直方图均衡化

void main(){src = cvLoadImage("man_src.png",0);dst = cvLoadImage("man_src.png",0);assert(src->width==dst->width);float p[256],p1[256],num[256];//清空三个数组memset(p,0,sizeof(p));memset(p1,0,sizeof(p1));memset(num,0,sizeof(num));int height=src->height;int width=src->width;long wMulh = height * width;//求存放图象各个灰度级出现的次数// to do use openmpfor(int x=0;x<width;x++){for(int y=0;y<height;y++){uchar v=((uchar*)(src->imageData + src->widthStep*y))[x];num[v]++;}}//求存放图像各个灰度级的出现概率for(int i=0;i<256;i++){p[i]=num[i]/wMulh;}//求存放各个灰度级之前的概率和for(int i=0;i<256;i++){for(int k=0;k<=i;k++)p1[i]+=p[k];}//直方图变换// to do use openmpfor(int x=0;x<width;x++){for(int y=0;y<height;y++){uchar v=((uchar*)(src->imageData + src->widthStep*y))[x];((uchar*)(dst->imageData + dst->widthStep*y))[x]= p1[v]*255+0.5; }}cvNamedWindow("dst",1);cvShowImage("dst",dst);cvWaitKey(0);}