| 摘要 |
To attain a house change judging method and device which can judge a change with high precision and is capable of fully automating the judgment, the present invention provides a house change judging method for judging a change of a house (10) in a data acquisition region based on new/old data concerning two periods, which have been aerially acquired, including: extracting as a judgment target region (1) a predetermined region in the new data by trimming with house polygon data (3) corresponding to a predetermined region prepared in advance; computing, after the extraction, as evaluation values, two kinds of new/old difference values between the two periods with respect to a gradation value of color image data (11) and an altitude value of altitude data (12) across the entire judgment target region (1); and judging, after the computation, based on the evaluation values, whether a house change has occurred in the judgment target region (1) by referring to a judging table including combinations of two kinds of preset evaluation criterion values. |
