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  • 學位論文

基於輔助光源的主動式白平衡演算法

Auto White Balance Algorithm based on Secondary Light Source

指導教授 : 荊宇泰

摘要


一般的自動白平衡演算法,包括灰界理論,最大RGB值法,色域對應法,皆是以估測白點作為運算基礎,透過估測出的白點來進行白平衡校正,如果當環境存在的白點數過少或是不存在白點時,將容易發生較大的白平衡偏差。   本論文主要是研究當環境不存在白點時,先進行原始環境影像的拍攝,再利用輔助光源來獲得另一張混合環境光源與輔助光源的影像,透過對兩組影像分析來計算出較佳的白平衡的結果。

並列摘要


The general auto white balance algorithms , including the gray world theory, the maximum RGB value theory, the gamut mapping theory, white points estimates are based for white balance correction. When the environment has too few white points or white points are not existed, the white balance result will be not good.   The purpose of this study is to do white balance correction with secondary light source when the environment has no white points. To take the original image in the environment and to take another image with secondary light source , through the analysis of two images to calculate the better white balance results.

並列關鍵字

White Balance Gray World Max RGB Gamut Mapping

參考文獻


[1]Varsha Chikane and Chiou-Shann Fuh,”Automatic White Balance for Digital Still Cameras”,Journal of Information Science and Engineering 22,497-509,2006
[2]汪正良,"利用可能白色區域偵測之自動白平衡演算法",國立成功大學電機工程研究所碩士論文,2007
[4]林秉忠,"攝像模組之影像品質評價系統",國立中央大學光機電工程研究所碩士論文,2007
[3]陳炳旭,"數位相機自動白平衡:結合灰界理論與色域對應之研究",世新大學平面傳播科技學系碩士論文,2003

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