B*W to Color

B*W to Color.html

Okie dokie. 

https://gist.github.com/1036157

<pre>

&lt;!DOCTYPE html> 
 
&lt;html lang="en"> 
&lt;head> 
   &lt;meta charset="utf-8"> 
   &lt;title>untitled&lt;/title> 
	&lt;style> 
		/* Setup...not important. */
		.img-wrap {
			width: 500px;
			margin: 100px auto;
			position: relative;
			cursor: pointer;
		}
		
		/* Handles animation of b*w to color */
		canvas {
			position: absolute;
			left: 0;
			top: 0;
			opacity: 1;
			-webkit-transition: all 1s;
			-moz-transition: all 1s;
			-o-transition: all 1s;
			-ms-transition: all 1s;
			transition: all 1s;
		}
		
		canvas:hover {
			opacity: 0;
		}
		
		/* If you MUST have IE support */
		#cvs-src {
		   filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
		}
		
		#cvs-src:hover {
			filter: none;
		}
	&lt;/style>  
&lt;/head> 
&lt;body> 
 
&lt;div class="img-wrap"> 
	&lt;img id="cvs-src" src="your-image.jpg" /> 
	&lt;canvas width=500 height=500>&lt;/canvas> 
&lt;/div> 
 
&lt;script> 
	(function() {
		var supportsCanvas = !!document.createElement('canvas').getContext;
		supportsCanvas && (window.onload = greyImages);
		
		function greyImages() {
			var ctx = document.getElementsByTagName("canvas")[0].getContext('2d'),
				img = document.getElementById("cvs-src"),
				imageData, px, length, i = 0,
				grey;
			
			ctx.drawImage(img, 0, 0);
			
			// Set 500,500 to the width and height of your image.
			imageData = ctx.getImageData(0, 0, 500, 500);
			px = imageData.data;
			length = px.length;
					
			for ( ; i &lt; length; i+= 4 ) {
				grey = red * .3 + green * .59 + blue * .11;
				px[i] = px[i+1] = px[i+2] = grey;
			}
			
			ctx.putImageData(imageData, 0, 0);		
		}
	})();
&lt;/script> 
 
&lt;/body> 
&lt;/html>	
</pre>