Patent ID: 8259993
Filing Date: 2012-09-04
Classification: G01C,G06K,G06T

Abstract:
1. A building shape change detecting method, comprising: a photographing step of photographing a ground surface image from an aircraft; an observation feature point extracting step of extracting, on the aircraft, an observation feature point corresponding to a ground object from the photographed ground surface image; a data transmitting step of transmitting data representative of the observation feature point from the aircraft to a ground station in a wireless manner; a building projected image producing step of performing, at the ground station, a projection calculation based upon (i) building shape recording information which has previously been stored, and (ii) both a flying position and a flying attitude of the aircraft when the photographed ground surface image was photographed, and producing a building projected image as viewed from the flying position; and a change detecting step of comparing, at the ground station, the observation feature point with the building projected image, and detecting a change in the building shape, wherein the observation feature point extracting step extracts pixels as the observation feature points, which constitute an edge, from the photographed ground surface image corresponding to a digital image.