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研究生: 王泓淳
Hong-Chun Wang
論文名稱: 高動態範圍影像顯示之色彩與色調重現
Color and Tone Reproduction for High Dynamic Range Image Display
指導教授: 高文忠
Kao, Wen-Chung
學位類別: 碩士
Master
系所名稱: 電機工程學系
Department of Electrical Engineering
論文出版年: 2013
畢業學年度: 101
語文別: 中文
論文頁數: 131
中文關鍵詞: 高動態範圍影像色調重現色調映射螢幕校正
英文關鍵詞: HDR imaging, tone reproduction, tone mapping, LCD calibration
論文種類: 學術論文
相關次數: 點閱:212下載:44
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  • 本論文提出一個新的演算法來解決高動態範圍影像在液晶螢幕上的顯示問題,所提出的演算法結合螢幕校正和新的色調映射運算子。螢幕校正可以讓影像在任何一台螢幕上呈現正確的色彩。所提出的色調重現運算子結合攝影色調映射函數和兩個基於區域對比影像和平滑影像所估算出的參數。高動態範圍影像經由本論文所提出的演算法處理後在亮度、對比度、色彩準確性、能見度都有良好的表現,並且沒有對影像造成任何人工現象。

    This paper presents a new algorithm to solve the high dynamic range image display problem in LCD monitor. The proposed algorithm combines the LCD calibration and the new tone mapping operator. The LCD calibration can let image is accurate in color on every monitor. The new tone mapping operator combines the photographic tone mapping function and two new additional items which are based on the local contrast map and the smoothed map. The images processed through the proposed algorithm have better brightness, contrast, color accuracy, and visibility without producing undesired artifacts.

    中文摘要--------------------------------ii 英文摘要--------------------------------iii 誌  謝--------------------------------iii 目  錄--------------------------------iv 圖 目 錄--------------------------------vi 表 目 錄--------------------------------vii 第一章 緒論----------------------------1 1.1 研究動機----------------------------1 1.2 問題描述----------------------------2 1.3 現有研究探討及存在的問題------------4 1.4 提出的方法--------------------------6 第二章 相關背景與研究-------------------7 2.1 攝影色調重現演算法------------------7 2.1.1 前置處理--------------------------7 2.1.2 攝影色調重現全域運算子------------8 2.1.3 攝影色調重現區域運算子------------10 2.2 快速雙邊濾波器色調重現演算法--------12 2.2.1 雙邊濾波器(Bilateral Filter)------12 2.2.2 演算法流程------------------------14 2.3 直方圖等化--------------------------15 2.4 快速頻率分割演算法------------------16 2.5 伽瑪校正----------------------------17 2.6 區域邊緣保留之影像多重分割色調重現--19 2.7 基於梯度之高動態範圍壓縮演算法------23 第三章 演算法設計與架構----------------25 3.1 演算法設計理念----------------------25 3.2 色調重現運算子----------------------27 3.2.1 影像初始調整----------------------28 3.2.2 平均濾波器------------------------32 3.2.3 參數估算--------------------------34 3.2.4 色調映射運算子--------------------41 3.3 螢幕亮度測量及色彩校正--------------46 3.3.1 粒子群聚演算法--------------------46 3.3.2 伽瑪校正--------------------------50 3.3.3 色彩校正--------------------------54 第四章 實驗結果-------------------------64 4.1 實驗結果比較方法--------------------64 4.2 比較攝影色調重現與實驗結果----------64 4.3 比較快速雙邊濾波器色調重現與實驗結果68 4.4 比較直方圖等化與實驗結果------------70 4.5 比較快速頻率分割演算法與實驗結果----72 4.6 比較伽瑪校正與實驗結果--------------74 4.7 螢幕呈現校正後與校正前的實驗結果----76 第五章 結論-----------------------------78 參 考 文 獻--------------------------79 附 錄 A-------------------------------82 附 錄 B-------------------------------122 自  傳--------------------------------127

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