改善传统体视技术三维测量精度的一种新方法

针对被动式体视技术精度受限的缺点,研究了改善被动式技术三维测量精度的方法。其主要手段是:(1)使用参数曲线精确地逼近(亚象素精度)混有噪声的线段,从而减小测量噪声的影响;(2)利用广义圆锥直接求出连续域空间物体坐标值,基本克服了取样点不够细而引入的量化误差限制。文中算法无需知道两幅图中精确的点对应关系,因而即使是分辨率较低的输入设备,也可达到较高的三维测量精度。

A New Approach to Improving the Accuracy of 3D Measurement in Stereo Vision Technique

A new approach to acquiring three dimensional (3D) data of an object via binocular vision technique is presented in this paper. It attempts to improve the accuracy of 3D measurement of a passive vision system. The key points of this approach are: (1) making accurate (subpixel) location of the noisy image edge segments by parameterization; (2) using generalized cones to directly determine the body coordinate values in contineous space domain so as to allviate the quantization error incurred by insufficient number of samples.It is not reguired for the proposed algorithm to know the precise point.correspondance relationship between two pictures so that high 3D measurement accuracy can be achieved even for low resolution input devices.