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Bugfixes for tone curve and exposure.

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This commit is contained in:
Emil Martinec
2010-11-13 23:15:20 -06:00
parent 4221d8f16d
commit c4ae6c30ba
3 changed files with 14 additions and 52 deletions
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47
rtengine/curves.cc
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@@ -622,47 +622,6 @@ void CurveFactory::complexCurve (double ecomp, double black, double hlcompr, dou
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// tone curve base. a: slope (from exp.comp.), b: black, def_mul: max. x value (can be>1), hr,sr: highlight,shadow recovery
/*
std::vector<double> basecurvePoints;
basecurvePoints.push_back((double)((CurveType)NURBS));
float blackx = MIN(1,black/(a*def_mul));
float whitex = 1/(a*def_mul);//point in x at which line of slope a*def_mul starting at (0,0) reaches y=1
float toneslope=(1-0)/(shoulderx-toex);
toey = 0.01 + 0.3*(MAX(0,shcompr/100.0-0.25));
toex = blackx + toey/toneslope;
if (whitex<1) {//a>1; positive EC
//move shoulder down if there is highlight rolloff
shouldery = 1-(0.3)*(MAX(0,hlcompr/100.0-0.25));
shoulderx = whitex - (1-shouldery)/toneslope;
} else {//a<1; negative EC
//if (shoulderx>1) {
shoulderx = 1;
shouldery = a*def_mul;
}
basecurvePoints.push_back(MAX(0,blackx*(1-shcompr/25.0))); //black point. Value in [0 ; 1] range
basecurvePoints.push_back(0); //black point. Value in [0 ; 1] range
basecurvePoints.push_back(toex); //toe point
basecurvePoints.push_back(toey); //value at toe point
if (toex<1) {
//add a point along the line between the toe point and shoulder point
basecurvePoints.push_back(0.4*toex+0.6*shoulderx); //mid point
basecurvePoints.push_back(0.4*toey+0.6*shouldery); //value at mid point
basecurvePoints.push_back(shoulderx); //shoulder point
basecurvePoints.push_back(shouldery); //value at shoulder point
if (shoulderx<1) {
basecurvePoints.push_back(MIN(0.99,whitex+0.01+(1-whitex-0.01)*(hlcompr/70.0)); // lead into white point
basecurvePoints.push_back(1); // value near white point
basecurvePoints.push_back(1); // white point
basecurvePoints.push_back(1); // value at white point
}
}
Curve* basecurve = NULL;
basecurve = new Curve (basecurvePoints, CURVES_MIN_POLY_POINTS/skip); // Actually, CURVES_MIN_POLY_POINTS = 1000,
*/
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
std::vector<double> brightcurvePoints;
@@ -702,7 +661,6 @@ void CurveFactory::complexCurve (double ecomp, double black, double hlcompr, dou
// apply base curve, thus, exposure compensation and black point with shadow and highlight protection
val = basecurve (val*def_mul, a, 0, def_mul, hlcompr/100.0, 0);
//val = basecurve (val*def_mul, a, black, def_mul, hlcompr/100.0, 1.5*shcompr/100.0);
//val = basecurvenew->getVal (val);
hlCurve[i] = (65535.0 * CLIPD(val));
@@ -710,7 +668,7 @@ void CurveFactory::complexCurve (double ecomp, double black, double hlcompr, dou
// change to [0,1] range
val = (double)i / 65535.0;
val = basecurve (val, 1, black, def_mul, 1, 1.5*shcompr/100.0);
val = basecurve (val, 1, black, 1, 0, 1.5*shcompr/100.0);
shCurve[i] = (65535.0 * CLIPD(val));
}
@@ -721,7 +679,6 @@ void CurveFactory::complexCurve (double ecomp, double black, double hlcompr, dou
// change to [0,1] range
double val = (double)i / 65535.0;
float val0 = val;
float cum = (int)shCurve[(int)(hlCurve[i])];
// gamma correction
if (gamma_>0)
@@ -751,8 +708,6 @@ void CurveFactory::complexCurve (double ecomp, double black, double hlcompr, dou
dcurve[i] = CLIPD(val);
}
delete tcurve;
//delete basecurvenew; // ...when you don't need it anymore
delete brightcurve;
// if skip>1, let apply linear interpolation in the skipped points of the curve