Mat <> BufferedImage conversion in OpenCV 3

Question

Apparently it was possible in OpenCV 2.4 with Java bindings to convert a Mat into a BufferedImage:

val greyMat = new Mat()
opencv_imgproc.cvtColor(mat, greyMat, opencv_imgproc.CV_BGR2GRAY, 1)
ImageIO.write(greyMat.getBufferedImage, "jpg", new File("output_grey.jpg"))

I tried updating a project that used this code (and it worked, I checked) to use OpenCV 3.1, and it seems this method has gone.

Why is this method getBufferedImage removed from API, and how do I get back to it?

score 0 · Accepted Answer · answered Nov 04 '16 at 12:14

It seems there is a separate converter class now: Java2DFrameConverter:

import org.bytedeco.javacv.Java2DFrameConverter

val greyMat = new Mat()
val conv = new Java2DFrameConverter
opencv_imgproc.cvtColor(mat, greyMat, opencv_imgproc.CV_BGR2GRAY, 1)
ImageIO.write(conv.getBufferedImage(greyMat), "jpg", new File("output_grey.jpg"))

Mat <> BufferedImage conversion in OpenCV 3

1 Answers1