Abstract
This paper studies the limitations of binocular vision technology in monitoring accuracy. The factors affecting the surface displacement monitoring of the slope are analyzed mainly from system structure parameters and environment parameters. Based on the error analysis theory, the functional relationship between the structure parameters and the monitoring error is studied. The error distribution curve is obtained through laboratory testing and sensitivity analysis, and parameter selection criteria are proposed. Corresponding image optimization methods are designed according to the error distribution curve of the environment parameters, and a large number of tests proved that the methods effectively improved the measurement accuracy of slope deformation monitoring. Finally, the reliability and accuracy of the proposed system and method are verified by displacement measurement of a slope on site.
Highlights
Landslides are among the most common and catastrophic natural hazards, causing numerous casualties and fatalities every year [1]
The accuracy of binocular vision technology is limited by the camera calibration parameters [15], system structure parameters [16], and environment parameters [17,18]
The main purpose of this study aims to investigate structure parameters and environment parameters for improving the accuracy of the binocular vision measurement system for slope deformation monitoring
Summary
Landslides are among the most common and catastrophic natural hazards, causing numerous casualties and fatalities every year [1]. The accuracy of binocular vision technology is limited by the camera calibration parameters [15], system structure parameters [16], and environment parameters [17,18]. Deng et al [26] have studied the effect of vision measurement parameters on the accuracy of binocular reconstruction at high temperatures. The influence of environment parameters only can be optimized by image processing technologies based on monitoring data. There is very little research into the above parameters of the binocular vision technology for slope deformation monitoring. The main purpose of this study aims to investigate structure parameters and environment parameters for improving the accuracy of the binocular vision measurement system for slope deformation monitoring. Field tests were conducted to verify the reliability and accuracy of the proposed system and method
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