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科技與工程學院
電機工程學系
學位論文
學位論文
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http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/73890
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search.filters.author.Xiang-Ting Huang
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search.filters.author.黃湘婷
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search.filters.subject.嵌入式系統
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search.filters.subject.embedded system
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search.filters.subject.high dynamic range
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search.filters.subject.tone reproduction
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search.filters.subject.色調重現
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影像錄製系統之即時色調重現
(
2012
)
黃湘婷
;
Xiang-Ting Huang
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這篇論文提出一個適用於拍攝高動範圍情境之即時色調重現演算法,並提出嵌入式系統實作技術,達到即時影像處理的目標。本演算法中,首先使用影像濾波器將輸入影像分成高頻與低頻兩個圖層,針對低頻圖層進行多次色調重現處理,以壓縮低頻圖層資訊的動態範圍,再加上高頻圖層的資訊,以達到保留高頻影像細節的目標,並有效提升暗處區域的可見度與影像細節之對比度。此外,為了減少影像處理時間以及保持畫面亮度的穩定性,視訊中的前後連續畫面分享同樣的色調曲線,使畫面不閃爍。本論文並提出多項實作本演算法於嵌入式系統的實務技術,利用系統晶片平台所內建之影像計算加速器,達成處理VGA (640 x 480 pixels) 畫面的條件下,可達每秒30個畫面(frames/s)以上的高效能表現。
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