This is a perceptual image hash calculation tool based on algorithm descibed in Block Mean Value Based Image Perceptual Hashing by Bian Yang, Fan Gu and Xiamu Niu.

Blockhash requires libmagickwand. On Debian/Ubuntu it can be installed using the following command:

sudo apt-get install libmagickwand-dev

On Fedora and friends:

sudo dnf install ImageMagick-devel

To build blockhash cd to the source directory and type:

./waf configure
./waf

The program binary will land in ./build. To install it to /usr/local/bin/ type:

./waf install

Run blockhash [list of images] for calculating hashes.

Run blockhash --help for the list of options.

Copyright 2014 Commons Machinery http://commonsmachinery.se/

Distributed under an MIT license, please see LICENSE in the top dir.

Contact: dev@commonsmachinery.se