臺灣博碩士論文加值系統

JPEG是現今的一種影像壓縮技術，壓縮率高，在某個壓縮率底下人眼所能識別的視覺效果很好。但是要用更高的壓縮率來壓縮影像的話，則會產生區塊效應(block effect)。此時為了因應日漸而來的高畫質影像，為了得到較高的壓縮率，所以產生了JPEG2000這個技術。JPEG2000是由 The Joint Photographic Experts Group (JPEG) committee 在1996提出最新的一套的壓縮技術，在此套技術上，我們能夠更輕易的提升壓縮率，而且其視覺效果卻絲毫不比JPEG遜色，反而有過之而無不及。

目錄…………………………………………………………………………… I
圖目錄…………………………………………………………………………V
第一章 導論……………………………………………………………...1
第二章 相關的研究……………………………………………………...6
2.1 強健性…………………………………………………………...6
2.2 認證和版權保護………………………………………………...8
2.3 其他……………………………………………………………...9
第三章 我們的方法…………………………………………………….10
3.1 JPEG2000的簡介……………………………………………...10
3.1.1 離散小波轉換 (DWT)……………………………….11
3.1.2 量化 (Quantization)……………………………..15
3.1.3 熵編碼 (Entropy coding)………………………..15
3.1 Our method……………………………………………………..17
3.2.1 watermark embedding……………………………..17
3.22 watermark detection…………………………….20
第四章 實驗結果……………………………………………………….21
第五章 結論…………………………………………………………….56
參考文獻……………………………………………………………………..57

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