boxed_moments

Contents

boxed_moments#

scarlet2.init.boxed_moments(obs, center, footprint=None, bbox=None)[source]#

Measure 2nd moments of the observation in the region of the bounding box

The methods cuts out the pixel included in bbox or in footprint, measures their 2nd moments with respect to center, adjust the spatial coordinates and the PSF to match the model frame.

Parameters:

  • obs (Observation) – The Observation instance to derive moments from

  • center (tuple) – central pixel of the source

  • footprint (array, optional) – 2D image with non-zero values for all pixels associated with this source (aka a segmentation map or footprint)

  • bbox (BBox, optional) – box to cut out source from observation, in pixel coordinates

Returns:

2nd moments, corrected to match the model frame

Return type:

Moments

Raises:

AssertionError – If neither bbox or footprint are set

Contents