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OpenCV 3.0 CvMat and cv::Mat Conversion

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09/04
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After OpenCV 3.0, CvMat cannot be directly converted to cv::Mat, we need to use function cvarrToMat() to do it. Please see the code below:

CvMat *cm;
cv::Mat m;// Before OpenCV 3.0
m = cm;
m = cv::Mat(cm); // After OpenCV 3.0
m = cv::cvarrToMat(cm);