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Simultaneous measurement of multi points using circular dynamic stereoscopy

使用圆形动态立体观测进行多点同时测量

基本信息

批准号：
16300060
负责人：
KAWASUE Kikuhito
金额：
$ 8.75万
依托单位：
University of Miyazaki
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

The use of three-dimensional information obtained by a computer vision system is attractive in various fields, and the automatic inference of three-dimensional information has been and continues to be one of the primary goals of the computer vision system. A number of methods have been developed in order to obtain three-dimensional information. Stereovision with two or more CCD cameras is used in many cases. In the stereovision method, the depth of measurement points is measured by measuring the disparity of matching pairs between frames viewed from different angles. One problem related to stereovision is that finding matching pairs between frames causes problematic computer processing because there are several possibilities for the choice of matching points.To address these problems, we have developed a circular dynamic stereoscopy(CDS) system that uses a single CCD camera. The proposed CDS system applies a monocular motion stereo system for moving measurement points in a very compact physical design. By setting beam splitter and coupled mirrors at a certain angle to the optical axis of the CCD camera lens, the image of a measurement point recorded on the image plane is displaced by an amount related to the distance between the camera and the measurement point When the coupled mirrors are rotated physically at high speed during the exposure of the camera, while maintaining the angle with respect to the optical axis fixed, the image of a measurement point traces an annular streak Since the radius of the annular streak is inversely proportional to the distance between the camera and the measurement point, the 3D position of the measurement point can be obtained by analyzing the streak This system has been applied to the robot vision and the measurement of water flow by measuring the particle positions in the water tank

利用计算机视觉系统获得的三维信息在各个领域都很有吸引力，而三维信息的自动推理一直是计算机视觉系统的主要目标之一。为了获得三维信息，已经开发了许多方法。在许多情况下，使用两个或更多个ccd摄像机的立体视觉。在立体视觉方法中，通过测量从不同角度观看的帧之间的匹配对的视差来测量测量点的深度。与立体视觉相关的一个问题是，寻找帧之间的匹配对会导致计算机处理问题，因为匹配点的选择有多种可能性。为了解决这些问题，我们开发了一种使用单个CCD摄像机的圆形动态立体视觉(CDS)系统。提出的CDS系统采用单目运动立体系统，以非常紧凑的物理设计移动测量点。通过将分光镜和耦合镜设置成与CCD相机镜头的光轴成一定角度，当相机在曝光期间物理地高速旋转时，记录在图像平面上的测量点的图像偏移与相机与测量点之间的距离相关的量，同时保持相对于光轴的角度固定，由于环形条纹的半径与相机与测量点之间的距离成反比，所以测量点的图像跟踪环形条纹，通过对条纹的分析可以得到测量点的三维位置，该系统已应用于机器人视觉和通过测量水箱中颗粒的位置来测量水流