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Method for three-dimensional data registration based on flexible feature points

A technology of three-dimensional data and feature points, which can be used in measuring devices, instruments, optical devices, etc., and can solve problems such as troublesome operation.

Active Publication Date: 2016-06-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this method performs coordinate transformation many times, there are cumulative errors, and the position of the 3D optical probe needs to be moved many times, which makes the operation more troublesome

Method used

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  • Method for three-dimensional data registration based on flexible feature points
  • Method for three-dimensional data registration based on flexible feature points
  • Method for three-dimensional data registration based on flexible feature points

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Experimental program
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Effect test

Embodiment 1

[0056] Embodiment 1, as attached figure 1 As shown, build a stepped measurement system. The local measurement system II consists of two cameras (VC-12MC-M / C65, focal length 28mm, resolution 3072*4096) and a projector 3 (EPSON, 3000lm), and the global control system I consists of two high-precision large Field industrial camera (VC-29MC-M / C, focal length 50mm, resolution 4384*6576). The object 4 to be tested is a large composite wall panel. First establish the global coordinate system and the local coordinate system. The camera coordinate system of the left industrial camera 1 in the global control system is used as the global coordinate system, and the camera coordinate system of the left camera 8 in the local measurement system is used as the local coordinate system. Keep the position of the global control system I unchanged, and carry out double-target positioning on the global control system I and the local measurement system II; turn on the projector 3, and project the ...

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Abstract

The invention belongs to the technical field of computer vision measurement and relates to a method for three-dimensional data registration based on flexible feature points. According to the method, a ladder type measurement system is adopted for three-dimensional data measurement of a large part having a free-form surface; by utilization of control point information in public view field areas of a global control system and a local measurement system, control points are matched, and a transfer matrix is obtained; by utilization of the transfer matrix, three-dimensional point cloud data measured by the local measurement system is unified into the global control system, finally three-dimensional reconstruction is performed on data of the global control system, to achieve three-dimensional data registration of the large part. According to the method, by utilization of the projection flexible control points, the problems of complex control point layout and measurement blind areas in the process of measuring a conventional large part are solved, the measurement positioning is adjusted in real time according to surface features of the measured part, and site adaptability of the measurement system and data registration precision and measurement stability are improved.

Description

technical field [0001] The invention belongs to the technical field of computer vision measurement and relates to a three-dimensional data splicing method based on flexible feature points Background technique [0002] In aerospace and other fields, in order to ensure the processing accuracy of parts and the assembly accuracy of parts, it is necessary to accurately measure the three-dimensional geometric dimensions of parts and other data. At present, the method of machine vision measurement has been widely used in industrial sites due to its advantages of high measurement accuracy, fast speed, non-contact and easy operation. However, for some special situations, such as the size of the measured part is too large, the part has a blind spot, etc., the measurement data of a single field of view cannot meet the high-precision global measurement requirements of the part. Therefore, according to the size of the large part to be measured, it is necessary to use the visual sensor t...

Claims

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Application Information

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IPC IPC(8): G01B11/25G01B11/245
CPCG01B11/245G01B11/25
Inventor 刘巍兰志广张洋李晓东高鹏杨帆贾振元高航
Owner DALIAN UNIV OF TECH
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