Dissertation > Excellent graduate degree dissertation topics show

Examination and Realization on Three-dimensional Reconstruction Algorithm of Supercavitation

Author: ChenYu
Tutor: LeiBin
School: Xi'an University of Technology
Course: Communication and Information System
Keywords: supercavitation three-dimensional reconstruction SFS grayscale image parameter estimation MATLAB
CLC: TP391.41
Type: Master's thesis
Year: 2012
Downloads: 48
Quote: 0
Read: Download Dissertation

Abstract


In recent years, three-dimensional reconstruction has become a hot research field of computer vision for its wide range of applications. Along with the deep-going study of theoretical knowledge and improvements of technique, it effectively promotes the development of technology in the field of optical imaging, digital image processing, and software programming and designing. In this paper, it estimates the study on the reconstruction algorithm and the key parameters in this algorithm by the two-dimensional grayscale image of supercavitation under water with the background of a project for a research institution.At the beginning of this thesis, the background information, significance and basic principles of three-dimensional reconstruction are introduced, including the research status at home and abroad at present. It selects the method of shape from shading(SFS) to do the three-dimensional reconstruction of the supercavitation’s image because of the special nature of this topic. After analyzing and comparing the pros and cons of the common illumination models and commonly used SFS algorithms of reconstruction, it confirms the scheme of three-dimensional reconstruction and flow path of algorithm for the grayscale image of supercavitation. Then it analyzes the influence on the result of reconstruction when selecting the position of light source and the value of slant and tilt of point on the surface of object in optical imaging. On this basis, a mathematical solution for supercavitation on SFS algorithm is deduced and the methods of the pre-processing are discussed for the grayscale image of supercavitation and the model of natural supercavitation which support the analysis of precision for the results of reconstruction. At last, it completes the SFS algorithm for three-dimensional reconstruction on the grayscale gradient image of supercavitation in the environment of MATLAB. In order to verify the accuracy of algorithm, firstly it selects a grayscale image of the hemisphere under ideal lighting conditions to do three-dimensional reconstruction, and the result is ideal. Subsequently, in the content of research, it builds a test environment under laboratory conditions, takes photos of supercavitation which is simulated by manual work under water to do the three-dimensional reconstruction and analysis of results, and points out the aspects that need to be improved in the follow-up work of this project. At the same time, the software system in the environment of MATLAB completes a solver and storage for the three-dimensional parametric of grayscale image, which provides related data for the dynamic visual simulation of supercavitation in future.

Related Dissertations

  1. Design of Reciprocatingwire Outfit of Mwedmand Research on It’s Control System,TG484
  2. Research on Predictive Control and Simulation of pH Value Based on the Confection Process of Sodium Nitrate,TP273
  3. Three-Dimensional Numerical Modelling for the Head and the Electric Field Analysis of DBS,R742.5
  4. S-lay Installation Analysis for Deepwater Pipeline,TE973
  5. Research and Application of Safety Assessment Method Based on Neural Network,X937
  6. The Three-dimensional Structure Research of Facial Modiolus,R782.2
  7. Three-dimensional reconstruction and cochlear basement modal Numerical Simulation,R764
  8. Mining resources based on genetic algorithm optimization model of,O224
  9. Three Dimensional Surface Reconstruction Based on Image Sequence,TP391.41
  10. Experimental Investigation on the Fluid Dynamic Processes of Water Exit and Water Entry of a Fast Slender Body,U661.1
  11. Design of Medical Image Three-Dimensional Visualization System Based on Windows,TP391.41
  12. Slope Finite Element Generalized Reliability Algorithms,TD824.7
  13. Dynamic Characteristic Simulation and Study of Sliding Coal Plow,TD421.62
  14. The Study of Bronchial Anatomy of Right Lung with 16-slice Spiral CT,R734.2
  15. The Study on the Vestibular 3d Reconstruction of Guinea Pig and the Numerical Simulation of Temperature Field,R764
  16. DC system based on wavelet transform line detection remaining battery capacity,TM732
  17. The Research on Diode-Clamped Three-Level Inverter,TM464
  18. A Multimedia Courseware Study Based on Matlab Simulation,TP317.4
  19. Multi-view 3D Reconstruction and Application Based on Depth Fusion and Surface Evolution,TP391.41
  20. Research and Implementation of the 3D Reconstruction Based on Surface Structured Light Method,TP391.41
  21. Research on the Computer-Aided Surgery Planning for Lacrimal Passage,TP391.7

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
© 2012 www.DissertationTopic.Net  Mobile