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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 鍾添東(Tien-Tung Chung) | |
| dc.contributor.author | Chang Han-Chung | en |
| dc.contributor.author | 張瀚中 | zh_TW |
| dc.date.accessioned | 2021-06-08T07:34:12Z | - |
| dc.date.copyright | 2008-04-18 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2008-04-10 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/26953 | - |
| dc.description.abstract | 本論文主要研究在數位條紋投影法中，因色彩耦合與不平衡效應產生的誤差，並提出強度校正策略。首先建立一個三維強度查詢表，用來儲存電腦中設計的理想強度與實際量測強度之間的差異。之後逆向操作三維強度查詢表，目的是找出量測強度所對應的投影強度，為了這個目的，我們發展出一套搜尋方法。這兩個方法可以補償色彩耦合和不平衡效應所造成的誤差，除此之外，非線性數位條紋誤差也可以透過此方法降低誤差。本文整合一套結合相位移步驟、相位壓縮步驟、相位展開步驟、強度校正的整合程式。利用此程式，測試數個量測範例。透過不規則曲面、不同表面色彩與材質待測物的三維外形量測結果可知，本文提出之誤差校正策略能有效改善重建輪廓品質。 | zh_TW |
| dc.description.abstract | 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. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-08T07:34:12Z (GMT). No. of bitstreams: 1 ntu-96-R94522622-1.pdf: 3901082 bytes, checksum: d67a9e2353865ccbee414077d5bf683c (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | 摘要 i
Abstract ii 目錄 iii 圖目錄 v 表目錄 vii 第一章 緒論 1 1.1研究背景 1 1.2文獻回顧 5 1.3研究方法與目的 10 1.4研究方法 11 1.5 論文大綱 12 第二章 數位條紋投影法研究原理 13 2.1前言 13 2.2三角量測法 13 2.3相位移法的介紹 15 2.3.1 步數的選擇 15 2.3.2 相位移的編碼 17 2.3.3 條紋的設計 17 2.3.4相位移法的原理 19 2.4相位重建 21 2.4.1不連續點的檢測 23 2.4.2分枝切割線演算法 24 2.5影像-空間之座標轉換 25 第三章 彩色條紋強度校正 28 3.1 彩色耦合效應 28 3.2 彩色不平衡效應 31 3.3設備非線性誤差分析 33 3.4 彩色條紋強度補償法 34 3.4.1彩色不平衡效應的補償 34 3.4.2彩色耦合效應的補償 34 3.4.3 設備非線性效應之補償 36 3.4.4軟體強度補償法 36 3.4.5建構3-D LUTs 37 3.4.6 強度差搜尋法 38 3.5 補償結果 39 第四章 實作成果 43 4.1 量測系統架構 43 4.1.1 影像感應器規格 44 4.1.2投影機規格 46 4.2 程式架構與流程 47 4.3 量測解析度 49 4.4 量測精確度 50 4.5 量測成果 53 4.5.1 白色物體之量測成果 54 4.5.2彩色物體之量測成果 58 4.5.3 人體外形之量測成果 61 第五章 結論與建議 63 5.1 結論 63 5.2 建議 64 參考文獻 65 附錄A 相機控制程式碼及操作說明 68 A.1 程式之前置設定與執行方法 68 A.2 操作介面 68 A.3 操作說明 71 A.4 程式說明 73 附錄B 影像後處理之程式碼及操作說明 78 B.1 功能介紹 79 B.2 CFP程式操作說明 81 B.3 程式說明 83 附錄C資料點對位與整合操作說明 86 C.1 基本需求 86 C.2 環境設定 86 C.3 程式操作說明 87 作者簡歷 89 | |
| dc.language.iso | zh-TW | |
| dc.subject | 相位展開 | zh_TW |
| dc.subject | 相位壓縮 | zh_TW |
| dc.subject | 彩色耦合效應 | zh_TW |
| dc.subject | 相位移法 | zh_TW |
| dc.subject | 彩色不平衡效應 | zh_TW |
| dc.subject | phase-unwrapping | en |
| dc.subject | color coupling | en |
| dc.subject | color imbalance | en |
| dc.subject | look-up table | en |
| dc.subject | phase-shifting | en |
| dc.subject | phase-wrapping | en |
| dc.title | 三維外形量測之色彩耦合及不平衡校正方法 | zh_TW |
| dc.title | Color Coupling and Imbalance Correction Methods
for 3D Shape Measurement | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 96-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 史建中,林陽泰 | |
| dc.subject.keyword | 相位移法,相位壓縮,相位展開,彩色耦合效應,彩色不平衡效應, | zh_TW |
| dc.subject.keyword | color coupling,color imbalance,look-up table,phase-shifting,phase-wrapping,phase-unwrapping, | en |
| dc.relation.page | 89 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2008-04-11 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
| 顯示於系所單位： | 機械工程學系 | |
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