Dissertation > Excellent graduate degree dissertation topics show

The 3D-Reconstruction of the Man’s Skull Based on Serial Stereo Images of Structured Light

Author: KeTao
Tutor: ZhangJianQing
School: Wuhan University
Course: Photogrammetry and Remote Sensing
Keywords: Vanishing point Structured light Three-dimensional reconstruction Relative orientation of the direct solution Match Delaunay triangulation Texture Mapping
CLC: R318
Type: Master's thesis
Year: 2005
Downloads: 169
Quote: 2
Read: Download Dissertation

Abstract

3D medical image reconstruction visualization in scientific computing is an important research and application areas, three-dimensional surface reconstruction from medical images can be reconstructed three-dimensional model to faithfully reproduce the surface profile of the tissue or organ. In medical diagnosis, in order to determine the details of the diseased body, the doctor urgent need for effective tools to complete the three-dimensional reconstruction of the various organs of the body and display. Most of the medical image reconstruction is based on the three-dimensional reconstruction of the medical X-ray image of the three-dimensional information of the target sequence by a two-dimensional X-ray images, the use of computer vision theory and method. In this paper, based photogrammetry theory, the theory of the use of digital photogrammetry and structured light 3D image sequences on human skull three-dimensional reconstruction. The full text of seven chapters, elaborated on the whole process of the human skull reconstruction based on structured light three-dimensional image sequence. The main contents are as follows: (1) camera calibration using the single like Vanishing Point, the experimental use of non-metric digital camera calibration. (2) lack of texture feature points corresponding human skull surface texture information is not ideal, it is difficult to use a three-dimensional image matching method to match the feature points, and thus can not automatically obtain three-dimensional images on the point of the same name. In order to solve the problem of feature points corresponding point of structured light as a secondary light source, using linear laser and nuclear line automatic geometric constraints corresponding to the three-dimensional image of the same name, a good solution to the problem of texture to the lack of the same name as the target point corresponding. The method is simple, less demanding on hardware, can be widely applied to the light conditions are not ideal environment for the lack of goals and texture three-dimensional reconstruction. (3) the relative orientation solutions stereo pair of relative orientation due to the close-range photogrammetry Unlike traditional aerial photogrammetry, stereo pair at the intersection angle and can not know the tilt angle approximation of the image, making it difficult to use traditional iteration method relative orientation. In this paper, the relative orientation of the direct solution of the relative orientation of the stereo pair, a good solution without knowing the relative orientation angle approximation three-dimensional image. (4) The model block structure network connection due to the three-dimensional image sequences declination independent model model connection is difficult to ensure that a wide range of field of view three-dimensional images have the same name as the object side point. Block model connection must therefore be made to ensure a number of the same name as the object side, each sub-block model. Construction of triangulation, space projection to the two-dimensional plane structure network, which must ensure that the space point projected onto the plane do not overlap each other, and thus need to skull model block structure network. By the sub-block method not only simplifies the process of the network configuration, while also reducing the the traditional continuous relative orientation model connection error, and improve the accuracy of the model is connected. (5) based on the constraints Delaunay triangulation construction building skull model triangulated irregular network (TIN), the characteristic line and the boundary line as a Delaunay Triangulation side constraints, constraints, better able to the expression of the surface model of the skull. (6) texture mapping using the original image as a texture image of the model, the real texture on the surface of the skull model is mapped using OpenGL technology, enhance the three-dimensional sense and realism of the skull model.

Related Dissertations

CLC: > Medicine, health > Basic Medical > Medical science in general > Biomedical Engineering
© 2012 www.DissertationTopic.Net Mobile