Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!apple!bionet!agate!ucbvax!ADS.COM!Vision-List-Request From: Vision-List-Request@ADS.COM (Vision-List moderator Phil Kahn) Newsgroups: comp.ai.vision Subject: Vision-List delayed redistribution Message-ID: <8810212155.AA03463@deimos.ads.com> Date: 21 Oct 88 22:55:25 GMT Sender: daemon@ucbvax.BERKELEY.EDU Reply-To: Vision-List@ADS.COM Distribution: inet Organization: The Internet Lines: 66 Approved: vision-list@ads.com Vision-List Digest Fri Oct 21 14:55:25 PDT 1988 - Send submissions to Vision-List@ADS.COM - Send requests for list membership to Vision-List-Request@ADS.COM Today's Topics: FULCRUM gathering dense image sequences ---------------------------------------------------------------------- Date: Friday, 21 October 1988 10:22:36 EDT From: Dave.McKeown@maps.cs.cmu.edu Subject: FULCRUM Status: RO FULCRUM is an interactive map display system that uses a video disk to store digitized maps at various resolutions. There is a graphic man-machine interface that allows a user to query the display for lat/lon/elevation, a gazetteer, and the ability to generate and place icons. It is not so much automated mapping (ie., cultural or terrain feature extraction from imagery, or automated map name placement, or automated map digitization) as it is a way to interface the display of precompiled cartographic information with a spatial database of geographic facts. It is (was) developed by a company called Interactive Television Company in Virgina, but I don't know any other particulars. Cheers, Dave ------------------------------ Date: Fri, 21 Oct 88 14:22:07 PDT From: pkahn@meridian.ads.com (Phil Kahn) Subject: gathering dense image sequences Status: RO I thought this might be of interest to those of you trying to acquire controlled motion image sequences for testing or developing algorithms. I am particularly interested in acquiring dense image sequences; that is, imagery in which objects don't move more than about a single pixel between frames (as described in Bolles, Baker, & Marimont IJCV, V1, 1987; Kahn, PAMI 7/85 and CVPR88 for a better description). Smooth and controlled motion can be simply obtained by using a special dolly and track available from most Motion Picture Equipment and Supplies rental services (check the phone book). The movie industry uses this to obtain smooth translation of the camera while changing camera position. Your tripod mounts on top of the dolly (about 2' x 3') and fixed positions may be marked along the track position in order to precisely control the position of the camera on the ground plane. Tracks come in 4' and 8' sections. It only cost $25 p/day for the dolly and $8 p/day for each 8' track section. For $50 p/day, we were able to acquire very smooth and precise motion. Because of drift in robots, it is even more precise and controllable than using a mobile robot vehicle to acquire test imagery. ------------------------------ End of VISION-LIST ********************