高光譜成像應用於屏幕複合式量測系統之研究

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姓名

樂明(Ming Le) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

高光譜成像應用於屏幕複合式量測系統之研究
(The Study of Hyperspectral Imaging for Screen Imaging Synthesis System)

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摘要(中)

不同於市售儀器量測耗時，超快速光分佈量測儀利用屏幕複合式成像系統一次擷取大範圍光強分佈，並結合待測物旋轉系統以拍攝不同角度之光強分佈，最後透過本團隊所開發之影像融合系統，可快速取得待測光源之配光曲線。
為了對光源進行色彩分佈分析，在基於此儀器之架構下，本論文提出了空間多工之新型屏幕設計，並在相機鏡頭前裝上特殊穿透式光柵，以實現高光譜成像之功能。本論文對高光譜成像量測系統提出了一套影像融合演算法，並針對系統之波長定位、均勻度校正及頻率響應校正皆提出了解決方案。在未來，本儀器僅需透過更換屏幕，與光柵的使用與否，即可在短時間內同時量測光源之強度與色彩分佈。

摘要(英)

In contrast to commercialized machine that have time-wasting measurement issue, Ultrafast Optical Goniometer (UOG) utilizes Screen Imaging Synthesis (SIS) system to acquire a wide range of optical distribution in one-shot. Combining Object under Test (OUT) system, the SIS system can capture different angle of light distribution. Finally, by using the imaging fusion algorithm developed by our team, light distribution curve can be acquired in short period of time.
In order to analyze color distribution of a light source, this thesis proposes a new screen design with spatial multiplexing, and arranges a special transmitting grating in front of the lens to achieve the Hyperspectral Imaging (HSI) measurement. This thesis proposes an imaging fusion algorithm for HIS measurement, and offers a solution for wavelength calibration, uniformity correction and frequency response correction. In the future, UOG can rapidly measure the intensity and color distribution of a light source, through the screen changing and the using of grating.

關鍵字(中)

★ 高光譜成像
★ BSDF
★ 配光曲線
★ 屏幕複合式成像系統

關鍵字(英)

論文目次

摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VIII
表目錄 XV
第一章緒論 1
1-1 研究動機與目的 1
1-2 配光曲線儀(Goniophotometer) 2
1-3 高光譜成像(Hyperspectral Imaging) 4
1-4 論文大綱 8
第二章原理介紹 10
2-1 輻射學(Radiometry) 10
2-1-1 平方反比定理(Inverse Square Law) 14
2-1-2 餘弦三次方定理(Cosine-third law) 15
2-1-3 餘弦四次方定理(Cosine-fourth law) 16
2-2 閃耀光柵(Blazed Grating) 18
2-3 相對色溫(Correlated Color Temperature) 20
2-4 正規化相關係數(Normalized Correlation Coefficient) 23
2-5 雙向散射函數 24
第三章超快速光分佈量測儀(Ultrafast Optical Goniometer) 26
3-1 系統架構 26
3-2 自動控制流程 29
3-2-1 自動曝光時間偵測(Automatic Exposure) 31
3-2-2 高動態影像(High Dynamic Range Image)處理 32
3-3 影像融合演算法簡介 34
3-4 腳踏車燈配光曲線量測結果與比較 40
3-5 結論 41
第四章高光譜成像量測系統 43
4-1 基本原理介紹 43
4-2 波長定位 49
4-3 高光譜成像量測系統演算法 52
4-3-1 高光譜立方體獲取之方法 55
4-3-2 三維(θ，φ，λ)高光譜立方體計算方法 63
4-4 結論 69
第五章高光譜成像量測系統校正與驗證 70
5-1 餘弦三次方校正 70
5-2 均勻度與頻率響應校正 71
5-3 驗證系統－與一維色彩量測結果比較 74
5-3-1 系統校正函數之修正 75
5-3-2 半球封裝形式之 LED 分析及驗證 79
5-3-3 半球加高封裝形式之 LED 分析及驗證 83
5-3-4 無透鏡敷形封裝形式之 LED 分析及驗證 86
5-3-5 碗杯封裝形式之 LED 分析及驗證 90
5-4 結論 94
第六章結論 96
參考文獻 98
中英名詞對照表 102

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指導教授

孫慶成(Ching-Cherng Sun)

審核日期

2017-7-26

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