Method for interactively selecting coordinate points on surface of object based on point cloud data

A technology of object surface and point cloud data, applied in image data processing, 3D modeling, instruments, etc., can solve the problem of lack of interactive processing methods and achieve the effect of interactive operation

Active Publication Date: 2014-07-09
杭州瓦屋科技有限公司
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Problems solved by technology

At present, most of the point cloud processing methods focus on reverse engineering and feature extraction (feature points, skeletons, etc.), lac

Method used

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  • Method for interactively selecting coordinate points on surface of object based on point cloud data
  • Method for interactively selecting coordinate points on surface of object based on point cloud data
  • Method for interactively selecting coordinate points on surface of object based on point cloud data

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Embodiment

[0036] Embodiment: a method for interactively selecting object surface coordinate points based on point cloud data; figure 1 , diagram 2-1 , Figure 2-2 , image 3 , Figure 4 , Figure 5 As shown; this method is mainly composed of (1) rendering the surface of the object from the point cloud data; it is used to render the collected point cloud data on the computer screen, and determine the position of the pixel; (2) solve the user's line of sight The user's line of sight equation passing through a given pixel point; (3) filter the point cloud near the line of sight; (4) extract the effective point set in the point cloud near the user's line of sight; (5) fit the effective point set by the surface; (6) solve The intersection of the line of sight and the fitting surface is realized in six steps. In order to realize the method of interactively selecting coordinate points on the surface of an object, this embodiment will describe the above six steps in detail.

[0037] First...

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Abstract

The invention discloses a method for interactively selecting coordinate points on the surface of an object based on point cloud data. The method aims at solving the technical problem that in current point cloud data processing, the method for interactively selecting the coordinate points on the surface of the object is lacked. The method is achieved through the total six steps that firstly, rendering of the point cloud data is performed; secondly, a user sight equation passing through given pixel points is solved; thirdly, a point cloud near the sight of a user is screened; fourthly, an effective point set in the point cloud near the sight of the user is extracted; fifthly, surface fitting of the effective point set is performed; sixthly, the intersection point of the sight of the user sight and a fitting curve is solved. By means of the method, window actions of a mouse can be mapped to be operation of the surface of the object, and therefore interactive operation of the point cloud data is achieved.

Description

technical field [0001] The invention relates to the field of analysis and processing of point cloud data, in particular to a method for interactively selecting object surface coordinate points based on point cloud data. Background technique [0002] With the maturity of 3D laser scanning technology, it has become a reality to quickly obtain a large number of high-precision coordinate point clouds on the surface of objects. In recent years, scholars at home and abroad have done a lot of research on point cloud denoising, simplification, feature estimation, feature point (line) extraction, skeleton extraction, surface reconstruction, etc. — Surface Reconstruction of Point Cloud Reconstruction" is the main method of reverse engineering development, which greatly promotes the application of point cloud in virtual reality, biomedicine, reverse engineering and other fields. At present, most point cloud processing methods focus on reverse engineering and feature extraction (featur...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T19/00
Inventor 席磊汪强马新明侯志远张浩郑光冀亚丽徐鑫
Owner 杭州瓦屋科技有限公司
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