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//draft 2013.9 //F=X2/u; ////远处细节被淹没。 亮的地方增亮明显,暗的地方更暗。 不可取。 // CvScalar rgb; // rgb=cvAvg(src); //for(y=0;y<src->height;y++) // { // unsigned char *srcrow= (unsignedchar*)(src->imageData+y*src->widthStep); // for(x=0;x<src->width;x++) // { //srcrow[3*x]=srcrow[3*x]*srcrow[3*x]/rgb.val[0]>255 ?255:srcrow[3*x]*srcrow[3*x]/rgb.val[0]; //srcrow[3*x+1]=srcrow[3*x+1]*srcrow[3*x+1]/rgb.val[1]>255? 255:srcrow[3*x+1]*srcrow[3*x+1]/rgb.val[1] ; //srcrow[3*x+2]=srcrow[3*x+2]*srcrow[3*x+2]/rgb.val[2]>255? 255:srcrow[3*x+2]*srcrow[3*x+2]/rgb.val[2]; // } // } #ifdef Enhencement_Linear // 255| ________ // | / // | / // | / // | / // | / // |/_____.______. // 0 A 255 int b=20;//上移b for(y=0;y<src->height;y++) { unsigned char *srcrow= (unsignedchar*)(src->imageData+y*src->widthStep); for (x=0;x<src->width;x++) { if (srcrow[3*x]>a)srcrow[3*x]=255; else srcrow[3*x]=(255-b)*srcrow[3*x]/(a)+b>255 ?255:(255-b)*srcrow[3*x]/(a)+b; if (srcrow[3*x+1]>a) srcrow[3*x+1]=255; else srcrow[3*x+1]=(255-b)*srcrow[3*x+1]/(a)+b>255 ?255:(255-b)*srcrow[3*x+1]/(a)+b; if (srcrow[3*x+2]>a)srcrow[3*x+2]=255; else srcrow[3*x+2]=(255-b)*srcrow[3*x+2]/(a)+b>255 ?255:(255-b)*srcrow[3*x+2]/(a)+b; } } #endif ////改进log函数 //#ifdef Enhencement_LOG // //CvScalar rgb; // //rgb=cvAvg(src); // double aa,bb,cc,aaaaa;aaaaa=255.0; // k=(a-50)/255.0; //for(y=0;y<src->height;y++) // { // unsigned char *srcrow= (unsignedchar*)(src->imageData+y*src->widthStep); // for(x=0;x<src->width;x++) // { //aa=srcrow[3*x]+0.0;bb=(double)srcrow[3*x+1]+0.0;cc=(double)srcrow[3*x+2]+0.0; // aa=log(aaaaa)-log(aa); // bb=log(aaaaa)-log(bb); // cc=log(aaaaa)-log(cc); // //if (srcrow[3*x]>a); // //else //srcrow[3*x]=srcrow[3*x]+k*srcrow[3*x]*aa<srcrow[3*x]? srcrow[3*x]:srcrow[3*x]+k*srcrow[3*x]*aa; // //srcrow[3*x]=srcrow[3*x]+k*srcrow[3*x]*aa; // //if (srcrow[3*x+1]>a); // //else //srcrow[3*x+1]=srcrow[3*x+1]+k*srcrow[3*x+1]*bb<srcrow[3*x+1]? srcrow[3*x+1]:srcrow[3*x+1]+k*srcrow[3*x+1]*bb; // //srcrow[3*x+1]=srcrow[3*x+1]+k*srcrow[3*x+1]*bb; // //if (srcrow[3*x+2]>a); // //else // srcrow[3*x+2]=srcrow[3*x+2]+k*srcrow[3*x+2]*cc<srcrow[3*x+2] ?srcrow[3*x+2]:srcrow[3*x+2]+k*srcrow[3*x+2]*cc; // //srcrow[3*x+2]=srcrow[3*x +2]+k*srcrow[3*x+2]*cc; // } // } //#endif // // //cvCvtColor(src,src,CV_BGR2YCrCb); ////转换颜色空间 #ifdef SHARPEN_Y //锐化 unsigned char x1,x2,x3,x4,x5,x6,x7,x8,x9; int n1,n2,n3,n4,n5,n6,n7,n8; IplImage* srctem=cvCreateImage(cvGetSize(src),8,3); cvCopy(src,srctem); //cvSmooth(srctem,srctem); for(int y=1;yheight-1;y++) { unsigned char *row1= (unsignedchar*)(srctem->imageData+(y-1)*srctem->widthStep); unsigned char *row2= (unsignedchar*)(srctem->imageData+y*srctem->widthStep); unsigned char *row3= (unsignedchar*)(srctem->imageData+(y+1)*srctem->widthStep); unsigned char *row= (unsignedchar*)(src->imageData+y*src->widthStep); for (int x=1;xwidth-1;x++) { x1=row1[3*(x-1)]; x2=row1[3*x]; x3=row1[3*(x+1)]; x4=row2[3*(x-1)]; x5=row2[3*x]; x6=row2[3*(x+1)]; x7=row3[3*(x-1)]; x8=row3[3*x]; x9=row3[3*(x+1)]; //Laplace //n1=x5<<3;n2=x1+x2+x3+x4+x6+x7+x8+x9;//n1+=x5; //[8 -1..........-1] n1=x5<<2;//n1+=x5; //[4 -1 -1-1 -1] n2=x2+x4+x6+x8; n1=(n1-n2)/3+x5; //锐¨?化¡¥ if(n1<0) n1=0; else if(n1>255)n1=255;//else n1=255; row[3*x]=n1; //row[3*x+1]=128; //row[3*x+2]=128; } } #endif // //cvCvtColor(src,src,CV_YCrCb2BGR);