algol-bayer 2024.12.1

bayer-masked spectroscopic image reduction package

Capture, display and convert RAW DSLR astronomical images

This package was developed for astro-spectroscopic student projects at the Dresden Gönnsdorf observatory.

There are method to

• Capture DSLR raw images
• Display raw DSLR images and spectra
• Display fits images and spectra
• Dark and flat correction
• Debayer a 2d into a 3d fits file

Installation

apt-get install gphoto2
pip install algol-bayer

Capture DSLR raw images

Capture and display as histograms

Capture a sequence of DSLR raw images using increasing exposure times and display the images as histogram.

bayer_capture_histograms.sh

Capture and display as spectra

Capture a sequence of DSLR raw images and try to display them as spectra.

bayer_capture_sequence.sh 

Display raw DSLR images and spectra

Display raw DSLR image as histogram

bayer_display_histogram --help

Display raw DSLR image as spectrum

There is a published paper explaining how this works. It can be found online or in the docs/article folder.

bayer_display_spectrum --help

Display fits images and spectra

Display fits image as histogram

fits_display_histogram --help

Display fits image as spectrum

There is a published paper explaining how this works. It can be found online or in the docs/article folder.

fits_display_spectrum --help

Dark and flat correction

An example of how to do this can be found in tests/test_darkflat.py

Create master dark

... or a master-flat-dark from a set of dark images.

fits_create_master_dark --help

Create master flat

... from a master-flat-dark and a set of flat images.

fits_create_master_flat --help

Apply master dark and master flat to light images

fits_apply_darks_and_flats --help

Conversions

Debayer a 2d into a 3d fits file

fits_debayer --help

Links

• https://github.com/christianwbrock/algol-bayer
• http://gphoto.org/
• https://pypi.org/project/rawpy/