結合統計分析之相位展開技術研究
碩士 === 國立中興大學 === 機械工程學系 === 91 === Phase unwrapping is a necessary step for phase retrievals. The unwrapping works could be intuitively divided into two categories. One is to unwrap phase maps directly by noise-immune algorithm, and the other is to apply a suitable filter to reduce the number of ph...
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| Format: | Others |
| Language: | zh-TW |
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2003
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| Online Access: | http://ndltd.ncl.edu.tw/handle/15718751813485955340 |
| Summary: | 碩士 === 國立中興大學 === 機械工程學系 === 91 === Phase unwrapping is a necessary step for phase retrievals. The unwrapping works could be intuitively divided into two categories. One is to unwrap phase maps directly by noise-immune algorithm, and the other is to apply a suitable filter to reduce the number of phase inconsistencies of the wrapped map so as to simplify the following unwrapping implementations.
Local histogram is adopted in this study to eliminate phase inconsistencies of noisy wrapped map. Computational Simulation and experimental verification show that the filtered result is better than that achieved in other ways. Contrarily, a global and local hybrid algorithm is developed to by pass the inconsistency-related problems of a noisy wrapped map to yield its true phase field directly.
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