clahe-rs

Reimplementation of opencv's CLAHE in pure rust. This includes implementing u16 -> u8 conversion which was missing in the other crates I tried.

Unlike the opencv version this:

• does not use threads (see future work, rayon could do this)
• does not do manual loop unrolls
• iterates over regions rather than lines during interpolation

Its unlikely this reaches the single-core throughput of the heavily optimized opencv version (though I tried to maintain the structure that makes it possible), if you are interested in making it faster let me know.

Examples

Before	After

Future work

• More performance testing
• Rayon threading
• Integrate into imageproc crate