def test__subtracted_images_of_planes(masked_imaging_7x7_no_blur):
g0 = al.Galaxy(redshift=0.5,
light_profile=MockLightProfile(image_2d=np.ones(1)))
g1 = al.Galaxy(redshift=0.75,
light_profile=MockLightProfile(image_2d=2.0 * np.ones(1)))
g2 = al.Galaxy(redshift=1.0,
light_profile=MockLightProfile(image_2d=3.0 * np.ones(1)))
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1, g2])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert fit.subtracted_images_of_planes[0].slim[0] == -4.0
assert fit.subtracted_images_of_planes[1].slim[0] == -3.0
assert fit.subtracted_images_of_planes[2].slim[0] == -2.0
g0 = al.Galaxy(redshift=0.5,
light_profile=MockLightProfile(image_2d=np.ones(1)))
g1 = al.Galaxy(redshift=1.0,
light_profile=MockLightProfile(image_2d=2.0 * np.ones(1)))
g2 = al.Galaxy(redshift=1.0,
light_profile=MockLightProfile(image_2d=3.0 * np.ones(1)))
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1, g2])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert fit.subtracted_images_of_planes[0].slim[0] == -4.0
assert fit.subtracted_images_of_planes[1].slim[0] == -0.0
def test__image__with_and_without_hyper_background_sky(
masked_imaging_7x7_no_blur):
g0 = al.Galaxy(redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d_value=1.0))
tracer = al.Tracer.from_galaxies(galaxies=[g0])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert fit.image.slim == pytest.approx(
np.full(fill_value=1.0, shape=(9, )), 1.0e-1)
g0 = al.Galaxy(redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d_value=1.0))
tracer = al.Tracer.from_galaxies(galaxies=[g0])
hyper_image_sky = al.hyper_data.HyperImageSky(sky_scale=1.0)
fit = al.FitImaging(
dataset=masked_imaging_7x7_no_blur,
tracer=tracer,
hyper_image_sky=hyper_image_sky,
)
assert fit.image.slim == pytest.approx(
np.full(fill_value=2.0, shape=(9, )), 1.0e-1)
assert fit.log_likelihood == pytest.approx(-15.6337, 1.0e-4)
def test__noise_map__with_and_without_hyper_background(
masked_imaging_7x7_no_blur):
g0 = al.Galaxy(redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d_value=1.0))
tracer = al.Tracer.from_galaxies(galaxies=[g0])
fit = al.FitImaging(
dataset=masked_imaging_7x7_no_blur,
tracer=tracer,
settings_inversion=al.SettingsInversion(use_w_tilde=False),
)
assert fit.noise_map.slim == pytest.approx(
np.full(fill_value=2.0, shape=(9, )), 1.0e-1)
hyper_background_noise = al.hyper_data.HyperBackgroundNoise(
noise_scale=1.0)
fit = al.FitImaging(
dataset=masked_imaging_7x7_no_blur,
tracer=tracer,
hyper_background_noise=hyper_background_noise,
settings_inversion=al.SettingsInversion(use_w_tilde=False),
)
assert fit.noise_map.slim == pytest.approx(
np.full(fill_value=3.0, shape=(9, )), 1.0e-1)
assert fit.log_likelihood == pytest.approx(-18.1579, 1.0e-4)
def test__noise_map__with_and_without_hyper_galaxy(masked_imaging_7x7_no_blur):
g0 = al.Galaxy(redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d_value=1.0))
tracer = al.Tracer.from_galaxies(galaxies=[g0])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert fit.noise_map.slim == pytest.approx(
np.full(fill_value=2.0, shape=(9, )), 1.0e-1)
hyper_image = al.Array2D.ones(shape_native=(3, 3), pixel_scales=1.0)
g0 = al.Galaxy(
redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d_value=1.0),
hyper_galaxy=al.HyperGalaxy(contribution_factor=1.0,
