Crop and re-size photos stored in PIcasa, without HTML

Some very interesting info from David of Blogger Xpertise about controlling the display of photos from Picasa by manipulating the URL.   What he's found is nothing that we couldn't do with HTML, but I have a feeling that it might point to some other possibilities using Picasa's URLs.   Ref:   http://blogxpertise.blogspot.com/2012/05/tip-automatically-cropping-square-and.html