Readers with previous backgrounds in cryptography or file verification (i.e., checksums) may wonder why we cannot use md5, sha-1, etc. The problem here lies in the very … See more

The image hashing algorithm we will be implementing for this blog post is called difference hashing or simply dHashfor short. I first remember reading about dHash on the Hac… See more

My implementation of image hashing and difference hashing is inspired by the imagehash library on GitHub, but tweaked to (1) use OpenCV instead of PIL and (2) correctly (i… See more

To see our image hashing algorithm in action, scroll down to the “Downloads”section of this tutorial and then download the source code + example image data… See more

If you’re interested in learning more about image hashing, I would suggest you first take a look at the imagehashing GitHub repo, a popular (PIL-based) Python library used for pe… See more