I am taking a graduate course called "Vision Systems". This course "presents an introduction to the physiology, psychophysics, and computational aspects of vision". The professor teaching the course recommended that those of us that have not taken at least an undergraduate course in perception get an introductory book on the subject. The one he recommends, which is also the one he uses for his undergraduate course, is this: http://www.amazon.com/Sensation-Perception-Looseleaf-Third-Edition/dp/0878938761 Unfortunately, this book goes for $60-75 for used loose leaf, all the way up to $105 for new hardcover. I'd rather not pay that, unless I can get an independent recommendation for it, or for some other book on the subject.

Does anybody here have a recommendation? Are there good course notes available on the web somewhere?