def test_pixel_to_world_values_different_int_types(): int_sliced = SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, np.s_[:, 0, :]) np64_sliced = SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, np.s_[:, np.int64(0), :]) pixel_arrays = ([0, 1], [0, 1]) for int_coord, np64_coord in zip( int_sliced.pixel_to_world_values(*pixel_arrays), np64_sliced.pixel_to_world_values(*pixel_arrays)): assert all(int_coord == np64_coord)
def test_invalid_slices(): with pytest.raises(IndexError): SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, [None, None, [False, False, False]]) with pytest.raises(IndexError): SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, [None, None, slice(None, None, 2)]) with pytest.raises(IndexError): SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, [None, None, 1000.100])
def test_nested_slicing(): # Make sure that if we call slicing several times, the result is the same # as calling the slicing once with the final slice settings. wcs = WCS_SPECTRAL_CUBE sub1 = SlicedLowLevelWCS( SlicedLowLevelWCS( SlicedLowLevelWCS(wcs, [slice(None), slice(1, 10), slice(None)]), [3, slice(2, None)]), [slice(None), slice(2, 8)]) sub2 = wcs[3, 3:10, 2:8] assert_allclose(sub1.pixel_to_world_values(3, 5), sub2.pixel_to_world_values(3, 5)) assert not isinstance(sub1._wcs, SlicedLowLevelWCS)
def test_dropped_dimensions_4d(cube_4d_fitswcs): sub = SlicedLowLevelWCS(cube_4d_fitswcs, np.s_[:, 12, 5, 5]) dwd = sub.dropped_world_dimensions wao_classes = dwd.pop("world_axis_object_classes") wao_components = dwd.pop("world_axis_object_components") validate_info_dict( dwd, { "value": [4.e+00, -2.e+00, 1.e+10], "world_axis_physical_types": ["pos.eq.ra", "pos.eq.dec", "em.freq"], "world_axis_names": ['Right Ascension', 'Declination', 'Frequency'], "world_axis_units": ["deg", "deg", "Hz"], "serialized_classes": False, }) assert wao_classes['celestial'][0] is SkyCoord assert wao_classes['celestial'][1] == () assert isinstance(wao_classes['celestial'][2]['frame'], ICRS) assert wao_classes['celestial'][2]['unit'] is u.deg assert wao_classes['spectral'][0:3] == (u.Quantity, (), {}) assert wao_components[0] == ('celestial', 0, 'spherical.lon.degree') assert wao_components[1] == ('celestial', 1, 'spherical.lat.degree') assert wao_components[2][0:2] == ('spectral', 0) sub = SlicedLowLevelWCS(cube_4d_fitswcs, np.s_[12, 12]) dwd = sub.dropped_world_dimensions wao_classes = dwd.pop("world_axis_object_classes") wao_components = dwd.pop("world_axis_object_components") validate_info_dict( dwd, { "value": [1.e+10, 5.e+00], "world_axis_physical_types": ["em.freq", "time"], "world_axis_names": ["Frequency", "Time"], "world_axis_units": ["Hz", "s"], "serialized_classes": False, }) assert wao_components[0][0:2] == ('spectral', 0) assert wao_components[1][0] == 'time' assert wao_components[1][1] == 0 assert wao_classes['spectral'][0:3] == (u.Quantity, (), {}) assert wao_classes['time'][0:3] == (Time, (), {})
