#FILTER.js

A JavaScript Library for Image/Video Processing and Filtering using HTML5 APIs

This is a library for filtering images/video in JavaScript using HTML5 features like Canvas, WebWorkers, WebGL and SVG (in progress).

• filter.js
• filter.min.js
• filter.plugins.js
• filter.plugins.min.js
• filter.bundle.js, filter+plugins+dependencies

###Contents

• Live Examples
• Browser Support
• Credits
• Features
• API Reference
• ChangeLog
• Todo

###Live Examples

• Image Processing with Filter.js
• Video Processing with Filter.js
• Sound Visualization with Filter.js
• Filter.js with Three.js

###Browser Support

###Credits

Some filters code has been adapted from open source libraries (mostly flash and java, plus a couple from javascript libraries), see the comments in the code for details.

###Features

The library dependencies are:

• Classy.js micro Object-Oriented framework.
• Asynchronous simple manager for async/parallel tasks.

The framework defines an Image Proxy class, which represents an Image, a Color Utilities Class and 8 generic Filter types plus various Plugins (with support for parallel processing transparently)

0. AbstractFilter
1. ColorMatrixFilter (analogous to the ActionScript filter)
2. TableLookupFilter
3. ConvolutionMatrixFilter (analogous to the ActionScript filter)
4. DisplacementMapFilter (analogous to ActionScript filter)
5. GeometricMapFilter
6. MorphologicalFilter
7. StatisticalFilter (previously called NonLinearFilter)
8. CompositeFilter (an abstraction of a container for multiple filters)

Parallel Workers Support (support parallel procesing/filtering with filter workers in an intuitive and transparent way)

Extension by Plugins / Inline Filters

Image Blending Modes (analogous to PhotoShop blend modes)

Each generic filter is prototype but it also includes basic implementation filters like grayscale , colorize , threshold , gaussBlur , laplace , emboss , etc..

TIP: You can create your custom build of the library with the filters/plugins you choose. Each filter and plugin is independent and can be used in a mix-n-match manner, as long as the core classes are always included. Change the dependencies file(s) to include your own selection of filters and plugins for your custom build

###Todo

• add WebGL support for various pre-built and custom Filters (in progress)
• add SVG Filters interface support for various pre-built and custom Filters (in progress)
• add CSS Filters interface support for various pre-built and custom Filters (in progress)
• add support for Parallel Processing using Web Workers and/or Asynchronous Processing [DONE partially]
• make convolutions/statistics faster [DONE partially]
• use fixed-point arithmetic, micro-optimizations where possible [DONE partially]
• add caching of filter parameters where applicable [DONE partially]
• add more filters (eg split/combine/adaptive/nonlinear etc..) [DONE partially]
• add 2d-fft routines, frequency-domain filtering
• allow to work in Node
• increase support/performance for Opera, IE [DONE partially]

URL Nikos Web Development
URL FILTER.js blog post
URL WorkingClassCode