Resize/Crop/Rotate/Pad images in Clojure without any native install. Oh and do it Fast.
Image Resizer under the hood wraps imgscalr.
Add the following dependency to your project.clj file:
Image resizer creates tranforms which return fns that apply that transform to an image.
A number of transforms are supported:
If you want to perform a number of operations across an image (such as resize, crop, flip & pad):
(require [image-resizer.crop :refer :all]) (require [image-resizer.resize :refer :all]) (require [image-resizer.pad :refer :all]) (require [image-resizer.rotate :refer :all])
(-> image ((resize-fn 100 100)) ((crop-fn 100 100)) ((rotate-vertically-fn)) ((pad-fn 10)))
;Or if you want to apply a transform to a batch of images in parallel:
(doall (clojure.core/pmap (resize-fn 100 100) [image1 image2 image3 image4]))
You can tweak your preferences for a resize transform. Favouring speed or quality:
(require [image-resizer.resize :refer :all]) (require [image-resizer.scale-methods :refer :all])
(resize-fn 100 100 ultra-quality) ;best quality (resize-fn 100 100 speed) ;fast as possible resize
If creating your own pipelines seems a bit funky, you can use some nice helpers for commmon operations:
(require [image-resizer.core :refer :all])
;Resize an image while respecting original ratio ;Notice how the height is not 10 to respect the ratio of the image (resize (file "white-rabbit.jpg") 10 10) ; => #
;Resize an image to a width (resize-to-width (file "queen-of-hearts.jpg") 10) ; => #
;Resize an image to a height (resize-to-height (file "cheshire-cat.jpg") 10) ; => #
;Force width and a height resize (ignoring ratios) (force-resize (file "cheshire-cat.jpg") 10 1000) ; => #
;Crop the image width (crop-to-width (file "tea-party/mad-hatter.jpg") 10) ; => #
;Crop the image height (crop-to-height (file "tea-party/mad-hatter.jpg") 10) ; => #
;Crop the image width and height (crop (file "tea-party/mad-hatter.jpg") 10 20) ; => #
;Crop the image width and height from a coord (crop-from (file "tea-party/mad-hatter.jpg") 6 7 10 20) ; => #
;Resize the image maintaining proportions and then crop it to the specified width and height (resize-and-crop (file "tea-party/mad-hatter.jpg") 10 10) ; => #
(require [image-resizer.format :as format])
;Saving as an auto-named file (format/as-file (resize (file "tea-party/mad-hatter.jpg") 10 10) "/tmp/tea-party/mad-hatter.jpg") ; => "/tmp/tea-party/mad-hatter_10x5.jpg"
;Saving under a specific name (format/as-file (resize (file "tea-party/mad-hatter.jpg") 10 10) "/tmp/tea-party/tiny-hatter.jpg" :verbatim) ; => "/tmp/tea-party/tiny-hatter.jpg"
;To a stream (Useful for s3) (format/as-stream (resize (file "tea-party/mad-hatter.jpg") 10 10) "jpg") ; => #
(The MIT License)
Copyright (c) 2013-present Joseph Wilk
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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