friday: A functionnal image processing library for Haskell.

[ graphics, lgpl, library ] [ Propose Tags ]

Friday provides functions to manipulate images in a functional way. The library is designed to be fast, generic and type-safe.

The library uses FFI calls to the DevIL image library to read images from a wide variety of formats, including BMP, JPG, PNG, GIF, ICO and PSD. Except for I/Os, friday is entirely written in Haskell.

Images can be represented in two representations:

The library currently support four color spaces: RGB, RGBA, HSV and gray-scale images.

Please read our README to get a detailed usage and some examples.

Versions [RSS] [faq] 0.1, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5,,,,,,,,
Dependencies base (==4.*), bytestring (>=0.10 && <1.0), convertible (==1.*), friday, primitive (>= && <0.6), ratio-int (>=0.1.2 && <0.2), transformers (==0.3.*), vector (>= && <1.0) [details]
License LGPL-3.0-only
Author Raphael Javaux <raphaeljavaux[at]>
Maintainer Raphael Javaux <raphaeljavaux[at]>
Revised Revision 1 made by HerbertValerioRiedel at 2016-12-18T09:50:52Z
Category Graphics
Home page
Uploaded by RaphaelJavaux at 2014-08-29T18:45:11Z
Distributions NixOS:
Executables resize_image, histogram, gaussian_blur, canny, delayed
Downloads 12438 total (50 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by Bayesian average]
Your Rating
  • λ
  • λ
  • λ
Status Hackage Matrix CI
Docs available [build log]
Successful builds reported [all 1 reports]



Manual Flags

Automatic Flags

Compiles examples from the example/ directory.


Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.

Maintainer's Corner

For package maintainers and hackage trustees