-- Dr Adrian Whichello Phone: +61 2 9351 5339 Imaging Science and Engineering Laboratory Fax: +61 2 9351 3847 Sydney University Electrical Engineering Email: adrianw@ee.usyd.edu.au Australia WWW: http://www.ee.usyd.edu.au/~adrianw"I wish to God these calculations had been executed by steam!" - C. Babbage