20% faster

The Lab color space conversion requires a cube root (3× per pixel even), which is expensive to compute in a general case. Fortunately, the range required by Lab can be computed more efficiently.

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The zip has macOS and Windows binaries.

25% faster

• WASM compatibilty
• Performance improvements

3.2.0

Polyfill rayon in WASM

Latest build

Includes universal binary for M1 Macs

More accurate pooling algorithm

3.0.0

Update README

Major Rust rewrite

Complete rewrite of the project in Rust:

• Chroma channels are compared at full resolution. This increases accuracy on images with chroma subsampling.
• All scaling is done in linear-light premultiplied-alpha color space, which further increases accuracy.
• Safe and reliable code. No more dodgy pointer manipulation.

Important regression: only PNG files are supported, and they're assumed to always be in the sRGB color space. Please be very careful when converting/comparing images with color profiles, because differences from color profile (mis)interpretation are often very large and make DSSIM scores bogus.

1.3.3

• Fixed handling of PNG files with invalid chunks
• Fixed handling of color channels smaller than 8 pixels

1.3.2

• Error handling of invalid gamma
• Support reading stdin as - file

1.3.1

• Shows more digits of result
• Changed blur implementation