双目视觉测量系统中摄像机分辨率引起的误差分析

Error Analysis Caused by the Camera Resolution in Binocular Vision Measurement System

文中通过对双目视觉系统的研究,建立了双目视觉系统中摄像机分辨率的误差模型,并分析了分辨率对测量结果的影响。从理论上分析了在测量深度Z方向上的测量误差,发现分辨率误差在Z方向上影响最大,并且目标距离摄像机越远,误差越大,误差与目标深度之间成非线性关系。另外,误差模型还与摄像机的基线距离、有效焦距、像点在感光元件的坐标位置有关。

Based on the research of the binocular vision system, this paper establishes the camera resolution error model,and analyzes the resolution on the result of measurement. The measurement error in measuring the depth of the Zdirection is analyzed. Analysis proves that resolution error has the greatest influence on the Z direction, and the fartherthe distance from the camera target is, the bigger the error is. It is a nonlinear relationship between error and the depth ofthe target. Error model also relates to the camera baseline distance, effective focal length and the coordinates of imagepoint in the sensor location.