7e33f6520f
Wolfgang added to AUTHORS.txt
PhenomX4 target added
profiles version updated
slightly enhanced Dark theme
--large-adress-aware included in the example cmake option file
111 lines
4.1 KiB
C++
111 lines
4.1 KiB
C++
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////////////////////////////////////////////////////////////////
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//
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// //exposure correction before interpolation
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//
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// code dated: December 27, 2010
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//
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// Expo_before.cc is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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////////////////////////////////////////////////////////////////
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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// Jacques Desmis <jdesmis@gmail.com>
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// use fast-demo(provisional) from Emil Martinec
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// inspired from work Guillermo Luijk and Manuel LLorens(Perfectraw)
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// I use OMP
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// This function uses parameters:
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// exposure (lineal): 2^(-8..0..8): currently 0.5 +3
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// preserve (log) : 0..8 : currently 0.1 1
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//modi : 31/12/2010
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#define LIM(x,min,max) MAX(min,MIN(x,max))
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#define CLIPF(x) LIM(x,0.0,65535.0)
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void RawImageSource::exp_bef(float expos, float preser) {
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double dt,dT2;
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clock_t t1, t2,t3,t4,t5;
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float Yp, exposure2, K, EV;
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// float LUT[65536];
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float *LUT = new float[65536];
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int i;
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int row,col;
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int width=W, height=H;
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// I use with Dcraw FDD interpolate from Luis Sanz , very fast and good, one can change for another : here with Rawtherpee == fastdemo() from Emil Martinec
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//t1 = clock();
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//float *img = new float[H*W];//to save configuration : with RT is it necessary ??
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unsigned short** imgd;
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imgd = allocArray< unsigned short >(W,H);//with memcpy : faster than for (...)
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for (int i=0; i<H; i++) {
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memcpy (imgd[i], rawData[i], W*sizeof(**imgd));}//save configuration but perhaps instable...
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fast_demo (0,0,W,H);//from Emil
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// calculate CIE luminosity
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float *YY;
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YY = (float *)calloc(width*height,sizeof *YY);// for CIE luminosity
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#pragma omp parallel default(shared)
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{
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#pragma omp 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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{int i=row*width+col;
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YY[i]=CLIPF(0.299*(float)red[row][col]+0.587*(float)green[row][col]+0.114*(float)blue[row][col]); // CIE luminosity
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}
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}
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for (int i=0; i<H; i++) {
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memcpy (rawData[i], imgd[i], W*sizeof(**imgd));}//restore config
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freeArray<unsigned short>(imgd, H);//free memory imgd
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//exposure correction inspired from G.Luijk
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if(preser==0.0){ // protect highlights
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#pragma omp parallel for shared(expos)
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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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{rawData[row][col]=CLIPF((float)rawData[row][col]*expos);}
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}else{
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// Exposure correction with highlight preservation
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if(expos>1){
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K=65535/expos*exp(-preser*log((double) 2));
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for(int j=0;j<=65535;j++) LUT[(int)j]=CLIPF(((65535-K*expos)/(65535-K)*(j-65535)+65535)/j);
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#pragma omp parallel for shared(expos)
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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(YY[row*width+col]<K){
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rawData[row][col]=CLIPF((float)rawData[row][col]*expos);}
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else{
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float exposure2=LUT[(int)YY[row*width+col]];
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rawData[row][col]=CLIPF((float)rawData[row][col]*exposure2);}}
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}
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else{
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float EV=log(expos)/log(2.0); // Convert exp. linear to EV
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float K=65535.0*exp(-preser*log((double) 2));
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for(int j=0;j<=65535;j++) LUT[(int)j]=CLIPF(exp(EV*(65535.0-j)/(65535.0-K)*log((double) 2)));
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#pragma omp parallel for shared(expos)
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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(YY[row*width+col]<K){
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rawData[row][col]=CLIPF((float)rawData[row][col]*expos);}
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else{
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float exposure2=LUT[(int)YY[row*width+col]];
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rawData[row][col]=CLIPF((float)rawData[row][col]*exposure2);}}
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}
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}
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free(YY);
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delete [] LUT;
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} |