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

When you use as JavaCP wrapper bytedeco library (version 1.5.3) then you can use Java2DFrameUtils.

Simple usage is:

import org.bytedeco.javacv.Java2DFrameUtils;
...
BufferedImage img = ImageIO.read(new File("some/image.jpg");
Mat mat = Java2DFrameUtils.toMat(img);

Note: don't mix different wrappers, bytedeco Mat is different than opencv Mat.