noise_factor=1.0,
noise_power=1.0),
hyper_model_image=hyper_image,
hyper_galaxy_image=hyper_image,
hyper_minimum_value=0.0,
)
tracer = al.Tracer.from_galaxies(galaxies=[g0])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert fit.noise_map.slim == pytest.approx(
np.full(fill_value=4.0, shape=(9, )), 1.0e-1)
assert fit.log_likelihood == pytest.approx(-20.7470, 1.0e-4)
def test__total_mappers(masked_imaging_7x7):
g0 = al.Galaxy(redshift=0.5)
g1 = al.Galaxy(redshift=1.0)
g2 = al.Galaxy(redshift=2.0)
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1, g2])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert fit.total_mappers == 0
g2 = al.Galaxy(
redshift=2.0,
pixelization=al.pix.Rectangular(),
regularization=al.reg.Constant(),
)
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1, g2])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert fit.total_mappers == 1
g0 = al.Galaxy(
redshift=0.5,
pixelization=al.pix.Rectangular(),
regularization=al.reg.Constant(),
)
g1 = al.Galaxy(
redshift=1.0,
pixelization=al.pix.Rectangular(),
regularization=al.reg.Constant(),
)
g2 = al.Galaxy(
redshift=2.0,
pixelization=al.pix.Rectangular(),
regularization=al.reg.Constant(),
)
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1, g2])
fit = al.FitImaging(
dataset=masked_imaging_7x7,
tracer=tracer,
settings_inversion=al.SettingsInversion(use_w_tilde=False),
)
assert fit.total_mappers == 3
def test__fit_figure_of_merit(masked_imaging_7x7):
g0 = al.Galaxy(
redshift=0.5,
light_profile=al.lp.EllSersic(intensity=1.0),
mass_profile=al.mp.SphIsothermal(einstein_radius=1.0),
)
g1 = al.Galaxy(redshift=1.0, light_profile=al.lp.EllSersic(intensity=1.0))
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert (fit.image == np.full(fill_value=1.0, shape=(9, ))).all()
assert (fit.noise_map == np.full(fill_value=2.0, shape=(9, ))).all()
assert fit.log_likelihood == pytest.approx(-1168351.9731, 1e-4)
assert fit.figure_of_merit == pytest.approx(-1168351.9731, 1.0e-4)
pix = al.pix.Rectangular(shape=(3, 3))
reg = al.reg.Constant(coefficient=1.0)
g0 = al.Galaxy(redshift=0.5, pixelization=pix, regularization=reg)
tracer = al.Tracer.from_galaxies(galaxies=[al.Galaxy(redshift=0.5), g0])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert (fit.image == np.full(fill_value=1.0, shape=(9, ))).all()
assert (fit.noise_map == np.full(fill_value=2.0, shape=(9, ))).all()
assert fit.log_evidence == pytest.approx(-22.90055, 1e-4)
assert fit.figure_of_merit == pytest.approx(-22.90055, 1.0e-4)
galaxy_light = al.Galaxy(redshift=0.5,
light_profile=al.lp.EllSersic(intensity=1.0))
pix = al.pix.Rectangular(shape=(3, 3))
reg = al.reg.Constant(coefficient=1.0)
galaxy_pix = al.Galaxy(redshift=1.0, pixelization=pix, regularization=reg)
tracer = al.Tracer.from_galaxies(galaxies=[galaxy_light, galaxy_pix])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert (fit.image == np.full(fill_value=1.0, shape=(9, ))).all()
assert (fit.noise_map == np.full(fill_value=2.0, shape=(9, ))).all()
assert fit.log_evidence == pytest.approx(-37667.0303, 1e-4)
assert fit.figure_of_merit == pytest.approx(-37667.0303, 1.0e-4)
def test__figure_of_merit__includes_hyper_image_and_noise__matches_fit(
self, masked_imaging_7x7):
hyper_image_sky = al.hyper_data.HyperImageSky(sky_scale=1.0)
