Converting UIImage to cv::Mat

Question

I have a UIImage which is a pic captured from an iPhone Camera now I want the UIImage to be converted to cv::Mat (OpenCV). I am using the following lines of code to accompli

Answer 1

You should consider using native OpenCV functions to convert forth and back :

#import 
...
UIImage* MatToUIImage(const cv::Mat& image);
void UIImageToMat(const UIImage* image,
                         cv::Mat& m, bool alphaExist = false);

Note: if your UIImage comes from the camera, you should 'normalize' it ( iOS UIImagePickerController result image orientation after upload) before converting to cv::Mat since OpenCV does not take into account Exif data. If you don't do that the result should be misoriented.