<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/07/27/converting-an-image-to-black-and-white-using-the-colormatrixfilter/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="horizontal"
        backgroundColor="white" viewSourceURL="srcview/index.html">
    
    <mx:Script>
        <![CDATA[
            private var rLum:Number = 0.2225;
            private var gLum:Number = 0.7169;
            private var bLum:Number = 0.0606;
        
            [Bindable]
            private var bwMatrix:Array = [rLum, gLum, bLum, 0, 0,
                            rLum, gLum, bLum, 0, 0,
                            rLum, gLum, bLum, 0, 0,
                            0, 0, 0, 1, 0];
            
            [Bindable]
            [Embed('assets/image2.jpg')]
            private var image2:Class;
            
        ]]>
    </mx:Script>
    
    <mx:ColorMatrixFilter id="cmf" matrix="{bwMatrix}" />
    
    <mx:VBox>
        <mx:Label text="Black and white" />
        <mx:Image source="{image2}" filters="{[cmf]}" scaleX="0.5" scaleY="0.5" />
    </mx:VBox>

    <mx:VBox>
        <mx:Label text="Original" />
        <mx:Image source="{image2}" scaleX="0.5" scaleY="0.5" />
    </mx:VBox>    
    
</mx:Application>