Message-Id: <mailto:199408281414.JAA14256@library.wustl.edu> Date: Sun, 28 Aug 1994 10:10:33 -0400 From: Cynthia Frazier <mailto:cf12@CORNELL.EDU> Subject: Re: visually lossless To: Multiple recipients of list IMAGELIB <mailto:IMAGELIB@ARIZVM1.BITNET>
>Though I think thatthe "visually lossless" idea is an interesting way
>to look at the lossy/lossless problem, any discussion of lossless
>must be qualified by how the image will be displayed. As
>Robert MacKimmie pointed out, an image that looks good (visually
>lossless) as a fullscreen image may look horrible (very lossy)
>when you zoom in on it. Likewise, an image that appears visually
>lossless on the screen may look very lossy when printed out. I really
>think that any discussion of loss must keep in mind the potential
>uses of the image.
This is a good point and one that I have to constantly reiterate during my classes. It's a very difficult concept for people to understand. I well remember my own disappointment when first printing out what appeared to be a beautiful image on the screen.
Cynthia Frazier Instructional Design Specialist Instructional Services Cornell Information Technologies Cornell University, Ithaca NY 14530 607-255-0748 mailto:cf12@cornell.edu