HOUSE CHANGE JUDGMENT METHOD AND HOUSE CHANGE JUDGMENT PROGRAM

摘要

It is an object to improve the accuracy of a house change judgment based on images and the like acquired by an airplane. An attitude by a terrain is subtracted from an attitude value of a digital surface model (DSM) acquired from an airplane or the like to generate a normalized DSM (NDSM). A judgment subject region is divided into a plurality of convex portion regions for every convex portion with a size corresponding to a house appearing on the NDSM. A house contour is extracted from each convex portion region and a house object with a three-dimensional information of the house is defined by the contour and NDSM data in the contour. The house objects acquired at two different times, respectively, are compared to detect a change between them, so that a house change is judged based on the change.