EMBODYING GESTURE PROCESSING A Computational Cognitive Model for Humanoid Virtual Agents
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1 EMBODYING GESTURE PROCESSING A Computational Cognitive Model for Humanoid Virtual Agents Amir Sadeghipour PhD Sociable Agents Group Bielefeld University, Germany Supervisor: Prof. Stefan Kopp
2 Intro Investigating human social behavior
3 Intro Investigating human social behavior Psychology, Neurobiology, Linguistic & Philosophy
4 Intro Investigating human social behavior Psychology, Neurobiology, Linguistic & Philosophy Computational cognitive model of social behavior for humanoid virtual agents
5 Outline Goal: Gesture Processing Computational Cognitive Model Results Conclusion Outlook
6 Outline Goal: Gesture Processing Computational Cognitive Model Results Conclusion Outlook
7 Goal Motor Cognition encompasses all processes involved in the production and comprehension of one s own and others actions
8 Goal Motor Cognition encompasses all processes involved in the production and comprehension of one s own and others actions Planning Understanding Anticipating Generating Recognizing Perceiving
9 Goal
10 Goal Grounded cognition: Brain s modal simulation underlies cognition
11 Goal Grounded cognition: Brain s modal simulation underlies cognition Simulation: The reenactment of the neural representation networks, which arises during perceiving and acting
12 Goal Grounded cognition: Brain s modal simulation underlies cognition Simulation: The reenactment of the neural representation networks, which arises during perceiving and acting Embodied cognition: Cognition is grounded in the same neural representations that underlie perception, action and imagination
13 Goal Requirements dimensions Perception Generation
14 Goal Requirements dimensions Semantics Perception Generation Motor Capabilities
15 Goal Requirements dimensions Semantics Perception Understanding Perception Generation Motor Capabilities
16 Goal Requirements dimensions Semantics Intention Generation Perception Generation Motor Capabilities
17 Goal Requirements dimensions Semantics Perception Generation Perception Generation Motor Capabilities
18 Goal Requirements dimensions Semantics Perception Generation Perception Mimicry Generation Alignment Priming Motor Capabilities
19 Goal Requirements dimensions Semantics Perception Generation Perception Mimicry Generation Alignment Priming Motor Capabilities
20 Goal Requirements dimensions Semantics Simulation Emulation Perception Generation Perception Imitation Mimicry Generation Alignment Priming Motor Capabilities
21 Goal Requirements dimensions Semantics Simulation Emulation Perception Generation Perception Imitation Mimicry Generation Alignment Priming Motor Capabilities
22 Outline Goal: Gesture Processing Computational Cognitive Model Results Conclusion Outlook
23 Model The overall model Sensors Perception Shared Motor Knowledge Generation Actuators
24 Model The overall model Sensors Perception Shared Motor Knowledge Generation Actuators
25 Model The overall model > Shared Motor Knowledge Shared Motor Knowledge Forward Models Motor schemas Motor Programs Motor Commands Inverse Models
26 Model The overall model > Shared Motor Knowledge Shared Motor Knowledge Forward Models Motor schemas Motor Programs Motor Commands Inverse Models
27 Model The overall model > Shared Motor Knowledge > Gesture Representation Motor Schemas Motor Programs Motor Commands
28 Model The overall model > Shared Motor Knowledge > Gesture Representation Motor Schemas Motor Programs waving1 waving2 circle1 Motor Commands
29 Model The overall model > Shared Motor Knowledge > Gesture Representation Motor Schemas waving circle Motor Programs waving1 waving2 circle1 Motor Commands
30 Model The overall model > Shared Motor Knowledge Shared Motor Knowledge Forward Models Motor schemas Motor Programs Motor Commands Inverse Models
31 Model The overall model > Shared Motor Knowledge > Forward Models Forward Models Shared Motor Knowledge Motor schemas Motor Programs Motor Commands Inverse Models
32 Model Forward models P (h o) =αp (o h)p (h)
33 Model Forward models P (h o) =αp (o h)p (h) P T (h o) := 1 T T αp t (o t h)p t (h) t=1
34 Model Forward models P (h o) =αp (o h)p (h) P T (h o) := 1 T T t=1 αp t (o t h)p t (h) P T (h o) := 1 T T αp t (o t h)p t 1 (h o t 1 ) t=1
35 Model Forward models: Bottom-up perception MS MP MC l MC r
36 Model Forward models: Bottom-up perception MS MP P T (mc o) := 1 T T αp t (o t mc)p t 1 (mc o) t=1 MC l MC r
37 Model Forward models: Bottom-up perception MS P T (mp o l,o r ):= 1 T T t=1 i {l,r} mc MC i αp t (o t,i mc)p (mc mp)p t 1 (mp o l,o r ) MP P T (mc o) := 1 T T αp t (o t mc)p t 1 (mc o) t=1 MC l MC r
38 Model Forward models: Bottom-up perception P T (ms o l,o r ):= 1 T T αp t (o t mc)p (mc mp)p (mp ms)p t 1 (ms o l,o r ) t=1 i {l,r} mc MC i mp MP MS P T (mp o l,o r ):= 1 T T t=1 i {l,r} mc MC i αp t (o t,i mc)p (mc mp)p t 1 (mp o l,o r ) MP P T (mc o) := 1 T T αp t (o t mc)p t 1 (mc o) t=1 MC l MC r
