Method for measuring and calculating binocular vision displacement measurement errors and measuring system

Abstract

The invention provides a method for measuring and calculating binocular vision displacement measurement errors and a measuring system based on a standard measuring tool (a screw micrometer or a vernier caliper). The method comprises the following steps of: arranging a marker on a meter head of the standard measuring tool; parallelly arranging the standard measuring tool in three coordinate axis directions in a three-dimensional coordinate system of a stereo space respectively, regulating the standard measuring tool to move the marker together with the meter heads in the three coordinate axis directions respectively and acquiring actual values of displacement of the marker; and calculating an arithmetic mean value of absolute values of the difference between the actual values and measured values of the displacement to acquire the displacement measurement errors in the three coordinate axis directions respectively, and calculating the displacement measurement errors in the three coordinate axis directions to acquire errors in an entire measurement range. The system comprises the standard measuring tool (the screw micrometer or the vernier caliper) and a binocular vision measurement device.

Description

technical field [0001] The present invention relates to a measurement method and a measurement system for binocular vision displacement measurement error, and more specifically, to a method and device for measuring and calculating binocular vision displacement measurement error in a specific measurement environment. Background technique [0002] Binocular vision technology is an important technology in the field of computer vision. Binocular vision technology can reconstruct the coordinates of a point in space through the internal and external parameters of two cameras and the coordinates of corresponding points on the imaging plane of the two cameras. like figure 1 As shown, I 1 and I 2 are the imaging planes of the left and right cameras, C 1 and C 2 are the optical centers of the left and right cameras respectively, there is a point M on a certain plane π in space, and the point M is at I 1 and I 2 The projected points on are respectively P 1 and P 2 (i.e., optica...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned binocular vision measurement error is not a binocular vision displacement measurement error. The two errors are not exactly the same. Moreover, the calculation method of the mathematical model error often does not consider the specific measurement environment, and the binocular vision measurement method is very sensitive to ambient light. , the measurement results under different ambient light effects are very different, so the mathematical model method cannot calculate the error in the specific measurement environment

In addition, the mathematical model error calculation method can reflect the change trend of measurement error and can be used as a basis for guiding the selection of measurement parameters, but it cannot accurately calculate the error value

Therefore, so far, there is no method and corresponding measurement system for measuring the binocular vision displacement measurement error in the field environment.

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