You don't have to test it against anti-Putin memes to see if it would work for anti-Putin memes. Algoritm would be something like: 1. Have image 2. Get hash o

You don't have to test it against anti-Putin memes to see if it would work for anti-Putin memes. Algoritm would be something like: 1. Have image 2. Get hash of image 3. Get another hash from another similar image 4. Compare hashes The images themselves can be of whatever to see if it works as expected, they don't have to contain anti-Putin memes.