July 21, 2004

• A bash script which uses ImageMagick's composite command to add all jpegs in a directory together, leaving behind a trail of huge PNG files for later comparison.

  Yes, the previous iteration of this script was crap. Here's the updated version, for the edification of all:

  #!/bin/bash
  
  counter=1
  for image in *.JPG
   do
    if [ ! -e "output$counter.png" ] ; then
      echo "addimages: converting $image to output$counter.png"
      convert $image output$counter.png
    else
      # outputimage exists, so we can add to it
      let "newcounter = $counter + 1"
      echo "addimages: adding $image, output$newcounter.png"
      composite -compose Add $image output$counter.png output$newcounter.png
      let "counter=$newcounter"
    fi
  done

  • 6:07 pm
  • 2 Comments