二維影像融合用於BSDF與配光曲線之研究

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姓名

林芸萱(YUN-HSUAN LIN) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

二維影像融合用於BSDF與配光曲線之研究
(Study of 2D Image Fusion for BSDF and Goniophotometry)

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摘要(中)

屏幕複合式全場域光度儀改善市售之儀器量測耗時的缺點，其利用相機一次擷取大範圍之光形分佈，再結合旋轉台轉動待測物改變不同拍攝角度，就能夠透過影像融合系統整合所有拍攝到的影像，取得待測光源的全場域光強分布，再加上額外照射光源並旋轉待測物以改變入射角便能獲雙向散射分佈函數量測結果。
本文為了使機台能夠同時量測配光曲線，對系統進行改良，增加遠場距離達50公分。為了能夠降低機台體積，將機構改良成旋轉待測物與光源，並使屏幕大小為601×496 (mm2)，在屏幕大小不變的情況下，相對應的必須增加拍攝張數，因此本文提出了半場域量測時的拍攝張數的最佳化解決方案，並且在同一機台上實現了雙向散射分佈函數與配光曲線的量測，其中配光曲線的待測物大小在單一維度可達5公分。

摘要(英)

Screen image synthetic whole-field optical distribution meter overcomes the shortcoming of time consuming of goniophotometer in the current market. It use camera to capture a wide range of light distribution with only one shot. By using rotator to change the picturing aspect, we can synthesize the whole images with aid of image fusion system to form the whole field optical distribution. Moreover, we add light source to illuminate the sample, and rotate the sample to change incident angle to obtain the BSDF measurement result.
In this thesis, in order to measure the optical distribution and BSDF using one instrument. We increase the distance between the sample and the camera up to 50 cm. Besides, in order to reduce the volume of the instrument, the screen size is set as 601×496 (mm2), and the rotational part is the sample with light source instead of the imaging system. Since the screen size is limited, the total number of pictures is increased to cover the whole field. Here, we proposed an optimized solution to minimize the total number of pictures in semi-sphered field measurement. BSDF measurement and whole field optical distribution measurement distribution are accomplished with one instrument. The size of the light source in one dimension for the whole field optical distribution measurement achieve 5 cm.

關鍵字(中)

★ 配光曲線
★ 雙向散射分佈函數
★ 屏幕複合式全場域光度儀
★ 全場域
★ 光強分佈

關鍵字(英)

論文目次

目錄
摘要 I
Abstract II
致謝 IV
目錄 VI
圖片目錄 IX
表格目錄 XIII
第一章緖論 1
1-1 散射學之發展 1
1-2 研究動機與目的 2
1-3 論文大綱 5
第二章原理介紹 7
2-1 輻射學（Radiometry） 7
2-1-1 餘弦三次方定理（Cosine-third law） 13
2-1-2 餘弦四次方定理（Cosine-fourth law） 14
2-2 相關性係數(NCC) 15
2-3 光的散射行為 15
2-4 雙向散射分佈函數（BSDF） 17
第三章尺寸限制條件 19
3-1 遠場距離 19
3-2 待測物尺寸限制 20
3-3 結論 22
第四章影像融合系統 23
4-1 系統基本架構 23
4-2 系統模擬 33
4-3 能量修正 37
4-3-1 餘弦三次方修正 37
4-3-2 屏幕散射與鏡頭暈影之校正 38
4-4 驗證系統 40
4-5 優化系統 44
4-6 結論 48
第五章半場域與全場域分析 49
5-1 半場域散射光分佈 49
5-2 全場域散射光分佈 55
5-3 結論 60
第六章量測結果比較 61
6-1 腳踏車頭燈 61
6-2 多功能性LED照明模組L-type 64
6-3 結論 67
第七章結論 68
參考文獻 70
中英文名詞對照表 73

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指導教授

孫慶成(Ching-Chern Sun)

審核日期

2016-8-19

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