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local contrast speedups by heckflosse

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This commit is contained in:
Alberto Griggio 2017-12-19 09:43:44 +01:00
parent b8777b3d87
commit a2bd8acac9
1 changed files with 10 additions and 5 deletions
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15
rtengine/iplocalcontrast.cc
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@ -27,11 +27,14 @@
#include "gauss.h"
#include "boxblur.h"
#include "array2D.h"
#define BENCHMARK
#include "StopWatch.h"
namespace rtengine {
void ImProcFunctions::localContrast(LabImage *lab)
{
BENCHFUN
if (!params->localContrast.enabled) {
return;
}
@ -45,21 +48,23 @@ void ImProcFunctions::localContrast(LabImage *lab)
array2D<float> buf(width, height);
const float sigma = params->localContrast.radius / scale;
#ifdef _OPENMP
#pragma omp parallel
#endif
gaussianBlur(lab->L, buf, width, height, sigma);
#ifdef _OPENMP
#pragma omp parallel for
#pragma omp parallel for
#endif
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) {
buf[y][x] -= lab->L[y][x];
buf[y][x] *= a;
float bufval = (buf[y][x] - lab->L[y][x]) * a;
if (dark != 1 || light != 1) {
buf[y][x] = max(buf[y][x], half) * light + min(buf[y][x], half) * dark;
bufval = max(bufval, half) * light + min(bufval, half) * dark;
}
lab->L[y][x] += buf[y][x];
lab->L[y][x] += bufval;
}
}
}