def test_ellipsis_none_types(): wcs = SlicedLowLevelWCS(WCS_SPECTRAL_CUBE_NONE_TYPES, Ellipsis) assert wcs.pixel_n_dim == 3 assert wcs.world_n_dim == 3 assert wcs.array_shape == (30, 20, 10) assert wcs.pixel_shape == (10, 20, 30) assert wcs.world_axis_physical_types == ['pos.galactic.lat', None, 'pos.galactic.lon'] assert wcs.world_axis_units == ['deg', 'Hz', 'deg'] assert_equal(wcs.axis_correlation_matrix, [[True, False, True], [False, True, False], [True, False, True]]) assert wcs.world_axis_object_components == [('celestial', 1, 'spherical.lat.degree'), ('world', 0, 'value'), ('celestial', 0, 'spherical.lon.degree')] assert wcs.world_axis_object_classes['celestial'][0] is SkyCoord assert wcs.world_axis_object_classes['celestial'][1] == () assert isinstance(wcs.world_axis_object_classes['celestial'][2]['frame'], Galactic) assert wcs.world_axis_object_classes['celestial'][2]['unit'] is u.deg assert_allclose(wcs.pixel_to_world_values(29, 39, 44), (10, 20, 25)) assert_allclose(wcs.array_index_to_world_values(44, 39, 29), (10, 20, 25)) assert_allclose(wcs.world_to_pixel_values(10, 20, 25), (29., 39., 44.)) assert_equal(wcs.world_to_array_index_values(10, 20, 25), (44, 39, 29)) assert_equal(wcs.pixel_bounds, [(-1, 11), (-2, 18), (5, 15)]) assert str(wcs) == EXPECTED_ELLIPSIS_REPR_NONE_TYPES.strip() assert EXPECTED_ELLIPSIS_REPR_NONE_TYPES.strip() in repr(wcs)
def test_no_array_shape(): wcs = SlicedLowLevelWCS(WCS_NO_SHAPE_CUBE, Ellipsis) assert wcs.pixel_n_dim == 3 assert wcs.world_n_dim == 3 assert wcs.array_shape is None assert wcs.pixel_shape is None assert wcs.world_axis_physical_types == ['pos.galactic.lat', 'em.freq', 'pos.galactic.lon'] assert wcs.world_axis_units == ['deg', 'Hz', 'deg'] assert_equal(wcs.axis_correlation_matrix, [[True, False, True], [False, True, False], [True, False, True]]) assert len(wcs.world_axis_object_components) == 3 assert wcs.world_axis_object_components[0] == ('celestial', 1, 'spherical.lat.degree') assert wcs.world_axis_object_components[1][:2] == ('spectral', 0) assert wcs.world_axis_object_components[2] == ('celestial', 0, 'spherical.lon.degree') assert wcs.world_axis_object_classes['celestial'][0] is SkyCoord assert wcs.world_axis_object_classes['celestial'][1] == () assert isinstance(wcs.world_axis_object_classes['celestial'][2]['frame'], Galactic) assert wcs.world_axis_object_classes['celestial'][2]['unit'] is u.deg assert wcs.world_axis_object_classes['spectral'][0] is Quantity assert wcs.world_axis_object_classes['spectral'][1] == () assert wcs.world_axis_object_classes['spectral'][2] == {} assert_allclose(wcs.pixel_to_world_values(29, 39, 44), (10, 20, 25)) assert_allclose(wcs.array_index_to_world_values(44, 39, 29), (10, 20, 25)) assert_allclose(wcs.world_to_pixel_values(10, 20, 25), (29., 39., 44.)) assert_equal(wcs.world_to_array_index_values(10, 20, 25), (44, 39, 29)) assert str(wcs) == EXPECTED_NO_SHAPE_REPR.strip() assert EXPECTED_NO_SHAPE_REPR.strip() in repr(wcs)
