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101 lines
3 KiB
C++
101 lines
3 KiB
C++
/*
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PerceptualDiff - a program that compares two images using a perceptual metric
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based on the paper :
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A perceptual metric for production testing. Journal of graphics tools, 9(4):33-40, 2004, Hector Yee
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Copyright (C) 2006 Yangli Hector Yee
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This program is free software; you can redistribute it and/or modify it under the terms of the
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GNU General Public License as published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with this program;
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if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include <string>
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#include "lpyramid.h"
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#include "args.h"
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#include "pdiff.h"
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static bool Yee_Compare(args_t *args)
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{
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int width_a, height_a, stride_a;
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unsigned char *data_a, *row_a;
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uint32_t *pixel_a;
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int width_b, height_b, stride_b;
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unsigned char *data_b, *row_b;
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uint32_t *pixel_b;
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unsigned int x, y, dim, pixels_failed;
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bool identical = true;
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width_a = cairo_image_surface_get_width (args->surface_a);
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height_a = cairo_image_surface_get_height (args->surface_a);
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stride_a = cairo_image_surface_get_stride (args->surface_a);
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data_a = cairo_image_surface_get_data (args->surface_a);
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width_b = cairo_image_surface_get_width (args->surface_b);
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height_b = cairo_image_surface_get_height (args->surface_b);
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stride_b = cairo_image_surface_get_stride (args->surface_b);
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data_b = cairo_image_surface_get_data (args->surface_b);
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if ((width_a != width_b) || (height_a != height_b)) {
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printf ("FAIL: Image dimensions do not match\n");
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return false;
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}
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identical = true;
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for (y = 0; y < height_a; y++) {
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row_a = data_a + y * stride_a;
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row_b = data_b + y * stride_b;
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pixel_a = (uint32_t *) row_a;
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pixel_b = (uint32_t *) row_b;
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for (x = 0; x < width_a; x++) {
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if (*pixel_a != *pixel_b) {
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identical = false;
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}
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pixel_a++;
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pixel_b++;
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}
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}
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if (identical) {
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printf ("PASS: Images are binary identical\n");
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return true;
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}
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pixels_failed = pdiff_compare (args->surface_a, args->surface_b,
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args->Gamma, args->Luminance,
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args->FieldOfView);
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if (pixels_failed < args->ThresholdPixels) {
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printf ("PASS: Images are perceptually indistinguishable\n");
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return true;
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}
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printf("FAIL: Images are visibly different\n"
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"%d pixels are different\n", pixels_failed);
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return false;
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}
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int main(int argc, char **argv)
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{
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args_t args;
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args_init (&args);
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if (!args_parse (&args, argc, argv)) {
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return -1;
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} else {
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if (args.Verbose)
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args_print (&args);
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}
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return ! Yee_Compare(&args);
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}
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