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Fast three-dimensional reconstruction method in vision measurement

A technology of 3D reconstruction and visual measurement, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as immature stereo vision technology, achieve the effects of avoiding feature point aggregation, improving detection speed, and less time-consuming

Inactive Publication Date: 2014-09-10
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0005] Although stereoscopic vision has been developed for more than 20 years, the existing stereoscopic vision technology is still in the immature stage no matter from the perspective of visual physiology or practical application.

Method used

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  • Fast three-dimensional reconstruction method in vision measurement
  • Fast three-dimensional reconstruction method in vision measurement

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the described embodiments are only intended to facilitate the understanding of the present invention, and do not limit it in any way.

[0030] Such as figure 1 As shown, the fast three-dimensional reconstruction method provided by the embodiment of the present invention includes:

[0031] (1) Image acquisition

[0032] The left and right cameras collect the target image synchronously, and respectively obtain the left image I l (x,y), right image I r (x,y).

[0033] (2) Image preprocessing

[0034] For the collected image I l (x,y) and I r (x, y) perform median filtering and Wiener filtering respectively to obtain a smooth target image pair I cl (x',y') and I cr (x',y').

[0035] (3) Camera calibration

[0036] Using Zhang Dingyou’s calibration method, the camera is calibrated using the image pairs collected by the left and right camer...

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Abstract

The invention provides a fast three-dimensional reconstruction method in vision measurement. According to the method, firstly, internal parameters and external parameters of a camera are calibrated; then, three-dimensional image pairs are collected, and in addition, the images pairs are subjected to pair polar line rectification according to camera calibration results; next, feature point detection and description is carried out; then, feature point matching is carried out; after the feature point matching is completed, a three-dimensional coordinate of a feature point in a world coordinate system is calculated by utilizing the matching results; finally, a left image is subjected to triangulation through Delaunay triangulation to obtain a vertex code; and finally, triangles are pasted onto the calculated three-dimensional coordinate one by one by OpenGL.

Description

technical field [0001] The invention belongs to the technical field of binocular stereo vision, and in particular relates to a fast three-dimensional reconstruction technology based on feature point matching in visual measurement. Background technique [0002] 3D reconstruction has been one of the important research fields of computer vision. In recent years, the research on 3D reconstruction technology has made great progress, and new technologies and methods are constantly emerging. Commonly used 3D reconstruction methods mainly include motion image sequence method, photometric stereology method, texture recovery shape method and stereo vision method. The theoretical basis of various 3D reconstruction methods is different, and there are certain differences in accuracy, size and system price, so the applicable application fields are also different. Existing 3D acquisition systems usually use specific hardware devices, such as X-rays, laser rangefinders, etc., and the syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T7/00
Inventor 黄攀峰蔡佳张彬台健生龚思怡
Owner NORTHWESTERN POLYTECHNICAL UNIV
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