Rotate image by 90, 180 or 270 degrees

Question

I need to rotate an image by either 90, 180 or 270 degrees. In OpenCV4Android I can use:

Imgproc.getRotationMatrix2D(new Point(center, center), degrees, 1);         


        

Answer 1

This is the first result when you Google it and none of these solutions really answer the question or is correct or succinct.

Core.rotate(Mat src, Mat dst, Core.ROTATE_90_CLOCKWISE); //ROTATE_180 or ROTATE_90_COUNTERCLOCKWISE