Formed in 2009, the Archive Team (not to be confused with the archive.org Archive-It Team) is a rogue archivist collective dedicated to saving copies of rapidly dying or deleted websites for the sake of history and digital heritage. The group is 100% composed of volunteers and interested parties, and has expanded into a large amount of related projects for saving online and digital history.
imgdiff
Faster than the fastest in the world pixel-by-pixel image difference tool.
Why?
imgdiff isn't as fast as a tool like this should be and I'm not proud of it, but it is 3X faster than the fastest in the world pixel-by-pixel image difference tool, so maybe you'll find it useful.
Features
It can do everything odiff can. Faster.
Benchmarks
I've tested it on Linux, Intel(R) Core(TM) i7-4700HQ CPU @ 2.40GHz, 8 cores.
Cypress image 3446 x 10728
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|---|---|---|---|---|
imgdiff images/cypress-1.png images/cypress-2.png output.png |
1.442 ± 0.012 | 1.420 | 1.462 | 1.00 |
odiff images/cypress-1.png images/cypress-2.png output.png |
6.475 ± 0.092 | 6.300 | 6.583 | 4.49 |
Water image 8400 x 4725
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|---|---|---|---|---|
imgdiff images/water-1.png images/water-2.png output.png |
1.908 ± 0.0058 | 1.841 | 2.002 | 1.00 |
odiff images/water-1.png images/water-2.png output.png |
6.016 ± 0.415 | 5.643 | 7.140 | 3.15 |
Usage
Usage: imgdiff [--threshold THRESHOLD] [--diff-image] [--fail-on-layout] BASE COMPARE OUTPUT
Positional arguments:
BASE Base image.
COMPARE Image to compare with.
OUTPUT Output image path.
Options:
--threshold THRESHOLD, -t THRESHOLD
Color difference threshold (from 0 to 1). Less more precise. [default: 0.1]
--diff-image Render image to the diff output instead of transparent background. [default: false]
--fail-on-layout Do not compare images and produce output if images layout is different. [default: false]
--help, -h display this help and exit
Download
You can find pre-built binaries here. imgdiff is written in Go, so there shouldn't be any troubles to compile it for the most of popular platforms.