在本論文中，我們提出兩個頻率域浮水印的演算法。一個
是以餘弦轉換為基底，利用多區域多頻段的嵌入方式，確
保在非蓄意破壞下，能夠取得一組失真較小的浮水印數列
(watermark sequence)；另一個方法是以小波轉換為基
底，利用EZW演算法中的父-子樹狀結構關係，及位元平面
的編碼的特色，嵌入浮水印，使得在漸進式傳送系統中可
偵測出浮水印的存在與否。經由實驗結果發現提出的兩個
架構皆可有效防止非蓄意破壞的影像處理攻擊，以小波轉
換為基底的方式，更具備漸進式偵測的能力。

In this thesis, we proposed two frequency-based
watermarking algorithms. One is DCT-based method.
Embedding watermark in the multi-areas and multi-
frequency bands to ensure we can get a less
distorted watermark sequence under unintentional
circumstance. The other is DWT-based method. The
parent-children relationship and the feature of
bit-plane coding in the EZW algorithm are
exploited to embed watermark. It makes that we
can know the watermark exist or not in the
progressive transmission system. The experimental
results show that the proposed methods both can
resist unintentional attacks. The DWT-based
method also has a better progressive detection
capability.

1. 導論 1
1.1 論文架構 1
1.2 動機 1
2. 相關研究 3
2.1 基本要件 3
2.2 型態及應用 5
2.3 嵌入方法 7

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