test_colorconv.py 文件源码

def test_hsv2rgb_conversion(self):
        rgb = self.img_rgb.astype("float32")[::16, ::16]
        # create HSV image with colorsys
        hsv = np.array([colorsys.rgb_to_hsv(pt[0], pt[1], pt[2])
                        for pt in rgb.reshape(-1, 3)]).reshape(rgb.shape)
        # convert back to RGB and compare with original.
        # relative precision for RGB -> HSV roundtrip is about 1e-6
        assert_almost_equal(rgb, hsv2rgb(hsv), decimal=4)