The EMOTE Model for Effort and Shape

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The EMOTE Model for Effort and Shape

• Diane Chi, Monica Costa, Liwei Zhao, Norman
  Badler
• Center for Human Modeling and Simulation
• University of Pennsylvania

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Outline

• Introduction
• Background
• Expressive Arms
• Expressive Torso
• Examples

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Introduction

• McNeils gesture model
• Use human observers to manually note and
  characterize a subjects gestures
• The difficulty is hidden within the decision to
  call something a gesture.

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Introduction (cont.)

• Gesture is any movement of any body part in
  which Effort or Shape elements or combinations
  can be observed.
• Laban Movement Analysis (LMA)
• Approach
• Sequence and phrasing
• Spreading to the whole body

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Background

• LMA by Rudolf Laban (1879 1958)
• Body
• The parts of the body used
• Space
• Locale, directions, paths

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Background (cont.)

• Shape
• Bodys changing form
• Effort
• How body concentrates its exertion
• Relationship
• Modes of interaction with oneself, others, and
  the environment

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Effort Elements
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Shape Components

• Shape Dimensions
• Horizontal, Vertical, Sagittal
• Reach Space

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Expressive Arms

• Keypoints end-effector positions
• Global vs. Local
• Goal vs. Via
• Arm model

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Applying Shape to Arm Movements

• Reach Space
• Moving along the path through the keypoint and
  the center of mass of the human figure

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Trajectory Definition

• Path curvature by Tval -1, 1
• Interpolation Space
• End-effector position default
• Joint angle free
• Elbow position indirect

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Parameterized Timing Control

• s 0,1 interpolation parameter over the
  interval from keypoint i to keypoint i1
• P(s,i) trajectory function
• t 0,1 relative time between keypoints

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Parameterized Timing Control (cont.)

• Q(t, I ) s
• Parameters
• Number of frames between keypoints
• I inflection time ti, time exponent texp, start
  velocity v0, and end velocity v1

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Q is the integral of v
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Flourishes
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Parameter Settings
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Expressive Torso
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Examples

• http//hms.upenn.edu/software/EMOTE/media.html

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Comment
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Q AThank you!