https://scholars.lib.ntu.edu.tw/handle/123456789/62559
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor | 鍾添東 | en |
dc.contributor | 臺灣大學:機械工程學研究所 | zh_TW |
dc.contributor.author | 施宜成 | zh |
dc.contributor.author | Shih, Yi-Chen | en |
dc.creator | 施宜成 | zh |
dc.creator | Shih, Yi-Chen | en |
dc.date | 2004 | en |
dc.date.accessioned | 2007-11-28T07:57:25Z | - |
dc.date.accessioned | 2018-06-28T17:07:53Z | - |
dc.date.available | 2007-11-28T07:57:25Z | - |
dc.date.available | 2018-06-28T17:07:53Z | - |
dc.date.issued | 2004 | - |
dc.identifier | zh-TW | en |
dc.identifier.uri | http://ntur.lib.ntu.edu.tw//handle/246246/61337 | - |
dc.description.abstract | 本論文發展一個非接觸式之光學量測系統,擷取投射於待測物上的正弦光柵圖案,藉此測量物體3D輪廓。首先利用電腦程式產生正弦強度分佈的光學條紋圖案,以LCD投影機將其投射於待測物表面。接著以CCD相機擷取四張投射光學條紋影像,此四張影像在一個週期中的相位移角間距各為90度。最後使用相位移技術獲得變形光學條紋的相位分佈,再利用分支切割法計算得到連續的相位分佈,物體3D輪廓便可經由連續的相位分佈轉換而求得。本文使用所發展的方法以測試重建各種待測物之3D輪廓,由所量測的重建結果,可證明本文所發展的非接觸式光學量測系統是有效率且正確的。 | zh_TW |
dc.description.abstract | This thesis develops a non-contact optical measurement system for measuring 3D object profiles from images of projected sinusoidal grating patterns. First, the fringe pattern with sinusoidal intensity is generated by a computer program and projected onto the object surface by a LCD projector. Four images of the projected fringe patterns with phase shift at 90-degree interval for a cycle are taken from the CCD camera. Phase-shifting technique is used to find the phase distribution of the distorted fringe pattern, and the branch cut algorithm is applied to compute the continuous phase distribution. The 3D profiles of the object can be obtained from the continuous phase distribution. 3D profiles of several test objects are reconstructed, and from the measured results, it shows that the developed non-contact optical measurement system can be used efficiently and accurately. | en |
dc.description.tableofcontents | 誌謝 I 中文摘要 II 英文摘要 III 目錄 IV 圖目錄 VI 表目錄 VIII 符號說明 IX 第一章 緒論 1 1.1 研究背景與動機 1 1.2 文獻回顧 2 1.3 研究方法與目的 5 1.4 論文大綱 5 第二章 光柵投射條紋法研究原理 7 2.1 前言 7 2.2 光柵投射條紋與表面高度 8 2.3 相位移技術 9 2.3.1 三步演算法 10 2.3.2 四步演算法 11 2.3.3 五步演算法 12 2.4 相位重建 13 2.4.1 值域擴展 13 2.4.2 不連續點檢測 16 2.4.3 分支切割法 17 2.5 傾斜量校準 19 2.5.1 回歸平面運算 20 2.6 相位與相對高度之轉換 22 第三章 光柵投射量測系統建立 23 3.1 數位影像處理及方法 23 3.1.1 光柵投射及相位移裝置 25 3.1.2 影像擷取裝置 26 3.1.3 正弦波光柵 28 3.1.4 光柵投射系統建立及參數設定 30 3.2 相位移技術步數的選擇 30 3.3 光柵投射系統可量測最大高度差之分析 34 3.4 光柵投射系統對於破洞容忍度之分析 36 第四章 光柵投射及相位移技術之應用 39 4.1 光柵投射系統量測 39 4.1.1 平面量測 39 4.1.2 海豚模型量測 40 4.1.3 小丑模型量測 42 4.1.4 手機模型量測 44 4.1.5 面具量測 46 4.1.6 石膏像臉部表情輪廓量測 48 4.2 不同投射波長對於解析度之影響 50 4.2.1 海豚模型於不同投射波長之量測 50 4.2.2 小丑模型於不同投射波長之量測 53 4.3 待測物表面色彩對於重建結果的影響 57 4.3.1 彩色恐龍模型量測 57 4.3.2 彩色國劇臉譜量測 59 第五章 結論與未來展望 61 5.1 結論 61 5.2 未來展望 62 參考文獻 63 附錄A 相位移技術公式演算推導 67 A.1 三步演算法 67 A.2 四步演算法 69 A.3 五步演算法 70 附錄B 程式安裝及執行說明 73 B.1 光柵產生程式安裝及執行說明 73 B.2 影像擷取與相位計算程式安裝及執行說明 74 B.3 繪出模型程式安裝及執行說明 78 附錄C 影像擷取與相位計算程式函數說明 83 作者簡歷 89 | zh_TW |
dc.language | zh-TW | en |
dc.language.iso | en_US | - |
dc.subject | 分支切割法 | en |
dc.subject | 相位移技術 | en |
dc.subject | 正弦光柵 | en |
dc.subject | sinusoidal grating | en |
dc.subject | phase-shifting technique | en |
dc.subject | branch cut algorithm | en |
dc.title | 利用光學投射條紋重建實體輪廓 | zh |
dc.title | Reconstruction of object profiles from projected fringe patterns | en |
dc.type | thesis | en |
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item.languageiso639-1 | en_US | - |
item.fulltext | no fulltext | - |
item.grantfulltext | none | - |
item.openairetype | thesis | - |
item.openairecristype | http://purl.org/coar/resource_type/c_46ec | - |
item.cerifentitytype | Publications | - |
顯示於: | 機械工程學系 |
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