影像式輝度量測儀之特性量測與校正

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姓名

沈於成(Yu-Chen Shen) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

影像式輝度量測儀之特性量測與校正
(Characterization and Calibration of Imaging Luminance Measurement Devices)

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至系統瀏覽論文 (2024-7-1以後開放)

摘要(中)

在拍攝光源時，相機之灰階(Grayscale)和輝度 (Luminance) 彼此之間的轉換關係，會因為離焦的問題而產生換算上的錯誤，針對此問題我們首先提出一套校正流程。探討方法為先利用單一具銳利邊界之光源拍攝不同離焦距離的圖片，並利用擬合曲線分析邊界變化，找出特性參數之關係趨勢，達到可以預測當光源模糊時的位置。接著分析當清楚成像之銳利邊界光源被具有銳利邊界之光源模糊影響時，藉由找出兩個邊界特性將兩個光源進行分開之動作，達到清楚成像之光源的輝度得以恢復正常，為了要驗證在真實情況下究竟是否能夠使用，因此進行實景拍攝並與之前結果進行驗證。

摘要(英)

When taking a picture of a light source, the conversion relationship between the grayscale and the luminance of the camera will be interfered by those defocused light sources. To solve the de-focusing problem, we develop a novel calibration process. By exploring the dependence of the blurred edges of an object-image boundary upon the imaging distance, the distance of the projecting light source can be determined in calibrated imaging system. Then the measuring luminance of the light sources within the focusing range can be refined by removing the contaminated signals from the defocusing light sources. The calibration process has also been verified in practical measurements and analysis.

關鍵字(中)

★ 影像式輝度

關鍵字(英)

★ Imaging Luminance Measurement Devices

論文目次

摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VII
表目錄 XII
第一章緒論 1
1-1.1 研究背景 1
1-2 研究動機與目的 6
第二章基礎原理 8
2-1 光度學 8
2-2 輝度與照度關係 11
2-3 景深 13
2-3-1 模糊圈 13
2-3-2 景深深度 14
2-4 相機成像公式 16
第三章單透鏡系統 20
3-1 單透鏡影像式輝度計實驗架設 20
3-2 影像模糊影響及分析 24
3-2-1 影像模糊 24
3-2-2 光源邊界情況 25
3-2-3 分析光源邊界 27
3-2-4 雙光源分析 30
3.3 總結 35
第四章鏡頭組系統 37
4-1 鏡頭組影像式輝度計實驗架設 37
4-2 影像模糊影響及分析 39
4-2-1影像模糊與分析 39
4-2-2 雙光源分析及還原 43
4-3 不同維度之寬度變化一致驗證 47
4-4 實景拍攝 48
4-5 總結 51
第五章結論 52
參考文獻 54
中英文名詞對照表 57

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指導教授

楊宗勳孫慶成(Tsung-Hsun Yang Ching-Chern Sun)

審核日期

2019-8-22

推文