eblurhash - Blurhash for Erlang

This is an Erlang version of https://blurha.sh

With ImageMagick

Use the magick function to first let imagemagick resize (and secure) the image, before using the blurhash program to calculate the hash.

eblurhash:magick("path/to/image.jpg").

Return something like:

{ok, <<"MlMF%n00%#Mwo}S|WCWEM{a$R*bbWBbHfl">>}

Note: you will need to have ImageMagick installed

The magick command checks the image size and selects optimal X and Y size for the blurhash. Where X and Y are in the range 1..5.

The command line program convert is used to convert the image to a smaller gif file. This gif file is then provided to the blurhash program.

Using blurhash directly

This uses the C version of blurhash on the supplied image file.

The C version uses stb_image to load images, which is not security-hardened, so it is not recommended to use this version in production on untrusted data!

The blurhash command needs to have the X and Y arguments provided:

eblurhash:hash(5, 3, "path/to/image.jpg").

Returns {ok, <<"...">>} or {error, Reason}.