SQP

SQP (Squishy Picture) is a simple image format designed for ease of encoding and decoding while maintaining a relatively good compression ratio for various purposes. The general idea is to make something "good enough" while being simple.

This reference implementation fits in under 1000 lines of relatively simple Rust, while maintaining decent compression and decompression speeds.

Additionally, it also supports both lossless and lossy encoding schemes, with the lossy version using Discrete Cosine Transform encoding like JPEG.