基于DCT變換的圖像偽裝技術(shù)
DCT-BASED IMAGE HIDING ALGORITHM
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摘要: 該文提出一種頻域的信息偽裝技術(shù),該技術(shù)具有以下幾個(gè)優(yōu)點(diǎn):(1)隱藏效果好,人眼系統(tǒng)不能發(fā)覺(jué)隱藏了秘密圖像的載體圖像與原載體圖像之間的差別;(2)口令控制,只有知曉偽裝口令的人才能解密;(3)可以有效地抵抗JEPG等圖像壓縮編碼的破壞;(4)利用載體圖像的部分內(nèi)容可以恢復(fù)原秘密圖像;(5)該算法可以用于數(shù)字水印,而且可以將水印圖像由二值圖像擴(kuò)展到灰度圖像;(6)算法可以進(jìn)行多址偽裝,即在同一幅載體圖像中隱藏多幅秘密圖像。
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關(guān)鍵詞:
- 信息偽裝; 數(shù)字水印; DCT; DWT
Abstract: A new DCT-based information hiding algorithm is presented in this paper. The excellent features of the new method are: (1) the difference between the carrier image containing the secret and the original one is perceptually invisible; (2) the embedded secret image can be retrieved only by using a secret key; (3) it is robust against JPEG encode; (4) the embedded secret image can be extracted from part of carrier image containing the secret; (5) the method can be used to embed watermark into images, and the watermark may be an image ranged from 2 color to 256 or more color; (6) more than one secret, image can be hide into a single carrier image. -
C.J. Kuo, Novel image encryption technique and its application in progress transmission. Journal of Electronic Imaging, 1993, 2(4), 345-351.[2]S. Schwartz, A new graphical method for encryption of computer data. Cryptologia, 1991. 15(1),43-46.[3]Tung-Shou Chen, Chin-Chen Chang, Min-Shiang Hwang, A virtual image cryptosystem based upon vector quantization, IEEE Trans. on Image Processing, 1998. IP-7(10), 1485-1488.[4]丁瑋,齊東旭,數(shù)字圖像變換及信息隱藏與偽裝技術(shù),計(jì)算機(jī)學(xué)報(bào),1998,21(9),838-843. -
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