高品質數位影像的色彩管理控制─以不同流程參數製訂之描述檔為例

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Title:	高品質數位影像的色彩管理控制─以不同流程參數製訂之描述檔為例
Authors:	陳鄭德
Contributors:	資訊傳播學系
Keywords:	色彩管理色彩描述檔數位攝影
Date:	2010
Issue Date:	2011-11-14 14:30:12 (UTC+8)
Abstract:	在數位時代的今天，因為影像的擷取是透過鏡頭將光源的反射以電子訊號的方式在感光元件CCD或CMOS上做紀錄，也就是數值0與1的紀錄，所以我們可以透過數學利用不同的色彩校正方式，對設備做到色彩校正的工作。本研究運用不同的色彩描述檔製作流程，探討不同的色彩描述檔的使用對於色彩複製準確度的影響。同時實驗在相機拍攝時，透過曝光值的不同設定、不同特性曲線的變化，以及非線性校正的方式輸出影像檔，再據以製作色彩描述檔以複製色彩，最後與導表影像色塊實際值進行色差比較。本研究中實驗以GretagMacbeth ColorChecker 24 導表及Tiffen Q13導表為測試導具，以色彩管理內處理與外處理方式拍攝測試導表。實驗結果發現，在第一項實驗以曝光改變的方式及第二項實驗的特性曲線套用，對於色彩複製的表現差異不大，第三項實驗以非線性校正流程製作之色彩描述檔的色彩複製表現為最佳結果。希望所得之結果能做為數位相機色彩管理效能之基本參考依據。 Digital image is formed by the light that reflected from the light source, through a lens and captured by the sensor as electronic signals. The color correction for device can be processed by mathematic models in different ways. Currently, the ICC profile is the most popular method in correcting color photographs. The objective of this study is to test the performance of various ICC profiles that made from different procedures. The influence of various exposure settings, different build-in characteristic curves and a nonlinear correction method are also tested. The performance is evaluated by color difference value between the target color checker and its reproduction. It is intended to offer these results as a benchmark reference to ICC profile performance for color management on digital camera.
Appears in Collections:	[Department of Information Communications & Graduate Institute of Information Communications ] thesis

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