Coverage for python/lsst/meas/extensions/scarlet/blend.py : 67%

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1# This file is part of meas_extensions_scarlet.
2#
3# Developed for the LSST Data Management System.
4# This product includes software developed by the LSST Project
5# (https://www.lsst.org).
6# See the COPYRIGHT file at the top-level directory of this distribution
7# for details of code ownership.
8#
9# This program is free software: you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation, either version 3 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program. If not, see <https://www.gnu.org/licenses/>.
22import numpy as np
24from scarlet.blend import Blend
26__all__ = ["LsstBlend", "checkBlendConvergence"]
29def checkBlendConvergence(blend, f_rel):
30 """Check whether or not a blend has converged
31 """
32 deltaLoss = np.abs(blend.loss[-2] - blend.loss[-1])
33 convergence = f_rel * np.abs(blend.loss[-1])
34 return deltaLoss < convergence
37class LsstBlend(Blend):
38 """LSST Blend of sources
40 It is possible that LSST blends might require different
41 funtionality than those in scarlet, which is being designed
42 for multiresolution blends. So this class exists for any
43 LSST specific changes.
44 """
45 pass