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针对双目立体视觉测距中产生误差的问题,分析了系统中的各个参量,并建立了双目立体视觉测距系统的误差模型。得出引起测量系统误差最大的两个参量是CCD摄像头的对准程度和测量的距离;在视场中心的距离测量精度低,边缘测量精度高,在视场中心的水平和纵向的测量精度却远高于在边缘的测量精度两个结论。基于本文建立的误差模型可以指导适用于具体应用场合的双目立体视觉测距系统的设计。
Aiming at the problem of binocular stereo vision ranging error, the various parameters in the system are analyzed, and the error model of binocular stereo vision ranging system is established. It is concluded that the two parameters that cause the largest error in the measurement system are the alignment degree of the CCD camera and the distance to be measured; the accuracy of the distance measurement in the center of the field of view is low, the edge measurement accuracy is high; the horizontal and vertical measurement accuracy in the center of the field of view Much higher than the two measurements at the edge of the accuracy. The error model established in this paper can guide the design of binocular stereo vision ranging system suitable for specific applications.