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Speedup for DeHaze (Function MSR)

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This commit is contained in:
heckflosse
2015-08-23 21:45:34 +02:00
parent 7512989157
commit 2d4fe00aa3
1 changed files with 18 additions and 21 deletions
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39
rtengine/ipdehaz.cc
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@@ -37,6 +37,7 @@
#include "gauss.h"
#include "rawimagesource.h"
#include "improcfun.h"
#include "StopWatch.h"
#define MAX_DEHAZE_SCALES 6
#define clipdehaz( val, minv, maxv ) (( val = (val < minv ? minv : val ) ) > maxv ? maxv : val )
@@ -86,6 +87,7 @@ void mean_stddv( float **dst, float &mean, float &stddv, int W_L, int H_L )
vsquared = 0.0f;
mean = 0.0f;
// #pragma omp parallel for reduction(+:mean,vsquared) // will enable this later, because naturally it leads to differences
for (int i = 0; i <H_L; i++ )
for (int j=0; j<W_L; j++) {
mean += dst[i][j];
@@ -102,16 +104,17 @@ void mean_stddv( float **dst, float &mean, float &stddv, int W_L, int H_L )
void RawImageSource::MSR(LabImage* lab, int width, int height, int skip, LCurveParams lcur)
{
{
StopWatch Stop1("MSR");
float pond;
float mean, stddv;
float mini, delta, maxi;
float eps = 2.f;
//float gain = (float) lcur.gain;//def =1 not use
// float gain = (float) lcur.gain;//def =1 not use
float gain=1.f;
float gain2 = (float) lcur.gain;//def =1 not use
gain2/=100.f;
float offse =(float) lcur.offs;//
float offse =(float) lcur.offs;//def = 0 not use
float offset = 0.f;
float strength = (float) lcur.str;
int scal = lcur.scal;//def=3
@@ -130,7 +133,6 @@ void RawImageSource::MSR(LabImage* lab, int width, int height, int skip, LCurveP
src = new float*[H_L];
for (int i = 0; i < H_L; i++) {
src[i] = new float[W_L];
memset( src[i], 0, W_L * sizeof (float) );
}
float** dst;
dst = new float*[H_L];
@@ -142,13 +144,11 @@ void RawImageSource::MSR(LabImage* lab, int width, int height, int skip, LCurveP
in = new float*[H_L];
for (int i = 0; i < H_L; i++) {
in[i] = new float[W_L];
memset( in[i], 0, W_L * sizeof (float) );
}
float** out;
out = new float*[H_L];
for (int i = 0; i < H_L; i++) {
out[i] = new float[W_L];
memset( out[i], 0, W_L * sizeof (float) );
}
for (int i=0; i< H_L; i++) {
@@ -161,12 +161,12 @@ void RawImageSource::MSR(LabImage* lab, int width, int height, int skip, LCurveP
pond = 1.0f / (float) scal;
#ifdef _OPENMP
#pragma omp for
#pragma omp parallel for
#endif
for (int i = 0; i < H_L ; i++ )
for (int j=0; j<W_L; j++)
{
in[i][j] = (float)(src[i][j] + eps); //avoid log(0)
in[i][j] = (src[i][j] + eps); //avoid log(0)
}
for ( int scale = 0; scale < scal; scale++ )
@@ -180,10 +180,13 @@ void RawImageSource::MSR(LabImage* lab, int width, int height, int skip, LCurveP
gaussVertical<float> (out, out, *pBuffer,W_L, H_L, DehazeScales[scale]);
delete pBuffer;
}
#ifdef _OPENMP
#pragma omp parallel for
#endif
for ( int i=0; i < H_L; i++)
for (int j=0; j < W_L; j++)
{
dst[i][j] += pond * (float)( log(src[i][j] + eps) - log(out[i][j]) );
dst[i][j] += pond * ( xlogf((in[i][j])/out[i][j]) );
}
}
@@ -196,21 +199,16 @@ void RawImageSource::MSR(LabImage* lab, int width, int height, int skip, LCurveP
}
delete [] out;
float beta=16384.0f;
float logBeta = xlogf(beta);
#ifdef _OPENMP
#pragma omp for
#pragma omp parallel for
#endif
for (int i=0; i< H_L; i++ )
for (int j=0; j<W_L; j++)
{
float logsrc = (float)log( (float) src[i][j] + eps );
dst[i][j] = (gain * ((float)(log(beta * (src[i][j] + eps)) - logsrc) * dst[i][j]) + offset);
dst[i][j] = (gain * (logBeta * dst[i][j]) + offset);
}
mean=0.f;stddv=0.f;
@@ -219,17 +217,16 @@ float beta=16384.0f;
mini = mean - vart*stddv;
maxi = mean + vart*stddv;
delta = maxi - mini;
printf("maxi=%f mini=%f mean=%f std=%f delta=%f\n", maxi, mini, mean, stddv, delta);
// printf("maxi=%f mini=%f mean=%f std=%f delta=%f\n", maxi, mini, mean, stddv, delta);
if ( !delta ) delta = 1.0f;
#ifdef _OPENMP
#pragma omp for
#pragma omp parallel for
#endif
for ( int i=0; i < H_L; i ++ )
for (int j=0; j< W_L; j++) {
float cd = gain2*32768.f * (( dst[i][j] - mini ) / delta) + offse;
src[i][j] = clipdehaz( cd, 0.f, 32768.f );
lab->L[i][j]=((100.f - strength)* lab->L[i][j] + strength * src[i][j])/100.f;
lab->L[i][j]=((100.f - strength)* lab->L[i][j] + strength * clipdehaz( cd, 0.f, 32768.f ))/100.f;
}
for (int i = 0; i < H_L; i++) {