in the text file: fotoxx-6-notes.

2009.02.17  v.5.10.5
+ Following changes come via function library zfuncs rather than fotoxx.
+ Translations - handle .po file locales with only language code ("de") 
  or both language and region code ("de_AT"). Both may be present, so 
  that regional translations can be reduced to exceptions, if desired.
+ minor speedup in rotate function

2009.01.28  v.5.9 5.10
+ minor bug fixes: m_open(), m_prev(), mod_keep(), m_warp()
+ remove unnecessary window clear operation
+ minor speedups in image blur and noise-reduction functions
+ make unselect_area() available as menu function
+ updated Spanish and Galician translations

2009.01.01  v.5.8
+ Visual feedback for brightness/contrast/color edits was made faster by 
  using the window image instead of the (usually much larger) main image.
  The main image is updated when the changes are committed.
+ Erratic mouse drag in warp function was fixed.
+ Color balance was separated from brightness/whiteness adjustments.
+ Bug fix: last translation in a .po file sometimes got comment appended.
+ Sharpen, blur and noise reduction, when applied within an image area, 
  can now use "blend width" to soften the boundaries.
+ Added a modified "top hat" noise reduction method, which is more
  effective for some types of noise.
+ Zoom- returns to normal display at once instead of many steps

2008.12.01  v.5.7
+ invert selected area: subsequent edits modify all but the selected area
+ tags edit: assign "star" rating to images, search by star rating
+ translation system converted to use Gnu gettext (the Linux norm)
+ user guide reorganised to be more friendly to the RTFM inhibited
+ added auto-crop button to rotate
+ corrected minor bug in color-intensify function
+ slow mouse tracking fixed (crop and select on notebooks)

2008.11.18  v.5.6.1
+ use smaller thumbnail in preview and none if folder selected
  (be more friendly to smaller monitors)

2008.11.10  v.5.6
+ Greek translation is available
+ new function to intensify color without changing brightness
+ search images by date range (in addition to tags/keywords)
+ save and restore window and thumbnail size across sessions
+ ask for confirmation if a read-only image is moved to trash
+ color edit functions now work with select area and blend width
+ fixed tag edit bug when using old version of exiv2 (Ubuntu 6.06)
+ a few minor bug fixes and interface improvements

2008.11.01  v.5.5
+ red-eye methods consolidated and improved (not perfect, to be continued)
+ remember last image opened in prior session and return there
+ internal improvements for robustness and maintainability
+ mouse functions made more responsive for slower CPU case
+ minor improvements in user messages

2008.10.12  v.5.4.1
+ bugfix: select area may lose the last polygon point
+ bugfix: brightness distribution graph wrong if area selection used
+ bugfix: brightness/color edit dialog becomes non-responsive

2008.10.08  v.5.4
+ crop dialog: show cropped image dimensions and ratio as mouse moves
+ new red-eye removal function: 1-click and red-eye is gone
+ flatten brightness distribution: added bar-chart of distribution

2008.09.28  v.5.3.1
+ minor changes in menus and user guide

2008.09.18  v.5.3
+ make pre-align easier for panorama images having relative rotation
+ when zooming in/out, retain current image position at center

2008.09.08  v.5.2.4
+ restore missing folder icon in thumbnail index window

2008.09.08  v.5.2.3
+ save both current and top image directories on exit, recover on startup 

2008.09.06  v.5.2.2
A few minor nuisances were cleaned up:
+ stop spurious line to upper left corner in select area
+ stop jump to file + 2 when a file is trashed
+ popup "computing" message when long time to respond is needed
+ stop thumbnail window coming to foreground when not requested

2008.09.03  v.5.2.1
+ fix bug in Laplacian sharpen causing slight image darkening.
+ fix bug in select area: refused to exit if an edit function was active.

