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Auto Levels calculates wrong lightness value, which leads to crash of RT, Issue 2325 / Credits: Hombre, Ingo

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Ingo
2014-04-04 19:29:50 +02:00
parent 2b873eb0d4
commit 02e38cb67a
2 changed files with 43 additions and 24 deletions
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20
rtengine/curves.cc
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@@ -874,6 +874,8 @@ void CurveFactory::curveCL ( bool & clcutili,const std::vector<double>& clcurveP
if (contr>0.00001 || contr<-0.00001) {
utili=true;
DiagonalCurve* contrastcurve = NULL;
// compute mean luminance of the image with the curve applied
int sum = 0;
float avg = 0;
@@ -883,6 +885,7 @@ void CurveFactory::curveCL ( bool & clcutili,const std::vector<double>& clcurveP
//sqavg += dcurve[i]*dcurve[i] * histogram[i];
sum += histogram[i];
}
if(sum) {
avg /= sum;
//sqavg /= sum;
//float stddev = sqrt(sqavg-avg*avg);
@@ -905,9 +908,24 @@ void CurveFactory::curveCL ( bool & clcutili,const std::vector<double>& clcurveP
contrastcurvePoints.at(7) = 1.; // white point
contrastcurvePoints.at(8) = 1.; // value at white point
DiagonalCurve* contrastcurve = new DiagonalCurve (contrastcurvePoints, CURVES_MIN_POLY_POINTS/skip);
contrastcurve = new DiagonalCurve (contrastcurvePoints, CURVES_MIN_POLY_POINTS/skip);
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
} else {
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// sum has an invalid value (next to 0, producing a division by zero, so we create a fake contrast curve, producing a white image
std::vector<double> contrastcurvePoints;
contrastcurvePoints.resize(5);
contrastcurvePoints.at(0) = double(DCT_NURBS);
contrastcurvePoints.at(1) = 0.; // black point. Value in [0 ; 1] range
contrastcurvePoints.at(2) = 1.; // black point. Value in [0 ; 1] range
contrastcurvePoints.at(3) = 1.; // white point
contrastcurvePoints.at(4) = 1.; // value at white point
contrastcurve = new DiagonalCurve (contrastcurvePoints, CURVES_MIN_POLY_POINTS/skip);
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
}
// apply contrast enhancement
for (int i=0; i<32768; i++) {
dcurve[i] = contrastcurve->getVal (dcurve[i]);

1
rtengine/improcfun.cc
View File

@@ -4290,6 +4290,7 @@ fclose(f);*/
if (expcomp<0.0) expcomp = 0.0;*/
if (expcomp<-5.0) expcomp = -5.0;
if (expcomp>12.0) expcomp = 12.0;
bright = max(-100,min(bright,100));
}