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Table 1 Salient facial patches under different head poses

From: Non-frontal facial expression recognition based on salient facial patches

Head pose Salient facial patches Number of patches
90° P1, P2, P3, P7, P8, P9, P10, P14, P16, P17, P18, P20 12
45° P1, P2, P3, P7, P8, P9, P10, P14, P16, P17, P18, P20 12
P1–P20 20
− 45° P4, P5, P6, P10, P11, P12, P13, P15, P16, P17, P19, P20 12
− 90° P4, P5, P6, P10, P11, P12, P13, P15, P16, P17, P19, P20 12