2008.09.01  v.5.2
+ Add image print capability using sister application printoxx.
      http://kornelix.squarespace.com/printoxx

2008.08.25  v.5.1.1
+ Updates for Spanish and Galligan translations
+ Fix compiler warnings in earlier versions of gcc

2008.08.24  v.5.1
+ Added a capability to store image tags or keywords and search images 
  by tags. Tags are stored inside the image Exif data.
+ Bug fix in select area function (drawing in zoomed window).
+ Image resize uses a higher-quality scaling algorithm (minor impact).
+ Fix crash in noise-reduction (selected image area abuts image edge).
+ If window is destroyed and modifications are not saved, query user.
+ Additional algorithms: two for noise reduction, one for sharpen.
+ More keyboard shortcuts, better documented.
+ Dialogs in KDE no longer get hidden behind main window.

2008.08.08  v.5.0.1
+ fix bug causing window lockup in crop function on single CPU systems

2008.08.03  v.5.0
+ Added scroll bars to more easily view and pan large images.
+ Zoom in/out via toolbar buttons, L/R-mouse clicks, or +/- keys.
+ Status bar: added current zoom % image size.
+ Added slide show mode to Admin menu (exit with escape key).
+ Converted user guide from PDF to HTML, with outboard images
    - translations share image files to save space
    - PDF viewer no longer needed by fotoxx
    - uses xdg-open to find preferred viewer for HTML file
+ Stretch function renamed to Warp 
+ Select Area is now a separate function usable with all edit functions
+ Corrected minor bug in blur function
+ Corrected lockup bug when dialogs killed while function still busy
+ Minor enhancement of noise-reduction function

2008.07.10  v.4.9
+ The user manual was translated into French.
+ New function: automatically flatten brightness distribution 0-100%.
  (fast method to bring out detail in areas of low contrast).
+ Fix freezup if another function started during HDR/panorama processing.
+ Reload most recently used image directory when starting up.
+ An "uninstall" rule was added to the Makefile
+ New command line argument: -l xx where xx = language code (en de fr es)

2008.07.06  v.4.8
+ The thumbnail index window functionality was expanded to better handle 
  hierarchical directories of image files organised by date, subject, etc.
+ The Create Thumbnails menu function now processes all sub-directories 
  at all levels within the selected image directory.

2008.06.14  v.4.7
+ prevent dialogs from continuing active after kill button is used
  to stop originating function.

2008.06.06  v.4.6
+ improved (and slower) image sharpen edge-detection algorithm
+ French translation added

2008.05.26  v.4.5
+ added a second image sharpen algorithm - unsharp mask method
+ image sharpen - add optional area selection using mouse
+ image blur function added, also with optional area selection
+ add preview image to file open dialog
+ changed from build script to traditional makefile 
+ changed name from fotox to fotoxx 

2008.05.25  v.44
+ updated Spanish translation
+ keyboard I-key displays thumbnail index, also in slide show mode
+ in thumbnail index window, KB keys now mapped to various functions
+ better status feedback for long computations (e.g. sharpen)

2008.05.21  v.43
+ pano color matching revised:
   - both images adjusted 50/50 instead of right image only
   - dialog button to enable or disable auto matching
+ vary color intensity from black/white to normal to intensified
+ thumbnail file naming changed to use same name as image file
  (please delete old thumbnail files and regenerate using Admin menu)
+ trash function changed to use Desktop folder for discarded images
  (Linux has no standard location for trash folder)

2008.05.15  v.42
+ ignore redundant mouse events during image panning, avoid X11 crash
+ improve mouse interface for area selection (tune, stretch)
+ expand allowed range for image unbend axes

2008.04.20  v.41
+ code changes for compatibility with recent gcc, c-lib, and GTK2
+ add slide show mode: full screen with no menu and tool bars
+ HDR and tune: image updates are more responsive to slider adjustments
+ new menu function: generate thumbnails on disk (speeds up navigation)
+ stretch: area selection is arbitrary polygon instead of ellipse
+ rotate 90 degrees via keyboard: not an edit, needs no "discard mods?" 
+ added help functions to display README and changelog files

2008.04.16  v.40
+ added toolbar buttons to set image size (1x/2x/fit window) 
+ added monitor check function
+ avoid creation of new log file with each program startup

2008.04.12  v.39 v.39b
+ better quality image sharpen function
+ panorama unbend: horizon height and angle are adjustable
+ clone function: button to start another fotox instance 
  (you can have N images on screen with all functions enabled)
+ fix bug in sharpen function   v.39b

2008.04.06  v.38
+ Spanish translation for GUI was added (thanks, Antonio).
+ Added function to stretch/distort selected image areas.
+ Added function to sharpen fuzzy edges in image.
+ Added function to reduce noise in low-light photos.
+ Added function to set color depth, 1-8 bits per color.

