def test_rgb_lch_roundtrip(self):
rgb = img_as_float(self.img_rgb)
lab = rgb2lab(rgb)
lch = lab2lch(lab)
lab2 = lch2lab(lch)
rgb2 = lab2rgb(lab2)
assert_array_almost_equal(rgb, rgb2)
def test_lab_lch_3d(self):
lab0 = self._get_lab0()
lch0 = lab2lch(lab0)
lch3 = lab2lch(lab0[None, None, None, :])
assert_array_almost_equal(lch0, lch3[0, 0, 0, :])
def test_lab_lch_roundtrip(self):
rgb = img_as_float(self.img_rgb)
lab = rgb2lab(rgb)
lab2 = lch2lab(lab2lch(lab))
assert_array_almost_equal(lab2, lab)