Color Coupling and Imbalance Correction Methods for 3D Shape Measurement
碩士 === 國立臺灣大學 === 機械工程學研究所 === 96 === This thesis studies an intensity correction method to reduce errors induced by color coupling and color imbalance for measuring 3D shapes of objects. First, 3D look-up table (LUT) is established for storing the difference between the assigned projected intensiti...
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ndltd-TW-096NTU054891672015-11-25T04:04:37Z http://ndltd.ncl.edu.tw/handle/57158289886730802929 Color Coupling and Imbalance Correction Methods for 3D Shape Measurement 三維外形量測之色彩耦合及不平衡校正方法 Chang Han-Chung 張瀚中 碩士 國立臺灣大學 機械工程學研究所 96 This thesis studies an intensity correction method to reduce errors induced by color coupling and color imbalance for measuring 3D shapes of objects. First, 3D look-up table (LUT) is established for storing the difference between the assigned projected intensities and the measured intensities. Our objective is to find he corresponding input color given the measured color, which is the reverse process of the creation of the look-up table. For this purpose, we developed a search algorithm. The two methods are developed to compensate for errors caused by color coupling and imbalance. In addition, the two methods are used to further reduce nonlinear digital fringe error. An integrated program is developed by combing phase-shifting process, phase-wrapping process, phase-unwrapping process, and intensity correction. With the developed program, several measurement examples are investigated. The results demonstrate that the purposed advanced error correction strategy offers good feasibility for improving the quality of reconstructed 3D shapes. Tien-Tung Chung 鍾添東 2008 學位論文 ; thesis 89 zh-TW |
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碩士 === 國立臺灣大學 === 機械工程學研究所 === 96 === This thesis studies an intensity correction method to reduce errors induced by color coupling and color imbalance for measuring 3D shapes of objects. First, 3D look-up table (LUT) is established for storing the difference between the assigned projected intensities and the measured intensities. Our objective is to find he corresponding input color given the measured color, which is the reverse process of the creation of the look-up table. For this purpose, we developed a search algorithm. The two methods are developed to compensate for errors caused by color coupling and imbalance. In addition, the two methods are used to further reduce nonlinear digital fringe error. An integrated program is developed by combing phase-shifting process, phase-wrapping process, phase-unwrapping process, and intensity correction. With the developed program, several measurement examples are investigated. The results demonstrate that the purposed advanced error correction strategy offers good feasibility for improving the quality of reconstructed 3D shapes.
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Tien-Tung Chung |
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Tien-Tung Chung Chang Han-Chung 張瀚中 |
author |
Chang Han-Chung 張瀚中 |
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Chang Han-Chung 張瀚中 Color Coupling and Imbalance Correction Methods for 3D Shape Measurement |
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Chang Han-Chung |
title |
Color Coupling and Imbalance Correction Methods for 3D Shape Measurement |
title_short |
Color Coupling and Imbalance Correction Methods for 3D Shape Measurement |
title_full |
Color Coupling and Imbalance Correction Methods for 3D Shape Measurement |
title_fullStr |
Color Coupling and Imbalance Correction Methods for 3D Shape Measurement |
title_full_unstemmed |
Color Coupling and Imbalance Correction Methods for 3D Shape Measurement |
title_sort |
color coupling and imbalance correction methods for 3d shape measurement |
publishDate |
2008 |
url |
http://ndltd.ncl.edu.tw/handle/57158289886730802929 |
work_keys_str_mv |
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1718136188653535232 |