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Method and system for segmenting building roof patches from large-scale image dense matching point clouds

A dense matching, building technology, applied in the field of imaging applications

Pending Publication Date: 2019-12-13
ZHEJIANG HEXIN GEOGRAPHIC INFORMATION TECH CO LTD
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Problems solved by technology

[0019] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a method and system for segmenting building roof patches from large-scale image densely matched point clouds, focusing on how to accurately obtain building roof patches from the color 3D point cloud generated from oblique images. The problem of three-dimensional mesh of object roof

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  • Method and system for segmenting building roof patches from large-scale image dense matching point clouds

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[0135] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0136] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientations or positional relationships indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description,...

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Abstract

The invention discloses a method and a system for segmenting building roof patches from large-scale image dense matching point clouds, and aims to solve the problem of how to accurately acquire building roof three-dimensional patches from color three-dimensional point clouds generated from inclined images. The method for segmenting the building roof patch from the large-scale image dense matchingpoint cloud comprises the following steps: ground filtering and vegetation filtering; removing the ground and vegetation in the image point cloud; carrying out building monomerization; removing non-building points, and realizing building clustering; removing the vertical surface of the building; segmenting, repairing and refining the roof surface patches.

Description

technical field [0001] The present invention relates to the field of image application technology, in particular to a method and system for segmenting building roof patches from large-scale image densely matched point clouds. Background technique [0002] As an important subject of spatiotemporal information, cities are undergoing rapid changes. As a visual expression of information in a series of urban spaces such as urban topography, buildings on the ground, etc., the 3D model of urban buildings shows various information such as the geometric shape, attributes, spatial location, and texture of the target. It is an urban 3D geographic information system. The basics. Rapid extraction of buildings and detection of building changes play an important role in GIS database updates, land use, digital cities, and many other aspects. [0003] The method of the present invention uses the three-dimensional color point cloud acquired by the oblique photogrammetry system as the data s...

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Application Information

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IPC IPC(8): G06T7/10G06T7/521
CPCG06T7/10G06T7/521G06T2207/10024G06T2207/10028G06T2207/20024G06T2207/30181
Inventor 王瑞胜彭飞宇朱正荣蒲冰鑫张新梅钟若飞
Owner ZHEJIANG HEXIN GEOGRAPHIC INFORMATION TECH CO LTD
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