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Development of three-dimensional measuring system for particle movement and the application for environmental inspection.

颗粒运动三维测量系统开发及其在环境检测中的应用。

基本信息

批准号：
11792013
负责人：
KAWASUE Kikuhito
金额：
$ 3.9万
依托单位：
Miyazaki University (2000-2001)Sasebo National College of Technology (1999)
依托单位国家：
日本
项目类别：
Grant-in-Aid for University and Society Collaboration
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11792013/
关键词：
Image processing TV camera three-dimensional Measurement particle organism Inspection

项目摘要

A new technique to measure the instantaneous three-dimensional movement of particle is developed. By introducing a refractor on the TV camera lens, the image of tracer particle is displaced corresponding to the distance between the TV camera and tracer particle. Upon rotating the refractor at high speed during the TV camera exposure, spiral streaks of moving particles appear on an image since the circular shift is added to the movement of tracer particles. Each spiral streak contains three-dimensional information of the moving particle since the size of the streak is inversely proportional to the distance of the particle from the camera. The location and size of the spiral streak in the image are related to the three-dimensional location of the particle, and the pitch and size variation of the streak are related to the three-dimensional velocity of the tracer particle.In the case that many particles are existed in a frame, some annular streaks of measuring points overlap each other. In order to extract each annular streak from overlapped streaks, lines in the direction of edge normal are generated. Normal lines at the segment of an annular streak accumulate in the 2-dimensional parameter space. Since the annular streak has concentric segment, their normal lines converge at the center of the annular streak. The center of the each annular streak can be extracted by finding the peak generated in the parameter space. This procedure enables fast and efficient analysis of annular streaks. This technique is applied also for the analysis of spiral streaks.Since small organisms are easy to be influenced by the circumstances, the quantitative inspection can be executed by measuring the movement of small organism. In this study, the measuring system for the movement of small organism is developed using the image processing.

提出了一种测量粒子瞬时三维运动的新方法。通过在电视摄像机镜头上引入折射器，使示踪粒子的图像根据电视摄像机与示踪粒子之间的距离发生位移。在电视摄像机曝光期间高速旋转折射镜，由于示踪粒子的运动增加了圆位移，因此在图像上出现了运动粒子的螺旋条纹。每个螺旋条纹包含移动粒子的三维信息，因为条纹的大小与粒子到相机的距离成反比。图像中螺旋条纹的位置和大小与粒子的三维位置有关，条纹的间距和大小变化与示踪粒子的三维速度有关。在一个框架中存在多个粒子的情况下，测点的一些环形条纹相互重叠。为了从重叠的条纹中提取每个环形条纹，在边缘法线方向上生成线条。环形条纹段的法线在二维参数空间中积累。由于环形条纹具有同心线段，它们的法线在环形条纹的中心会聚。每个环形条纹的中心可以通过在参数空间中寻找产生的峰值来提取。该程序能够快速有效地分析环形条纹。该方法也适用于螺旋条纹的分析。由于小生物容易受到环境的影响，因此可以通过测量小生物的运动来进行定量检测。在本研究中，利用图像处理技术开发了小型生物运动测量系统。