Patent ID: 7715598

Claim:
A method for detecting facial expressions of a portrait photo by an image capturing electronic device, being used for an electronic image capturing device, and comprising the steps of: capturing a current image; detecting a position and a range of a human face on a portrait photo; detecting a position and a range of an opened facial feature or a closed facial feature such as an eye or a mouth; magnifying an identified range of a position of said facial feature according to a predetermined proportion, and cutting said facial feature and a patch within a predetermined surrounding range by said magnified identified range, and said patch being capable of showing a picture with a change of said facial feature and a facial expression in said predetermined surrounding range; and training a facial expression detector by a predetermined number of opened or closed facial feature samples, and detecting an opened state or a closed state of said facial feature in said patch to determine whether or not said facial feature is situated at an opened state or a closed state.