November 2011
Intermediate to advanced
348 pages
7h 2m
English
Content preview from HTML5 Canvas Cookbook
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Creating a pixelated image focus
Looking for a fancy way to focus an image? How about a pixelated image focus? In this recipe, we'll explore the art of image pixelation by looping through an algorithm that pixelates an image less and less until it's completely focused.
Note
WARNING: This recipe must be run on a web server due to security constraints with the getImageData() method.
Follow these steps to create a pixilation function that slowly focuses an image:
How to do it...
- Define the
focusImage()function which de-pixelates an image based on a pixilation value:function focusImage(canvas, context, imageObj, pixelation){ var sourceWidth = imageObj.width; ...
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