def test_q6e_error_thrown_with_invalid_amount():
img = imread(pathlib.Path() / 'samples' / 'rubiks-cube.jpg')
with pytest.raises(ValueError):
single_tone(img, 0, 0.5, -1.0)
with pytest.raises(ValueError):
single_tone(img, 0, 0.5, 2.0)
def test_q6c_error_thrown_with_invalid_hue():
img = imread(pathlib.Path() / 'samples' / 'rubiks-cube.jpg')
with pytest.raises(ValueError):
single_tone(img, -10, 0.5)
with pytest.raises(ValueError):
single_tone(img, 400, 0.5)
def test_q6d_error_thrown_with_invalid_saturation():
img = imread(pathlib.Path() / 'samples' / 'rubiks-cube.jpg')
with pytest.raises(ValueError):
single_tone(img, 0, -0.5)
with pytest.raises(ValueError):
single_tone(img, 0, 1.5)
def test_q6a_perform_single_toning(tmp_path):
img = imread(pathlib.Path() / 'samples' / 'rubiks-cube.jpg')
out = single_tone(img, 45, 1, 0.5) # tones with a yellow-ish colour
imsave(tmp_path / 'single-tone.png', img_as_ubyte(out))
def test_q6b_perform_single_toning_with_greyscale(tmp_path):
img = imread(pathlib.Path() / 'samples' / 'rubiks-cube.jpg', as_gray=True)
imsave(tmp_path / 'grey.png', img_as_ubyte(img))
out = single_tone(img, 45, 1, 1.0)
imsave(tmp_path / 'single-tone.png', img_as_ubyte(out))