Fast Thumbnails from Raws

February 17th 2021

I use cloud storage for my work-related photography. I make a folder of thumbnails of all the raw images from each shoot so that I don’t have to download gigs of raws to look back through the photos, just a few tens of megs of thumbnail jpegs.

This is by far the fastest way I’ve found to generate a set of thumbnails for raw photos. dcraw doesn’t actually decode the raw for this it just extracts the thumbnail that’s embedded in the raw. ImageMacik’s mogrify resizes the images, tweaks the brightness/contrast/color a bit and saves it down.