1. The problem statement, all variables and given/known data We shattered a wineglass using resonance. We also filmed the radius distortions here: http://www.youtube.com/watch?v=HpcXf906wPw&feature=channel_page We also filmed it shattering here: http://www.youtube.com/watch?v=45agipT91Vw&feature=channel How do we measure how much the radius of the rim distorts? 2. The attempt at a solution I got this free software Imagej, one can use it to set scale and measure distances in images. And do many other things. But I still cant figure out how to measure the amount of radius distortion. Anybody got any simpler and/or better ideas?