39 Model Forward models: Bottom-up perception P T (ms o l,o r ):= 1 T T αp t (o t mc)p (mc mp)p (mp ms)p t 1 (ms o l,o r ) t=1 i {l,r} mc MC i mp MP MS P T (mp o l,o r ):= 1 T T t=1 i {l,r} mc MC i αp t (o t,i mc)p (mc mp)p t 1 (mp o l,o r ) MP P T (mc o) := 1 T T αp t (o t mc)p t 1 (mc o) t=1 MC l MC r
40 Model Forward models: Bottom-up perception MS MP P T (mc o) := 1 T T αp t (o t mc)p t 1 (mc o) t=1 MC l MC r
41 Model Forward models: Bottom-up & Top-down P T (ms o l,o r ):= 1 T T αp t (o t mc)p (mc mp)p (mp ms)p t 1 (ms o l,o r ) t=1 i {l,r} mc MC i mp MP MS P T (mp o l,o r ):= 1 T T t=1 i {l,r} mc MC i αp t (o t,i mc)p (mc mp)p t 1 (mp o l,o r ) MP P T (mc o) := 1 T T αp t (o t mc)p t 1 (mc o) t=1 MC l MC r
42 Model Forward models: Top-down belief guidance MS P t (mp MS):= ms MS αp (mp ms)p t (ms)p t 1 (mp MS) MP P t (mc MP):= αp (mc mp)p (mp ms)p t (ms)p t 1 (mc MP) ms MS mp MP MC l MC r
43 Model The overall model > Shared Motor Knowledge Shared Motor Knowledge Forward Models Motor schemas Motor Programs Motor Commands Inverse Models
44 Model The overall model > Shared Motor Knowledge > Inverse Models Forward Models Shared Motor Knowledge Motor schemas Motor Programs Motor Commands Inverse Models
45 Model The overall model > Shared Motor Knowledge > Inverse Models Forward Models Shared Motor Knowledge Motor schemas Motor Programs Motor Commands Inverse Models
46 Model Inverse models: Learning motor skills through SOM
47 Model The overall model > Shared Motor Knowledge Shared Motor Knowledge Forward Models Motor schemas Motor Programs Motor Commands Inverse Models
48 Model The overall model Sensors Perception Shared Motor Knowledge Generation Actuators
49 Model Integration of perception and generation through neural activation
50 Model Integration of perception and generation activation(m, t) = 1, m is being performed at t P t (m), m is being observed with probability P at t decrease(m), otherwise
51 Model Integration of perception and generation activation(m, t) = 1, m is being performed at t P t (m), m is being observed with probability P at t decrease(m), otherwise Perception (t) Generation (t) Perception (t-1) Generation (t-1)
52 Model Integration of perception and generation activation(m, t) = 1, m is being performed at t P t (m), m is being observed with probability P at t decrease(m), otherwise Perception (t) Generation (t) Perception (t-1) Self-Priming Generation (t-1)
53 Model Integration of perception and generation activation(m, t) = 1, m is being performed at t P t (m), m is being observed with probability P at t decrease(m), otherwise Perception (t) Generation (t) Perception (t-1) Self-Priming Motor resonance (Priming, Alignment) Generation (t-1)
54 Model Integration of perception and generation activation(m, t) = 1, m is being performed at t P t (m), m is being observed with probability P at t decrease(m), otherwise Perception (t) Generation (t) Perception (t-1) Self-Priming Motor resonance (Priming, Alignment) Generation (t-1) Perceptual resonance
55 Model Integration of perception and generation activation(m, t) = 1, m is being performed at t P t (m), m is being observed with probability P at t decrease(m), otherwise Perception (t) Generation (t) Perception (t-1) Self-Priming Motor resonance (Priming, Alignment) Generation (t-1) Perceptual resonance Self-Priming
56 Results Goal: Gesture Processing Computational Cognitive Model Results Conclusion Outlook
57 Results Demo1: Recognition & Generation
58 Results Demo2: Imitation learning
59 Results Demo2: Recognizing
60 Results Motor resonance = Embodied recognition Bottom-Up
61 Results Motor resonance = Embodied recognition Bottom-Up Top-Down + Bottom-Up
62 Results Perception Generation Perception Generation Generation Perception
63 Results Goal: Gesture Processing Computational Cognitive Model Results Conclusion Outlook
64 Conclusion A computational cognitive model for humanoid virtual agents, to perceive, recognize (embodied), generate and learn hand gestures The integration of perception and generation at different levels of abstraction, which accounts for different social capabilities and characteristics.
65 Results Goal: Gesture Processing Computational Cognitive Model Results Conclusion Outlook
66 Outlook The overall model Sensors Perception Shared Motor Knowledge Generation Actuators
67 Outlook The overall model Shared Motor Knowledge Sensors Perception MS Generation Actuators MP MC
68 Outlook Higher level? Shared Motor Knowledge? Sensors Perception MS Generation Actuators MP MC
69 Outlook Cross-modal interaction Shared Multimodal Knowledge Sensors Perception MS MP? Generation Actuators MC Motor Visual
70 Outlook Representation of concepts Shared Multimodal Knowledge Sensors MS MP?? Perception Generation Actuators MC Motor Visual Language
71 Thanks!
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