Apparatus, methods, and articles of manufacture facilitate analysis of a person's affective valence and arousal. A machine learning classifier is trained using training data created by (1) exposing individuals to eliciting stimuli, (2) recording extended facial expression appearances of the individuals when the individuals are exposed to the eliciting stimuli, and (3) obtaining ground truth of valence and arousal evoked from the individuals by the eliciting stimuli. The classifier is thus trained to analyze images with extended facial expressions (such as facial expressions, head poses, and/or gestures) evoked by various stimuli or spontaneously obtained, to estimate the valence and arousal of the persons in the images. The classifier may be deployed in sales kiosks, online trough mobile and other devices, and in other settings.
ESTIMATION OF AFFECTIVE VALENCE AND AROUSAL WITH AUTOMATIC FACIAL EXPRESSION MEASUREMENT