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Development of a Digital Photogrammetric System for Precise Deformation Measurement

精密变形测量数字摄影测量系统的开发

基本信息

批准号：
13650592
负责人：
HATTORI Susumu
金额：
$ 2.05万
依托单位：
Fukuyama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

The object of the project (2001-2003) is to develop a close-range digital photogrammetric system for precise deformation monitoring of tunnets and slopes, and measurement of large structures like bridge blocks. The followings are major research subjects and results.1.To attain practical measurement precision by vision metrology with a low resolution digital camera, design of retro-targets, photographing techniques and high speed measurement of image coordinates are considered and eventually 3-D precision of 400micro-meters for 10 m is stably obtained.2.To process a large volume of images (e.g. 30 sheets or more) to measure object coordinates of many (e.g. 100 or more) target points within an hour, image processing techniques including automatic labeling of target images, and a calculation technique for high speed adjustment are developed.3.To obtain practical precision, sensitivity and reliability of measurement, network design problems are considered. The. zero-order design (optimization of the reference system) is completely resolved. The first-order design (optimization of camera configuration) and the second-order design (optimization of observation weighting) cannot be separated in vision metrology. The better part of them is treated experimentally and partially theoretically.4.Through many experiments the measurement methods and factors in practical use are tested and improved. They are tunnel profile measurement in excavation, industrial inspection of a bridge block, stress-strain test of a concrete beam and deformation detection for a slope.5.To monitor deformations of long distant slopes or rocks, the properties of ortho-projection instead of conventional central projection. are studied. The orientation method of images taken with a fictitious. camera with an infinitely long focal length and the camera calibration methods are developed and it is shown that the similar space can be reconstructed from three images.

该项目（2001-2003年）的目标是开发一种近距离数字摄影测量系统，用于隧道和斜坡的精确变形监测以及桥块等大型结构的测量。主要研究内容和成果如下：1.为使低分辨率数码相机视觉测量达到实用的测量精度，设计了回射靶，考虑了摄影技术和图像坐标的高速测量，最终稳定获得10 m 400微米的三维精度。2.处理大量图像（例如30张或更多张）来在一小时内测量许多（例如100个或更多个）目标点的目标坐标，开发了包括目标图像的自动标记的图像处理技术和用于高速调整的计算技术。3.为了获得实际测量精度、灵敏度和可靠性，考虑了网络设计问题。的.零阶设计（参考系统的优化）完全解决。在视觉计量中，一阶设计（摄像机配置的优化）和二阶设计（观测加权的优化）是不可分离的。通过大量的实验，对实际应用中的测量方法和影响因素进行了检验和改进。研究了正射投影法代替传统的中心投影法监测长距离边坡或岩体变形的特点。进行了研究虚拟拍摄图像的定位方法。提出了一种无限长焦距的摄像机模型和摄像机标定方法，并证明了由三幅图像可以重建相似空间。