Laser point cloud ground target structural characteristic repairing method based on CCD picture

A target structure and laser point cloud technology, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as lack of a relatively complete and comprehensive point cloud repair solution

Active Publication Date: 2016-10-12
QINGDAO XIUSHAN MOBILE SURVEYING CO LTD
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Problems solved by technology

The traditional point cloud patching research is aimed at the point cloud interpolation of fixed single-station scanners, but currently there are few researches on point cloud patching based on vehicle-mounted mobile measurement, and there is no relatively complete and comprehensive point cloud patching solution

Method used

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  • Laser point cloud ground target structural characteristic repairing method based on CCD picture
  • Laser point cloud ground target structural characteristic repairing method based on CCD picture
  • Laser point cloud ground target structural characteristic repairing method based on CCD picture

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Embodiment Construction

[0081] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0082] Such as figure 1 As shown, a laser point cloud object structure feature repair method based on CCD photos, including the following steps:

[0083] a. Convert the original point cloud data into a projected coordinate system with X and Z as projection planes, and Y direction pointing to the shooting direction of supplementary shooting, so as to generate a projected distance image; this step a specifically includes:

[0084] a1. Converted to the projected coordinate system of the shooting direction

[0085] Convert the original point cloud data into a projected coordinate system with X and Z as the projection plane, and the Y direction pointing to the shooting direction of the supplementary shooting;

[0086] a2. Generate projection distance image

[0087] According to the converted projected coordinate system, with X and Z as the image p...

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Abstract

The invention discloses a laser point cloud ground target structural characteristic repairing method based on a CCD picture. The method comprises the steps of firstly generating a projection distance image which is similar with a CCD picture photographing angle according to existing point cloud data, recording a conversion relationship between the point cloud and the projection distance image; then performing image matching on the projection distance image and the CCD picture which is re-photographed at a later period, and obtaining spatial relative relation between the two images; after image matching, selecting a reference point from a same plane in which a to-be-repaired position of the projection distance image exists, finding out the to-be-repaired position from the re-photographed CCD picture, and back-calculating the distance of the to-be-repaired position according to the spatial relative relation of the images; furthermore back-calculating the actual point cloud coordinate of the to-be-repaired position according to the conversion relationship between the point cloud and the projection distance image; and finally realizing characteristic repairing of point characteristic, line characteristic and surface characteristic on the point cloud according to the reduced characteristic point through technology such as line encryption and surface encryption.

Description

technical field [0001] The invention belongs to the technical field of vehicle-mounted laser scanning point cloud data processing, and in particular relates to a method for repairing structural features of laser point cloud objects and objects based on CCD photos. Background technique [0002] High-precision, accurate and complete vehicle-mounted laser scanning point cloud data is the basis for 3D reconstruction and ground object feature extraction. Due to the unavoidable occlusion of ground objects in the field measurement process, the obtained original point cloud data often has data missing, and the original point cloud data needs to be repaired. The traditional point cloud patching research is aimed at the point cloud interpolation of fixed single-station scanners, but currently there are few researches on point cloud patching based on vehicle-mounted mobile measurement, and there is no relatively complete and comprehensive point cloud patching solution. Therefore, how ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30
CPCG06T17/30
Inventor 刘如飞卢秀山田茂义刘甜侯海龙
Owner QINGDAO XIUSHAN MOBILE SURVEYING CO LTD
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