前三种方式转载：http://blog.csdn.net/onezeros/article/details/6342567
第一种：RGB color space
第二种：RG color space
第三种：Ycrcb之cr分量+otsu阈值化
第四种：YCrCb中133widthStep;
for (int w=0;wwidth;w++) { if ((prgb[R]>95 && prgb[G]>40 && prgb[B]>20 && prgb[R]-prgb[B]>15 && prgb[R]-prgb[G]>15/*&& !(prgb[R]>170&&prgb[G]>170&&prgb[B]>170)*/)||//uniform illumination (prgb[R]>200 && prgb[G]>210 && prgb[B]>170 && abs(prgb[R]-prgb[B])prgb[B]&& prgb[G]>prgb[B])//lateral illumination ) { memcpy(pdst,prgb,3); } prgb+=3; pdst+=3; } } cvCopyImage(dst,_dst); cvReleaseImage(&dst); } // skin detection in rg space void cvSkinRG(IplImage* rgb,IplImage* gray) { assert(rgb->nChannels==3&&gray->nChannels==1); const int R=2; const int G=1; const int B=0; double Aup=-1.8423; double Bup=1.5294; double Cup=0.0422; double Adown=-0.7279; double Bdown=0.6066; double Cdown=0.1766; for (int h=0;hheight;h++) { unsigned char* pGray=(unsigned char*)gray->imageData+h*gray->widthStep; unsigned char* pRGB=(unsigned char* )rgb->imageData+h*rgb->widthStep; for (int w=0;wwidth;w++) { int s=pRGB[R]+pRGB[G]+pRGB[B]; double r=(double)pRGB[R]/s; double g=(double)pRGB[G]/s; double Gup=Aup*r*r+Bup*r+Cup; double Gdown=Adown*r*r+Bdown*r+Cdown; double Wr=(r-0.33)*(r-0.33)+(g-0.33)*(g-0.33); if (gGdown && Wr>0.004) { *pGray=255; } else { *pGray=0; } pGray++; pRGB+=3; } } } // implementation of otsu algorithm // author: onezeros#yahoo.cn // reference: Rafael C. Gonzalez. Digital Image Processing Using MATLAB void cvThresholdOtsu(IplImage* src, IplImage* dst) { int height=src->height; int width=src->width; //histogram float histogram[256]={0}; for(int i=0;iimageData+src->widthStep*i; for(int j=0;jimageData+h*ycrcb->widthStep; unsigned char* psrc=(unsigned char*)src->imageData+h*src->widthStep; unsigned char* pdst=(unsigned char*)dst->imageData+h*dst->widthStep; for (int w=0;wwidth;w++) { if (pycrcb[Cr]>=133&&pycrcb[Cr]=77&&pycrcb[Cb]imageData+h*hsv->widthStep; unsigned char* psrc=(unsigned char*)src->imageData+h*src->widthStep; unsigned char* pdst=(unsigned char*)dst->imageData+h*dst->widthStep; for (int w=0;wwidth;w++) { if (phsv[H]>=7&&phsv[H]
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