hyper_background_noise = al.hyper_data.HyperBackgroundNoise(
noise_scale=1.0)
lens_galaxy = al.Galaxy(redshift=0.5,
light=al.lp.EllSersic(intensity=0.1))
model = af.Collection(
hyper_image_sky=hyper_image_sky,
hyper_background_noise=hyper_background_noise,
galaxies=af.Collection(lens=lens_galaxy),
)
analysis = al.AnalysisImaging(dataset=masked_imaging_7x7)
instance = model.instance_from_unit_vector([])
analysis_log_likelihood = analysis.log_likelihood_function(
instance=instance)
tracer = analysis.tracer_for_instance(instance=instance)
fit = al.FitImaging(
dataset=masked_imaging_7x7,
tracer=tracer,
hyper_image_sky=hyper_image_sky,
hyper_background_noise=hyper_background_noise,
)
assert fit.log_likelihood == analysis_log_likelihood
def test__figure_of_merit__matches_correct_fit_given_galaxy_profiles(
self, imaging_7x7, mask_7x7):
lens_galaxy = al.Galaxy(redshift=0.5,
light=al.lp.EllipticalSersic(intensity=0.1))
phase_imaging_7x7 = al.PhaseImaging(
galaxies=dict(lens=lens_galaxy),
settings=al.SettingsPhaseImaging(
settings_masked_imaging=al.SettingsMaskedImaging(sub_size=1)),
search=mock.MockSearch(),
)
analysis = phase_imaging_7x7.make_analysis(dataset=imaging_7x7,
mask=mask_7x7,
results=mock.MockResults())
instance = phase_imaging_7x7.model.instance_from_unit_vector([])
fit_figure_of_merit = analysis.log_likelihood_function(
instance=instance)
masked_imaging = al.MaskedImaging(
imaging=imaging_7x7,
mask=mask_7x7,
settings=al.SettingsMaskedImaging(sub_size=1),
)
tracer = analysis.tracer_for_instance(instance=instance)
fit = al.FitImaging(masked_imaging=masked_imaging, tracer=tracer)
assert fit.log_likelihood == fit_figure_of_merit
def make_fit_imaging_generator(fit):
imaging = make_imaging_gen(fit=fit)
tracer = al.Tracer.from_galaxies(galaxies=fit.instance.galaxies)
return al.FitImaging(dataset=imaging, tracer=tracer)
def test___unmasked_blurred_images(masked_imaging_7x7):
g0 = al.Galaxy(
redshift=0.5,
light_profile=al.lp.EllSersic(intensity=1.0),
mass_profile=al.mp.SphIsothermal(einstein_radius=1.0),
)
g1 = al.Galaxy(redshift=1.0, light_profile=al.lp.EllSersic(intensity=1.0))
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
blurred_images_of_planes = tracer.blurred_image_2d_list_via_convolver_from(
grid=masked_imaging_7x7.grid,
convolver=masked_imaging_7x7.convolver,
blurring_grid=masked_imaging_7x7.blurring_grid,
)
unmasked_blurred_image = tracer.unmasked_blurred_image_2d_via_psf_from(
grid=masked_imaging_7x7.grid, psf=masked_imaging_7x7.psf)
assert (fit.unmasked_blurred_image == unmasked_blurred_image).all()
unmasked_blurred_image_of_planes_list = tracer.unmasked_blurred_image_2d_list_via_psf_from(
grid=masked_imaging_7x7.grid, psf=masked_imaging_7x7.psf)
assert (unmasked_blurred_image_of_planes_list[0] ==
fit.unmasked_blurred_image_of_planes_list[0]).all()
assert (unmasked_blurred_image_of_planes_list[1] ==
fit.unmasked_blurred_image_of_planes_list[1]).all()
def test__model_images_of_planes_list(masked_imaging_7x7):
g0 = al.Galaxy(
redshift=0.5,
light_profile=al.lp.EllSersic(intensity=1.0),
mass_profile=al.mp.SphIsothermal(einstein_radius=1.0),
)
g1_linear = al.Galaxy(redshift=0.75,
light_profile=al.lp_linear.EllSersic())
pix = al.pix.Rectangular(shape=(3, 3))
reg = al.reg.Constant(coefficient=1.0)
