A method and a system, to generate a feature descriptor for a robust face expression recognition, preprocess a face image by using a Gaussian filter in order to smooth the face image. Images based on a gradient of the M number of scales and the N number of directions are generated from the preprocessed face image. Furthermore, a part of an image corresponding to each action unit is selected from the images of a gradient base. After the selection, the appearance of at least one face event is captured from the selected part of the image. The geometry of at least one face event is also determined in the selected part of the image in order to acquire a feature descriptor about each action unit for a robust face expression recognition.
FEATURE DESCRIPTOR FOR ROBUST FACIAL EXPRESSION RECOGNITION