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Fixed articfacts when using exposure saturation on dark noisy Canon image

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see issue 870
This commit is contained in:
Oliver Duis
2011-07-29 17:09:25 +02:00
parent 71683ee04b
commit 4612ad719a
1 changed files with 7 additions and 4 deletions
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11
rtengine/improcfun.cc
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@@ -338,11 +338,12 @@ void ImProcFunctions::rgbProc (Imagefloat* working, LabImage* lab, LUTf & hltone
// printf("negative values row=%d col=%d r=%f g=%f b=%f \n", i,j,r,g,b);
//}
if (abs(sat)>0.5 || hCurveEnabled || sCurveEnabled || vCurveEnabled) {
if (sat!=0 || hCurveEnabled || sCurveEnabled || vCurveEnabled) {
float h,s,v;
rgb2hsv(r,g,b,h,s,v);
if (sat > 0.5) {
s = (1-(float)sat/100)*s+(float)sat/100*(1-SQR(SQR(1-s)));
s = (1-(float)sat/100)*s+(float)sat/100*(1-SQR(SQR(1-MIN(s,1))));
if (s<0) s=0;
} else {
if (sat < -0.5)
s *= 1+(float)sat/100;
@@ -359,7 +360,8 @@ void ImProcFunctions::rgbProc (Imagefloat* working, LabImage* lab, LUTf & hltone
//shift saturation
float satparam = (sCurve->getVal((double)h)-0.5) * 2;
if (satparam > 0.00001) {
s = (1-satparam)*s+satparam*(1-SQR(1-s));
s = (1-satparam)*s+satparam*(1-SQR(1-MIN(s,1)));
if (s<0) s=0;
} else {
if (satparam < -0.00001)
s *= 1+satparam;
@@ -371,7 +373,8 @@ void ImProcFunctions::rgbProc (Imagefloat* working, LabImage* lab, LUTf & hltone
float valparam = vCurve->getVal((double)h)-0.5;
valparam *= (1-SQR(SQR(1-s)));
if (valparam > 0.00001) {
v = (1-valparam)*v+valparam*(1-SQR(1-v));
v = (1-valparam)*v+valparam*(1-SQR(1-MIN(v,1)));
if (v<0) v=0;
} else {
if (valparam < -0.00001)
v *= (1+valparam);