Automatic face detection using Picasa API to extract individual images

Question

(A similar question has been asked on superuser for answers related to applications. The question is posted here to gather programmable solutions for the same)

Answer 1

To answer the picasa question, see this response on the picasa forums:
http://www.google.com/support/forum/p/Picasa/thread?tid=36ae553a7b49088e&hl=en

@oedious wrote:- This is going to be somewhat technical, so hang on. * The number encased in rect64() is a 64-bit hexadecimal number. * Break that up into four 16-bit numbers. * Divide each by the maximum unsigned 16-bit number (65535) and you'll have four numbers between 0 and 1. * The four numbers remaining give you relative coordinates for the face rectangle: (left, top, right, bottom). * If you want to end up with absolute coordinates, multiple the left and right by the image width and the top and bottom by the image height.