Object change detecting device and the object change detecting method

The present invention detects an object from an image, obtains the feature value distribution representing the shape information of the detected object, and storing the shape information represented by the acquired feature distribution, using the stored shape information , by comparing the predetermined time before the shape information and the current shape information, detects a change in the object. Here, the present invention obtains the feature distribution of the object from the processing target area extracted from the image region including the object. Further, the present invention uses the acquired accumulated shape change information from the shape information, detects a change of the object. Further, the present invention uses averaging shape change information of the shape change information by averaging, to detect changes in the object.