Frame-Based Facial Expression Recognition Using Geometrical Features

Figure 2

Face detection along with selected facial points and extracted features. (a) Human face in neutral expression overlaid with 68 fiducial facial points [13]. (b, h) The detected face with the selected eight facial points. (c, i) Human face in happy expression. (d, j) Human face in disgust expression. (e, k) Human face in surprise expression. (f) The six geometrical features; 𝑑₁ and 𝑑₂ are the average of two mirrored values on the left and right sides of the face. (l) Human face in sadness expression. Images (a)–(e) are from Cohn-Kanade database, Jeffrey Cohn. And the images (g)–(l) are samples from BU-4DFE.

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