Fixed a bug in calcBlendFactor(..), #4551
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@@ -23,7 +23,7 @@
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#include "rt_math.h"
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#include "sleef.c"
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#include "opthelper.h"
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#define BENCHMARK
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//#define BENCHMARK
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#include "StopWatch.h"
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using namespace std;
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@@ -32,9 +32,19 @@ float calcBlendFactor(float val, float threshold) {
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// sigmoid function
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// result is in ]0;1] range
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// inflexion point is at (x, y) (threshold, 0.5)
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return threshold == 0.f ? 1.f : 1.f / (1.f + xexpf(-8.f * ((val / threshold) * (2.f - threshold) - 1.f )));
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return threshold == 0.f ? 1.f : 1.f / (1.f + xexpf(16.f - 16.f * val / threshold));
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}
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#ifdef __SSE2__
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vfloat calcBlendFactor(vfloat valv, vfloat thresholdv) {
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// sigmoid function
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// result is in ]0;1] range
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// inflexion point is at (x, y) (threshold, 0.5)
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const vfloat onev = F2V(1.f);
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const vfloat c16v = F2V(16.f);
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vfloat resultv = onev / (onev + xexpf(c16v - c16v * valv / thresholdv));
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return vself(vmaskf_eq(thresholdv, ZEROV), onev, resultv);
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}
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#endif
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}
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namespace rtengine
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{
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@@ -105,7 +115,7 @@ void ImProcFunctions::deconvsharpening (float** luminance, float** tmp, int W, i
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if (sharpenParam.deconvamount < 1) {
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return;
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}
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BENCHFUN
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float *tmpI[H] ALIGNED16;
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tmpI[0] = new float[W * H];
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@@ -128,39 +138,63 @@ void ImProcFunctions::deconvsharpening (float** luminance, float** tmp, int W, i
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tmpII[i][j] = luminance[i][j];
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}
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}
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// calculate contrast based blend factors to reduce sharpening in regions with low contrast
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const float contrastThreshold = sharpenParam.deconvdamping / 100.f;
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const float contrastFactor = contrastThreshold == 0.f ? 0.f : 1.f / contrastThreshold;
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float *LM = new float[W * H]; //allocation for Luminance
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float *blend = new float[W * H]; //allocation for blend factor map
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// upper border
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for(int j = 0; j < 2; j++)
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for(int i = 0, offset = j * W + i; i < W; i++, offset++) {
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blend[offset] = 0.f;
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}
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#ifdef _OPENMP
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#pragma omp parallel
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#endif
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{
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#ifdef __SSE2__
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vfloat contrastThresholdv = F2V(contrastThreshold);
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vfloat scalev = F2V(0.0625f / 327.68f);
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#endif
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#ifdef _OPENMP
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#pragma omp for schedule(dynamic,16)
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#pragma omp for schedule(dynamic,16) nowait
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#endif
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for(int j = 0; j < H; j++)
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for(int j = 2; j < H - 2; j++) {
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blend[j * W] = blend[j * W + 1] = 0.f;
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int i = 2;
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int offset = j * W + i;
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#ifdef __SSE2__
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for(; i < W - 5; i += 4, offset += 4) {
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vfloat contrastv = vsqrtf(SQRV(LVFU(luminance[j][i+1]) - LVFU(luminance[j][i-1])) + SQRV(LVFU(luminance[j+1][i]) - LVFU(luminance[j-1][i])) +
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SQRV(LVFU(luminance[j][i+2]) - LVFU(luminance[j][i-2])) + SQRV(LVFU(luminance[j+2][i]) - LVFU(luminance[j-2][i]))) * scalev;
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STVFU(blend[offset], calcBlendFactor(contrastv, contrastThresholdv));
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}
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#endif
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for(; i < W - 2; i++, offset++) {
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float contrast = sqrtf(SQR(luminance[j][i+1] - luminance[j][i-1]) + SQR(luminance[j+1][i] - luminance[j-1][i]) +
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SQR(luminance[j][i+2] - luminance[j][i-2]) + SQR(luminance[j+2][i] - luminance[j-2][i])) * 0.0625f / 327.68f;
