picedit ======= A simple CLI and API for image manipulation CLI Usage --------- ``` Usage: picedit [OPTIONS] Options: --contrast - a number between -255 and 255 --brightness - a number between -255 and 255 --gamma --fade - a number between 0 and 100 --rotate - rotate image by n degrees --grayscale - turn the image grayscale --invert - invert (negative) the image --compress - 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 - output name, defaults to 'output.png' ``` Example: ``` stack exec picedit -- dreamboy.jpg --grayscale --contrast 180 --gamma 2 --rotate 180 ``` Embedding images: Library ------- [Documentation available at hackage](https://hackage.haskell.org/package/picedit-0.1.0.0/docs/Data-Picture.html) ```haskell import Data.Picture main = do pic <- readPicture "myfile.png" writePicturePng "output.png" (grayscale pic) ```