Hi! I'm a lecturer in image manipulation focusing on the technical background. I found it very hard to find any information on more complex filters and algorithms. Books on image processing provide the basics such as gaussian, median, closing, opening etc. Some hints in the Graphics Gems are also helpfull. But is there a book dealing with the "how to" of, i.e., light effects, glass effects and such things. I want my students to understand only which button to press but also how to program there own filters. Any kind of support is highly appreciated! Andreas ____________ ______ \ \~~~\ \ \ / Prof. Dr. Andreas Kolb \ \ \ \ \ / Faculty of Media-Information Science \ \== \ \==\/ Fachhochschule Wedel, University of Applied Sciences \ \ \ \ smail: Feldstrasse 143, D-22880 Wedel, Germany \ / \ / Tel.: +49-4103-8048-40, Fax.: +49-4103-8048-39 \/ \/ email: akolb@xxxxxxxxxxx, http://www.fh-wedel.de/~ko