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

Some very attractive info from David of Blogger Xpertise almost scheming the show of photos from Picasa by manipulating the URL.  
What he's found is nothing so as to we couldn't act with HTML, but I allow a feeling so as to it might mean to a few other possibilities using Picasa's URLs.   Ref:   Http://blogxpertise.Blogspot.Com/2012/05/tip-automatically-cropping-square-and.Html