galaxy_pix_0 = al.Galaxy(redshift=1.0,
pixelization=pix,
regularization=reg)
galaxy_pix_1 = al.Galaxy(redshift=1.0,
pixelization=pix,
regularization=reg)
tracer = al.Tracer.from_galaxies(
galaxies=[g0, g1_linear, galaxy_pix_0, galaxy_pix_1])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert fit.model_images_of_planes_list[0] == pytest.approx(
fit.galaxy_model_image_dict[g0], 1.0e-4)
assert fit.model_images_of_planes_list[1] == pytest.approx(
fit.galaxy_model_image_dict[g1_linear], 1.0e-4)
assert fit.model_images_of_planes_list[2] == pytest.approx(
fit.galaxy_model_image_dict[galaxy_pix_0] +
fit.galaxy_model_image_dict[galaxy_pix_1],
1.0e-4,
)
def perform_fit_with_source_galaxy(imaging, source_galaxy):
mask = al.Mask2D.circular_annular(
shape_native=imaging.shape_native,
pixel_scales=imaging.pixel_scales,
inner_radius=0.3,
outer_radius=2.6,
)
imaging = imaging.apply_mask(mask=mask)
lens_galaxy = al.Galaxy(
redshift=0.5,
mass=al.mp.EllIsothermal(
centre=(0.0, 0.0),
einstein_radius=1.6,
elliptical_comps=al.convert.elliptical_comps_from(
axis_ratio=0.9, angle=45.0
),
),
shear=al.mp.ExternalShear(elliptical_comps=(0.05, 0.05)),
)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
return al.FitImaging(dataset=imaging, tracer=tracer)
def perform_fit_x2_lenses_with_source_galaxy_mask_and_border(
imaging, source_galaxy, mask, settings_pixelization):
imaging = imaging.apply_mask(mask=mask)
lens_galaxy_0 = al.Galaxy(
redshift=0.5,
mass=al.mp.EllIsothermal(centre=(1.1, 0.51),
elliptical_comps=(0.0, 0.15),
einstein_radius=1.07),
)
lens_galaxy_1 = al.Galaxy(
redshift=0.5,
mass=al.mp.EllIsothermal(centre=(-0.20, -0.35),
elliptical_comps=(0.06, 0.1053),
einstein_radius=0.71),
)
tracer = al.Tracer.from_galaxies(
galaxies=[lens_galaxy_0, lens_galaxy_1, source_galaxy])
return al.FitImaging(dataset=imaging,
tracer=tracer,
settings_pixelization=settings_pixelization)
def fit_imaging_from_agg_obj(
agg_obj: af.SearchOutput,
settings_imaging: al.SettingsImaging = None,
settings_pixelization: al.SettingsPixelization = None,
settings_inversion: al.SettingsInversion = None,
) -> "al.FitImaging":
"""
Returns a `FitImaging` object from an aggregator's `SearchOutput` class, which we call an 'agg_obj' to describe
that it acts as the aggregator object for one result in the `Aggregator`. This uses the aggregator's generator
outputs such that the function can use the `Aggregator`'s map function to to create a `FitImaging` generator.
The `FitImaging` is created.
Parameters
----------
agg_obj : af.SearchOutput
A PyAutoFit aggregator's SearchOutput object containing the generators of the results of PyAutoLens model-fits.
"""
imaging = imaging_from_agg_obj(agg_obj=agg_obj,
settings_imaging=settings_imaging)
tracer = tracer_from_agg_obj(agg_obj=agg_obj)
if settings_pixelization is None:
settings_pixelization = agg_obj.settings_pixelization
if settings_inversion is None:
settings_inversion = agg_obj.settings_inversion
return al.FitImaging(
imaging=imaging,
tracer=tracer,
settings_pixelization=settings_pixelization,
settings_inversion=settings_inversion,
)
def fit_with_offset_centre(centre):
mask = al.Mask2D.elliptical(
shape_2d=imaging.shape_2d,
pixel_scales=imaging.pixel_scales,
major_axis_radius=3.0,
axis_ratio=1.0,
phi=0.0,
centre=centre,
)
