mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2025-12-20 16:20:09 +01:00
45 lines
No EOL
1.9 KiB
Text
45 lines
No EOL
1.9 KiB
Text
pdiff - a program that compares two images using
|
|
a perceptually based image metric.
|
|
Copyright (C) 2006 Yangli Hector Yee
|
|
yeehector@users.sourceforge.net
|
|
http://pdiff.sourceforge.net/
|
|
|
|
This program is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the
|
|
Free Software Foundation; either version 2 of the License,
|
|
or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE.
|
|
See the GNU General Public License for more details in the file gpl.txt.
|
|
|
|
Build Instructions
|
|
1. Download cross platform make from http://www.cmake.org
|
|
2. Download libtiff from http://www.libtiff.org. Download libpng from http://www.libpng.org
|
|
3. Edit CMakeLists.txt to tell it where to find your tiff library
|
|
4. Type cmake .
|
|
5. Type make . (or on Windows systems cmake makes a Visual Studio
|
|
Project file)
|
|
6. To specify the install directory, use make install DESTDIR="/home/me/mydist"
|
|
|
|
Usage
|
|
|
|
pdiff image1.(tif | png) image2.(tif | png) [options]
|
|
-verbose : Turns on verbose mode
|
|
-fov deg: field of view, deg, in degrees. Usually between 10.0 to 85.0.
|
|
This controls how much of the screen the oberserver is seeing. Front row of
|
|
a theatre has a field of view of around 25 degrees. Back row has a field of
|
|
view of around 60 degrees.
|
|
-threshold p : Sets the number of pixels, p, to reject. For example if p is
|
|
100, then the test fails if 100 or more pixels are perceptably different.
|
|
-gamma g : The gamma to use to convert to RGB linear space. Default is 2.2
|
|
-luminance l: The luminance of the display the observer is seeing. Default
|
|
is 100 candela per meter squared
|
|
|
|
Credits
|
|
|
|
Hector Yee, project administrator and originator - hectorgon.blogspot.com
|
|
Scott Corley, for png file IO code
|
|
Mick Weiss, Linux build and release & QA
|
|
Carl Worth, Rewrite as library, depend on cairo, and port to C |