PHash is a library for generating perceptual hashes of media files. These bindings currently only support images. You can compare these hashes to detect visually similar images.
Note that this library does not come bundled with the source code for pHash.
You must install that yourself. Your package manager may have it available as
libphash. If that is not available, you can install it from source from
http://phash.org.
import Data.PHash
main = do
Just h1 <- imageHash "somefile.jpg"
print h1
print =<< imagesSimilar "somefile.jpg" "similarfile.jpg" reasonableThreshold
where reasonableThreshold = 15All credit goes to the original pHash authors. For more information about pHash visit http://phash.org