# The lines of code below do everything we're used to, that is, setup an image and its grid, mask it, trace it
# via a tracer, setup the rectangular mapper, etc.
lens_galaxy = al.Galaxy(
redshift=0.5,
mass=al.mp.EllipticalIsothermal(centre=(2.0, 2.0),
einstein_radius=1.2,
elliptical_comps=(0.17647, 0.0)),
)
source_galaxy = al.Galaxy(
redshift=1.0,
pixelization=al.pix.VoronoiMagnification(shape=(20, 20)),
regularization=al.reg.Constant(coefficient=1.0),
)
masked_imaging = al.MaskedImaging(imaging=imaging, mask=mask)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
fit = al.FitImaging(masked_imaging=masked_imaging, tracer=tracer)
return fit
def perform_fit_with_source_galaxy(imaging, source_galaxy):
mask = al.Mask.circular_annular(
shape_2d=imaging.shape_2d,
pixel_scales=imaging.pixel_scales,
sub_size=2,
inner_radius=0.3,
outer_radius=2.6,
)
masked_imaging = al.MaskedImaging(
imaging=imaging,
mask=mask,
settings=al.SettingsMaskedImaging(sub_size=2))
lens_galaxy = al.Galaxy(
redshift=0.5,
mass=al.mp.EllipticalIsothermal(centre=(0.0, 0.0),
elliptical_comps=(0.1, 0.0),
einstein_radius=1.6),
)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
return al.FitImaging(masked_imaging=masked_imaging, tracer=tracer)
def fit_imaging_from_agg_obj(
agg_obj,
settings_masked_imaging=None,
settings_pixelization=None,
settings_inversion=None,
):
"""Compute a *FitImaging* object from an aggregator's *PhaseOutput* class, which we call an 'agg_obj' to describe
that it acts as the aggregator object for one result in the *Aggregator*. This uses the aggregator's generator
outputs such that the function can use the *Aggregator*'s map function to to create a *FitImaging* generator.
The *FitImaging* is created following the same method as the PyAutoLens *Phase* classes.
Parameters
----------
agg_obj : af.PhaseOutput
A PyAutoFit aggregator's PhaseOutput object containing the generators of the results of PyAutoLens model-fits.
"""
masked_imaging = masked_imaging_from_agg_obj(
agg_obj=agg_obj, settings_masked_imaging=settings_masked_imaging)
tracer = tracer_from_agg_obj(agg_obj=agg_obj)
if settings_pixelization is None:
settings_pixelization = agg_obj.settings.settings_pixelization
if settings_inversion is None:
settings_inversion = agg_obj.settings.settings_inversion
return al.FitImaging(
masked_imaging=masked_imaging,
tracer=tracer,
settings_pixelization=settings_pixelization,
settings_inversion=settings_inversion,
)
def fit_imaging_with_lens_and_source_galaxy(imaging, lens_galaxy, source_galaxy):
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
return al.FitImaging(
dataset=imaging,
tracer=tracer,
settings_inversion=al.SettingsInversion(use_w_tilde=False),
)
def make_fit_generator(agg_obj):
samples = agg_obj.samples
imaging = agg_obj.dataset
tracer = al.Tracer.from_galaxies(
galaxies=samples.max_log_likelihood_instance.galaxies)
return al.FitImaging(imaging=imaging, tracer=tracer)
def test__uses_hyper_fit_correctly(self, masked_imaging_7x7):
galaxies = af.ModelInstance()
galaxies.lens = al.Galaxy(redshift=0.5,
light=al.lp.EllSersic(intensity=1.0),
mass=al.mp.SphIsothermal)
galaxies.source = al.Galaxy(redshift=1.0, light=al.lp.EllSersic())
instance = af.ModelInstance()
instance.galaxies = galaxies
lens_hyper_image = al.Array2D.ones(shape_native=(3, 3),
pixel_scales=0.1)
lens_hyper_image[4] = 10.0
hyper_model_image = al.Array2D.full(fill_value=0.5,
shape_native=(3, 3),
pixel_scales=0.1)
hyper_galaxy_image_path_dict = {("galaxies", "lens"): lens_hyper_image}
result = mock.MockResult(
hyper_galaxy_image_path_dict=hyper_galaxy_image_path_dict,
hyper_model_image=hyper_model_image,
)
analysis = al.AnalysisImaging(dataset=masked_imaging_7x7,
hyper_dataset_result=result)
