X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f996b,638a484da407e128 X-Google-Attributes: gidf996b,public X-Google-ArrivalTime: 1994-06-05 11:36:51 PST Newsgroups: alt.ascii-art Path: nntp.gmd.de!xlink.net!sol.ctr.columbia.edu!news.kei.com!ub!dsinc!vu-vlsi.ee.vill.edu!cats.ucis.vill.edu!157763091 From: 157763091@cats.ucis.vill.edu (James J. Marshall) Subject: Re: stereogram: small image of Saturn and its moons Message-ID: <5JUN199413231945@cats.ucis.vill.edu> News-Software: VAX/VMS VNEWS 1.4-b1 Sender: news@vu-vlsi.ee.vill.edu Organization: Villanova University References: <5JUN199412565409@cats.ucis.vill.edu> Date: Sun, 5 Jun 1994 18:23:00 GMT Lines: 32 In article <5JUN199412565409@cats.ucis.vill.edu>, 157763091@cats.ucis.vill.edu (James J. Marshall) writes... >In article , dljar1@giaeb.cc.monash.edu.au (Dwayne Jarvis) writes... >> >>>3-D space image, make your eyes go cross-eyed, left eye looking at the >>>left "o", right eye on the right "o" at the top of the image. Saturn >>>and its moons will appear to be closer than the backround stars, and >>>the moons at various depths. >> >>I dunno. I got the stars -behind- the planets only when I focussed >>outwards. Focussing in the cross-eye'd fashion made the stars apear >>in front of the planets. Weird X-). >> > [picture deleted] > >You're right! I just purchased two short books on stereograms and those >type of 3d pictures and it does mention the difference between the two >ways of viewing these images. It calls them the parallel and the cross- >eyed techniques. To briefly summarize a section of the book: Looking >at the image one way (e.g. parallel technique) causes certain parts of the >image to stand out. When the same image is viewed the other way (i.e. >cross-eyed technique) the same sections now appear to recede into the image. >Using the wrong technique can cause certain images to appear nonsensical >(e.g. images of actual things rather than shapes or designs or something). >By the way, the cross-eyed technique tends to be easier because we can focus >our eyes in a much broader range when crossing them rather than attempting >to focus out at infinity (the parallel technique). I almost forgot, using the parallel technique generally makes the picture appear larger, while the cross-eyed technique generally makes the picture appear smaller. > > -- James Marshall > 157763091@ucis.vill.edu