def test_spectral_slice(): wcs = SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, [slice(None), 10]) assert wcs.pixel_n_dim == 2 assert wcs.world_n_dim == 2 assert wcs.array_shape == (30, 10) assert wcs.pixel_shape == (10, 30) assert wcs.world_axis_physical_types == ['pos.galactic.lat', 'pos.galactic.lon'] assert wcs.world_axis_units == ['deg', 'deg'] assert wcs.pixel_axis_names == ['', ''] assert wcs.world_axis_names == ['Latitude', 'Longitude'] assert_equal(wcs.axis_correlation_matrix, [[True, True], [True, True]]) assert wcs.world_axis_object_components == [('celestial', 1, 'spherical.lat.degree'), ('celestial', 0, 'spherical.lon.degree')] assert wcs.world_axis_object_classes['celestial'][0] is SkyCoord assert wcs.world_axis_object_classes['celestial'][1] == () assert isinstance(wcs.world_axis_object_classes['celestial'][2]['frame'], Galactic) assert wcs.world_axis_object_classes['celestial'][2]['unit'] is u.deg assert_allclose(wcs.pixel_to_world_values(29, 44), (10, 25)) assert_allclose(wcs.array_index_to_world_values(44, 29), (10, 25)) assert_allclose(wcs.world_to_pixel_values(10, 25), (29., 44.)) assert_equal(wcs.world_to_array_index_values(10, 25), (44, 29)) assert_equal(wcs.pixel_bounds, [(-1, 11), (5, 15)]) assert str(wcs) == EXPECTED_SPECTRAL_SLICE_REPR.strip() assert EXPECTED_SPECTRAL_SLICE_REPR.strip() in repr(wcs)
def test_celestial_range_rot(): wcs = SlicedLowLevelWCS(WCS_SPECTRAL_CUBE_ROT, [Ellipsis, slice(5, 10)]) assert wcs.pixel_n_dim == 3 assert wcs.world_n_dim == 3 assert wcs.array_shape == (30, 20, 5) assert wcs.pixel_shape == (5, 20, 30) assert wcs.world_axis_physical_types == [ 'pos.galactic.lat', 'em.freq', 'pos.galactic.lon' ] assert wcs.world_axis_units == ['deg', 'Hz', 'deg'] assert wcs.pixel_axis_names == ['', '', ''] assert wcs.world_axis_names == ['Latitude', 'Frequency', 'Longitude'] assert_equal( wcs.axis_correlation_matrix, [[True, False, True], [False, True, False], [True, False, True]]) assert len(wcs.world_axis_object_components) == 3 assert wcs.world_axis_object_components[0] == ('celestial', 1, 'spherical.lat.degree') assert wcs.world_axis_object_components[1][:2] == ('spectral', 0) assert wcs.world_axis_object_components[2] == ('celestial', 0, 'spherical.lon.degree') assert wcs.world_axis_object_classes['celestial'][0] is SkyCoord assert wcs.world_axis_object_classes['celestial'][1] == () assert isinstance(wcs.world_axis_object_classes['celestial'][2]['frame'], Galactic) assert wcs.world_axis_object_classes['celestial'][2]['unit'] is u.deg assert wcs.world_axis_object_classes['spectral'][0] is Quantity assert wcs.world_axis_object_classes['spectral'][1] == () assert wcs.world_axis_object_classes['spectral'][2] == {} assert_allclose(wcs.pixel_to_world_values(14, 29, 34), (1, 15, 24)) assert_allclose(wcs.array_index_to_world_values(34, 29, 14), (1, 15, 24)) assert_allclose(wcs.world_to_pixel_values(1, 15, 24), (14., 29., 34.)) assert_equal(wcs.world_to_array_index_values(1, 15, 24), (34, 29, 14)) assert_equal(wcs.pixel_bounds, [(-6, 6), (-2, 18), (5, 15)]) assert str(wcs) == EXPECTED_CELESTIAL_RANGE_ROT_REPR.strip() assert EXPECTED_CELESTIAL_RANGE_ROT_REPR.strip() in repr(wcs)