hyper_galaxy = al.HyperGalaxy(contribution_factor=1.0,
noise_factor=1.0,
noise_power=1.0)
instance.galaxies.lens.hyper_galaxy = hyper_galaxy
analysis_log_likelihood = analysis.log_likelihood_function(
instance=instance)
g0 = al.Galaxy(
redshift=0.5,
light_profile=instance.galaxies.lens.light,
mass_profile=instance.galaxies.lens.mass,
hyper_galaxy=hyper_galaxy,
hyper_model_image=hyper_model_image,
hyper_galaxy_image=lens_hyper_image,
hyper_minimum_value=0.0,
)
g1 = al.Galaxy(redshift=1.0,
light_profile=instance.galaxies.source.light)
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1])
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert (fit.tracer.galaxies[0].hyper_galaxy_image == lens_hyper_image
).all()
assert analysis_log_likelihood == fit.log_likelihood
def test___stochastic_mode__gives_different_log_likelihoods(
masked_imaging_7x7):
pix = al.pix.VoronoiBrightnessImage(pixels=5)
reg = al.reg.Constant(coefficient=1.0)
g0 = al.Galaxy(
redshift=0.5,
pixelization=pix,
regularization=reg,
hyper_model_image=al.Array2D.ones(shape_native=(3, 3),
pixel_scales=1.0),
hyper_galaxy_image=al.Array2D.ones(shape_native=(3, 3),
pixel_scales=1.0),
)
tracer = al.Tracer.from_galaxies(galaxies=[al.Galaxy(redshift=0.5), g0])
fit_0 = al.FitImaging(
dataset=masked_imaging_7x7,
tracer=tracer,
settings_pixelization=al.SettingsPixelization(is_stochastic=False),
)
fit_1 = al.FitImaging(
dataset=masked_imaging_7x7,
tracer=tracer,
settings_pixelization=al.SettingsPixelization(is_stochastic=False),
)
assert fit_0.log_evidence == fit_1.log_evidence
fit_0 = al.FitImaging(
dataset=masked_imaging_7x7,
tracer=tracer,
settings_pixelization=al.SettingsPixelization(is_stochastic=True),
)
fit_1 = al.FitImaging(
dataset=masked_imaging_7x7,
tracer=tracer,
settings_pixelization=al.SettingsPixelization(is_stochastic=True),
)
assert fit_0.log_evidence != fit_1.log_evidence
def test__preloads__blurred_image_uses_preload_when_passed(
masked_imaging_7x7_no_blur):
g0 = al.Galaxy(redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d=np.ones(1)))
tracer = al.Tracer.from_galaxies(galaxies=[g0])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert (fit.blurred_image == np.array([1.0])).all()
blurred_image = np.array([2.0])
preloads = al.Preloads(blurred_image=blurred_image)
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur,
tracer=tracer,
preloads=preloads)
assert (fit.blurred_image == np.array([2.0])).all()
def test__model_image__with_and_without_psf_blurring(
masked_imaging_7x7_no_blur, masked_imaging_7x7):
g0 = al.Galaxy(
redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d_value=1.0,
image_2d_first_value=2.0),
)
tracer = al.Tracer.from_galaxies(galaxies=[g0])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert fit.model_image.slim == pytest.approx(
np.array([2.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]), 1.0e-4)
assert fit.log_likelihood == pytest.approx(-14.6337, 1.0e-4)
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert fit.model_image.slim == pytest.approx(
np.array([1.33, 1.16, 1.0, 1.16, 1.0, 1.0, 1.0, 1.0, 1.0]), 1.0e-1)
assert fit.log_likelihood == pytest.approx(-14.52960, 1.0e-4)
def test__subtracted_images_of_planes_list(masked_imaging_7x7_no_blur):
g0 = al.Galaxy(redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d=np.ones(1)))
g1 = al.Galaxy(redshift=0.75,
light_profile=al.m.MockLightProfile(image_2d=2.0 *
np.ones(1)))
g2 = al.Galaxy(redshift=1.0,
light_profile=al.m.MockLightProfile(image_2d=3.0 *
np.ones(1)))
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1, g2])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
fit.subtracted_images_of_planes_list # Fixes error where nan appears, weird.
