SYSTEM, METHOD, AND PROGRAM FOR DETECTING APPROACH TO OBJECT

A system for accurately detecting approach to an object by performing simple processing. The system comprises an optical flow calculating section for calculating an optical flow based on at least two time-series images; a first adding section for calculating an added value for detecting approach, by adding values corresponding to data of the optical flow assigned to a first predetermined area defined on the images, where a predetermined filter function is used in the adding calculation; a second adding section for calculating an added value for detecting vibration, by adding values corresponding to data of the optical flow assigned to a second predetermined area defined on the images, where said filter function is used in the adding calculation; and, a situation determining section for determining that approach to the object has occurred when a difference between the added values for detecting approach and vibration exceeds a predetermined threshold value.