ImageFilters.js
About
A Javascript Image filter library for the HTML5 Canvas tag.
Usage
include the library into your html.
<script type="text/javascript" src="imagefilters.js"></script>
Each filter will take an ImageData as the first parameter and always return a modified copy. Below is a basic example.
<script type="text/javascript">
var canvas = document.getElementById('canvas_id');
var ctx = canvas.getContext('2d');
// do some drawing to your context...
// create an ImageData for the area you want to apply the filter.
var imageData = ctx.getImageData(0, 0, 300, 200);
// pass it to a filter and get the modified copy
var filtered = ImageFilters.GrayScale(imageData);
// put it back into a context to view the results
ctx.putImageData(filterd, 0, 0);
</script>
check out the Examples section for more details.
Examples
Basic usage (view source)
http://www.arahaya.com/imagefilters/usage1/
API demos
http://www.arahaya.com/imagefilters/
Ripple effect demo
http://www.arahaya.com/imagefilters/ripple/
Tested Browsers
Opera 10.50
Chrome 11.0.696.68
Firefox 3.5.4
IE 9
API List
ImageFilters.ConvolutionFilter (srcImageData, matrixX, matrixY, matrix, divisor, bias, preserveAlpha, clamp, color, alpha)
ImageFilters.Binarize (srcImageData, threshold)
ImageFilters.BlendAdd (srcImageData, blendImageData, dx, dy)
ImageFilters.BlendSubtract (srcImageData, blendImageData, dx, dy)
ImageFilters.BoxBlur (srcImageData, hRadius, vRadius, quality)
ImageFilters.GaussianBlur (srcImageData, strength)
ImageFilters.StackBlur (srcImageData, radius)
ImageFilters.Brightness (srcImageData, brightness)
ImageFilters.BrightnessContrastGimp (srcImageData, brightness, contrast)
ImageFilters.BrightnessContrastPhotoshop (srcImageData, brightness, contrast)
ImageFilters.Channels (srcImageData, channel)
ImageFilters.Clone (srcImageData)
ImageFilters.CloneBuiltin (srcImageData)
ImageFilters.ColorMatrixFilter (srcImageData, matrix)
ImageFilters.ColorTransformFilter (srcImageData, redMultiplier, greenMultiplier, blueMultiplier, alphaMultiplier, redOffset, greenOffset, blueOffset, alphaOffset)
ImageFilters.Copy (srcImageData, dstImageData)
ImageFilters.Crop (srcImageData, x, y, width, height)
ImageFilters.CropBuiltin (srcImageData, x, y, width, height)
ImageFilters.Desaturate (srcImageData)
ImageFilters.DisplacementMapFilter (srcImageData, mapImageData, mapX, mapY, componentX, componentY, scaleX, scaleY, mode)
ImageFilters.Dither (srcImageData, levels)
ImageFilters.Edge (srcImageData)
ImageFilters.Emboss (srcImageData)
ImageFilters.Enrich (srcImageData)
ImageFilters.Flip (srcImageData, vertical)
ImageFilters.Gamma (srcImageData, gamma)
ImageFilters.GrayScale (srcImageData)
ImageFilters.HSLAdjustment (srcImageData, hueDelta, satDelta, lightness)
ImageFilters.Invert (srcImageData)
ImageFilters.Mosaic (srcImageData, blockSize)
ImageFilters.Oil (srcImageData, range, levels)
ImageFilters.OpacityFilter (srcImageData, opacity)
ImageFilters.Posterize (srcImageData, levels)
ImageFilters.Rescale (srcImageData, scale)
ImageFilters.Resize (srcImageData, width, height)
ImageFilters.ResizeNearestNeighbor (srcImageData, width, height)
ImageFilters.Sepia srcImageData)
ImageFilters.Sharpen (srcImageData, factor)
ImageFilters.Solarize (srcImageData)
ImageFilters.Transpose (srcImageData)
ImageFilters.Twril (srcImageData, centerX, centerY, radius, angle, edge, smooth)