assert fit.subtracted_images_of_planes_list[0].slim[0] == -4.0 or np.nan
assert fit.subtracted_images_of_planes_list[1].slim[0] == -3.0 or np.nan
assert fit.subtracted_images_of_planes_list[2].slim[0] == -2.0 or np.nan
g0 = al.Galaxy(redshift=0.5,
light_profile=al.m.MockLightProfile(image_2d=np.ones(1)))
g1 = al.Galaxy(redshift=1.0,
light_profile=al.m.MockLightProfile(image_2d=2.0 *
np.ones(1)))
g2 = al.Galaxy(redshift=1.0,
light_profile=al.m.MockLightProfile(image_2d=3.0 *
np.ones(1)))
tracer = al.Tracer.from_galaxies(galaxies=[g0, g1, g2])
fit = al.FitImaging(dataset=masked_imaging_7x7_no_blur, tracer=tracer)
assert fit.subtracted_images_of_planes_list[0].slim[0] == -4.0 or np.nan
assert fit.subtracted_images_of_planes_list[1].slim[0] == -0.0 or np.nan
def perform_fit_with_lens__source_galaxy(imaging, lens_galaxy, source_galaxy):
mask = al.Mask2D.circular_annular(
shape_native=imaging.shape_native,
pixel_scales=imaging.pixel_scales,
sub_size=1,
inner_radius=0.5,
outer_radius=2.2,
)
imaging = imaging.apply_mask(mask=mask)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
return al.FitImaging(dataset=imaging, tracer=tracer)
def make_fit_imaging_generator(fit):
imaging = make_imaging_gen(fit=fit)
settings_pixelization = fit.value(name="settings_pixelization")
settings_inversion = fit.value(name="settings_inversion")
tracer = al.Tracer.from_galaxies(galaxies=fit.instance.galaxies)
return al.FitImaging(
dataset=imaging,
tracer=tracer,
settings_pixelization=settings_pixelization,
settings_inversion=settings_inversion,
)
def fit_imaging_with_source_galaxy(imaging, source_galaxy):
lens_galaxy = al.Galaxy(
redshift=0.5,
mass=al.mp.EllIsothermal(
centre=(0.0, 0.0),
einstein_radius=1.6,
elliptical_comps=al.convert.elliptical_comps_from(axis_ratio=0.9,
angle=45.0),
),
shear=al.mp.ExternalShear(elliptical_comps=(0.05, 0.05)),
)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
return al.FitImaging(dataset=imaging, tracer=tracer)
def test__figure_of_merit__matches_correct_fit_given_galaxy_profiles(
masked_imaging_7x7):
lens = al.Galaxy(redshift=0.5, light=al.lp.EllSersic(intensity=0.1))
model = af.Collection(galaxies=af.Collection(lens=lens))
analysis = al.AnalysisImaging(dataset=masked_imaging_7x7)
instance = model.instance_from_unit_vector([])
analysis_log_likelihood = analysis.log_likelihood_function(
instance=instance)
tracer = analysis.tracer_via_instance_from(instance=instance)
fit = al.FitImaging(dataset=masked_imaging_7x7, tracer=tracer)
assert fit.log_likelihood == analysis_log_likelihood
def make_fit_generator(agg_obj):
samples = agg_obj.samples
imaging = agg_obj.dataset
settings_pixelization = agg_obj.settings_pixelization
settings_inversion = agg_obj.settings_inversion
tracer = al.Tracer.from_galaxies(
galaxies=samples.max_log_likelihood_instance.galaxies)
return al.FitImaging(
imaging=imaging,
tracer=tracer,
settings_pixelization=settings_pixelization,
settings_inversion=settings_inversion,
)
def perform_fit_with_lens__source_galaxy(imaging, lens_galaxy, source_galaxy):
mask = al.Mask.circular_annular(
shape_2d=imaging.shape_2d,
pixel_scales=imaging.pixel_scales,
sub_size=2,
inner_radius=0.5,
outer_radius=2.2,
)
masked_imaging = al.MaskedImaging(
imaging=imaging, mask=mask, settings=al.SettingsMaskedImaging(sub_size=2)
)
tracer = al.Tracer.from_galaxies(galaxies=[lens_galaxy, source_galaxy])
return al.FitImaging(masked_imaging=masked_imaging, tracer=tracer)