2008.03.10  v.37
+ Tune area: reduce blend width to zero as pixel reaches image edge.

2008.02.20  v.36
+ Brightness and color edits can be done for a selected image area,
  outlined with the mouse. The edits are blended for smooth transition.
+ Preview images have been removed and the GUI simplified (main image
  updates are fast enough).

2008.01.29  v.35
+ separate build scripts for downloaders and package builders.
+ code changes to get application directories from build script.
+ "parameters.txt" renamed to "parameters", please rename your file.
+ German document "Schnellstart Anleitung" is available.

2008.01.01  v.34
+ multiple language capability for GUI, German translation done.
+ build script allows user choice of install location and desktop launcher.
+ fix crash after attempting to open a non-image file type.

2007.12.10  v.33
+ fix more problems with file having alpha channels (cannot rotate).
+ code cleanups for 64-bit architecture compatibility.

2007.12.04  v.32
+ handle .png and .tiff images with alpha channels.
+ prevent drag of red-eye removal circle beyond edge of image (crash).
+ small improvements in pano alignment and stretching algorithms.
+ new unbend function: remove curvature apparent in some panorama images.
+ new auto lens function: find pano lens_mm and lens_bow automatically.

2007.11.17  v.31
+ view and propagate EXIF data (optional, if package  exiv2  is installed).

2007.11.15  v.30
+ remove code to inhibit re-entrance in tune and HDR preview dialog event 
  functions (now prevented in zdialog_event function)
+ new GTK requirement: if (! g_thread_supported()) g_thread_init(0);

2007.11.11  v.29  
+ fix HDR locale bug for non-English locales

2007.11.09  v.28
+ HDR: contribution from each image can be adjusted independently 
  for 8 brightness bands
+ HDR: preview window with live feedback when sliders are adjusted
+ pano: fixed math error in image curving 
  (images can now fit better over a greater width)
+ pano: input lens focal length instead of synthetic curve factors
+ pano: bow factor is % of image size instead of pixels
+ disallow input images having an alpha-channel (transparency)
+ user can determine the quality vs compression for JPG output files

2007.10.10  v.27
+ better recovery if an image file is removed from elsewhere after fotox 
  already read the directory
+ speedup of y-stretch algorithm (benchmark reduced from 40 to 33 seconds)
+ red eye reduction function was added
+ "comp" renamed to "HDR" (the popular name for this method)
+ toolbar split into two toolbars to make more room
+ images are displayed in the center of the window instead of top left

2007.09.25  v.26
+ convenience buttons for tune function: undo / redo / apply / reset 
+ set window name to current file name / directory, remove from status bar
+ fix memory leak in undo/redo functions
+ better saturation prevention in pano automatic color matching

2007.09.20  v.25
+ comp and pano: images are aligned using high-contrast "edge" pixels 
  instead of random pixels, allowing a reduction in pixels sampled and a 
  corresponding increase in speed.
+ pano_image_stretch parameter can be 0 (no stretch) or a stretch range
+ tune now has a preview window which is updated in real-time with sliders

2007.08.28  v.24
+ added redo button / function.  undo / redo depth expanded to 20.
+ file size (megabytes) shown in status bar.
+ jump to new image directory and file from navigation window
+ change thumbnail size and quantity displayed in navigation window

2007.08.20  v.23
+ Panorama image alignment improved for images made with wide-angle lenses.
+ Parameters for alignment search range and step size are no longer needed.
+ Panorama and HDR: image alignment is slightly more accurate.
+ Crop: show new image pixel size in the status bar as margins are moved.
+ Fixed locale bug affecting resize command for non-English systems.

