colorUtilities.py

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# This file is part of meas_base.
#
# Developed for the LSST Data Management System.
# This product includes software developed by the LSST Project
# (https://www.lsst.org).
# See the COPYRIGHT file at the top-level directory of this distribution
# for details of code ownership.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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"""Color Utilities such as extracting color information.
"""
 
import numpy as np
from lsst.afw.image import Color
 
__all__ = (
    "colorExtractor",
)
 
 
def colorExtractor(record, columnNameValue="psf_color_value", columnNameType="psf_color_type"):
    try:
        c = record[columnNameValue]
        ct = record[columnNameType]
        if np.isfinite(c):
            color = Color(colorValue=c, colorType=ct)
        else:
            color = Color()
    except Exception:
        color = Color()
    return color