A distance measurement method using the principle of binocular visual parallax distance measurement
A technology of distance measurement and binocular vision, applied in the direction of measurement devices, optical devices, instruments, etc., can solve the problems of increasing matching difficulty and increasing image differences, and achieve the effect of simple process and strong operability
Inactive Publication Date: 2016-01-06
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Increasing the baseline length improves measurement accuracy, but at the same time increases the difference between images. The increase in the difference between images means that the matching is more difficult. Therefore, the system design needs to comprehensively consider various factors.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
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 depths 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 points to be measured is obtained according to the number of pixels on the captured image. The distance from the measuring point to the optical center, the angle between the two points to be measured and the line connecting the optical center, and the distance between the two points to be measured.
[0039] Such as figure 2 Shown, the schemati...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(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