Science Score: 67.0%
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Found 4 DOI reference(s) in README -
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○Scientific vocabulary similarity
Low similarity (16.0%) to scientific vocabulary
Keywords
Repository
hyperspectral galaxy modeling and deblending
Basic Info
Statistics
- Stars: 54
- Watchers: 9
- Forks: 21
- Open Issues: 33
- Releases: 0
Topics
Metadata Files
README.md
Scarlet
This package performs source separation (aka "deblending") on multi-band images. It's geared towards optical astronomy, where scenes are composed of stars and galaxies, but it is straightforward to apply it to other imaging data.
For the full documentation see the docs.
Separation is achieved through a constrained matrix factorization, which models each source with a Spectral Energy Distribution (SED) and a non-parametric morphology, or multiple such components per source. In astronomy jargon, the code performs forced photometry (with PSF matching if needed) using an optimal weight function given by the signal-to-noise weighted morphology across bands. The approach works well if the sources in the scene have different colors and can be further strengthened by imposing various additional constraints/priors on each source.
The minimization itself uses the proximal gradient method (PGM). In short, we iteratively compute gradients of the likelihood (or of the posterior if priors are included), perform a downhill step, and project the outcome on a sub-manifold that satisfies one or multiple non-differentiable constraints for any of the sources.
This package provides a stand-alone implementation that contains the core components of the source separation algorithm. However, the development of this package is part of the LSST Science Pipeline; the meas_deblender package contains a wrapper to implement the algorithms here for the LSST stack.
The API is reasonably stable, but feel free to contact the authors fred3m and pmelchior for guidance. For bug reports and feature request, open an issue.
If you make use of scarlet, please acknowledge Melchior et al. (2018), which describes in detail the concepts and algorithms used in this package.
Prerequisites
The code runs on python>=3.5. In addition, you'll need
- numpy
- pybind11
- autograd
- proxmin
Owner
- Name: Peter Melchior
- Login: pmelchior
- Kind: user
- Location: Princeton, NJ, USA
- Company: Princeton University
- Website: http://pmelchior.net
- Twitter: peter_melchior
- Repositories: 16
- Profile: https://github.com/pmelchior
Asst. Prof. of Statistical Astronomy
Citation (CITATION.cff)
cff-version: 1.2.0
message: "If you use this software, please cite it as below."
authors:
- family-names: "Melchior"
given-names: "Peter"
orcid: "https://orcid.org/0000-0002-8873-5065"
- family-names: "Moolekamp"
given-names: "Fred"
orcid: "https://orcid.org/0000-0003-0093-4279"
- family-names: "Moolekamp"
given-names: "Fred"
orcid: "https://orcid.org/0000-0003-0093-4279"
title: "scarlet"
url: "https://github.com/pmelchior/scarlet/"
preferred-citation:
type: article
authors:
- family-names: "Melchior"
given-names: "Peter"
orcid: "https://orcid.org/0000-0002-8873-5065"
- family-names: "Moolekamp"
given-names: "Fred"
orcid: "https://orcid.org/0000-0003-0093-4279"
- family-names: "Jerdee"
given-names: "Maximilian"
- family-names: "Armstrong"
given-names: "Robert"
orcid: "https://orcid.org/0000-0002-6911-1038"
- family-names: "Sun"
given-names: "Ai-Lei"
orcid: "https://orcid.org/0000-0001-6913-9471"
- family-names: "Bosch"
given-names: "James"
orcid: "https://orcid.org/0000-0003-2759-5764"
- family-names: "Lupton"
given-names: "Robert"
orcid: "https://orcid.org/0000-0003-1666-0962"
doi: "10.1016/j.ascom.2018.07.001"
journal: "Astronomy and Computing"
volume: 24
start: 129 # First page number
end: 142 # Last page number
title: "SCARLET: Source separation in multi-band images by Constrained Matrix Factorization"
year: 2018
month: 7
GitHub Events
Total
- Issues event: 3
- Watch event: 3
Last Year
- Issues event: 3
- Watch event: 3
Issues and Pull Requests
Last synced: 6 months ago
All Time
- Total issues: 2
- Total pull requests: 0
- Average time to close issues: about 1 hour
- Average time to close pull requests: N/A
- Total issue authors: 2
- Total pull request authors: 0
- Average comments per issue: 0.5
- Average comments per pull request: 0
- Merged pull requests: 0
- Bot issues: 0
- Bot pull requests: 0
Past Year
- Issues: 2
- Pull requests: 0
- Average time to close issues: about 1 hour
- Average time to close pull requests: N/A
- Issue authors: 2
- Pull request authors: 0
- Average comments per issue: 0.5
- Average comments per pull request: 0
- Merged pull requests: 0
- Bot issues: 0
- Bot pull requests: 0
Top Authors
Issue Authors
- esheldon (1)
- b-biswas (1)
- eramey16 (1)
- b-remy (1)
- charlotteaward (1)
- ismael-mendoza (1)
- rsav (1)
Pull Request Authors
- pmelchior (2)
- charlotteaward (1)
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Dependencies
- numpy *