bmd = document.getElementById("canvas").bitmapData; bikes = new Image(); bikes.src = "res/bikes.png"; bmd.draw(bikes); lenna = new Image(); lenna.src = "res/lenna-300x300.png"; leenaData = new BitmapData(300, 300); leenaData.draw(lenna); bmd.copyChannel(leenaData, new Rectangle(50, 50, 200, 200), new Point(50, 50), BitmapDataChannel.GREEN, BitmapDataChannel.GREEN);