I recently had a situation in which I wanted to generate thumbnail images and have them constrained to 67x50 (specifically “67x50>”). No problem so far, but I also wanted to auto rotate (via Imagemagick’s -auto-orient option) the images as they all come from a digital camera that provides this information. This causes a problem. Namely that some images ended up being 50x67 instead of 67x50. Here is my solution.