Added non-bayer and compressed raw format support for Raw White point
see issue 1458
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@ -39,15 +39,24 @@ void RawImageSource::processRawWhitepoint(float expos, float preser) {
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// exposure correction inspired from G.Luijk
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if (fabs(preser)<0.001) {
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// No highlight protection - simple mutiplication
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for (int c=0; c<4; c++) {
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chmax[c] *= expos;
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}
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#pragma omp parallel for shared(expos)
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for (int c=0; c<4; c++) chmax[c] *= expos;
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#pragma omp parallel for
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for (int row=0;row<height;row++)
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for (int col=0;col<width;col++) {
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if (ri->isBayer()) {
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rawData[row][col] *= expos;
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} else {
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rawData[row][col*3] *= expos;
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rawData[row][col*3+1] *= expos;
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rawData[row][col*3+2] *= expos;
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}
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}
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} else {
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// calculate CIE luminosity
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float* luminosity = (float *) new float[width*height];
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if (ri->isBayer()) {
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// save old image as it's overwritten by demosaic
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float** imgd = allocArray< float >(W,H);
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@ -57,47 +66,58 @@ void RawImageSource::processRawWhitepoint(float expos, float preser) {
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// Demosaic to calc luminosity
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fast_demosaic (0,0,W,H);
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// calculate CIE luminosity
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float* luminosity = (float *) new float[width*height];
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#pragma omp parallel default(shared)
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{
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// CIE luminosity
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#pragma omp for
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#pragma omp parallel for
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for(int row=0;row<height;row++)
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for(int col=0;col<width;col++)
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luminosity[row*width+col] =
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0.299f * (float)red[row][col] + 0.587f * (float)green[row][col] + 0.114f * (float)blue[row][col];
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}
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// restore image destroyed by demosaic
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for (int i=0; i<H; i++) memcpy (rawData[i], imgd[i], W*sizeof(**imgd));
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freeArray<float>(imgd, H);
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} else {
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// Non-Bayers are already RGB
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// CIE luminosity
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#pragma omp parallel for
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for(int row=0;row<height;row++)
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for(int col=0;col<width;col++)
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luminosity[row*width+col] =
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0.299f * (float)rawData[row][col*3] + 0.587f * (float)rawData[row][col*3+1] + 0.114f * (float)rawData[row][col*3+2];
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}
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// Find maximum to adjust LUTs. New float engines clips only at the very end
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int maxVal=0;
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for(int row=0;row<height;row++)
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for(int col=0;col<width;col++)
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for (int col=0;col<width;col++) {
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if (ri->isBayer()) {
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if (rawData[row][col]>maxVal) maxVal = rawData[row][col];
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} else {
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for (int c=0;c<3;c++) if (rawData[row][col*3+c]>maxVal) maxVal = rawData[row][col*3+c];
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}
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}
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// Exposure correction with highlight preservation
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LUTf lut(maxVal+1);
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if(expos>1){
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// Positive exposure
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float K = (float) maxVal / expos*exp(-preser*log(2.0));
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for (int j=0;j<=maxVal;j++)
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lut[(int)j]=(((float)maxVal-K*expos)/((float)maxVal-K)*(j-maxVal)+(float) maxVal) / j;
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for (int c=0; c<4; c++) {
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chmax[c] *= expos;
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}
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for (int c=0; c<4; c++) chmax[c] *= expos;
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#pragma omp parallel for shared(expos)
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#pragma omp parallel for
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for(int row=0;row<height;row++)
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for(int col=0;col<width;col++){
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if (luminosity[row*width + col] < K) {
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rawData[row][col] *= expos;
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float fac = luminosity[row*width + col] < K ? expos : lut[luminosity[row*width+col]];
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if (ri->isBayer()) {
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rawData[row][col] *= fac;
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} else {
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rawData[row][col] *= lut[luminosity[row*width+col]];
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for (int c=0;c<3;c++) rawData[row][col*3+c] *= fac;
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}
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}
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} else {
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@ -108,20 +128,20 @@ void RawImageSource::processRawWhitepoint(float expos, float preser) {
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for (int j=0;j<=maxVal;j++)
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lut[(int)j] = exp(EV*((float)maxVal-j) / ((float)maxVal-K) * log(2.0));
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#pragma omp parallel for shared(expos)
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#pragma omp parallel for
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for(int row=0;row<height;row++)
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for(int col=0;col<width;col++){
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if (luminosity[row*width+col]<K) {
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rawData[row][col] *= expos;
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float fac = luminosity[row*width + col] < K ? expos : lut[luminosity[row*width+col]];
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if (ri->isBayer()) {
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rawData[row][col] *= fac;
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} else {
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rawData[row][col] *= lut[luminosity[row*width+col]];
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}
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}
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for (int c=0; c<4; c++) {
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chmax[c] *= expos;
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for (int c=0;c<3;c++) rawData[row][col*3+c] *= fac;
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}
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}
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for (int c=0; c<4; c++) chmax[c] *= expos;
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}
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delete[] luminosity;
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}
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