Fig. 13
From: Facial expression recognition and histograms of oriented gradients: a comprehensive study
Examples of expression recognition in CK+ sequences: a from Neutral to Fearful and b from Neutral to Disgusted. For each sequence the first 3 and the last 5 frames are reported i.e. the frames containing the labelled expressions. The first row reports the facial images, the second row shows the ground-truth labels and finally, in the third row, the predicted expressions are pointed out