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Monthly Downloads: 13
Programming language: Haskell
License: GNU General Public License v3.0 only
Tags: Graphics     Image     Image Processing     Picture     Matrix    

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README

picedit

A simple CLI and API for image manipulation

CLI Usage

Usage: picedit <input> [OPTIONS]
Options:
  --contrast <n> - a number between -255 and 255
  --brightness <n> - a number between -255 and 255
  --gamma <n>
  --fade <n> - a number between 0 and 100
  --rotate <n> - rotate image by n degrees
  --grayscale - turn the image grayscale
  --invert - invert (negative) the image
  --compress <n> - approximate the (width - n)-th rank of image using SVD
                   a number between 0 (no compression) and image width (full compression)
                   note: this is not size compression
  --output <filename> - output name, defaults to 'output.png'

Example:

stack exec picedit -- dreamboy.jpg --grayscale --contrast 180 --gamma 2 --rotate 180

Embedding images (the zombie is embedded at top left, 100x + 10y):

Library

Documentation available at hackage

import Data.Picture

main = do
  pic <- readPicture "myfile.png"

  writePicturePng "output.png" (grayscale pic)