RGB转灰度图

bool Rgb2Gray(const char * szFilePah)

{

if(NULL == szFilePath || '\0' == *szFilePath)

{

        return false;

}

std::string strTemp = szFilePath;

//找出后缀名

std::string::size_type iPos = strTemp.find_last_of(".");

if(iPos == std::string::npos)

{

return false;

}

 

std::string strFileName = strTemp.substr(0,iPos);

std::string strSuffix = strTemp.substr(iPos+1,strTemp.length());

std::string strNewName = strFileName + "2." + strSuffix;

IplImage * pRgb = cvLoadImage(szFilePath,CV_LOAD_IMAGE_UNCHANGED);

IplImage * pGray = cvCreateImage(cvGetSize(pRgb),IPL_DEPTH_8U,1);

//转换成单通道

cvCvtColor(pRgb,pGray,CV_RGB2GRAY);

cvSaveImage(strNewName.c_str(),pGray);

cvReleaseImage(&pGray);

cvReleaseImage(&pRgb);

}

转载于:https://my.oschina.net/u/229425/blog/782855