基于拓展廣義整數(shù)變換的無損信息隱藏方法
doi: 10.11999/JEIT150477 cstr: 32379.14.JEIT150477
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2.
(福州大學數(shù)字媒體研究院 福州 350002) ②(華僑大學信息科學與工程學院 廈門 361021)
基金項目:
國家自然科學基金(61302094)和福建省自然科學基金(2014J01242)
Expanded Generalized Integer Transform Based Lossless Informaiton Hiding Method
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2.
(Research Academy of Digital Media, Fuzhou University, Fuzhou 350002, China)
Funds:
The National Natural Science Founclation of China (6132094)
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摘要: 為使用于無損信息隱藏的廣義整數(shù)變換更具普遍意義并提高數(shù)據(jù)嵌入容量，該文在對廣義整數(shù)變換進行拓展的基礎(chǔ)上提出一種圖像無損信息隱藏新方法。該方法通過對廣義整數(shù)變換引入可變參數(shù)m進行拓展，可在n個像素點組成的圖像塊中嵌入m(n-1) bit數(shù)據(jù)，m＞1時提高了數(shù)據(jù)嵌入容量，方法還采用一種新的數(shù)據(jù)嵌入策略提高了隱藏圖像質(zhì)量。與現(xiàn)有整數(shù)變換算法相比，該文算法在數(shù)據(jù)嵌入容量和隱藏圖像質(zhì)量上有一定的提升。該方法可用于對圖像質(zhì)量要求較高的軍事通信、醫(yī)學保健和法律論證等領(lǐng)域，在提取嵌入的機密信息后，原宿主圖像可無失真恢復。
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關(guān)鍵詞:
- 無損信息隱藏 /
- 廣義整數(shù)變換 /
- 拓展 /
- 嵌入容量
Abstract: To make the generalized interger transform used for lossless information hiding more generalized and improve the data embedded capacity, a new lossless information hiding method based on expanded generalized integer transform is proposed for image. By introducing the variable parameterm and expanding the generalized integer transform, m(n-1) bit data can be embedded into one image block withn pixels, improving the embedded capacity whenm＞1. Besides, 5 the method uses a new data embedding strategy to improve the quality of the hidded image. Compared with current integer transform algorithms, there is a certain improvement in the embedded capacity and the quality of hidded image with the proposed algorithm. The proposed method can be used to some important and sensitive areas, i.e. military comunication, healthcare, and law-enforcement, after extracted the embedded secret data, the cover image can be recovered losslessly.-
Key words:
- Lossless information hiding /
- Generalized integer transform /
- Expand /
- Embedded capacity
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