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Method for quantitatively evaluating distribution quality of targets in point cloud registration

A technology of distribution quality and point cloud registration, which can be used in image analysis, image enhancement, instrumentation, etc., and can solve problems such as inability to quantitatively evaluate

Inactive Publication Date: 2017-05-17
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for quantitatively evaluating the quality of target distribution in point cloud registration, which overcomes the shortcomings of existing theories and technologies that can only qualitatively evaluate the quality of target distribution and cannot be quantitatively evaluated

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  • Method for quantitatively evaluating distribution quality of targets in point cloud registration
  • Method for quantitatively evaluating distribution quality of targets in point cloud registration
  • Method for quantitatively evaluating distribution quality of targets in point cloud registration

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Embodiment Construction

[0053] In specific implementation, we often encounter three kinds of actual situations, and the present invention will be further described below in conjunction with the accompanying drawings and actual situations.

[0054] Actual situation 1 "The target has been fixed, and the best erection position of the scanner to be registered needs to be determined"

[0055] by process figure 2 Implementation, calculate the tDOP value of the scanner erection position, find the position with the smallest tDOP value as the best scanner erection position (corresponding to the above steps ⑦~⑩), the detailed steps for calculating the tDOP value are as follows:

[0056] First, select m in the point cloud of the target scene 2 Alternative Scanner Mounting Locations

[0057] Then, choose 1 position from the alternative positions o j , as an erection scheme of the scanner, its coordinates are (t x0 ,t y0 ,t z0 );

[0058] Then, from the coordinate information of the target, the position...

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Abstract

The invention discloses a method for quantitatively evaluating the distribution quality of targets in a point cloud registration. The method comprises the following implementation steps of: (1) judging whether the positions of the targets are known, if so, carrying out step (3), and if not, acquiring alternative positions for distributing the targets; (2) selecting a target distribution scheme from the alternative positions; (3) calculating a corresponding rDOP value thereof; (4) evaluating the target distribution quality by the rDOP value, wherein the scheme with minimum rDOP value is an optimal distribution scheme; (5) judging whether the positions of scanners are known, if so, carrying out step (7), and if not, acquiring alternative positions for erecting the scanners; (6) selecting a position from the alternative positions; (7) calculating a tDOP value corresponding to the position; and (8) evaluating the erecting quality of the scanners by the tDOP value, wherein the position with minimum tDOP value is the optimal erecting position. The method disclosed by the invention has the advantages that the quantitative evaluation on the quality of target distribution by a rDOP model and a tDOP model is proposed for the first time to help users determine the optimal distribution schemes for the targets and the scanners, so that the uncertainty of the existing distribution only by experiences is overcome. The method is convenient in use and strong in operability.

Description

technical field [0001] The invention belongs to the field of three-dimensional laser scanning point cloud registration, in particular to a quantitative evaluation method for target distribution quality in the field of point cloud registration. Background technique [0002] Terrestrial laser scanning technology can conveniently and quickly obtain the surface space information of the target. The information density and accuracy of the obtained information are much higher than the traditional surveying and mapping technology. It is widely used in reverse engineering, cultural relic scanning, surveying and mapping industries and other fields. Due to the occlusion of objects or the limitation of the scanning range of the scanner, under normal circumstances, it is necessary to scan the target from multiple stations in different directions to obtain the complete surface information of the target, and the point clouds obtained by different stations belong to different independent coo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/30G06K9/62
CPCG06T2207/10028G06F18/2193
Inventor 杨荣华游扬声潘蕾西兰万震方西南
Owner CHONGQING UNIV
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