Use your DSLR to detect cosmic rays! Read about it here
This repo is a very messy, there's a lot of ad hoc junk. Please don't hesitate to reach out if you have any questions, you can find my contacts here.
Procedure:
- Place all your raw images in some directory.
- Convert the images to PGM using dcraw, using
dcraw -4 -D ... - Create an output directory, the scripts will save some temporary files and the analysis data here.
- Set up
config.json. I included the config.json that I used in the repo as an example, you can just copy this and replace the paths with your own. - Run
first-pass.js, thenanalyze.js. This will identify anomalous pixels, cluster them, and produce a .CSV output. - You can render the cosmic rays using
extract-clusters.js. Make sure to create aclustersfolder in the output directory first.
My code depends on the sharp module for image output, which can be installed by running npm install from anywhere in the repo.
The colormap used for plotting is taken from ehtplot. It's the same one that the EHT's first black hole picture used :-)