Image Convolution Effect in 140byte.es JavaScript

I implemented the imageconvolution() function from PHP in 140byte.es JavaScript. The function applies a 3 × 3 convolution matrix to an image. It can be used to create a surprisingly large amount of image filters like soften and sharpen.

Preset: None (identity) Shift down Contrast Brighten Invert Soften Blur Sharpen Enhance Emboss Relief Outline

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Show the source of this page or visit the Gist at GitHub.