Found this post on creating grayscale copies of all in a directory images using imagemagick. The method is pretty awesome. The command line code is (in case the post gets lost at some point):
Read More: Mass conversion to grayscale images
Below is a shell script to grayscale all gif images in a directory and save them as pngs using ImageMagick. I used this to convert all Moodle plugin icons to grayscale for Moodlerooms grayscale icon packs.
Read More: Grayscale All Images in a Directory With Imagemagick
Been working on icons for Moodlerooms mockups using Balsamiq and was pointed to http://somerandomdude.com/work/iconic/ by a response to a comment I made. Rather than reading the actual documentation after downloading the icons I looked for a way to convert the svg file to png files. I then found http://porpoisehead.net/mysw/index.php?pgid=gimp_svg, which now seems defunct. While for gimp 2.2 I figured out the changes I needed to make, mostly to the -b option to be –batch= and the –batch-interpreter=plug-in-script-fu-eval. I never did get the shell script to work but ended up just using the shell for command that I fixed. It looks like:
Read More: Gimp svg to png script