I was messing around with HTML5 Canvas transform and was having trouble getting the right values that I wanted.
I decided to build a page that allowed me to test how to manipulate images on the fly. It allows linking to multiple images and transforming it how you want.
Ensure that there is an image source and that there is a value in each box for the image to appear.
Check it out, and if you have any questions or suggestions please feel free to comment.