Perceptual hashing library in python (with redis)

Image Hashing using C# based on Python code

Go wavelet image hashing

A simple tool to compute image hashes as well as comparing images.

image hashing algorithms in nim

PhotoDNA is a robust technology developed by Microsoft to detect and prevent the spread of child sexual abuse material online. By creating digital signatures of known illegal images, PhotoDNA helps internet companies identify and remove harmful content quickly and efficiently.