Analysis of wavelet and contourlet transform based image watermarking techniques

Chalamala, Srinivasa Rao; Kakkirala, Krishna Rao; Mallikarjuna, Rao G. Bala

doi:10.1109/iadcc.2014.6779483

Cited by 3 publications

(4 citation statements)

References 7 publications

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Section: )Wavelet Transform Processing Of the Imagementioning

confidence: 99%

“…Since the late 1980s Wavelet analysis theory has become internationally very active area of research, it has been widely used in image processing, oil exploration, data compression, CT imaging, fractal geometry, and many other fields [7][8][9]. Suppose Vj is the given multi-scale analysis, φ and ψ are the corresponding scaling function and wavelet function, for a given discrete signal {Sk, k ∈ Z} ∈ V0 (here the corresponding resolution is j = 0), the expansion translation system of V0 space is {φj, k, k ∈ Z}, we can construct a function f (u) ∈ V0 inV0 space ,…”

Section: )Wavelet Transform Processing Of the Imagementioning

confidence: 99%

“…In algorithm that proposed in this paper, first use the Logistic mapping (3) and Chebyshev mapping (8) to alternately generate mixed chaotic sequence, then use mixed chaotic sequence to produce the corresponding permutation matrix and offset matrix.…”

mentioning

confidence: 99%

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Design of Digital Image Encryption Algorithm Based On Mixed Chaotic Sequences

Chen¹,

Wang²,

Wang³

2014

International Journal on Smart Sensing and Intelligent Systems

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Abstract-Digital image scrambling is to transform a digital image, to make it unrecognizable and become another chaos images without obvious meaning. If the operator knows the algorithms, he can reconstruct the original image from the chaos image by using the certain algorithms. Image scrambling encryption technology that based on Chaos Theory encrypts the image data stream through using the chaotic signal. It has the advantage like high security, encryption speed, large key space, and good scrambling effect. This paper studies the "extraordinary Key" and "to be trivial key" that are in the chaotic sequences that is caused by Logistic map, thus presents a image chaotic encryption algorithm that is based on hybrid chaotic sequence. Firstly, the algorithm generate hybrid chaotic sequence through the key; then through generates the corresponding offset matrix and permutation matrix the discrete mapping; finally, do the implementation of wavelet transform to the image, do the digital image scrambling encryption in the transform domain. In order to measure the degree of scrambling, we propose a "scrambling degree" concept. Experiments confirmed that the encryption algorithm has good scrambling in nature, and achieved good encryption effect. It confirmed the degree of scrambling encryption can effectively reflect the effect of scrambling encryption of the algorithm.

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Section: )Wavelet Transform Processing Of the Imagementioning

confidence: 99%

Section: )Wavelet Transform Processing Of the Imagementioning

confidence: 99%

See 1 more Smart Citation

Design of Digital Image Encryption Algorithm Based On Mixed Chaotic Sequences

Chen¹,

Wang²,

Wang³

2014

International Journal on Smart Sensing and Intelligent Systems

View full text Add to dashboard Cite

show abstract

“…In this regard, watermarking algorithms based on different transform domains such as the DFT (Discrete Fourier Transform) [6], DCT (Discrete Cosine transform) [7], DWT(Discrete Wavelet Transform) [8], Contourlet Transform [9] and others have been proposed [10]. ORuanaidh et al [11] initially proposed in the use of DFT phase for watermarking.…”

Section: Introductionmentioning

confidence: 99%