Once upon a time, grayscale image has to be manually converted in order to be displayed on the web. Now with HTML5 canvas, images can be manipulated into grayscale without having to use image editing software.
This demo
is intended to show you how to make a grayscale/color image hover
effect with HTML5 and jQuery. To achieve this effect before HTML5, two
images are required: a color and a grayscale version. Now HTML 5 made it
easier and faster because the grayscale image is generated from the
original source.
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