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add catalog option to make_model_image #2044

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add catalog option to make_model_image #2044

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15 changes: 11 additions & 4 deletions photutils/psf/photometry.py
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Original file line number Diff line number Diff line change
Expand Up @@ -42,10 +42,10 @@ class ModelImageMixin:
residuals.
"""

def make_model_image(self, shape, psf_shape=None, include_localbkg=False):
def make_model_image(self, shape, psf_shape=None, include_localbkg=False, model_params=None):
"""
Create a 2D image from the fit PSF models and optional local
background.
Create a 2D image from the fit PSF models or a provided catalog
and optional local background.

Parameters
----------
Expand All @@ -68,6 +68,12 @@ def make_model_image(self, shape, psf_shape=None, include_localbkg=False):
sources overlap will have the local background added
multiple times.

model_params : `~astropy.table.Table`, optional
A table of objects to simulate using the PSF model.
The table must contain columns that match those output
of fitting, typically `x_0`, `y_0`, and `flux`.
If `None`, the most recent fit will be used.

Returns
-------
array : 2D `~numpy.ndarray`
Expand Down Expand Up @@ -102,7 +108,8 @@ def make_model_image(self, shape, psf_shape=None, include_localbkg=False):
fit_params = self.fit_results[-1]._fit_model_params
local_bkgs = self.fit_results[-1].init_params['local_bkg']

model_params = fit_params
if model_params is None:
model_params = fit_params

if include_localbkg:
# add local_bkg
Expand Down
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