How can I get the height and width of uploaded images?

[jdmswong]

This code prints the image's width and height only after a timeout.

                    onUploaded: function (error, fileRef) {

                        var img = new Image;
                        img.src = Blaze._globalHelpers['fileURL'](fileRef);
                        setTimeout(function () {
                            console.log("5 sec delay:", img.height, " x ", img.width);
                        }, 5000);
                        console.log("First try: ", img.height, " x ", img.width);

Is there a way to get this data without using a timeout?

[jdmswong]

http://stackoverflow.com/questions/5633264/javascript-get-image-dimensions