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aaphoto Changelog:
2011/01/26 - aaphoto v0.41 - new aaRGB v0.64 version update (see aaRGB changelog)
                           - add -- switch to mark the end of option list for posix compatibility
                           - fix some warnings given by -Wextra compile option
2010/12/18 - aaphoto v0.40 - new aaRGB v0.63 version update
                           - fix some warning messages during build
                           - some changes in documentation
                           - error message when --verbose switch is used with no other ones to avoid misunderstanding
                             that other switches are still needed (aaphoto -V file)
2010/09/14 - aaphoto v0.39 - new aaRGB v0.62 version update
                           - bugfix: an ugly misconception in my paralleled code caused weird behavior when using more threads
                           - bugfix: BMP image writer function didn't zero out the BMP align bytes in file buffer
                             therefore the same output differed in some cases
                           - bugfix: PNG image reader function stored the unreliable values of pixel resolution
                             when the type was unknown
                           - rewrite the code to suffice the ISO C90 ANSI standard C form (GCC -pedantic option)
                           - new windows platform patch of libjasper for static build to replace mkstemp() function call
                             because it is not yet supported under MinGW
                           - some changes in documentation
                           - new default LDFLAG -lgomp for OpenMP
                           - update all build scripts for Debian 6 platform
2010/07/18 - aaphoto v0.38 - add verbose message showing presence of alpha channel in PNG images
                           - bugfix: fix compile with only BMP support
                           - fix some warning messages during build
                           - remove unnecessary __WIN32__ macro
2010/05/10 - aaphoto v0.37 - add OpenMP support for multi processing, all possible time intensive codes paralleled
                             __OPENMP__ directive and -fopenmp option are needed at compile time (supported since GCC v4.2)
                             (not available on windows platform yet)
                           - new -t, --threads switch added to manually set the number of working threads
                           - new aaRGB v0.61 version update
                           - bugfix: exif info was left out after last version's change in JPEG handling
                           - improve exif handling and verbose messages
                           - refine additional verbose messages
                           - remove pgx file type support because it is outdated
                           - some changes in documentation
                           - some minor code cleanup and bugfixes
2010/03/16 - aaphoto v0.36 - bugfix: fix for tmpfile() patches of libjasper and libjpeg (windows platform only)
                             when running more than one instances of aaphoto at a time
                             they all used the same temporary files and therefore the images became corrupt
                           - bugfix: it doesn't ask for administrative privileges anymore while running in an admin account
                             under vista and windows 7 (windows platform only)
                           - bugfix: the --rotate180 switch didn't turn the middle line in images with odd heights
                           - rewrite JPEG format handling entirely to be able to handle extra parameters in this format
                             separately, now libjpeg is used directly instead of libjasper for reading / writing JPEG images
                             so libjpeg is a new dependency from now, formerly only libjasper was depended on it
                           - restore original DPI values of images in BMP, JPEG and PNG formats during conversion
                           - refine program messages
                           - print the time elapsed in seconds since program start in verbose mode if not zero
                           - print extra infos of bitmap dimension, resolution and color depth in verbose mode
2010/02/25 - aaphoto v0.35 - bugfix: possible buffer overflows fixed
2010/02/19 - aaphoto v0.34 - __UNIX__ macro removed from Makefile, not needed anymore
                           - bugfix: static binary update with patches of libjasper and libjpeg
                             1) sleep() function missing on mingw32 platform
                             2) bad implementation of tmpfile() function on windows platform
                                it tries to create temporary files in the root of current directory
                                instead of the system temporary path so that causes failure for unprivileged users
                                who don't have permissions to write there
                           - update: changes in new version of libpng 1.4.0, aaio.c updated as necessary
                                png_check_sig() function replaced with png_sig_cmp()
                                setjmp(png_ptr->jmpbuf) has been deprecated, changed to setjmp(png_jmpbuf(png_ptr))
                                see more at
2010/01/10 - aaphoto v0.33 - some changes in documentation
                           - bugfix: unfreed space caused memory leak
                           - bugfix: uninitialized variable caused --resize to misbehave
                           - fix: change of return values in procedures to reflect standard exit codes
                             now it has a sense to run something like "aaphoto image.jpg && echo OK"
                             formerly return codes meant opposite
                           - fix a warning message during compile time, an include was missing
                           - boundary check of fixed size arrays added for safety reasons
                           - the --speed switch removed, it made the code less platform independent and was fussy anyway
                           - error messages printed to stderr instead of stdout from now
                           - more verbose error messages on failure of image load
2009/10/18 - aaphoto v0.32 - new aaRGB v0.60 version update
                           - new --noexif switch added to save new image without exif info
                           - new --bmp switch added for BMP format output
                           - new -o, --output switch added for alternate directory output
2009/08/23 - aaphoto v0.31 - bugfix: __BMP_ONLY__ directive is fixed in source code
                           - bugfix: writing of BMP images could result in corrupt BMP structure
                           - code cleanup in BMP write function
                           - parameters of switches also work with spaces between them
                           - new aaRGB v0.59 version update
