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Fixed another mistake in curve brigthness ciecam

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This commit is contained in:
Desmis 2017-09-13 13:48:24 +02:00
parent 5bd82a5c88
commit de9c742d27
2 changed files with 24 additions and 9 deletions
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4
rtengine/ciecam02.cc
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@ -178,6 +178,8 @@ void Ciecam02::curveJ (double br, double contr, int db, LUTf & outCurve, LUTu &
for (int i = 0; i < (db * 32768); i++) {
outCurve[i] = db * 32768.0 * dcurve[i];
}
// printf("double out500=%f out15000=%f\n", outCurve[500], outCurve[15000]);
}
void Ciecam02::curveJfloat (float br, float contr, const LUTu & histogram, LUTf & outCurve)
@ -268,6 +270,8 @@ void Ciecam02::curveJfloat (float br, float contr, const LUTu & histogram, LUTf
}
outCurve *= 32767.f;
//printf("out500=%f out15000=%f\n", outCurve[500], outCurve[15000]);
//outCurve.dump("brig");
}
/**

29
rtengine/improcfun.cc
View File

@ -1681,11 +1681,11 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
}
}
/*
if (alg >= 2 && la < 200.f) {
la = 200.f;
}
*/
const float la2 = float (params->colorappearance.adaplum);
// level of adaptation
@ -1996,7 +1996,7 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
if (CAMBrightCurveQ.dirty) {
Ciecam02::curveJfloat (params->colorappearance.qbright, params->colorappearance.qcontrast, hist16Q, CAMBrightCurveQ);//brightness and contrast Q
CAMBrightCurveQ /= coefQ;
// CAMBrightCurveQ /= coefQ;
CAMBrightCurveQ.dirty = false;
}
}
@ -2146,7 +2146,11 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
Qpro = QproFactor * sqrtf (Jpro);
Cpro = (spro * spro * Qpro) / (10000.0f);
} else if (alg == 2) {
Qpro = CAMBrightCurveQ[ (float) (Qpro * coefQ)]; //brightness and contrast
//printf("Qp0=%f ", Qpro);
Qpro = CAMBrightCurveQ[ (float) (Qpro * coefQ)] / coefQ; //brightness and contrast
//printf("Qpaf=%f ", Qpro);
float Mp, sres;
Mp = Mpro / 100.0f;
Ciecam02::curvecolorfloat (mchr, Mp, sres, 2.5f);
@ -2160,7 +2164,7 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
Qpro = (Qpro == 0.f ? epsil : Qpro); // avoid division by zero
spro = 100.0f * sqrtf ( Mpro / Qpro );
} else { /*if(alg == 3) */
Qpro = CAMBrightCurveQ[ (float) (Qpro * coefQ)]; //brightness and contrast
Qpro = CAMBrightCurveQ[ (float) (Qpro * coefQ)] / coefQ; //brightness and contrast
float Mp, sres;
Mp = Mpro / 100.0f;
@ -2237,6 +2241,7 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
} else if (curveMode == ColorAppearanceParams::TC_MODE_BRIGHT) {
//attention! Brightness curves are open - unlike Lightness or Lab or RGB==> rendering and algoritms will be different
float coef = ((aw + 4.f) * (4.f / c)) / 100.f;
float Qanc = Qpro;
float Qq = (float) Qpro * 327.68f * (1.f / coef);
float Qold100 = (float) Qpro / coef;
@ -2262,8 +2267,9 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
Qq = 0.7f * (Qq - Qold) + Qold; // not zero ==>artifacts
}
Qpro = (float) (Qq * (coef) / 327.68f);
Jpro = 100.f * (Qpro * Qpro) / ((4.0f / c) * (4.0f / c) * (aw + 4.0f) * (aw + 4.0f));
Qpro = Qanc * (Qq / Qold);
// Jpro = 100.f * (Qpro * Qpro) / ((4.0f / c) * (4.0f / c) * (aw + 4.0f) * (aw + 4.0f));
Jpro = Jpro * SQR (Qq / Qold);
if (Jpro < 1.f) {
Jpro = 1.f;
@ -2311,6 +2317,8 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
}
} else if (curveMode2 == ColorAppearanceParams::TC_MODE_BRIGHT) { //
float Qanc = Qpro;
float coef = ((aw + 4.f) * (4.f / c)) / 100.f;
float Qq = (float) Qpro * 327.68f * (1.f / coef);
float Qold100 = (float) Qpro / coef;
@ -2337,8 +2345,11 @@ void ImProcFunctions::ciecam_02float (CieImage* ncie, float adap, int begh, int
Qq = 0.7f * (Qq - Qold) + Qold; // not zero ==>artifacts
}
Qpro = (float) (Qq * (coef) / 327.68f);
Jpro = 100.f * (Qpro * Qpro) / ((4.0f / c) * (4.0f / c) * (aw + 4.0f) * (aw + 4.0f));
// Qpro = (float) (Qq * (coef) / 327.68f);
Qpro = Qanc * (Qq / Qold);
Jpro = Jpro * SQR (Qq / Qold);
// Jpro = 100.f * (Qpro * Qpro) / ((4.0f / c) * (4.0f / c) * (aw + 4.0f) * (aw + 4.0f));
if (t1L) { //to workaround the problem if we modify curve1-lightnees after curve2 brightness(the cat that bites its own tail!) in fact it's another type of curve only for this case
coef = 2.f; //adapt Q to J approximation