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研究所論文題目及簡介
題目:藉由正確的亮度估測以實現 Color Filter Array Demosaicking
簡介:
在目前的消費型數位相機中,或者是手機上的數位相機,由於成本上的因素,
所以都只會有一顆感光元件(CCD or CMOS)。也就是說無法在每一個點上都感測
到紅色、綠色、藍色的亮度,而是每個點只能感測三個顏色其中一個的亮度。也就
是說光線經過鏡頭之後會經過如上圖的 Bayer Color Filter Array,才會進入感光
元件。也就是說我們從感光元件讀到的資料已經少了三分之二。而從 Bayer CFA
的資料還原(插補)成每個點都有紅色、綠色、藍色的資訊就稱為 Demosaicking。
目前國外的學者針對 Demosaicking 依據人家的視覺特性提出了一個新的方法,
然而其運算卻過於複雜。為了使其演算法具有實用性,必需減少其運算量的需求
而在此同時,又不能減少太多的品質,甚至需要針對影像中高頻的部分加以強
化,使 Demosaicking 的結果不單單只是數據上的優劣,更是符合人類喜好的結
果。

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研究所論文題目及簡介 (1)

  • 1. 研究所論文題目及簡介 題目:藉由正確的亮度估測以實現 Color Filter Array Demosaicking 簡介: 在目前的消費型數位相機中,或者是手機上的數位相機,由於成本上的因素, 所以都只會有一顆感光元件(CCD or CMOS)。也就是說無法在每一個點上都感測 到紅色、綠色、藍色的亮度,而是每個點只能感測三個顏色其中一個的亮度。也就 是說光線經過鏡頭之後會經過如上圖的 Bayer Color Filter Array,才會進入感光 元件。也就是說我們從感光元件讀到的資料已經少了三分之二。而從 Bayer CFA 的資料還原(插補)成每個點都有紅色、綠色、藍色的資訊就稱為 Demosaicking。 目前國外的學者針對 Demosaicking 依據人家的視覺特性提出了一個新的方法, 然而其運算卻過於複雜。為了使其演算法具有實用性,必需減少其運算量的需求 而在此同時,又不能減少太多的品質,甚至需要針對影像中高頻的部分加以強 化,使 Demosaicking 的結果不單單只是數據上的優劣,更是符合人類喜好的結 果。