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Converse measuring method and device based on axial direction stereovision

A stereo vision and measurement device technology, applied in the field of reverse measurement and devices based on axial stereo vision, can solve problems such as the complexity of homologous feature matching algorithms, and achieve the effects of simple structure, simplified matching process, and low equipment cost

Inactive Publication Date: 2008-01-23
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

In addition, using the horizontal stereo vision method, since there is no special geometric relationship between the two image planes, the homologous feature matching algorithm is more complicated

Method used

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  • Converse measuring method and device based on axial direction stereovision
  • Converse measuring method and device based on axial direction stereovision
  • Converse measuring method and device based on axial direction stereovision

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Embodiment Construction

[0023] As shown in Fig. 1 and Fig. 2, the far-axis camera 1 and the paraxial camera 2 are placed on the top of the circular platform inner mirror 7, and the axes of the two cameras are perpendicular to each other, and a circular beam splitter 3 is arranged at the intersection of the two axes, The far-axis camera 1 is farther away from the circular beamsplitter 3 than the paraxial camera 2, and the two cameras can move on their respective axes; the large bottom of the circular table inner mirror 7 faces upwards and is supported by a bracket 8, and the top of its large bottom is equipped with Circular plane structured light generator 5, a lifting mechanism 9 at the bottom of the inner mirror 7 of the round table, the object 4 to be measured is placed on the lifting mechanism 9 and located in the inner mirror 7 of the round table, and the bracket 8 and the lifting mechanism 9 are arranged on the base 10; Frame camera and lifting mechanism 9 are all connected with computer 13 with ...

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Abstract

The invention discloses a reverse measuring method based on axial stereo view and an arrangement for the method, which essentially comprises two cameras arranged in axial direction, a circular truncated cone inner mirror, a structure light generator and other accessories. During the measuring, the object to be measured is placed on a lifter moving up and down, the structure light generator projects circular plane structure light on the object; a section light stripe is formed at the perimeter after modulation of the surface shape of the object. The two axial cameras concurrently capture the virtual image of the section light stripe in the circular truncated cone inner mirror; then based on the special restricting relationship of outer pole-line of the axial cameras, rapid matching of pixels of same source is carried out; based on the principle of axial stereo vision, the spatial coordinates of each sampling points on the virtual image of the light stripe are calculated. Finally, the shapes of each section on the object are calculated in the symmetry principle of object and image; and the geometric model of the whole object is reverse calculated by axial splitting of section data. For the method, the structure is simple, the equipment cost is low, and the measuring speed is high.

Description

technical field [0001] The invention relates to a reverse measurement method and device based on axial stereo vision. Background technique [0002] As a rapid product innovation and development method, reverse engineering is widely used in modern manufacturing. The primary task of reverse engineering modeling is to accurately, quickly and reasonably obtain point cloud data describing the product shape. [0003] At present, the most commonly used reverse measurement methods are: contact measurement method, laser scanning method and stereo vision measurement method. Contact measurement and laser scanning measurement technologies are relatively mature, and they are currently the two reverse measurement methods that account for the largest market share. However, contact measurement and laser scanning measurement are generally supported by three coordinate measuring machines or flexible arms, and the cost of equipment is very high. The stereo vision measurement method uses two ...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/03G01B11/245
Inventor 王文卢科青陈子辰
Owner ZHEJIANG UNIV
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