Three-dimensional city-model rapid updating method

A city model and update method technology, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as image distortion and projection deformation, and achieve the effect of solving image distortion deviation and wide application prospects.

Active Publication Date: 2017-06-20
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

However, due to these ordinary cameras that have not been calibrated and the photographers, these images have problems of distortion and projection deformation. How to geometrically locate the position of these images and correct the distortion and deformation is the primary problem.

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Embodiment Construction

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for ...

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Abstract

The invention provides a three-dimensional city-model rapid updating method. The method comprises the following steps of S101, collecting street view photos of different visual angles of changed areas in a three-dimensional city; S102, analyzing a three-dimensional city model and positioning an area of the changed areas in the three-dimensional city model; S103, according to buildings in the three-dimensional city model, establishing an image characteristic database; S104, carrying out three-dimensional space change detection on the three-dimensional city and determining the updated and reconstructed building; S105, carrying out characteristic matching on the street view photos of the different visual angles; and S106, carrying out precise integration on the updated and reconstructed building and a background three-dimensional model. The three-dimensional city-model rapid updating method is based on existing three-dimensional city data. An invariant in existing old data is taken as a precision source of updated data correction so as to carry out precision control on new data. Therefore, a common street view photo image correction problem is solved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional city modeling, in particular to a method for quickly updating a three-dimensional city model. Background technique [0002] Large-scale, high-precision, and fast fully automatic 3D modeling technology for cities has always been the main research direction in the field of photogrammetry and digital cities. The main technical means of accurate and effective urban 3D reconstruction that have been proven so far include: (1) Stereo measurement of airborne area array or multi-line array CCD aerial survey camera; (2) Airborne LiDAR point cloud measurement combined with high-precision two-dimensional images; ( 3) Airborne multi-camera oblique photogrammetry; (4) Vehicle-mounted LiDAR point cloud measurement auxiliary panoramic photos, combined with aerial two-dimensional data; (5) Fully manual 3Dmax modeling. [0003] The above technologies and methods provide many options for large-scale, fast...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
CPCG06T17/00G06T2200/04
Inventor 刘萍陈会孙博姜小砾
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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