Building roof outline recognizing device, building roof outline recognizing method, and building roof outline recognizing program

A building roof outline recognition method, comprising:

• a marker region extraction step of extracting a region having at least a part thereof included in a roof as a marker region for each building from a recognition target region of a building roof outline based on surface data that is captured from above and that represents a height above sea level of a ground surface including a feature;
• a roof candidate region extraction step of extracting, as a roof candidate region, a region having commonality with the marker region with regard to the surface data and an aerial photograph image, using a region growing method with the marker region set as a core;
• and
• a periphery boundary shaping step of extracting an edge fitting with an outer shape of the roof candidate region from among edges appearing in the aerial photograph image, and determining a periphery boundary that is the building roof outline.

A building roof outline recognition program for controlling a computer to execute:

• a marker region extraction step of extracting a region having at least a part thereof included in a roof as a marker region for each building from a recognition target region of a building roof outline based on surface data that is captured from above and that represents a height above sea level of a ground surface including a feature;
• a roof candidate region extraction step of extracting, as a roof candidate region, a region having commonality with the marker region with regard to the surface data and an aerial photograph image, using a region growing method with the marker region set as a core;
• and
• a periphery boundary shaping step of extracting an edge fitting with an outer shape of the roof candidate region from among edges appearing in the aerial photograph image, and determining a periphery boundary that is the building roof outline.