基于立体标定件的双目视觉目标测量方法

Binocular Vision Target Measurement Method Based on Stereo Calibration

为了实现双目摄像机对目标物测量精度的提升,本文提出一种基于立体标定件的双目立体视觉目标物测量方法。在摄像机标定步骤中,本方法在传统标定方法基础上,利用立体标定件的几何特性以及相邻面的图像冗余对初步标定的内外参矩阵进行修正,提升标定数据的精确性,然后利用SGBM(Semi-Global Block Matching)立体匹配算法对校正后的左右图像进行匹配,获取测量物上各点的三维坐标值,从而实现对目标物的尺寸测量。分别用不同的物体进行测量后,实验结果证明本方法能将误差控制在1 mm以内,具有较好的准确性。

In order to improve the measurement accuracy of the target by the binocular camera,a binocular stereo vision target measurement method based on stereo calibration parts is proposed in this paper.In the camera calibration step,based on the traditional calibration method,this method uses the geometric characteristics of the three-dimensional calibration part and the image redundancy of adjacent surfaces to modify the initial calibration internal and external parameter matrix to improve the accuracy of the calibration data.The Semi-Global Block Matching algorithm matches the corrected left and right images to obtain the three-dimensional coordinate values of the points on the measurement object,thereby achieving the measurement of the size of the target object.After measuring with different objects,the experimental results prove that the method can control the error within 1mm,and has better accuracy.