Distance measuring method applying binocular visual parallax error distance-measuring principle

A technology of distance measurement and binocular vision, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of increasing image differences and increasing difficulty of matching, and achieves the effect of simple process and strong operability

Inactive Publication Date: 2013-09-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Increasing the baseline length can improve the measurement accuracy, but at the same time it also increases the difference between the images. The increase of the difference between the images means that the matching is more difficult, so the system design needs to comprehensively consider various factors

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Embodiment Construction

[0037] Next, the specific embodiments of the present invention will be further described in conjunction with the accompanying drawings:

[0038] Such as figure 1 Shown, a kind of distance measuring method of the present invention applies binocular visual parallax ranging principle, the flow chart of the measuring method of the distance between any two visible points to be measured on two photos taken by the binocular camera is as follows figure 1 shown. The basic idea is to obtain the depth of the two points to be measured by the look-up table method. After the depth is obtained, the actual projection length of the three-dimensional point to be measured can be obtained according to the number of pixels on the captured image, and then it can be solved sequentially according to the relationship between the corners of the triangle. The distance between the two points to be measured and the optical center, the angle between the two points to be measured and the line connecting th...

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Abstract

The invention discloses a distance measuring method applying a binocular visual parallax error distance-measuring principle. By means of adopting different base length to adapt to requirements on measurement accuracy of different distance measuring ranges, the distance measuring method is applicable to precise size measurement for short distance and small parts. On the basis of a conventional binocular measuring method, a pair of cameras which are provided with parallel optical axes and positioned side by side are adopted to make two random to-be-measured visualized points in two images into a plane vertical to the two optical axes, depth values of the two to-be-measured points are obtained via a inversely proportional relationship between binocular visual parallax error and depth, distances from the two to-be-measured points to an optic center and angles among the two to-be-measured points and an optical center connection line can be determined according to the depth value of the to-be-measured points and focal length of the cameras, and then the actual distance between the two points can be determined via the cosine law. Compared with conventional methods, the distance measuring method applying the binocular visual parallax error distance-measuring principle has the advantages of simplicity in operation, strong practicability, high precision and easiness in popularization and use.

Description

technical field [0001] The invention relates to the field of photogrammetry, in particular to a distance measurement method using the principle of binocular visual parallax distance measurement. technical background [0002] Geometric measurement mainly includes the measurement of angle, distance, displacement, straightness and spatial position, and the measurement scales develop in the direction of large size and small size respectively. The direction of small size is developing towards the level of micron and nanometer precision, and the measurement of large size mainly refers to the measurement of the spatial position, size, shape, motion trajectory, etc. of objects within the range of several meters to hundreds of meters. The most common traditional large-scale measurement is the three-dimensional coordinate measurement to determine the position. The three-dimensional coordinate measuring machine, theodolite, total station, laser range finder, indoor GPS, digital close-r...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01B11/26
Inventor 邹超洋冯颖杜娟苏春翌于燕斌
Owner SOUTH CHINA UNIV OF TECH
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