Richard, thank you for your thorough letter and for correcting my "real-time" mistake. i loved your reference to Diego Velasquez's "The Tapestry Weavers"! you said though that the _term_ dates back to him. can this be true? in any case, your suggestion that we use the expression "performance capture" sounds good to me. still, i wouldnt expect too much in terms of discipline either within the dance-tech community or the english language as a whole. words and expressions tend to float about with volitions of their own. regards, robert At 14:49 05.01.2002 -0000, you wrote: >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 > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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
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