GaussianMorphology#

class scarlet2.GaussianMorphology(size, ellipticity=None, shape=None)[source]#

Bases: ProfileMorphology

Gaussian radial profile

__call__(delta_center=Array([0., 0.], dtype=float32))[source]#: Evaluate the model

ellipticity: (None, <function array at 0x7fe56388e8e0>)#: Ellipticity of the profile

f(r2)[source]#

Radial profile function

Parameters:: r2 (float or array) – Radius (distance from the center) squared

static from_image(image)[source]#

Create Gaussian radial profile from the 2nd moments of image

Parameters:: image (array) – 2D array to measure Moments from.
Return type:: GaussianMorphology

static from_moments(g, shape=None)[source]#

Create Gaussian radial profile from the moments g

Parameters:

g (Moments) – Moments, order >= 2
shape (tuple) – Shape of the bounding box

Return type:

GaussianMorphology

get(name=None)#

Get parameter(s) from this module

Parameters:: name (str, optional) – Name of parameter. If not set, returns all parameters.
Returns:: requested data arrays for parameters
Return type:: dict

property parameters#

Parameters defined for this module

Returns:: name: (node, param) mapping for all parameters
Return type:: dict

replace(name, value)#

Replace member attribuge name with value

Parameters:

name (str) – Name of member to replace
value (any) – Value to replace member with

Returns:

The modified module.

Return type:

Module

replace_subtree(where, value, parameters=None)#

Replace the subtree where(self) with value and carry over all other parameters

Unlike replace(), value does not need to have the same structure as the subtree it replaces, e.g. an array morphology can be replaced by a SersicMorphology. Parameters defined for this module remain attached to the same nodes, except those inside the replaced subtree, which are dropped.

Parameters:

where (callable) – Function module -> node that selects the subtree to replace, as in equinox.tree_at()
value (any) – Replacement for the subtree. If this module has a frame, attributes of value given in sky coordinates are converted to pixel coordinates of that frame.
parameters (callable, optional) – Function module -> None that is called with the new module inside of a Parameters context to define parameters for the replacement, e.g. by calling Parameter on nodes of value.

Returns:

The modified module.

Return type:

Module

Examples

>>> sersic = SersicMorphology(n=jnp.array(2.), size=jnp.array(2.), shape=morph.shape)
>>> def sersic_parameters(morph):
>>>     Parameter(morph.n, name="n:0", prior=dist.Uniform(0.5, 6))
>>>     Parameter(morph.size, name="size:0", constraint=constraints.positive, stepsize=0.1)
>>>
>>> scene_ = scene.replace_subtree(lambda sc: sc.sources[0].morphology, sersic, sersic_parameters)

GaussianMorphology

Contents

GaussianMorphology#