def test_find_regions_variance_minimization(self):
"""
Tests :func:`colour_hdri.sampling.variance_minimization.\
find_regions_variance_minimization` definition.
"""
image = read_image(str(os.path.join(
SAMPLING_DIRECTORY,
'tests_light_probe_sampling_variance_minimization.exr')))
Y = np.dot(image, DEFAULT_LUMINANCE_FACTORS)
regions = find_regions_variance_minimization(Y, n=1)
self.assertListEqual(
regions,
[(0, 256, 0, 156), (0, 256, 156, 256)])
regions = find_regions_variance_minimization(Y, n=2)
self.assertListEqual(
regions,
[(0, 97, 0, 156),
(97, 256, 0, 156),
(0, 100, 156, 256),
(100, 256, 156, 256)])
regions = find_regions_variance_minimization(Y, n=4)
self.assertListEqual(
regions,
[(0, 39, 0, 91),
(39, 97, 0, 91),
(0, 39, 91, 156),
(39, 97, 91, 156),
(97, 159, 0, 92),
(97, 159, 92, 156),
(159, 256, 0, 93),
(159, 256, 93, 156),
(0, 42, 156, 216),
(42, 100, 156, 216),
(0, 44, 216, 256),
(44, 100, 216, 256),
(100, 163, 156, 215),
(100, 163, 215, 256),
(163, 256, 156, 216),
(163, 256, 216, 256)])
def test_highlight_regions_variance_minimization(self):
"""
Tests :func:`colour_hdri.sampling.variance_minimization.\
highlight_regions_variance_minimization` definition.
"""
image = read_image(str(os.path.join(
SAMPLING_DIRECTORY,
'tests_light_probe_sampling_variance_minimization.exr')))
Y = np.dot(image, DEFAULT_LUMINANCE_FACTORS)
regions = find_regions_variance_minimization(Y, n=4)
np.testing.assert_almost_equal(
highlight_regions_variance_minimization(image, regions),
read_image(str(os.path.join(
SAMPLING_DIRECTORY,
'tests_highlight_regions_variance_minimization.exr'))),
decimal=7)