基于分?jǐn)?shù)階四元數(shù)傅里葉變換的彩色圖像自適應(yīng)水印算法

王金偉; 周春飛; 王水平; 陳北京; 孫星明

doi:10.11999/JEIT160169

基于分?jǐn)?shù)階四元數(shù)傅里葉變換的彩色圖像自適應(yīng)水印算法

doi: 10.11999/JEIT160169

2.
(南京信息工程大學(xué)計(jì)算機(jī)與軟件學(xué)院南京 210044) ②(南京信息工程大學(xué)江蘇省網(wǎng)絡(luò)監(jiān)控工程中心南京 210044)

基金項(xiàng)目:

國家自然科學(xué)基金(61272421, 61572258, 61232016, 61572257)，江蘇省自然科學(xué)基金(BK20151530, BK20150925)，江蘇高校優(yōu)勢學(xué)科建設(shè)工程資助項(xiàng)目(PAPD)，江蘇省大氣環(huán)境與裝備技術(shù)協(xié)同創(chuàng)新中心資助項(xiàng)目(CICAEET)

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出版歷程
- 收稿日期: 2016-02-25
- 修回日期: 2016-07-01
- 刊出日期: 2016-11-19

Color Image Adaptive Watermarking Algorithm Using Fractional Quaternion Fourier Transform

2.
(School of Computer &

Funds:

The National Natural Science Foundation of China (61272421, 61572258, 61232016, 61572257), The Natural Science Foundation of Jiangsu Province (BK20151530, BK20150925), The Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), The Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology (CICAEET)

摘要

摘要: 針對(duì)現(xiàn)有一些彩色圖像自適應(yīng)水印算法在自適應(yīng)過程中未充分考慮色彩信息或者在嵌入過程中未考慮彩色載體圖像分量的整體性等不足，該文提出一種基于分?jǐn)?shù)階四元數(shù)傅里葉變換(FrQFT)的彩色圖像自適應(yīng)數(shù)字水印算法。首先利用人類視覺系統(tǒng)(HVS)提取彩色載體圖像塊的紋理、邊緣和色調(diào)掩蔽特性，并依據(jù)這些特性對(duì)適合嵌入圖像塊自適應(yīng)分配嵌入強(qiáng)度，然后在FrQFT域以自適應(yīng)強(qiáng)度采用量化索引調(diào)制算法和冗余嵌入策略嵌入水印。實(shí)驗(yàn)結(jié)果表明，該算法優(yōu)于現(xiàn)有的基于四元數(shù)傅里葉變換(QFT)的算法以及基于分?jǐn)?shù)階傅里葉變換(FrFT)的算法，具有較好的不可見性和魯棒性。
- 彩色圖像 /
- 自適應(yīng)水印 /
- 四元數(shù) /
- 分?jǐn)?shù)階傅里葉變換
Abstract: Some existing color image adaptive watermarking algorithms do not fully utilize the color information in the adaptive process, or do not consider the holistic property of the components of a color host image. To overcome these drawbacks, this paper proposes a color image adaptive watermarking algorithm based on Fractional Quaternion Fourier Transform (FrQFT). Firstly, the texture, edge and color tone features of the blocks of the host image are extracted using the Human Vision System (HVS). After that, the embedding strength values of the blocks suitable to watermark embedding are set adaptively according to the extracted feature. Finally, the quantization index modulation and the multiple redundant embedding strategy are used to insert the watermark in the FrQFT domain with the adaptive strength. Experimental results show that the proposed algorithm is superior over the existing algorithm using Quaternion Fourier Transform (QFT) and the algorithm based on Fractional Fourier Transform (FrFT).
- Color image /
- Adaptive watermarking /
- Quaternion /
- Fractional Fourier Transform (FrFT)

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