17. A method for detecting talking and non-talking segments in a sequence of image frames, the method comprising: detecting, by a processor, a face region in the sequence of image frames by anchoring a location of pupils of a face; determining whether the face of the face region is talking or not talking; when the face is not talking, obtaining features of an entire portion of the face; when the face is talking, obtaining features of an upper portion of the face; and inferring at least one emotion of the face region using action units that are predicted based on the obtained features.
17. A method for detecting talking and non-talking segments in a sequence of image frames, the method comprising: detecting, by a processor, a face region in the sequence of image frames by anchoring a location of pupils of a face; determining whether the face of the face region is talking or not talking; when the face is not talking, obtaining features of an entire portion of the face; when the face is talking, obtaining features of an upper portion of the face; and inferring at least one emotion of the face region using action units that are predicted based on the obtained features. 18. The method of claim 17 , wherein the action units represent muscular activity producing facial appearance changes as defined a Facial Action Coding System (FACS).