Patent ID: 8682064
Filing Date: 2014-03-25
Classification: G06T

Abstract:
1. A building change detection apparatus for detecting a change in a building in a predetermined area on a map between a first time point and a second time point later than the first time point, the apparatus comprising: a first image data acquiring unit that acquires first image data of the predetermined area photographed at the first time point; a second image data acquiring unit that acquires second image data of the predetermined area photographed at the second time point; a feature change detecting unit that compares the first image data with the second image data to detect changes in features including a building in the predetermined area; a building absent area specifying unit that specifies a building absent area in the predetermined area where a building is not present; and a building change detecting unit that detects a change in a building in the predetermined area by setting a feature whose change is detected by the feature change detecting unit in the predetermined area from which the building absent area is excluded, as a changed building in the predetermined area, wherein the building absent area specifying unit comprises a tree area specifying unit that specifies a tree area in the predetermined area where a tree is present, as the building absent area, based on at least one of the first image data and the second image data, and wherein the building change detecting unit detects a change in a building in the predetermined area by excluding a feature that is present in the tree area specified by the tree area specifying unit from a feature whose change is detected by the feature change detecting unit, wherein the first image data includes first color image data photographed in color, and first infrared image data photographed by infrared, wherein the second image data includes second color image data photographed in color, and second infrared image data photographed by infrared, wherein the feature change detecting unit comprises: wherein the tree area specifying unit comprises: wherein the building change detecting unit comprises: