Xref: utzoo sci.psychology:4902 comp.graphics.visualization:520 Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!uunet!stanford.edu!neon.Stanford.EDU!neon!peda From: peda@simplicity.Stanford.EDU (Bill Codding) Newsgroups: sci.psychology,comp.graphics.visualization Subject: Re: Real 3D PHOTOCOPY - black & white - no glasses... Message-ID: Date: 29 Apr 91 18:36:16 GMT References: <4354.2816ba40@iccgcc.decnet.ab.com> Sender: news@neon.Stanford.EDU (USENET News System) Organization: None to Speak Of Lines: 30 In-Reply-To: fleischer@iccgcc.decnet.ab.com's message of 25 Apr 91 16:15:12 GMT In article <4354.2816ba40@iccgcc.decnet.ab.com> fleischer@iccgcc.decnet.ab.com writes: I saw the most *amazing* "3D" black and white photocopy of an advertisement by PENTICA. It looked like a random patern of squiggles in a box with 2 large black dots above. When you shift the focus of your eyes to make the 2 dots overlap, this flat XEROX'd picture turns 3D. It's like you're looking through a window to a picture about 1 foot below the paper with letters and numbers at various heights above the picture. Does anyone know how this was done? Is there PC software that will let you build these and print them on a laser printer? Is there a collection of these? Who did the theory and development? Does it require more resolution than exists on a VGA display? IS there a dynamic/moving version? Sounds like what you are describing is an example of a simple artificial stereo pair. I *think* that an example of this exists in the book _Procedural Elements for Computer Graphics_ by David F. Rogers, McGraw-Hill, 1985. Check before you buy, because I am not 100% positive where I saw it (I returned the book to its rightful owner some time ago.) ------------------------------------------------------------------------ Bill Codding (415)493-3554 (w) Research Engineer (415)751-5484 (h) P.E.D.A. peda@simplicity.Stanford.EDU ------------------------------------------------------------------------