如何将NSData转换为OpenCV的图像（Mat）

Question

The app receives bytes which are the image data (PNG format) . How to convert NSData bytes or (const void *) buffer into cv::Mat? I know I have to use something like

NSData -> some array -> imdecode -> cv::Mat 

How to do this in proper way?

Answer 1

May be it will help for the other generations. The solution:

NSData *data = ....//some byte array data
cv::Mat matC = cv::imdecode(Mat(1, (int)[data length], CV_8UC1, (void*)data.bytes), CV_LOAD_IMAGE_UNCHANGED);