I've been using Reddit's smart cropping code[0], which just uses histograms to achieve a similar effect. If you're looking to crop to a thumbnail size it's orde

I've been using Reddit's smart cropping code[0], which just uses histograms to achieve a similar effect. If you're looking to crop to a thumbnail size it's orders of magnitude more efficient, while avoiding bad cropping on images where the interesting content is off-centre. [0] https://github.com/reddit/reddit/blob/e152ff6ad9260d243a8d4e28d9512fb94cd73348/r2/r2/lib/media.py#L87-L140 https://github.com/reddit/reddit/blob/e152ff6ad9260d243a8d4e...