A method for estimating an expression from feature values extracted from face images by using an expression image database on a subject such as an infant having a difficulty in emotion expression is proposed. The output value with respect to a face region from a Gabor filter is used as the feature value and inputted to an identifier to output the name of the expression. By as a database using only face images on the subject such as an infant, the expression of the subject can be recognized without using any action unit.
EMOTION EVALUATING METHOD AND EMOTION INDICATING METHOD, AND PROGRAM, RECORDING MEDIUM, AND SYSTEM FOR THE METHODS