40 results about "Topological consistency" patented technology

The invention provides a building true/false change judgement method. The method specifically comprises the following steps of: firstly, determining position relationships between corresponding buildings and shadows in different phase high-definition remote sensing images of a certain urban area from shadow information on the basis of spatial topological consistency analysis; secondly, constructing local building area pairs for the buildings with corresponding relationships, wherein each of the area pairs comprises a corresponding building top edge; and finally, establishing true/false change judgement indexes on the basis of the characteristic description of building top edge structures in local building areas, comparing whether the local building areas of the corresponding buildings have similar building top edge structure information or not, and then judging whether the buildings have true/false changes. By applying the method provided by the invention, the true/false changes of the buildings can be precisely judged. The invention furthermore discloses a true/false change removal method; and by combining the building true/false change judgement method with the false change removal method, more than 90% of false change pixels can be removed, the phenomenon of accidentally removing the true change pixels is not caused, and good effect is obtained.