def test_threshold_minimum():
camera = util.img_as_ubyte(camerad)
threshold = threshold_minimum(camera)
assert_array_equal(threshold, 85)
astronaut = util.img_as_ubyte(astronautd)
threshold = threshold_minimum(astronaut)
assert_array_equal(threshold, 114)
def test_threshold_minimum_synthetic():
img = cp.arange(25 * 25, dtype=cp.uint8).reshape((25, 25))
img[0:9, :] = 50
img[14:25, :] = 250
threshold = threshold_minimum(img)
assert_array_equal(threshold, 95)
def test_threshold_minimum_failure():
img = cp.zeros((16 * 16), dtype=cp.uint8)
with testing.raises(RuntimeError):
threshold_minimum(img)
def test_threshold_minimum_counts():
camera = util.img_as_ubyte(camerad)
counts, bin_centers = histogram(camera.ravel(), 256, source_range='image')
threshold = threshold_minimum(hist=counts)
assert_array_equal(threshold, 85)
def test_threshold_minimum_histogram():
camera = util.img_as_ubyte(camerad)
hist = histogram(camera.ravel(), 256, source_range='image')
threshold = threshold_minimum(hist=hist)
assert_array_equal(threshold, 85)
def test_minimum(self):
with pytest.raises(RuntimeError):
threshold_minimum(self.image)