22-animation

22-animation - Class Calendar: Short proposal (April11):...

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1 Computer Animation Lecture 22 CPSC 578/478 Spring 2005 Class Calendar: April 6: assignment #4 topic/teams WERE due April 11: assignment #3 graded, returned today April 11: assignment #4 short proposal due TODAY April 13: Quiz #2 (Study Guide on-line) April 18: assignment #4 long proposal due April 20: assignment #4 oral proposal/preliminary results May 10: assignment #4 code, executable report due 1. Goal What are we going to do? 2. Previous Work What related work has been done? 3. Approach What approach are we going to try? Why do we think it will work well? 4. Methodology What steps (task list) are required? Which of these steps is particularly hard? What to do if the hard steps don't work out? 5. Metrics How will we know when we are done? How will we know whether we have succeede 6. Summary What will we learn by doing this project? Short proposal (April11): Address 1 to 3 Full proposal (April18): Expand discussion of 1 to 3 Address 4 to 6 Assignment # 4 Teams Logan, Grinberg, Abrams : Sculpting Tunali, Wang, Wu: Marking on objects to be scanned Condon, Remus, Ruberry: "Multi-agent user interface perspective and interaction control" Barry: Planetary system Gallaudet: Boat design Tully, Barnard: Keyframe Animation QUIZ #2 Material covered: Lectures from Feb. 16 to Apr. 11 (inclusive) Like last time: Can bring one 8.5 x 11 inch paper Study Guide posted on Web http://graphics.idav.ucdavis.edu/graphics/CAGDNotes/homepage.html
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2 Course Syllabus I. Image processing II. Rendering III. Modeling IV. Animation V. Advanced Topics Image Processing Modeling Animation Rendering Computer Animation Perception of Motion Animation Methods Keyframing & Splines Temporal Aliasing /Motion Blur Kinematics Inverse Kinematics Dynamics Animation Techniques (Luxo Jr.) Perception of Motion How is it even possible to make it look things look like they are moving, or even alive with the computer? Motion: Perception Illusion of Motion When we view a series of static images we perceive movement Muybridge http://photo.ucr.edu/photographers/muybridge/contents.html# Motion: Perception Illusion of Motion How many images/sec to perceive smooth motion? Film: 24 frames/sec NTSC Video (US): 30 frames/sec PAL or SECAM : 25 frames/sec HDTV, Computer displays: up to 60 frames/sec Visualization systems: as low as 10-15 frames/sec Motion: Perception Illusion of Motion One limitation: The correspondence problem, need to be able to match up an object from frame to frame
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3 Side note about perception of motion: Perception of motion not due to “persistence of vision” http://www.grand-illusions.com/percept.htm PERSISTENCE OF VISION by Stephen Herbert "Virtually every . .. account of the perception of movement in film texts [is] wrong. The impression of movement is not due to persistence of vision. The very persistence with which this 'explanation' has been recited says more about the hermetic and impressionistic world of some film scholarship than it does about the actual mechanisms involved. " (Bill Nichols and Susan J. Lederman) What is this? 13 points? Pretty easy to render Motion: Higher Level Effects We recognize human motion
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22-animation - Class Calendar: Short proposal (April11):...

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