Fig. 13
From: Facial expression recognition and histograms of oriented gradients: a comprehensive study
![Fig. 13](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40064-015-1427-3/MediaObjects/40064_2015_1427_Fig13_HTML.gif)
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