50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
picedit
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=======
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A simple CLI and API for image manipulation
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CLI Usage
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---------
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```
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Usage: picedit <input> [OPTIONS]
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Options:
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--contrast <n> - a number between -255 and 255
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--brightness <n> - a number between -255 and 255
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--gamma <n>
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--fade <n> - a number between 0 and 100
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--rotate <n> - rotate image by n degrees
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--grayscale - turn the image grayscale
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--invert - invert (negative) the image
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--compress <n> - approximate the (width - n)-th rank of image using SVD
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a number between 0 (no compression) and image width (full compression)
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note: this is not size compression
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--output <filename> - output name, defaults to 'output.png'
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```
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Example:
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```
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stack exec picedit -- dreamboy.jpg --grayscale --contrast 180 --gamma 2 --rotate 180
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```
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<img width='45%' src='https://github.com/mdibaiee/picedit/blob/master/dreamboy.jpg?raw=true' />
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<img width='45%' src='https://github.com/mdibaiee/picedit/blob/master/output.png?raw=true' />
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Embedding images:
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<img width='2%' src='https://github.com/mdibaiee/picedit/blob/master/45.png?raw=true' />
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<img width='45%' src='https://github.com/mdibaiee/picedit/blob/master/output.png?raw=true' />
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<img width='45%' src='https://github.com/mdibaiee/picedit/blob/master/test.png?raw=true' />
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Library
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-------
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[Documentation available at hackage](https://hackage.haskell.org/package/picedit-0.1.0.0/docs/Data-Picture.html)
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```haskell
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import Data.Picture
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main = do
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pic <- readPicture "myfile.png"
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writePicturePng "output.png" (grayscale pic)
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```
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