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科技與工程學院
圖文傳播學系
學位論文
學位論文
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http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/73898
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search.filters.author.吳鴻明
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search.filters.subject.Digital halftoning
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search.filters.subject.Digital watermarking
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search.filters.subject.Dot gain
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search.filters.subject.Hybrid halftone dots
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search.filters.subject.數位半色調技術
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Author: search.filters.author.吳鴻明
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混合網點數位浮水印輸出控制研究
(
2007
)
吳鴻明
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混合網點數位浮水印技術,應用調幅網點及調頻網點兩種不同形式的網點,將浮水印藏入半色調影像中,藉由不同形式的網點對複印或是掃描等數位複製設備的取樣差異來進行解碼。實體影像受限於輸出設備因素,只能以半色調的形式來呈現,半色調影像經由人類視覺的模糊化積分後,產生連續調影像的感覺。數位浮水印是在數位影像中藏入標記、圖案、號碼等等資訊,本研究針對混合網點數位浮水印輸出成實體浮水印,考量輸出設備特性,控制網點的大小及疏密程度,使數位浮水印輸出後,得到最佳的隱蔽性,且經由複印機等解碼設備偵測後,可以得到隱藏的資訊。
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