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Option Fftwsigma (true) to have substantially the same results FFTW Gaussianblur

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Desmis
2019-07-01 14:20:00 +02:00
parent 6bb31aff86
commit f1cc67bc2a
5 changed files with 44 additions and 25 deletions
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41
rtengine/ipretinex.cc
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@@ -969,26 +969,31 @@ void ImProcFunctions::MSRLocal(int sp, bool fftw, int lum, LabImage * bufreti, L
//emprical adjustement between FFTW radius and Gaussainblur
//under 50 ==> 10.f
// 400 ==> 1.f
float sigm = RetinexScales[scale];
float ak = -9.f / 350.f;
float bk = 10.f - 50.f * ak;
kr = ak * sigm + bk;
if(sigm < 50.f) kr = 10.f;
//above 400 at 5000 ==> 20.f
if(sigm > 400.f) {//increase ==> 5000
float ka = 19.f / 4600.f;
float kb = 1.f - 400 * ka;
kr = ka * sigm + kb;
float kga = -0.14f / 4600.f;//decrease
float kgb = 1.f - 400.f * kga;
kg = kga * sigm + kgb;
if(sigm > 5000.f) {
kr = ka * 5000.f + kb;
kg = kga * 5000.f + kgb;
}
float sigm = 1.f;
if(settings->fftwsigma == false) {//empirical formula
sigm = RetinexScales[scale];
float ak = -9.f / 350.f;
float bk = 10.f - 50.f * ak;
kr = ak * sigm + bk;
if(sigm < 50.f) kr = 10.f;
//above 400 at 5000 ==> 20.f
if(sigm > 400.f) {//increase ==> 5000
float ka = 19.f / 4600.f;
float kb = 1.f - 400 * ka;
kr = ka * sigm + kb;
float kga = -0.14f / 4600.f;//decrease
float kgb = 1.f - 400.f * kga;
kg = kga * sigm + kgb;
if(sigm > 5000.f) {
kr = ka * 5000.f + kb;
kg = kga * 5000.f + kgb;
}
}
} else {//sigma *= sigma
kg = 1.f;
kr = sigm;
}
if(!fftw) {
#ifdef _OPENMP
#pragma omp parallel //disabled with FFTW