def test_dropped_dimensions(): wcs = WCS_SPECTRAL_CUBE sub = SlicedLowLevelWCS(wcs, np.s_[:, :, :]) assert sub.dropped_world_dimensions == {} sub = SlicedLowLevelWCS(wcs, np.s_[:, 2:5, :]) assert sub.dropped_world_dimensions == {} sub = SlicedLowLevelWCS(wcs, np.s_[:, 0]) waocomp = sub.dropped_world_dimensions.pop("world_axis_object_components") assert len( waocomp) == 1 and waocomp[0][0] == "spectral" and waocomp[0][1] == 0 waocls = sub.dropped_world_dimensions.pop("world_axis_object_classes") assert len(waocls) == 1 and "spectral" in waocls and waocls["spectral"][ 0] == u.Quantity validate_info_dict( sub.dropped_world_dimensions, { "value": [0.5], "world_axis_physical_types": ["em.freq"], "world_axis_names": ["Frequency"], "world_axis_units": ["Hz"], "serialized_classes": False, }) sub = SlicedLowLevelWCS(wcs, np.s_[:, 0, 0]) waocomp = sub.dropped_world_dimensions.pop("world_axis_object_components") assert len( waocomp) == 1 and waocomp[0][0] == "spectral" and waocomp[0][1] == 0 waocls = sub.dropped_world_dimensions.pop("world_axis_object_classes") assert len(waocls) == 1 and "spectral" in waocls and waocls["spectral"][ 0] == u.Quantity validate_info_dict( sub.dropped_world_dimensions, { "value": [0.5], "world_axis_physical_types": ["em.freq"], "world_axis_names": ["Frequency"], "world_axis_units": ["Hz"], "serialized_classes": False, }) sub = SlicedLowLevelWCS(wcs, np.s_[0, :, 0]) dwd = sub.dropped_world_dimensions wao_classes = dwd.pop("world_axis_object_classes") validate_info_dict( dwd, { "value": [12.86995801, 20.49217541], "world_axis_physical_types": ["pos.galactic.lat", "pos.galactic.lon"], "world_axis_names": ["Latitude", "Longitude"], "world_axis_units": ["deg", "deg"], "serialized_classes": False, "world_axis_object_components": [ ('celestial', 1, 'spherical.lat.degree'), ('celestial', 0, 'spherical.lon.degree') ], }) assert wao_classes['celestial'][0] is SkyCoord assert wao_classes['celestial'][1] == () assert isinstance(wao_classes['celestial'][2]['frame'], Galactic) assert wao_classes['celestial'][2]['unit'] is u.deg sub = SlicedLowLevelWCS(wcs, np.s_[5, :5, 12]) dwd = sub.dropped_world_dimensions wao_classes = dwd.pop("world_axis_object_classes") validate_info_dict( dwd, { "value": [11.67648267, 21.01921192], "world_axis_physical_types": ["pos.galactic.lat", "pos.galactic.lon"], "world_axis_names": ["Latitude", "Longitude"], "world_axis_units": ["deg", "deg"], "serialized_classes": False, "world_axis_object_components": [ ('celestial', 1, 'spherical.lat.degree'), ('celestial', 0, 'spherical.lon.degree') ], }) assert wao_classes['celestial'][0] is SkyCoord assert wao_classes['celestial'][1] == () assert isinstance(wao_classes['celestial'][2]['frame'], Galactic) assert wao_classes['celestial'][2]['unit'] is u.deg
def test_1d_sliced_low_level(time_1d_wcs): sll = SlicedLowLevelWCS(time_1d_wcs, np.s_[10:20]) world = sll.pixel_to_world_values([1, 2]) assert isinstance(world, np.ndarray) assert np.allclose(world, [27, 29])
def test_world_to_pixel_broadcasting(): wcs = SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, Ellipsis) assert_allclose(wcs.world_to_pixel_values((10, 10), 20, 25), ((29., 29.), (39., 39.), (44., 44.)))
def test_pixel_to_world_broadcasting(): wcs = SlicedLowLevelWCS(WCS_SPECTRAL_CUBE, Ellipsis) assert_allclose(wcs.pixel_to_world_values((29, 29), 39, 44), ((10, 10), (20, 20), (25, 25)))