/
test_imaging.py
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/
test_imaging.py
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import autolens as al
import numpy as np
class TestMaskedImaging:
def test__masked_dataset_via_autoarray(self, imaging_7x7, sub_mask_7x7):
masked_imaging_7x7 = al.MaskedImaging(imaging=imaging_7x7, mask=sub_mask_7x7)
assert (masked_imaging_7x7.image.in_1d == np.ones(9)).all()
assert (
masked_imaging_7x7.image.in_2d == np.ones((7, 7)) * np.invert(sub_mask_7x7)
).all()
assert (masked_imaging_7x7.noise_map.in_1d == 2.0 * np.ones(9)).all()
assert (
masked_imaging_7x7.noise_map.in_2d
== 2.0 * np.ones((7, 7)) * np.invert(sub_mask_7x7)
).all()
assert (masked_imaging_7x7.psf.in_1d == (1.0 / 9.0) * np.ones(9)).all()
assert (masked_imaging_7x7.psf.in_2d == (1.0 / 9.0) * np.ones((3, 3))).all()
assert masked_imaging_7x7.psf_shape_2d == (3, 3)
assert type(masked_imaging_7x7.convolver) == al.Convolver
def test__inheritance_from_autoarray(
self, imaging_7x7, sub_mask_7x7, blurring_grid_7x7
):
masked_imaging_7x7 = al.MaskedImaging(
imaging=imaging_7x7,
mask=sub_mask_7x7,
grid_class=al.Grid,
psf_shape_2d=(3, 3),
inversion_pixel_limit=20.0,
inversion_uses_border=False,
inversion_stochastic=True,
preload_sparse_grids_of_planes=1,
)
assert masked_imaging_7x7.inversion_pixel_limit == 20.0
assert masked_imaging_7x7.inversion_uses_border == False
assert masked_imaging_7x7.inversion_stochastic == True
assert masked_imaging_7x7.preload_sparse_grids_of_planes == 1
grid = al.Grid.from_mask(mask=sub_mask_7x7)
assert (masked_imaging_7x7.grid == grid).all()
blurring_grid = grid.blurring_grid_from_kernel_shape(kernel_shape_2d=(3, 3))
assert (masked_imaging_7x7.blurring_grid.in_1d == blurring_grid_7x7).all()
assert (masked_imaging_7x7.blurring_grid == blurring_grid).all()
class TestSimulatorImaging:
def test__from_tracer_and_grid__same_as_tracer_image(self):
psf = al.Kernel.from_gaussian(shape_2d=(7, 7), sigma=0.5, pixel_scales=1.0)
grid = al.Grid.uniform(shape_2d=(20, 20), pixel_scales=0.05, sub_size=1)
lens_galaxy = al.Galaxy(
redshift=0.5,
light=al.lp.EllipticalSersic(intensity=1.0),
mass=al.mp.EllipticalIsothermal(einstein_radius=1.6),
)
source_galaxy = al.Galaxy(
redshift=1.0, light=al.lp.EllipticalSersic(intensity=0.3)
)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
simulator = al.SimulatorImaging(
psf=psf,
exposure_time_map=al.Array.full(fill_value=10000.0, shape_2d=grid.shape_2d),
background_sky_map=al.Array.full(fill_value=100.0, shape_2d=grid.shape_2d),
add_noise=True,
noise_seed=1,
)
imaging = simulator.from_tracer_and_grid(tracer=tracer, grid=grid)
assert (imaging.image.in_2d == imaging.image.in_2d).all()
assert (imaging.psf == imaging.psf).all()
assert (imaging.noise_map == imaging.noise_map).all()
def test__from_deflections_and_galaxies__same_as_calculation_using_tracer(self):
psf = al.Kernel.no_blur(pixel_scales=0.05)
grid = al.Grid.uniform(shape_2d=(20, 20), pixel_scales=0.05, sub_size=1)
lens_galaxy = al.Galaxy(
redshift=0.5, mass=al.mp.EllipticalIsothermal(einstein_radius=1.6)
)
source_galaxy = al.Galaxy(
redshift=1.0, light=al.lp.EllipticalSersic(intensity=0.3)
)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
simulator = al.SimulatorImaging(
psf=psf,
exposure_time_map=al.Array.full(fill_value=10000.0, shape_2d=grid.shape_2d),
background_sky_map=al.Array.full(fill_value=100.0, shape_2d=grid.shape_2d),
add_noise=True,
noise_seed=1,
)
imaging = simulator.from_deflections_and_galaxies(
deflections=tracer.deflections_from_grid(grid=grid),
galaxies=[source_galaxy],
)
imaging_via_image = simulator.from_image(
image=tracer.image_from_grid(grid=grid)
)
assert (imaging.image.in_2d == imaging_via_image.image.in_2d).all()
assert (imaging.psf == imaging_via_image.psf).all()
assert (imaging.noise_map == imaging_via_image.noise_map).all()
def test__simulate_imaging_from_lens__source_galaxy__compare_to_imaging(self):
lens_galaxy = al.Galaxy(
redshift=0.5,
mass=al.mp.EllipticalIsothermal(
centre=(0.0, 0.0), einstein_radius=1.6, elliptical_comps=(0.17647, 0.0)
),
)
source_galaxy = al.Galaxy(
redshift=0.5,
light=al.lp.EllipticalSersic(
centre=(0.1, 0.1),
elliptical_comps=(0.096225, -0.055555),
intensity=0.3,
effective_radius=1.0,
sersic_index=2.5,
),
)
grid = al.Grid.uniform(shape_2d=(11, 11), pixel_scales=0.2, sub_size=1)
psf = al.Kernel.no_blur(pixel_scales=0.2)
simulator = al.SimulatorImaging(
psf=psf,
exposure_time_map=al.Array.full(fill_value=10000.0, shape_2d=grid.shape_2d),
background_sky_map=al.Array.full(fill_value=100.0, shape_2d=grid.shape_2d),
add_noise=True,
noise_seed=1,
)
imaging = simulator.from_galaxies_and_grid(
galaxies=[lens_galaxy, source_galaxy], grid=grid
)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
imaging_via_image = simulator.from_image(
image=tracer.image_from_grid(grid=grid)
)
assert (imaging.image == imaging_via_image.image).all()
assert (imaging.psf == imaging_via_image.psf).all()
assert imaging.noise_map == imaging_via_image.noise_map