1. An image determining method for determining a pictured status of a predetermined subject in an image shot by a camera, comprising: extracting a feature point characterizing a position of the subject based on information on an area where the subject is present; and determining the pictured status of the predetermined subject by determining whether an object is the predetermined subject or not based on a position of the feature point of the predetermined subject extracted in the extracting and a position of the object present between the feature point and the camera.