基于透视成像的发射CT多方向相机标定技术研究
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
参考文献.39
1 引言
1.1 研究背景及意义能源是人类生息繁衍的基础，是人类社会的发展和进步的动力来源。随着航空、航天以及能源工程的飞速发展，研究、控制燃烧过程成为研究的热点内容之一。燃烧系统的设计决定燃烧效率，燃烧效率又直接影响废物排放、能源成本等一系列问题。由此在实际生活和生产中，需要对燃烧流场的传热性、燃烧过程中发生的物理和化学反应进程等进行更细致的研究， 才能对燃烧系统的设计有更深刻更系统的把握。所以可以得出结论，燃烧过程中各参量的诊断对我们透彻了解燃烧过程和设计燃烧系统有重要的意义。燃烧是一个包含了物理、化学、力学反应等多种变化的复杂的过程，比如激烈的发光发热、火焰辐射等[1]。基于光学的燃烧诊断技术随着光谱技术的发展显得越来越重要。