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//
// Little cms
// Copyright (C) 1998-2011 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
#include "lcms2.h"
#include <math.h>
static
double VecDist(cmsUInt8Number bin[3], cmsUInt8Number bout[3])
{
double rdist, gdist, bdist;
rdist = fabs((double) bout[0] - bin[0]);
gdist = fabs((double) bout[1] - bin[1]);
bdist = fabs((double) bout[2] - bin[2]);
return (sqrt((rdist*rdist + gdist*gdist + bdist*bdist)));
}
int main(int argc, char* argv[])
{
int r, g, b;
cmsUInt8Number RGB[3], RGB_OUT[3];
cmsHTRANSFORM xform;
cmsHPROFILE hProfile;
double err, SumX=0, SumX2=0, Peak = 0, n = 0;
if (argc != 2) {
printf("roundtrip <RGB icc profile>\n");
return 1;
}
hProfile = cmsOpenProfileFromFile(argv[1], "r");
xform = cmsCreateTransform(hProfile,TYPE_RGB_8, hProfile, TYPE_RGB_8, INTENT_RELATIVE_COLORIMETRIC, cmsFLAGS_NOOPTIMIZE);
for (r=0; r< 256; r++) {
printf("%d \r", r);
for (g=0; g < 256; g++) {
for (b=0; b < 256; b++) {
RGB[0] = r;
RGB[1] = g;
RGB[2] = b;
cmsDoTransform(xform, RGB, RGB_OUT, 1);
err = VecDist(RGB, RGB_OUT);
SumX += err;
SumX2 += err * err;
n += 1.0;
if (err > Peak)
Peak = err;
}
}
}
printf("Average %g\n", SumX / n);
printf("Max %g\n", Peak);
printf("Std %g\n", sqrt((n*SumX2 - SumX * SumX) / (n*(n-1))));
cmsCloseProfile(hProfile);
cmsDeleteTransform(xform);
return 0;
}
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