Table 2 The symbol table
From: Facial expression recognition using optimized active regions
Symbols | Meanings |
|---|---|
\(\theta\) | The angle that need to rotate |
I | The set of subjects in JAFFE database |
J | The set of seven expressions |
\(E_{ij}\) | Image of the ith subject and the jth expression |
C | The set of classes of active regions |
\(L_c\) | The range of the active regions size of class c |
\(bound_c\) | The max size of active regions of class c |
D | The set of four directions |
\(Dis^{cd}_{ij}\) | The distance between the center of c and the limitation in direction d of \(E_{ij}\) |
\(R^{cl}_{ij}\) | The region of with size l |
\(Hash^{cl}_i\) | The sum of the distance among all c regions of subject i with a size of l |
\(Sim^{cl}_i\) | The similarity of c regions of subject i with a size of l |
\(Sim^{cl}\) | The similarity among c regions with size l |