Add Bouncy effect to part of a image.

I am trying to code a web version of iphone app wobble(http://www.chillifresh.com/) in css and javascript.

I tried HTML5 canvas, but had very bad performance issue.

Now trying css keyframes and transitions, but no improvement in performance. Because I have to load same image more than 200 times at a time to give such bouncy effects by manipulating each pixel.

Is there any other better way to do this.