House change determining method, house change determining program, house change determining image generating method, and house change determining image

A house change judgment program for causing a computer to execute:

• a house region extraction procedure of extracting a house region in which a house exists from a judgment target region based on house shape data acquired in advance;
• a feature region extraction procedure of extracting, based on digital surface model data expressed by an altitude of an above-ground surface including a feature, a feature region in which the feature exists, the digital surface model data being acquired from above with regard to each point within the judgment target region;
• and
• a candidate region presentation procedure of comparing the house region and the feature region to obtain a difference region therebetween, and presenting, to a person who makes a judgment regarding a house change, the difference region as a candidate region of house change occurrence between a time point at which the house shape data is acquired and a time point at which the digital surface model data is acquired.

A method of generating an image for house change judgment, comprising:

• a house region extraction step of extracting a house region in which a house exists from a judgment target region based on house shape data acquired in advance;
• a feature region extraction step of extracting, based on digital surface model data expressed by an altitude of an above-ground surface including a feature, a feature region in which the feature exists, the digital surface model data being acquired from above with regard to each point within the judgment target region;
• and
• an image-for-house-change-judgment generation step of comparing the house region and the feature region to obtain a difference region therebetween, setting the difference region as a candidate region of house change occurrence between a time point at which the house shape data is acquired and a time point at which the digital surface model data is acquired, and generating the image for house change judgment in which the candidate region is displayed in a discriminable manner in a ground surface image photographed from above.