A jQuery plugin which detects faces in pictures and returns theirs coords. This plugin uses an algorithm by Liu Liu.

Demo here: http://facedetection.jaysalvat.com/

Includes

<script src="http://code.jquery.com/jquery-1.4.3.min.js"></script> 
<script src="js/facedetection/ccv.js"></script> 
<script src="js/facedetection/face.js"></script>
<script src="js/jquery.facedetection.js"></script> 

Image

<img id="myPicture" src="img/face.jpg">

Script

<script>
	$(function() {
		var coords = $('#myPicture').faceDetection();
		console.log(coords);    
	});
</script> 

Returns an array with found faces object:

x: Y coord of the face

y: Y coord of the face

width: Width of the face

height: Height of the face

positionX: X position relative to the document

positionY: Y position relative to the document

offsetX: X position relative to the offset parent

offsetY: Y position relative to the offset parent

confidence: Level of confidence

confidence: Minimum level of confidence

start: Callback function trigged just before the process starts. DOES'NT WORK PROPERLY

start:function(img) {
	// ...
}

complete: Callback function trigged after the detection is completed

complete:function(img, coords) {
	// ...
}

error: Callback function trigged on errors

error:function(img, code, message) {
	// ...
}