tl;dr: A photographer realized their habit of taking many near-identical shots from slightly different angles had accidentally produced years of raw material for "wigglegrams" (stereoscopic GIF loops). They wrote a script using perceptual hashing and Hamming distance to scan their iCloud library, find clusters of similar images, and auto-stitch them into wigglegrams. The script is on GitHub and works with Mac iCloud libraries or any image directory.