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retinex: changed gaussian part to reduce halos, small increase in processing time

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heckflosse
2015-09-14 01:46:17 +02:00
parent 4720231d53
commit 192569a6bd
1 changed files with 19 additions and 3 deletions
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22
rtengine/ipretinex.cc
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@@ -268,9 +268,25 @@ void RawImageSource::MSR(float** luminance, float** originalLuminance, int width
{
AlignedBufferMP<double>* pBuffer = new AlignedBufferMP<double> (max(W_L, H_L));
for ( int scale = 0; scale < scal; scale++ ) {
gaussHorizontal<float> (src, out, *pBuffer, W_L, H_L, RetinexScales[scale]);
gaussVertical<float> (out, out, *pBuffer, W_L, H_L, RetinexScales[scale]);
for ( int scale = scal - 1; scale >= 0; scale-- ) {
float ** source;
float sigma;
if(scale == scal - 1) { // probably large sigma. Use double gauss with sigma divided by sqrt(2.0)
sigma = RetinexScales[scale] / sqrt(2.0);
source = src;
} else { // reuse result of last iteration
sigma = sqrtf((RetinexScales[scale] * RetinexScales[scale]) / (RetinexScales[scale + 1] * RetinexScales[scale + 1]));
source = out;
}
gaussHorizontal<float> (source, out, *pBuffer, W_L, H_L, sigma);
gaussVertical<float> (out, out, *pBuffer, W_L, H_L, sigma);
if(scale == scal - 1) { // probably large sigma. Use double gauss with sigma divided by sqrt(2.0)
gaussHorizontal<float> (out, out, *pBuffer, W_L, H_L, sigma);
gaussVertical<float> (out, out, *pBuffer, W_L, H_L, sigma);
}
#ifdef __SSE2__
vfloat pondv = F2V(pond);