Multiresulution Range Image Reconstruction And Its Software Implementation

This dissertation involves a research project supported by National Natural Science Foundation of China (NSFC) (grant 60275012), Natural Science Foundation of Guangdong Province (grant 031804),Natural Science Research Grant of Higher Education of Gaungdong province (No. 04Z010) and Science & Technology Bureau of Shenzhen (grant 200341). The research focuses of the dissertation are multiresolution range image reconstruction and its software implementation, especially the temporal phase unwrapping algorithms and the software designing. The major contributions include:1. The primary principles of various phase reconstruction methods based on temporal phase unwrapping and their validities are proved theoretically. The error sources and the noise immunity are analyzed. The computational simulations and experimental results are also given to compare the various phase reconstruction algorithms.2. On the basis of such analysis, of various phase reconstruction methods, we propose a generalized phase reconstruction algorithm, generalized fringe sequence encoding. By analyzing the noises immunity ability of our algorithm and positive exponential sequence temporal phase unwrapping algorithm, and the computational complexities, it has shown our algorithm has better performance.3. Based on the generalized phase reconstruction algorithm proposed in this dissertation, we build up a corresponding experimental setup for 3-D digital imaging. The experiment results show the validity of proposed algorithm.4. Taking advantage of digital projection, we built up an automatic fringe imags acquisition, management and processing system, which can realize the multiresolution 3-D range image reconstruction.5. The new methods developed by our research group are realized in the software system. The structure of 3-D digitizing software is re-designed by a more effective way. Every function module is defined and classed according its function. The file format and data structures are defined for saving and managing the 2-D image/3-D graphics. Through the above improvements, the new software platform will be maintained and updated conveniently.