dilated_region

psfsubtraction.fitpsf.dilated_region(self, region, indpsf)

Specify a optimization region that extends around the region.

This requires that the fitter has an attribute dilatation_region, which can be

• an int: In this case a square matrix of size 2 * n + 1 is used.
• a matrix (see scipy.ndimage.binary_dilation for details.

Examples

>>> from psfsubtraction.fitpsf import fitters
>>> from psfsubtraction.fitpsf import optregion
>>> region = np.array([[True, False, False],                            [False, False, False],                            [False, False, False]])
>>> class DilationFitter(fitters.SimpleSubtraction):
...     optregion = optregion.dilated_region
...     dilation_region = 1
>>> dummy_image = np.ones((3, 3)) # boring image, but good enough for the example
>>> dummy_psfs = np.ones((3,3,4)) # even more boring psf array.
>>> myfitter = DilationFitter(dummy_psfs, dummy_image)
>>> myfitter.optregion(region, [0]).reshape((3, 3))
array([[ True,  True, False],
       [ True,  True, False],
       [False, False, False]])