2009/02/22 - aaphoto v0.30 - implement PNG format (RGB and Gray images read / write with alpha channel support)
                           - bugfix: reading corrupt exif info in JPEG files could get into an infinite loop
                           - bugfix: length of exif info was determined wrongly
                           - rework of the parameters and switches parsing part
                           - lots of code cleanup
                           - most of the comments in code translated to english
                           - print messages get flushed out with fflush now during process
                           - the --info switch removed
                           - the -o switch removed for safety reasons, --overwrite still available
                           - the -h switch added for unix compatibility
                           - the -j1 and -j2 switch removed, --jpg and --jp2 still available
                           - the --png switch is now new for PNG output
                           - the -s switch changed from --speed to --silent for compatibility
                           - the --mute switch changed to -s, --silent and --quiet for unix / posix compatibility
                           - the -V, --verbose switch is now new for more detailed output during image process
                           - the --test switch now turns the --autoadjust switch on by default
			   - the -d, --description and -l, --license switches removed
			   - thanks to Rezső Páder ( for the suggestions for the option switches
                           - new aaRGB v0.58 version update
2008/02/02 - aaphoto v0.29 - bugfix: color space variable was not defined during the load of BMP format
                           - bugfix: BMP format handling fixed for JPEG conversion
                           - grayscale images can also be used as an input
                           - increase file name buffer for processing files in folders
                           - Exif meta data information is now restored during conversion in JPEG images
2007/08/11 - aaphoto v0.28 - new aaRGB v0.57 version update
                           - bugfix: remove extra slashes from the end of folders
2007/07/04 - aaphoto v0.27 - new aaRGB v0.56 version update v0.56 with "Apply only on selection" function
2007/05/26 - aaphoto v0.26 - bugfix: Win32 version crashed during JPEG-2000 conversion
2007/05/19 - aaphoto v0.25 - expand functions: rotate 90, 180, 270, flip x, flip y
2007/05/01 - aaphoto v0.24 - improve timing values
                           - input parameter can be folders beside files too
                           - bitmap info parameter now works with bmp too
                           - simplify parameter input: no --autoadjust parameter needed from now, default is on
2007/04/03 - aaphoto v0.23 - new aaRGB v0.55 version update
2007/04/01 - aaphoto v0.22 - new aaRGB v0.54 version update
2007/03/30 - aaphoto v0.21 - create bmp_only macro in source code for other platforms
                           - bug fixes
2007/03/29 - aaphoto v0.20 - new aaRGB v0.53 version update
2007/02/25 - aaphoto v0.19 - extra information output within image for testing purposes
2007/02/22 - aaphoto v0.18 - custom code for BMP input/output
2007/01/24 - aaphoto v0.17 - implement JasPer encoder for further image formats
2007/01/04 - aaphoto v0.16 - stable working command-line version for linux environment with BMP format support

aaRGB Changelog:
2011/01/26 - aaRGB v0.64 - the contrast seemed strong with the default initial value of the former algorithm,
                           so now constant optimized to the new contrast algorithm introduced in 0.63
                         - add more detailed explanations to the contrast algorithm (in hungarian)
2010/12/18 - aaRGB v0.63 - include OpenMP defs in aargb.c too for standalone usage
                         - fix some warning messages during build
                         - make embedded test info image look more readable by changing the colors (--test switch)
                         - change saturation algorithm from linear to exponential
                         - improve contrast algorithm to include a self balance mechanism to avoid overexposure
                           on images with large blank areas that have relatively small details
                         - improve color balance algorithm to make it a bit more aggressive by raising the value
                           of the color difference factor of the white and black point to the 3rd power
                         - speed up process by skipping saturation part if no change is needed
                         - some memory allocation check
                         - some changes in documentation
2010/09/14 - aaRGB v0.62 - bugfix: an ugly misconception in my paralleled code caused weird behavior
                           when using more threads
                         - rewrite the code to suffice the ISO C90 ANSI standard C form (GCC -pedantic option)
2010/05/02 - aaRGB v0.61 - add OpenMP support for multi processing, all computing cycles paralleled
                         - solve warning issues with some uninitialized variables
                         - some code cleanup
2009/10/18 - aaRGB v0.60 - remove gamma handling of the lighter colors from the two-pole gamma computing
                           by setting the gamma_interval_high from 0.9 to 1, it proved to be inefficient
2009/04/05 - aaRGB v0.59 - some more code cleanup
2009/02/22 - aaRGB v0.58 - code cleanup
2007/08/11 - aaRGB v0.57 - improve black and white point analyzing
                           from now they are not scaled to perfect black and white, but to their darkest
                           and brightest color that have maximum saturation to fix overexposure problem
                         - improve saturation algorithm with full floating point computing and HSL conversion
                           to fix over saturated colors
                         - expand image information display with color balance circle for testing (--test switch)
                         - remove text information from test display (--test switch)
2007/06/21 - aaRGB v0.56 - expand functionality with "apply only on selection" to process only the selected area
2007/04/03 - aaRGB v0.55 - maximize saturation limit with a predefined constant to avoid overexposure in saturation
                           when reconverting the same image
2007/04/01 - aaRGB v0.54 - new two-pole gamma computing
                         - new saturation compensation
2007/03/29 - aaRGB v0.53 - improve contrast computing to avoid underexposure
2007/02/25 - aaRGB v0.52 - improve image information display for testing (--test switch)
2007/02/16 - aaRGB v0.51 - improve average RGB color computing for more accurate color balance calibration
2007/01/04 - aaRGB v0.49 - stable working version with gamma handling and more clever image analyzing
2006/08/29 - aaRGB project begun...
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