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Improve accuracy of Y to L conversion, fixes #4338

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heckflosse
2018-01-29 21:17:34 +01:00
parent 24151b313a
commit e7d90ec1a2
9 changed files with 163 additions and 275 deletions
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rtengine/iplab2rgb.cc
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@@ -318,7 +318,7 @@ Imagefloat* ImProcFunctions::lab2rgbOut (LabImage* lab, int cx, int cy, int cw,
for (int j = cx; j < cx + cw; j++) {
float fy = (0.0086206897f * rL[j]) / 327.68f + 0.1379310345f; // (L+16)/116
float fy = (Color::c1By116 * rL[j]) / 327.68f + Color::c16By116; // (L+16)/116
float fx = (0.002f * ra[j]) / 327.68f + fy;
float fz = fy - (0.005f * rb[j]) / 327.68f;
float LL = rL[j] / 327.68f;