I recently built a small image optimizer for macOS since ImageOptim is mostly abandonware now. Specifically for folks who dislike complex build tools for this job <a href="https://shiboru.com" rel="nofollow">https://shiboru.com</a>
I love image and video compression. For fun, I made my own and managed to squeeze an image of myself into byte level file sizes.<p>It's amazing to me how we much we can fill in the blanks to make something recognizable with such little data.
Most comprehensive write up of JPEG et al. I have ever come across.<p>I think the MozJPEG compression optimisations deserves a mention, as does where we started, with RLE encoding for printer things.<p>Also important for my personal understanding of JPEG is the context: slow CPUs and analogue screens. OG JPEG was optimised for this, MozJPEG changed the look up tables and the ubiquitous 'turbo' JPEG library to use a few more CPU cycles and save a few more bytes, whilst fixing the banding that was actually okay in the analogue days of old CRT monitors.<p>Bookmarked the article for re-reading.