Converting `BufferedImage` to `Mat` in OpenCV

Question

How can I convert a BufferedImage to a Mat in OpenCV?

I\'m using the JAVA wrapper for OpenCV(not JavaCV

Answer 1

One simple way would be to create a new using

Mat newMat = Mat(rows, cols, type);

then get the pixel values from your BufferedImage and put into newMat using

newMat.put(row, col, pixel);

Answer 2

I found a solution here. The solution is similar to Andriys.

Camera c;
c.Connect();
c.StartCapture();
Image f2Img, cf2Img;
c.RetrieveBuffer(&f2Img);
f2Img.Convert( FlyCapture2::PIXEL_FORMAT_BGR, &cf2Img );
unsigned int rowBytes = (double)cf2Img.GetReceivedDataSize()/(double)cf2Img.GetRows();

cv::Mat opencvImg = cv::Mat( cf2Img.GetRows(), cf2Img.GetCols(), CV_8UC3, cf2Img.GetData(),rowBytes );

Answer 3

You can do it in OpenCV as follows:

File f4 = new File("aa.png");
Mat mat = Highgui.imread(f4.getAbsolutePath());