Suppose DoIt is a function that takes a cv::Mat as argument and suppose AMat is a cv::Mat. In openCV 2.1.0
[code lang=”cpp”]
//You cannot do this
DoIt(AMat*50.0);
//Or this
DoIt((cv::Mat)AMat*50.0);
//You have to do either this:
cv:Mat temp = AMat*50;
DoIt(temp);
//Or this
DoIt((cv::Mat)(AMat*50.0));
//Or this
DoIt(cv::Mat(AMat*50.0));
[/code]