基于透视成像的发射CT多方向相机标定技术研究
时间:2019-12-08 15:18 来源:毕业论文 作者:毕业论文 点击:次
| 摘要燃烧诊断是揭示燃烧机理，深入研究燃烧过程的关键技术之一。发射层析技术用于燃烧场的全场显示与关键参数的三维测量，具有非接触、无损等优点，成为研究复杂燃烧场的重要方法之一。本文针对ECT 重建前的多相机标定问题展开研究，主要包括以下几个方面的研究：1.针对ECT 重建实验中的需要，设计编写了基于MFC 平台的多相机同步采集程序，实现了沿多个方向图像的采集和高速存储；2.根据透视投影的相机标定模型，进行了多方向相机标定的实验。设计并实现了成像点灰度中心的确定，提出了基于线性方程的矩阵参数求解方法。结合得到的相机参数与透视成像模型，实现了多方向投影图的重映射。3.在上述工作的基础上，以丙烷燃烧场为重建对象，利用得到的相机参数，进行三维燃烧场的重建。42533 毕业论文关键词 燃烧诊断 三维重建 图像采集 相机标定 Title Multi-Directional Camera Calibration for Emission CTBased on Perspective Imaging Technology Abstract Combustion diagnose is one of the key technologies to the study of thecombustion process and its benefits is to reveal the combustionmechanism.ECT is used in combustion field and display the key parametersof 3D measurement. ECT has become one of the most important methods forcomplicated combustion diagnose because of the advantages of non-contactand nondestructive.This paper study the multiple camera calibrationbefore ECT reconstruction,mainly including the following several aspects:1.According to the need of ECT reconstruction experiment, a multiplecamera synchronization acquisition program based on MFC platform isdesigned, which can realizes the image acquisition and high speed storagein multiple directions;2. According to the model of perspective projection of the cameracalibration, the multi-directional camera calibration experiment isdesigned and implemented.A method based on linear equations is designedwhich can determine the gray center of the imaging point.3. On the basis of the above work, the propane combustion field is usedas the reconstruction object, and the 3D combustion field is reconstructedby using the camera parameters. Keywords Combustion diagnosis Three dimensional reconstruction Imageacquisition Camera calibration 目次 1引言..6 1.1研究背景及意义..6 1.1.1拉曼光谱技术...6 1.1.2激光诱导荧光法....6 1.2发射CT技术概述..6 1.3相机标定技术....8 1.4本文的主要内容9 2多相机同步采集....11 2.1多相机同步采集程序设计....11 2.2多相机同步采集实验...13 2.2本章小结..19 3相机标定.20 3.1标定原理.20 3.1.1相机成像模型.20 3.1.2标定过程26 3.2标定实验.28 3.3重投影实验..31 3.4本章小结.32 4发射层析的重建..28 4.1实验装置.33 4.2ECT重建...33 结论..37 致谢..38
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