Robert, Nearly all the "motion capture" systems are now real-time. There is a trade off for frame rate / markers in some systems - so fewer markers, the higher the frame rate, but all have a good rate for most applications. In 1994 I dervied the term "Performance Capture" for reasons explain in the article I refered to in my previous mail to David, which I hope people will adopt to prevent this confusion. The term "motion capture" originates back to the painter Diego Velasquez for his painting "The Tapestry Weavers" c.1654 in which he was the first artist to record 'blurred motion' in the form of spinning-wheel's spokes. Up-until that picture all 'clasical' artists had recorded movement as a static snapshot with no visual reference to time other than posture (e.g. a horse drawn cart would be depicted with the spokes as clear straight lines). Photography broke new boundaries, as did video capture. Now there are some new exciting technologies that don't have "2D eyes" such as a CCD chip. The application for the technology has varied though - where "motion capture" I belive should refer to the scientific recording and measurement of movement such as biomechanics or machine quality control analysis, and "performance capture" should refer to the recording and subsequent use of humann and animal theatrical performances for film/tv/games/dance/stage... Some may find the distinction pedantic, but I hope it's use would emphasise that the performance is the focus of the work (in our cases) not the scientific data - after-all you can 'motion capture' a performer that can't act/dance... I have not yet used EyeCon yet and would very much like to see it in action - please could you refer me to someone locally in the S.East/London UK. Regards, Richard Widgery richardw@kinetic-impulse.com KINETIC IMPULSE - Digital Performance Art & Science -------------------------------------------------------- http://www.kinetic-impulse.com 87 Hadlow Road, Tonbridge, Kent, TN9 1QD, England Tel: +44 (0) 7050 644818 Fax: +44 (0) 1732 364067 -------------------------------------------------------- DISCUSSION FORUM - CG Animation / Motion Capture / Stage & Theatre http://www.kinetic-impulse.com/DigiPerfTech_Index.htm SERVICES - Visual Effects Production / MoCap Production / Custom Tools Dev. http://www.kinetic-impulse.com/text/services/visual_effects_production.html NEW GALLERY (featuring MoCap Data Examples) http://www.kinetic-impulse.com/text/gallery/index.html DOWNLOAD MOCAP - Movies & (Data - coming soon) http://www.kinetic-impulse.com/text/download_movies_free_motion_capture_data /index.html PRINTABLE BROCHURES - Letter & A4 Format http://www.kinetic-impulse.com/text/download_movies_free_motion_capture_data /printable_brochure/index.html ONLINE FORMS - Request Further Information / Website Errors http://www.kinetic-impulse.com/text/on_line_forms/index.html -----Original Message----- From: owner-dance-tech@lists.acs.ohio-state.edu [mailto:owner-dance-tech@lists.acs.ohio-state.edu]On Behalf Of Robert Wechsler Sent: 04 January 2002 00:11 To: dance-tech@lists.acs.ohio-state.edu Subject: Re: A question.... At 07:48 03.01.2002 -0800, you wrote: >Sal, > >What kind of motion capture are you referring to? i've noticed this confusion as well. the term "motion capture", if i am not mistaken, was traditionally used for the systems film makers use to make animated film figures move more realistically. there may be some exceptions, but these are generally not real-time systems and involve quite elaborate specially-built studios and sensor hardware/software systems. I've noticed a tendency to use the term to refer to systems such as Antonio Camurri's and ours (EyeCon) as well. That is, systems which have nothing directly to do with generating animated films, but instead which are used in live performance situations to analyze and translate human motion or dance into other media. Maybe its confusing, but I too have started calling such systems, "motion capture". They do, after all, "capture" the dancer's motion and make it available to do something with it. yours truly, robert wechsler >If I read David >correctly, he is considering about Motion Capture animation which has >nothing to do with iMovie or Firewire Ports until you are very far along in >the pipeline and ready to output... which means after the capture, clean up >of data and rendering. > >David, I wrote a paper that describes the basic hardware/software....etc. >I'll send it under separate cover. Also, check on the dance-tech archives. >There has been some discussion about motion and I believe there references >to sites such as Vicon, Motion Analysis (both optical systems) and others. > >Hope this helps, >Lisa > > >>David >> >>I would take the time to consider a low end Mac for simple motion capture. >> >>Every Mac ships with iMovie and FireWire Ports (for Digital Video Cameras). >> >>There is an apple in the UK which you can ask questions of. >> >>Their website is: http://www.apple.com/uk/ >> >>Not trying to sell you anything, just asking you to consider alternatives. >> >>Kind Regards, >> >>Sal Abohamed >> >>Apple Computer Australia Pty Ltd >>16 Rodborough Rd, Frenchs Forest NSW 2860 >>TEL: 02 9641 8579 >>FAX: 02 9641 8160 >>ABN: 46 002 510 054 >> >>> From: David Yoken <David.Yoken@turkuamk.fi> >>> Reply-To: dance-tech@lists.acs.ohio-state.edu >>> Date: Sat, 22 Dec 2001 08:56:51 +0200 >>> To: dance-tech@lists.acs.ohio-state.edu >>> Subject: A question.... >>> >>> >>> Hello, >>> >>> Would any one have the time or interest to respond to this seemingly simple >>> (perhaps not) question: >>> >>> >>> What basic hard/software is/are required for "Motion Capture": specific >>> brand and model numbers....? We are working with Life Forms in Windows NT >>> format. >>> >>> Many thanks and warm holiday greetings from up north, >>> >>> David >>> >>> David Yoken >>> Arts Academy >>> Turku Polytechnic Linnankatu 54 20100 Turku FINLAND >>> tel: 358 (0) 10 553 5237 mobile: 358 (0) 50 598 5217 >>> FAX: 358 (0) 10 553 5200 email: david.yoken@turkuamk.fi >>> > >===================================== >Dr. Lisa Naugle >Assistant Professor >Dance and Technology >University of California, Irvine >School of the Arts, Department of Dance >MAB 300 >Irvine, California 92697-2775 >email: lnaugle@uci.edu >tel: (949) 824-3209 >fax: (949) 824-4563 >http://www.arts.uci.edu/lnaugle/ > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Robert Wechsler Artistic Director PALINDROME Inter-media Performance Group Johannisstr. 42 90419 Nürnberg fon: 49 911 39 74 72 fax: 49 911 377 8311 mobile: 49 179 511 0400 http://www.palindrome.de
This archive was generated by hypermail 2b30 : 01/24/02