House contour extraction method based on two-dimensional orthoimage

The invention discloses a house contour extraction method based on a two-dimensional orthoimage, and the method comprises the steps: firstly obtaining an original image of a to-be-extracted house contour region, obtaining sub-images covering all regions of the original image through image traversal according to the original image, loading the sub-images into a house detection model one by one, and carrying out the extraction of the house contour region. The method comprises the following steps of: acquiring a rectangular image of each house in each sub-image, inputting an acquired rectangular area image of each house into a fuzzy contour extraction network model, acquiring a fuzzy contour grey-scale map of each image, setting a pixel in a rectangular area of one sixteenth of the middle of the acquired fuzzy contour grey-scale map to be zero, and acquiring a fuzzy contour grey-scale map of each image; a house area binary image is obtained from the obtained grey-scale image through a water injection filling met