如何将此c代码转换为opencv中的C++

Question

我是opencv的入门者，Learning Opencv的代码是用C编写的。 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

参见：

• 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); 

变得

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

和

cvCvtColor(img,imgYCrCb,CV_BGR2YCrCb); 

成为

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

等等...

编辑：

回答您的评论： OpenCV的2不再需要手动管理内存。

所以，代码可以被重写为：

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：读http://www.amazon.com/dp/1849513244/?tag=stackoverfl08-20，它涵盖了C++的OpenCV接口。