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blend[offset] = calcBlendFactor(contrast, contrastThreshold);
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}
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blend[j * W + W - 2] = blend[j * W + W - 1] = 0.f;
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}
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#ifdef _OPENMP
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#pragma omp single
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#endif
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{
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// lower border
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for(int j = H - 2; j < H; j++)
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for(int i = 0, offset = j * W + i; i < W; i++, offset++) {
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LM[offset] = 0.f; // adjust to [0;100] and to RT variables
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}
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#ifdef _OPENMP
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#pragma omp for schedule(dynamic,16)
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#endif
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for(int j = 2; j < H - 2; j++)
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for(int i = 2, offset = j * W + i; i < W - 2; i++, offset++) {
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float contrast;
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contrast = sqrtf(SQR(luminance[j][i+1] / 327.68f - luminance[j][i-1] / 327.68f) + SQR(luminance[j+1][i] / 327.68f - luminance[j-1][i] / 327.68f)
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+ SQR(luminance[j][i+1] / 327.68f - luminance[j][i-1] / 327.68f) + SQR(luminance[j+1][i] / 327.68f - luminance[j-1][i] / 327.68f)) * 0.0625f; //for 5x5
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contrast = std::min(contrast, 1.f);
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LM[offset] = 1.f - calcBlendFactor(contrast, contrastThreshold);
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blend[offset] = 0.f;
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}
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}
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}
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float damping = sharpenParam.deconvdamping / 5.0;
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bool needdamp = false; //sharpenParam.deconvdamping > 0;
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double sigma = sharpenParam.deconvradius / scale;
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@@ -200,10 +234,10 @@ void ImProcFunctions::deconvsharpening (float** luminance, float** tmp, int W, i
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for (int i = 0; i < H; i++)
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for (int j = 0, offset = i * W + j; j < W; j++, offset++) {
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luminance[i][j] = intp(LM[offset], tmpII[i][j], luminance[i][j] * p1 + max(tmpI[i][j], 0.0f) * p2);
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luminance[i][j] = intp(blend[offset], luminance[i][j] * p1 + max(tmpI[i][j], 0.0f) * p2, tmpII[i][j]);
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}
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} // end parallel
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delete [] LM;
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delete [] blend;
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delete [] tmpI[0];
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delete [] tmpII[0];
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@@ -630,7 +664,6 @@ void ImProcFunctions::MLmicrocontrast(float** luminance, int W, int H)
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BENCHFUN
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const int k = params->sharpenMicro.matrix ? 1 : 2;
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const float contrastThreshold = params->sharpenMicro.contrast / 100;
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const float contrastFactor = contrastThreshold == 0.f ? 0.f : 1.f / contrastThreshold;
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// k=2 matrix 5x5 k=1 matrix 3x3
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const int width = W, height = H;
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const float uniform = params->sharpenMicro.uniformity; //between 0 to 100
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@@ -705,7 +738,7 @@ BENCHFUN
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+ SQR(LM[offset + 2] - LM[offset - 2]) + SQR(LM[offset + 2 * width] - LM[offset - 2 * width])) * 0.0625f; //for 5x5
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contrast = std::min(contrast, 1.f);
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float blend = 1.f - calcBlendFactor(contrast, contrastThreshold);
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float blend = calcBlendFactor(contrast, contrastThreshold);
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//matrix 5x5
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float temp = v + 4.f *( v * (s + sqrt2 * s)); //begin 3x3
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@@ -804,7 +837,7 @@ BENCHFUN
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} else {
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temp = 0.f;
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}
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luminance[j][i] = intp(blend, luminance[j][i], luminance[j][i] * (temp * temp2 + 1.f));
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luminance[j][i] = intp(blend, luminance[j][i] * (temp * temp2 + 1.f), luminance[j][i]);
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} else {
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float temp4 = LM[offset] / tempL; //
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@@ -855,7 +888,7 @@ BENCHFUN
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} else {
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temp = 0.f;
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}
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luminance[j][i] = intp(blend, luminance[j][i], luminance[j][i] / (temp * temp4 + 1.f));
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luminance[j][i] = intp(blend, luminance[j][i] / (temp * temp4 + 1.f), luminance[j][i]);
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}
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}
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}
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