Data.Image.IO

Documentation

class DisplayFormat df where

A DisplayFormat for writing to a file

Methods

format :: df -> String

Instances

DisplayFormat ComplexImage

DisplayFormat ColorImage

DisplayFormat GrayImage

class RealFrac (GrayVal px) => GrayPixel px where

GrayPixels will be converted using this class

Associated Types

type GrayVal px :: *

Methods

toGray :: px -> GrayVal px

Instances

GrayPixel Color

GrayPixel Gray

class RealFrac (ColorVal px) => RGBPixel px where

RGBPixels will be converted using this class

Associated Types

type ColorVal px :: *

Methods

toRGB :: px -> (ColorVal px, ColorVal px, ColorVal px)

Instances

RGBPixel Color

RGBPixel Gray

writeImage :: DisplayFormat df => FilePath -> df -> IO ()

Given a file name and a formatable image, writes the image to that file with the format.

>>> frog <- readImage "images/frog.pgm"
>>> writeImage "transposeFrog.pgm" (transpose frog)

https://raw.github.com/jcollard/unm-hip/master/examples/frog.jpg

https://raw.github.com/jcollard/unm-hip/master/examples/transposefrog.jpg

>>> cactii <- readColorImage "images/cactii.ppm"
>>> writeImage "inverseCactii.ppm" (imageMap (*(-1)) cactii)

https://raw.github.com/jcollard/unm-hip/master/examples/cactii.jpg

https://raw.github.com/jcollard/unm-hip/master/examples/inversecactii.jpg

toPGM :: (Image img, GrayPixel (Pixel img)) => img -> [Char]

Converts an image an ASCII PPM scaled between pixel values of 0 and 255

toPPM :: (Image img, RGBPixel (Pixel img)) => img -> [Char]

Converts an image to an ASCII PPM scaled between pixel values of 0 and 255