2007.08.12  v.22
+ Panorama: separate x / y curve factors (significant for wide-angle lenses)
+ Crop function made easier to use: mouse click or drag to change region.
+ Detect and update "stale" thumbnails (file updated after thumbnail created).
+ New icons for thumbnail navigation window (thanks to Jan).
+ Parameters have changed (review parms function in user guide)

2007.08.01  v.21
+ Cool new icons complements of Jan.
+ Optional thumbnail caching on disk: 5x faster for big directories

2007.07.22  v.20
+ Improved comp and pano alignment algorithm: pixel brightness differences 
  are matched using a 64 bin distribution per color. This allows a smaller 
  sample size and faster execution.
+ Improved color matching in pano: the distributions per color of the 
  overlapped image areas are matched, instead of only the brightnesses. 
+ Added a "reset" convenience button to the tune function (thanks, Jan).
+ A mouse-click on an image causes that region to display full size.

2007.07.11  v.19
+ added thumbnail index window to navigate directories with many image files

2007.07.05  v.18   v.18b
+ L and R keys can be used to rotate an image -90 or +90 degrees
+ for image file name on the command line, -f is now optional
+ (v.18b) correct bad zmalloc length for command line files 

2007.07.04  v.17
+ follow Linux convention for application files in /home/username/.fotox/
+ added keyboard mappings for the buttons prev, next, and trash.
+ allow show/hide of hidden files in parameter open/save dialog
+ new command line option: -f <initial image file>

2007.06.13  v.16
+ added status bar progress indicator for comp and pano
+ new parameter: comp_prealign_size = initial size for image alignment
+ improved method for sampling pixels during image alignment
+ reduced default pixel sample from 200K to 100K (comp and pano speedup)
+ bug fix: failed to find parameter file if current directory not 
  execution directory
+ added command line options to specify image directory and parameters file
+ made improvements in user guide

2007.06.04  v.15  v.15b
+ add resize function
+ add trash function (move file to trash can)
+ undo increased from 1 to 10 previous states
+ correct crash if crop is attempted with no area selected
+ correct hang if window destroyed and modified image retained (15b)

2007.05.26  v.14  v.14b
+ tune dialog: add buttons to move all sliders together
+ better toolbar icons
+ correct crash with rotate undo (v.14b)

2007.05.24  v.13
+ add the crop function (crop images)
+ add the rotate function (rotate images)
+ add prev/next buttons for directories with many image files

2007.05.20  v.12
+ combine brightness and color adjustment in the same dialog for 
  simplicity and flexibility

2007.05.13  v.11
+ convert from menu/toolbar macros to zfuncs functions
+ bug fix: pano crash when two images have different heights
+ pano - add interactive compensation for barrel and pincushion distortion
+ pano - simpler pre-alignment algorithm

2007.03.19  v.10
+ corrected bug affecting panorama alignment when 3rd image is added
+ added parameter to compensate for optical "barrel" distortion and 
  improve image fit

2007.03.05  v.09
+ comp and pano image alignment algorithm reworked for speed and accuracy
+ xfog - increase magnitude of effect
+ pano no longer crops in the vertical dimension, since this prevents 
  addition of an additional image to the ones already joined
+ adjustable parameters moved from program constants into a GUI editor

2007.02.19  v.08
+ comp - correct bug when scaling up from small to full-size images
+ xlev - simpler method of calculating revised brightness levels

2007.02.10  v.07  
+ comp and pano - faster alignment using small images for initial stage
+ pano - pre-alignment rotation to cancel rotation in the input images
+ pano - transparent image overlap area for easier alignment
+ pano - images can be curved as needed for more precise alignment
+ pano - auto cropping of final image

2007.01.30  v.06
+ panorama - allow unequal size images
+ panorama - allow 3 or more images to be joined in stages
+ panorama - variable blending of images to suppress color imbalances

2007.01.28	v.05  panorama alignment - improved algorithm, visual feedback
2007.01.22	v.04  added panorama function
2007.01.15	v.03  bug fix, segmentation fault 
2007.01.08	v.02  added composite image function
2007.01.01	v.01  initial release, with defog and change exposure level