imgdiff - cli tool to calculate difference between images. Results are stable for next transformations: "scale-up/scale-down", color adjustment, quality reduce Returns % of difference

Thanks https://github.com/Nr90/imgsim/ for Average and Difference hash calculations

go get -u github.com/AskAlexSharov/imgdiff

imgdiff ./test-png-original.png ./test-png-damaged.png
Difference: 3%

Or you can use URL of image

imgdiff https://urloffile.com/file1.jpg https://urloffile.com/file2.jpg
Difference: 0% 

• JPEG
• PNG
• Local files and download from Url

imgdiff is MIT licensed