99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
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// Little cms
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// Copyright (C) 1998-2011 Marti Maria
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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#include "lcms2mt.h"
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#include <math.h>
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static
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double VecDist(cmsUInt8Number bin[3], cmsUInt8Number bout[3])
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{
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double rdist, gdist, bdist;
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rdist = fabs((double) bout[0] - bin[0]);
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gdist = fabs((double) bout[1] - bin[1]);
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bdist = fabs((double) bout[2] - bin[2]);
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return (sqrt((rdist*rdist + gdist*gdist + bdist*bdist)));
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}
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int main(int argc, char* argv[])
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{
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int r, g, b;
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cmsUInt8Number RGB[3], RGB_OUT[3];
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cmsHTRANSFORM xform;
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cmsHPROFILE hProfile;
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double err, SumX=0, SumX2=0, Peak = 0, n = 0;
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if (argc != 2) {
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printf("roundtrip <RGB icc profile>\n");
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return 1;
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}
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hProfile = cmsOpenProfileFromFile(argv[1], "r");
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if (hProfile == NULL)
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{
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printf("invalid profile\n");
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return 1;
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}
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xform = cmsCreateTransform(hProfile,TYPE_RGB_8, hProfile, TYPE_RGB_8, INTENT_RELATIVE_COLORIMETRIC, cmsFLAGS_NOOPTIMIZE);
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if (xform == NULL)
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{
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printf("Not a valid RGB profile\n");
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return 1;
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}
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for (r=0; r< 256; r++) {
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printf("%d \r", r);
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for (g=0; g < 256; g++) {
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for (b=0; b < 256; b++) {
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RGB[0] = r;
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RGB[1] = g;
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RGB[2] = b;
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cmsDoTransform(xform, RGB, RGB_OUT, 1);
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err = VecDist(RGB, RGB_OUT);
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SumX += err;
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SumX2 += err * err;
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n += 1.0;
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if (err > Peak)
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Peak = err;
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}
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}
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}
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printf("Average %g\n", SumX / n);
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printf("Max %g\n", Peak);
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printf("Std %g\n", sqrt((n*SumX2 - SumX * SumX) / (n*(n-1))));
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cmsCloseProfile(hProfile);
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cmsDeleteTransform(xform);
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return 0;
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}
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