A high-precision binocular vision measurement method based on depth of field compensation
A technology of binocular vision and measurement method, which is applied in the directions of measuring devices, image analysis, image enhancement, etc., and can solve the problem of low measurement accuracy in the depth of field direction
Active Publication Date: 2019-01-01
DALIAN UNIV OF TECH
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[0004] The technical problem to be solved in the present invention is to solve the problem of low measurement accuracy in the direction of depth of field in the process of measuring large-scale aviation parts, and to invent a high-precision binocular vision measurement method based on depth of field compensation
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[0043] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.
[0044] figure 1 A schematic diagram of the measurement system, figure 2 A schematic diagram of the measurement principle. As shown in the figure, in the embodiment, a high-resolution binocular camera is configured to collect two-dimensional plane target information, and the movement of the two-dimensional plane target is controlled by an electronically controlled rotation and translation platform to perform leveling and calibration of the binocular camera. The camera model in the binocular vision system is vieworks VC-12MC-M / C 65 camera, resolution: 4096×3072, image sensor: CMOS, frame rate: full frame, maximum 64.3fps, weight: 420g. The lens model is EF16-35mmf / 2.8LIIUSM, the parameters are as follows, lens focal length: f=16-35, APS focal length: 25.5-52.5, aperture: F2.8, lens size: 82×106. The shooting condi...
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The invention proposes a binocular visual sense highly-precise measurement method based on depth-of-field compensation, which belongs to the computer visual sense measurement technology field and relates to a binocular visual sense highly-precise measurement method based on depth-of-field compensation. The method comprises: first, calibrating the initial positions of two cameras; leveling the two-dimensional target mark and the left camera plane and the right camera plane; solving the distortion coefficient of the position and solving the structure parameters between the left camera and the right camera; then, horizontally moving the planar target mark in the left camera direction and the right camera direction for parameter calibration; creating a distortion compensation module for the radial direction in the depth-of-field direction; and performing measurement precision compensation to the measurement results of different depth information so as to realize the high precision measurement of the binocular camera in the depth-of-field direction. According to the method of the invention, through the establishment of a distortion module with depth-of-field direction and in combination with the calibration information of the binocular camera, it is possible to carry out distortion compensation with depth-of-field information at the tested points within the space range to realize the measurement of large dimension parts with the depth-of-field direction, therefore, increasing the three-dimension measurement precision of binocular visual sense.
Description
technical field [0001] The invention belongs to the technical field of computer vision measurement and relates to a binocular vision high-precision measurement method based on depth of field compensation. Background technique [0002] The measurement of the three-dimensional profile of aerospace parts is very important for the manufacture of parts and the detection of aerodynamic shape, and it is an important means to ensure the quality of parts manufacturing. The industrial stereo vision system has the advantages of non-contact, fast measurement speed, high measurement accuracy, and in-situ measurement. It has been widely used in the assembly measurement process of aerospace parts. However, due to the large geometric dimensions of core parts such as empennage and fuselage panels, and the curved surface parts also have large size changes in the depth of field direction. The traditional binocular vision system has high precision in the direction parallel to the image plane, ...
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IPC IPC(8): G01B11/25G06T7/80
CPCG01B11/2504G06T7/85G06T2207/10004G06T2207/30208
Inventor 刘巍张洋兰志广张致远贾振元
Owner DALIAN UNIV OF TECH