A method of building virtual three-dimensional map

Abstract

The invention provides a virtual three-dimensional map establishing method and belongs to the field of electronic maps. The method comprises the steps that 1, an aerial video of a target building in atarget region is acquired, wherein the aerial video contains coordinate information, synchronously recorded, of a camera under a world coordinate system; 2, the aerial video is divided into video frames according to a time order, and two-dimensional coordinates of building image matching points in two frame images under the camera coordinate system are acquired; 3, the two-dimensional coordinatesof the building image matching points in the two selected frame images are converted according to internal parameters and external parameters of the camera in combination with the coordinate information of the camera under the world coordinate system, three-dimensional coordinates of the building image matching points under the world coordinate system are obtained, then three-dimensional reconstruction is performed on the building images, and building three-dimensional images are obtained; and 4, the building three-dimensional images are transplanted to corresponding positions in a satellitemap or a two-dimensional map or an existing three-dimensional map, and the virtual three-dimensional map containing the target building is obtained.

Description

technical field [0001] The invention belongs to the field of electronic maps, and more specifically relates to a method for establishing a virtual three-dimensional map. Background technique [0002] Electronic map (Electronic map), that is, digital map, is a map that is stored and consulted digitally using computer technology. Early electronic maps used bitmap storage, and the map scale could not be enlarged or reduced, which was inconvenient to use. With the development of computer technology and the advancement of various drawing and compression technologies, the current electronic map can already be stored in the form of vector image, and the scale of the map can be enlarged, reduced or rotated without affecting the display effect. [0003] With the diversification of user needs, the network 3D electronic map not only provides users with map retrieval functions such as map query and travel navigation through intuitive geographical simulation representations, but also in...

AI Technical Summary

Problems solved by technology

[0008] In view of the above defects or improvement needs of the prior art, the present invention provides a building visual positioning method and equipment, which uses the building video acquired by aerial photography to extract the video frame of the building, and matches the video frame to obtain the building The two-dimensional point coordinates of the image matching points are converted into the three-dimensional coordinates of the building image matching points, the three-dimensional reconstruction of the building is carried out, and then the three-dimensional image of the building is transplanted to the satellite map or two-dimensional map or the corresponding position in the existing three-dimensional map , to establish a virtual three-dimensional map, so as to solve the problem of incomplete three-dimensional map caused by the difficulty of taking pictures in the prior art

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