A Rust library for calculating the similarity between two images.

List of metrics

• [x] Sum of Absolute Differences (SAD)
• [x] Mean of Absolute Differences (MAD)
• [x] Sum of Squared Differences (SSD)
• [x] Mean of Squared Error (MSE)
• [ ] Normalized Cross Correlation (NCC)
• [ ] Peak Signal to Noise Ratio (PSNR)
• [ ] Structural Similarity (SSIM)
• [ ] Multi-Scale Structural Similarity (MS-SSIM)
• [ ] Gradient Magnitude Similarity (GMSD)
• [ ] ...

Usage

toml [dependencies] image = "0.23.4"

rust let image_a = image::open("image_a.png").unwrap(); let image_b = image::open("image_b.png").unwrap(); let difference = similarity_sad(&image_a, &image_b);

Examples of results

| Image A | Image B | | --- | --- | | | | SAD¹: | 0 | MAD¹: | 0.0 | SSD¹: | 0 | MSE¹: | 0.0

| | | --- | --- | | SAD¹: | 13500834 | MAD¹: | 51.501595 | SSD¹: | 1179189332 | MSE¹: | 4498.2505

| | | --- | --- | | SAD¹: | 16662881 | MAD¹: | 63.563847 | SSD¹: | 1680929909 | MSE¹: | 6412.239

| | | --- | --- | | SAD¹: | 19903895 | MAD¹: | 75.92734 | SSD¹: | 1681425109 | MSE¹: | 6414.128

| | | --- | --- | | SAD¹: | 46021705 | MAD¹: | 175.55887 | SSD¹: | 9046268163 | MSE¹: | 34508.773

| | | --- | --- | | SAD¹: | 69718295 | MAD¹: | 265.9542 | SSD¹: | 20780685733 | MSE¹: | 79272.02

¹: The smaller the value, the more similar the images are. ²: The larger the value, the more similar the images are.