opencv - 如何在opencv中将此c代码转换为c++

Question

我是opencv的初学者，学习Opencv是用C编写的代码。我需要转换为C++。

IplImage *imgY = cvCreateImage(imageSize, IPL_DEPTH_8U, 1);  
IplImage *imgCr = cvCreateImage(imageSize, IPL_DEPTH_8U, 1);  
IplImage *imgCb = cvCreateImage(imageSize, IPL_DEPTH_8U, 1);  
IplImage *imgYCrCb = cvCreateImage(imageSize, img->depth, img->nChannels); 

cvCvtColor(img,imgYCrCb,CV_BGR2YCrCb);  
cvSplit(imgYCrCb, imgY, imgCr, imgCb, 0);  

unsigned char *pY, *pCr, *pCb, *pMask;
pY = (unsigned char *)imgY->imageData;  
pCr = (unsigned char *)imgCr->imageData;  
pCb = (unsigned char *)imgCb->imageData;
pMask = (unsigned char *)mask->imageData;  

Answer 1

参考：

• http://opencv.willowgarage.com/documentation/cpp/c++_cheatsheet.html
• 和http://opencv.willowgarage.com/wiki/Welcome?action=AttachFile&do=get&target=opencv_cheatsheet.pdf

例如，

IplImage *imgY = cvCreateImage(imageSize, IPL_DEPTH_8U, 1); 

变成

cv::Mat imgY = cv::Mat(imageSize, CV_8UC1);

和

cvCvtColor(img,imgYCrCb,CV_BGR2YCrCb);

变成

cv::cvtColor(img, imgYCrCb, CV_BGR2YCrCb);

等等 ...

编辑 ：

回答您的评论：OpenCV 2 消除了手动管理内存的需要。

因此，代码可以重写为：

cv::Mat imgYCrCb;
std::vector<cv::mat> yCrCb_channels;

cv::cvtColor(img,imgYCrCb,CV_BGR2YCrCb);   
cv::split(imgYCrCb, yCrCb_channels);
unsigned char * pY = (uchar *) yCrCn_channels[1].data;

建议：阅读http://www.amazon.com/dp/1849513244/?tag=stackoverfl08-20，它涵盖了 C++ opencv 接口。