copyTo doesn't work on OpenCv4Android

Question

I would like to apply a mask with OpenCV4Android using the method copyTo(image, mask), but it is not working and the console doesn't show any errors.

Any idea?

Answer 1

maybe this is too late but I had the same problem and it was because my "src" had 3 Channels and my "dst" had 4 Channels.

I just wrote this:

Imgproc.cvtColor(src, auxiliar, Imgproc.COLOR_RGB2RGBA);
auxiliar.copyTo(dst, mask);