public void testBufferedImageToMat() throws IOException {
Mat mat = matForImage(TEST_4_CHANNEL_IMAGE, 4);
assertEquals(4, mat.channels());
mat = matForImage(TEST_3_CHANNEL_IMAGE, 3);
assertEquals(3, mat.channels());
mat = matForImage(TEST_GRAYSCALE_IMAGE, 1);
assertEquals(1, mat.channels());
}