best_box_moments

best_box_moments#

scarlet2.init.best_box_moments(obs, center_pix, sizes=[11, 17, 25, 35, 47, 61, 77], min_snr=3, min_corr=0.99)[source]#

Make a bounding box for source at center

This method finds small box around the center so that the edge flux has a minimum SNR, the color of the edge pixels remains highly correlated to the center pixel color, and the flux in all channels is lower than with the last acceptable box size. This should effectively isolate the source against the noise background and neighboring objects.

Parameters:

  • obs (Observation) – The Observation instance to use when defining the bounding box.

  • center_pix (tuple) – source center, in pixel coordinates

  • sizes (list[int]) – a list of box sizes to cycle through

  • min_snr (float) – minimum SNR of edge pixels (aggregated over all observation channel) to allow increase of box size

  • min_corr (float) – minimum correlation coefficient between center and edge color to allow increase of box size

Return type:

Box, Moments

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