The use of facial motion and facial form during the processing of identityBarbara Kanppmeyer, Ian M. Thornton,

Heinrich H. Bulthoff

Presented by: Yinan Fan 2007-3-29

Face

Static? Dynamic? =>facial motions

Facial Motion?

Two Hypothesis:Representation enhancement

Help build 3D facesSupplemental information

Idiosyncratic signature of independent source of information

Dependent factors:Type of facial motionDegree of familiarity with the facesViewing condition

Weighted factors?

Weighted factors?

Facial Motion

Two categoriesRigid motionNon-rigid motion

Facial Form:= unchangeable aspectsFacial Motion:=deformable over timeInvestigate the integration of facial motion and facial form, the relavance of form cues

General Methods

ParticipantsLaser scanned heads and morphing techniquesMotion capture and animationTraining ProcedureTesting Procedure

General Methods

ParticipantsExp1: 16m/13fExp2: 12m/15fExp3: 7m/9fExp4: 7m/9fNo repetition

General Methods

ParticipantsLaser scanned heads and morphing techniques

General Methods

ParticipantsLaser scanned heads and morphing techniquesMotion capture and animation

Real actors trained for facial expressionMarkers tracked from 25f/s clilps (by famous3D Pty. Ltd :)Motion patters applied to 3D models of human faces

Animation Techniques

General Methods

ParticipantsLaser scanned heads and morphing techniquesMotion capture and animationTraining Procedure

Questionnaire assessing personality traits

General Methods

ParticipantsLaser scanned heads and morphing techniquesMotion capture and animationTraining ProcedureTesting Procedure

Experiment 1

PurposeStimuli and ProcedureResultsDiscussions

Experiment 1

Purpose:establish whether incidentally learned facial

motion patterns would bias perception

Experiment 1

PurposeStimuli and Procedure

Simuli

Procedure

Experiment 1

PurposeStimuli and ProcedureResults

Results

Result

Experiment 1

PurposeStimuli and ProcedureResultsDiscussions

Experiment 2

Purpose:More natural conditionsExp2a: Original inner featuresExp2b: Indivisual skin texture applied

Stimuli and Procedure:Each morph only five times

Results

Results

Experiment 3

PurposeUpside down face

Simuli and procedureTrained as in Exp2, tested upside down

Results

Results

Experiment 4

Purpose:“Family resemblance” taskTo eliminate effects on subtle features in the animated face

Stimuli and Procedure

Results

Finally…

Conclusion:Non-rigid facial motion biased observer’s perception of identity

Finally…

Conclusion:Non-rigid facial motion biased observer’s perception of identity

Discussion?