Raspberry Pi All Sky Camera with Raspicam

README.md

Here's what I do after image acquisition.

• Capture images with capture-loop.sh on Raspberry Pi
  • The raspberry pi is connected to my home network and is uncerimoniously thrown on the roof
  • It NFS mounts a disk inside, which is where the script lives and images get saved, so if an eagle flies off with it, I still have the data.
• Convert the images to grayscale
• Stretch them
• Remove the bright ones at the beginning and end0

ls o*.jpg > r.txt
vim r.txt 
for i in $(cat r.txt); do rm $i; done

• Convert remaining images to video.

capture-loop.sh

#!/usr/bin/env bash


while true
do
	dir="allskycam-mk1-$(date -I)"
	mkdir -p ${dir}
	raspistill -ex night -ss 10000000 -o ${dir}/img-$(date +%s).jpg
	sleep 10
done

gray-convert.sh

#!/usr/bin/env bash
# Convert color images to grayscale

for i in img-1*.jpg; do convert $i -colorspace Gray gray/$i; done

levels.sh

#!/usr/bin/env bash
# Stretch the images so the stars are visible
# Uses: http://www.fmwconcepts.com/imagemagick/levels/index.php

for i in *.jpg; do ~/Downloads/levels -i 0,15 ${i} o${i}; done

mkvid.sh

#!/usr/bin/env bash
# convert to video and gif

ffmpeg -r 10 -i oimg-%*.jpg -s 1280x1024 out.mp4
ffmpeg -r 10 -i oimg-%*.jpg -s 800x600 out.gif