def test_rgb_to_xyz():
rgb_arr = _img()[:, 0]
float_arr = transform.ensure_rgb_float(rgb_arr)
xyz_arr = _nphusl._rgb_to_xyz(rgb_arr)
for xyz, rgb, rgbf in zip(xyz_arr, rgb_arr, float_arr):
diff = xyz - husl.rgb_to_xyz(rgbf)
_diff(xyz, husl.rgb_to_xyz(rgbf))
def test_rgb_to_xyz_3d():
img = _img()
float_img = transform.ensure_rgb_float(img)
xyz_arr = _nphusl._rgb_to_xyz(img)
for row in range(img.shape[0]):
for col in range(img.shape[1]):
_diff(xyz_arr[row, col], husl.rgb_to_xyz(float_img[row, col]))
def test_xyz_to_luv():
rgb_arr = _img()[:, 0]
xyz_arr = _nphusl._rgb_to_xyz(rgb_arr)
luv_arr = _nphusl._xyz_to_luv(xyz_arr)
for luv, xyz in zip(luv_arr, xyz_arr):
diff = luv - husl.xyz_to_luv(xyz)
_diff(luv, husl.xyz_to_luv(xyz))
def test_rgb_to_lch_chain():
rgb_arr = _img()[:, 0]
xyz_arr = _nphusl._rgb_to_xyz(rgb_arr)
luv_arr = _nphusl._xyz_to_luv(xyz_arr)
lch_arr = _nphusl._luv_to_lch(luv_arr)
lch_arr2 = _nphusl._rgb_to_lch(rgb_arr)
assert np.all(lch_arr == lch_arr2)
def test_xyz_to_luv_3d():
rgb_arr = _img()
xyz_arr = _nphusl._rgb_to_xyz(rgb_arr)
luv_arr = _nphusl._xyz_to_luv(xyz_arr)
for row in range(luv_arr.shape[0]):
for col in range(luv_arr.shape[1]):
old_luv = husl.xyz_to_luv(xyz_arr[row, col])
_diff(luv_arr[row, col], old_luv)
def test_lch_to_luv():
img = _img()
lch = _nphusl._rgb_to_lch(img)
luv = _nphusl._lch_to_luv(lch) # we're testing this
xyz = _nphusl._rgb_to_xyz(img)
luv_2 = _nphusl._xyz_to_luv(xyz)
lch_2 = _nphusl._luv_to_lch(luv_2)
_diff(lch_2, lch) # just a sanity check on RGB -> LCH
_diff(luv, luv_2)
def test_luv_to_lch_3d():
img = _img()
xyz_arr = _nphusl._rgb_to_xyz(img)
luv_arr = _nphusl._xyz_to_luv(xyz_arr)
lch_new = _nphusl._luv_to_lch(luv_arr)
for row in range(lch_new.shape[0]):
for col in range(lch_new.shape[1]):
lch_old = _ref_to_lch(img[row, col])
_diff(lch_new[row, col], lch_old)
def test_luv_to_lch():
rgb_arr = _img()[:, 14]
float_arr = transform.ensure_rgb_float(rgb_arr)
rgb_arr = rgb_arr.reshape((rgb_arr.size // 3, 3))
xyz_arr = _nphusl._rgb_to_xyz(rgb_arr)
luv_arr = _nphusl._xyz_to_luv(xyz_arr)
lch_arr = _nphusl._luv_to_lch(luv_arr)
for i in range(rgb_arr.shape[0]):
xyz = husl.rgb_to_xyz(float_arr[i])
_diff(xyz, xyz_arr[i])
luv = husl.xyz_to_luv(xyz)
_diff(luv, luv_arr[i])
lch = husl.luv_to_lch(luv)
_diff(lch, lch_arr[i])
def test_luv_to_xyz():
img = _img()
xyz = _nphusl._rgb_to_xyz(img)
luv = _nphusl._xyz_to_luv(xyz)
xyz_2 = _nphusl._luv_to_xyz(luv)
_diff(xyz_2, xyz)
def test_xyz_to_rgb():
img = ensure_float(_img())
xyz = _nphusl._rgb_to_xyz(img)
rgb = _nphusl._xyz_to_rgb(xyz)
_diff(img, rgb)