IM.js

IM.js uses JavaScript and the HTML5 canvas utility to perform this task, taking each images' pixels and comparing it to the other images' pixels from the same position on the canvas.

After all images are compared, IM.js will return a percentage of how similar these images are to each other.

By using this pixel-by-pixel approach, comparing takes more time than the classic method of verifying their sizes, MD5 or base64 strings, but there's an upside in the form of more highly accurate results.

A few examples are included with the IM.js download package. Usage instructions are provided with the package's README file.

What is new in this release:

• Refactored to reduce final size.

Requirements:

• JavaScript enabled on client side
• HTML 5 canvas enabled browser