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Motion Capture By: Ali Hosseini

Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

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Page 1: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Motion Capture

By: Ali Hosseini

Page 2: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Definition of Motion Capture

Motion capture is the recording of

human body movement (or other

movement) for immediate or delayed

analysis and playback. “MoCap”

Page 3: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

History

• Late 1970’s – Rebecca Allen created the first primitive form of motion capture. “Rotoscoping”

• 1980-1983- Tom Calvert invented “Geniometers”

• 1982-1983- Ginsberg & Maxwell invented “Graphical Marionette”

Page 4: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

• 1988- deGraf/Wahrman invented “Mike the Talking Head”

• 1988- Pacific Data Images invented “Waldo C. Graphic”

• 1989- Kleiser- Walczak invented “Dozo”

Page 5: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

• 1991- Videosystem invented “Mat the Ghost”

• 1992- SimGraphics invented “Mario”• 1992- Brad deGraph invented

“Alive”• 1993- Acclaim invented two

character animation motion capture

Page 6: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Process of MoCap

• Data needs to be manipulated

• Transform data into file format

• Build specific models

• Attaching the mesh

Page 7: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Questions to Consider

• How many moves in a level?

• Can keyframe techniques be used?

• What process is efficient?

• Budget?

• Knowledge and skill of team?

Page 8: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Preparation Pre-Studio• Spreadsheet breakdown of shots• Diagramming overhead view of action• Story Boards• Floor Plans for desired moves over

large space• Wardrobe, video reference, stunt

support, craft services.

Page 9: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Pre-Shoot List

• Shot list• Move list• Exceptional talent• Food and water

• Talent with comfortable shoes

• A motion capture system and team

• Well rested

Page 10: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Procedure

• Story board drawn up

• Actors positioned at marks

• Director call action

• Operator of MoCap station to start machine

Page 11: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Procedure Cont…

• Game production manager determines best takes.

• MoCap members clean up data• Files are converted into a skeletal

format that is ready for attachment• Skins meet bones

Page 12: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Human Vs. Computer

• MoCap• Quicker Results• Easier to do what

directors wants

• Key framing• Cost effective• Difficult to do what

director wants

Page 13: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Point Weighting & Attachment

• Polygonal characters attached to MoCap data

• Polygonal characters are to be more specific (ex: polygons at elbows, knees, wrist) for maximum flexibility

• Needs to have mesh proportional to bones

• Do attachment right away

Page 14: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Major Problems

• Aggressive moves that need to be stretched and twisted into radical positions tearing and deformation may occur

• Blending Technique stringing all takes

Page 15: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Software Packages for MoCap Data Implementation

• Softimage

• Alias

• 3D Studio Max

Page 16: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

3D Studio Max

This software package implements

MoCap data into a PC based Piece of

code

Page 17: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

3D Studio Max Plugins

Oxford Metrics • Does well with physique • Has key reduction capabilities to reduce

unwanted data and keep files from balooning

• Allow importation of specified segments of the file and allows moves to blend together with code applied

Page 18: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

3D Studio Max Plugins

BioVision

• Called “Motion Manager”

• File format is easy

Page 19: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

MoCap Live

Page 20: Motion Capture By: Ali Hosseini. Definition of Motion Capture Motion capture is the recording of human body movement (or other movement) for immediate

Refrences

Sturman, David. “A Brief History of Motion Capture for Computer Character Animation.” 13 March 1999. MEDIALAB. 25 Nov. 2005. http://www.siggraph.org/education/materials/HyperGraph/animation/character_animation

“When Motion Capture Beats Keyframing.” Sept. 1997. Game Developer. http://www.gdmag.com

Kines,Melianthe. “Planning and Directing Motion Capture for Games.” Gecko Interactive.