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/*
Comapre Args
Copyright (C) 2006 Yangli Hector Yee
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.
You should have received a copy of the GNU General Public License along with this program;
if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "CompareArgs.h"
#include "RGBAImage.h"
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cstdlib>
#include <cstring>
static const char* copyright =
"PerceptualDiff version 1.1.1, Copyright (C) 2006 Yangli Hector Yee\n\
PerceptualDiff comes with ABSOLUTELY NO WARRANTY;\n\
This is free software, and you are welcome\n\
to redistribute it under certain conditions;\n\
See the GPL page for details: http://www.gnu.org/copyleft/gpl.html\n\n";
static const char *usage =
"PeceptualDiff image1.tif image2.tif\n\n\
Compares image1.tif and image2.tif using a perceptually based image metric\n\
Options:\n\
\t-verbose : Turns on verbose mode\n\
\t-fov deg : Field of view in degrees (0.1 to 89.9)\n\
\t-threshold p : #pixels p below which differences are ignored\n\
\t-gamma g : Value to convert rgb into linear space (default 2.2)\n\
\t-luminance l : White luminance (default 100.0 cdm^-2)\n\
\t-luminanceonly : Only consider luminance; ignore chroma (color) in the comparison\n\
\t-colorfactor : How much of color to use, 0.0 to 1.0, 0.0 = ignore color.\n\
\t-downsample : How many powers of two to down sample the image.\n\
\t-output o.ppm : Write difference to the file o.ppm\n\
\n\
\n Note: Input or Output files can also be in the PNG or JPG format or any format\
\n that FreeImage supports.\
\n";
CompareArgs::CompareArgs()
{
ImgA = NULL;
ImgB = NULL;
ImgDiff = NULL;
Verbose = false;
LuminanceOnly = false;
FieldOfView = 45.0f;
Gamma = 2.2f;
ThresholdPixels = 100;
Luminance = 100.0f;
ColorFactor = 1.0f;
DownSample = 0;
}
CompareArgs::~CompareArgs()
{
if (ImgA) delete ImgA;
if (ImgB) delete ImgB;
if (ImgDiff) delete ImgDiff;
}
bool CompareArgs::Parse_Args(int argc, char **argv)
{
if (argc < 3) {
ErrorStr = copyright;
ErrorStr += usage;
return false;
}
int image_count = 0;
const char* output_file_name = NULL;
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-fov") == 0) {
if (++i < argc) {
FieldOfView = (float) atof(argv[i]);
}
} else if (strcmp(argv[i], "-verbose") == 0) {
Verbose = true;
} else if (strcmp(argv[i], "-threshold") == 0) {
if (++i < argc) {
ThresholdPixels = atoi(argv[i]);
}
} else if (strcmp(argv[i], "-gamma") == 0) {
if (++i < argc) {
Gamma = (float) atof(argv[i]);
}
} else if (strcmp(argv[i], "-luminance") == 0) {
if (++i < argc) {
Luminance = (float) atof(argv[i]);
}
} else if (strcmp(argv[i], "-luminanceonly") == 0) {
LuminanceOnly = true;
} else if (strcmp(argv[i], "-colorfactor") == 0) {
if (++i < argc) {
ColorFactor = (float) atof(argv[i]);
}
} else if (strcmp(argv[i], "-downsample") == 0) {
if (++i < argc) {
DownSample = (int) atoi(argv[i]);
}
} else if (strcmp(argv[i], "-output") == 0) {
if (++i < argc) {
output_file_name = argv[i];
}
} else if (image_count < 2) {
RGBAImage* img = RGBAImage::ReadFromFile(argv[i]);
if (!img) {
ErrorStr = "FAIL: Cannot open ";
ErrorStr += argv[i];
ErrorStr += "\n";
return false;
} else {
++image_count;
if(image_count == 1)
ImgA = img;
else
ImgB = img;
}
} else {
fprintf(stderr, "Warning: option/file \"%s\" ignored\n", argv[i]);
}
} // i
if(!ImgA || !ImgB) {
ErrorStr = "FAIL: Not enough image files specified\n";
return false;
}
for (int i = 0; i < DownSample; i++) {
if (Verbose) printf("Downsampling by %d\n", 1 << (i+1));
RGBAImage *tmp = ImgA->DownSample();
if (tmp) {
delete ImgA;
ImgA = tmp;
}
tmp = ImgB->DownSample();
if (tmp) {
delete ImgB;
ImgB = tmp;
}
}
if(output_file_name) {
ImgDiff = new RGBAImage(ImgA->Get_Width(), ImgA->Get_Height(), output_file_name);
}
return true;
}
void CompareArgs::Print_Args()
{
printf("Field of view is %f degrees\n", FieldOfView);
printf("Threshold pixels is %d pixels\n", ThresholdPixels);
printf("The Gamma is %f\n", Gamma);
printf("The Display's luminance is %f candela per meter squared\n", Luminance);
}
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