image-compare

Simple image comparison in rust based on the image crate

Note that this crate is heavily work in progress. Algorithms are neither cross-checked not particularly fast yet. Everything is implemented in plain CPU with no SIMD or GPU usage.

Supported now: - Comparing grayscale images - By RMS - score is calculated by: $1-\sqrt{\frac{(\sum_{x,y=0}^{x,y=w,h}\left(f(x,y)-g(x,y)\right)^2)}{w*h}}$ - By MSSIM - SSIM is implemented as described on wikipedia: $\mathrm{SSIM}(x,y)={\frac {(2\mu _{x}\mu _{y} c_{1})(2\sigma _{xy} c_{2})}{(\mu _{x}^{2} \mu _{y}^{2} c_{1})(\sigma _{x}^{2} \sigma _{y}^{2} c_{2})}}$ - MSSIM is calculated by using 8x8 pixel windows for SSIM and averaging over the results

Planned: - Histogram comparisons for grayscale and colored images - SIMD for RMS and MSSIM