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研究生: 賴信吉
Xin-Ji Lai
論文名稱: 彩色數位全像術及其色彩校正之研究
A STUDY ON COLOR DIGITAL HOLOGRAPHY AND ITS COLOR CORRECTION
指導教授: 鄭超仁
Cheng, Chau-Jern
杜翰艷
Tu, Han-Yen
學位類別: 碩士
Master
系所名稱: 光電工程研究所
Graduate Institute of Electro-Optical Engineering
論文出版年: 2010
畢業學年度: 98
語文別: 中文
論文頁數: 66
中文關鍵詞: 彩色數位全像色彩校正色調校正色度校正色差多項式回歸色彩校正描述檔
英文關鍵詞: color digital holography, color correction, tone correction, chromatic correction, color difference, poly nominal regression, color profile
論文種類: 學術論文
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  • 本論文主要探討彩色數位全像術(color digital holography)及其重建影像的色彩偏移修正,以達到重建真實彩色影像的目的。因彩色數位全像術有別於傳統彩色照相術,是透過兩道光波的疊加干涉來記錄資訊,因此本論文旨在修正彩色數位全像的記錄過程中所產生的色差(color difference, ΔE)。本研究工作主要是使用色彩校正的演算法來完成色彩偏移的修正,而色彩校正的方式包含色調(tone correction)與色度校正(chromaticity correction)兩個程序。首先利用遞迴演算的方式計算色調的多項式回歸(poly nominal regression)方程式,接著再針對色彩偏移的部分求出重建與標準影像之間的轉換矩陣,最後再將色調與色度校正的方程式,輸出為彩色數位全像系統的色彩校正描述檔(color profile)。內文中敘述色彩校正的演算方式,並用電腦模擬來證實色彩校正的可行性,最後實際應用於光學實驗以驗證之。

    This work investigates the color difference during the optical recording and numerical reconstruction procedure, and proposes a color correction algorithm to perform color reproduction in color digital holography system. Owing to color digital holography is different to traditional color photography, the optical interference are employed to record the amplitude and phase information of the object in the digital holographic process. The color correction algorithm consists of two parts: first, the tone correction that can be used to find the optimal poly nominal regression function by iteratrive procedures; second, the chromaticity correction that can generate a transformation matrix between standard image and reconstructed image for compensating color difference. As a result, the tone and chromaticity correction are used to produce a general-purpose color profile in the color digital holography system for different objects. In this study, we invesigate the color correction method, computer simulation of the color correction algorithm and related optical experiments to verified the system performance.

    論文摘要 I ABSTRACT II 圖目錄 V 表目錄 VIII 第一章 緒論 1 1.1 彩色數位全像術的發展與現況 1 1.2 研究動機及挑戰 4 1.3 文獻分析 5 1.3.1 彩色全像術 5 1.3.2 相移式彩色數位全像術 5 1.3.3 多波長數位全像於三維影像之融合 7 1.3.4 彩色全像術於三維影像之真實色彩重現 9 1.3.5 運用於數位照相機的色彩校正系統 10 1.4 論文架構 12 第二章 彩色數位全像術之原理 14 2.1 彩色全像術之理論與發展 14 2.2 彩色數位全像術之記錄與重建 14 2.2.1 記錄程序 15 2.2.2 重建程序 19 第三章 色度學於彩色數位全像之色彩分析 25 3.1 色度學原理 25 3.1.1 標準色度系統 25 3.1.2 色度值之計算與量測 29 3.1.3 色溫與演色性 31 3.1.4 色差評估 33 3.2 色彩量測之實驗架構 34 3.2.1 彩色影像感測器之光譜響應 35 3.2.2 彩色液晶空間光調制器 37 3.2.3 工作原理 37 3.2.4 特性量測 40 3.2.5 調制範圍選定 41 3.3 數值模擬結果 43 第四章 運用色彩校正模型於彩色數位全像系統 46 4.1 色彩校正模型原理 46 4.1.1 背景補償 47 4.1.2 色調校正程序 48 4.1.3 色度校正程序 49 4.1.4 色彩校正描述檔 50 4.2 彩色數位全像之色彩校正光學實驗 51 4.3 實驗結果及分析 52 4.3.1 系統標準影像 52 4.3.2 背景補償影像 53 4.3.3 色調校正影像 54 4.3.4 色度校正影像 55 4.3.5 色彩校正描述檔於彩色影像之校正 56 4.3.6 色彩校正描述檔於三維彩色影像之校正 58 第五章 結論及未來展望 59

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