| <Poster Width="1734" Height="1966"> |
| <Panel left="39" right="207" width="822" height="389"> |
| <Text>Expression-invariant face recognition</Text> |
| <Text>1. Facial expression affects the performance of a face recognition</Text> |
| <Text>2. Expression changes face geometry, but texture is stable.</Text> |
| <Text>3. We conduct recognition based on texture /geometry separately.</Text> |
| <Text>Related works</Text> |
| <Text>Related works</Text> |
| <Text>Separately modeling texture and geometry information in</Text> |
| <Text>different eigenspaces has been applied in ASM and AAM (by</Text> |
| <Text>Cootes et al.), however our eigenspaces aim at distinguishing</Text> |
| <Text>individuals and expressions.</Text> |
| </Panel> |
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| <Panel left="37" right="597" width="823" height="795"> |
| <Text>Feature spaces and recognition methods</Text> |
| <Text>Space1: Texture space V</Text> |
| <Text>tex : eigenspace of warped face textures.</Text> |
| <Text>Space2: Angle space V</Text> |
| <Text>ang : eigenspace of the weighted inner angles</Text> |
| <Text>of masks. Angle weight is the inverse of the angle variance in</Text> |
| <Text>natural warpings of training faces.</Text> |
| <Text>Face recognition: the projection of testing face into V</Text> |
| <Text>tex and V</Text> |
| <Text>ang</Text> |
| <Text>are used as two attributes in face recognition by distinguishing</Text> |
| <Text>natural warpings from artificial warpings. A testing face is</Text> |
| <Text>recognized as the same individual in a reference face if both</Text> |
| <Text>attributes are similar.</Text> |
| <Text>Space3: Angle residual space V</Text> |
| <Text>res : eigenspace of the angle</Text> |
| <Text>changes during natural warping.</Text> |
| <Figure left="228" right="1072" width="364" height="185" no="1" OriWidth="0.301615" OriHeight="0.11943 |
| " /> |
| <Text> Warping from “surprise” to “normal”</Text> |
| <Text>Expression classification: compare the geometry of a testing</Text> |
| <Text>face with that of the recognized reference face in V</Text> |
| <Text>res.</Text> |
| </Panel> |
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| <Panel left="874" right="205" width="823" height="391"> |
| <Text>Mask fitting and warping</Text> |
| <Figure left="947" right="284" width="152" height="140" no="2" OriWidth="0.247405" OriHeight="0.177362 |
| " /> |
| <Text> 34 vertexes and</Text> |
| <Text>51 triangles</Text> |
| <Text> Normal</Text> |
| <Text>faces</Text> |
| <Text> Expressioned faces</Text> |
| <Figure left="1177" right="316" width="357" height="193" no="3" OriWidth="0.374856" OriHeight="0.194742 |
| " /> |
| <Text> Natural</Text> |
| <Text>warpings</Text> |
| <Text>VS</Text> |
| <Text>Artificial</Text> |
| <Text>warpings</Text> |
| <Text>Natural warping: warping from test face to the reference face of the same individual.</Text> |
| <Text>Artificial warping: warping from test face to the reference face of a different individual.</Text> |
| </Panel> |
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| <Panel left="874" right="600" width="825" height="792"> |
| <Text>Results of face recognition</Text> |
| <Figure left="1037" right="658" width="496" height="296" no="4" OriWidth="0.328143" OriHeight="0.14795 |
| " /> |
| <Text>Results of expression classification: 84%</Text> |
| <Figure left="1040" right="1026" width="491" height="343" no="5" OriWidth="0.357555" OriHeight="0.203209 |
| " /> |
| </Panel> |
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| <Panel left="34" right="1394" width="1666" height="481"> |
| <Text>Extension: face recognition on noisy 3D face scan:</Text> |
| <Text>1. Expression affects 3D face recognition</Text> |
| <Text>more seriously, since most geometric</Text> |
| <Text>features will be mis-aligned.</Text> |
| <Text>2. 3D face mask carries face shape</Text> |
| <Text>information. The displacement from </Text> |
| <Text>mask to its original face carries face</Text> |
| <Text>surface feature.</Text> |
| <Text>3. In a natural warping, an expressioned</Text> |
| <Text>face will approach its reference face, by</Text> |
| <Text>removing expression. In an artificial</Text> |
| <Text>warping, however, face surface features</Text> |
| <Text>of testing face will be distorted.</Text> |
| <Figure left="617" right="1463" width="506" height="396" no="6" OriWidth="0" OriHeight="0 |
| " /> |
| <Figure left="1178" right="1407" width="519" height="463" no="7" OriWidth="0" OriHeight="0 |
| " /> |
| </Panel> |
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| </Poster> |
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