Side-by-side image viewer with synchronized zoom and sliding overlays. Drag and drop to instantly compare multiple images on your desktop. Very open source.

A tool to automate Visual Regression testing for Android , iOS and Web

Desktop app for aligning images using draggable control points (manual image registration). Batch mode to process multiple images such as XRF and RIS element maps from painting analyses. Converts and merges alphascale images. Installs as a Windows executable and runs directly on Python. Very open source.

Fast image comparing by hash, obtained by resizing and simplifying resized image pixel's colors

Comparing Faces in two pictures using Amazon Rekognition