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| A Novel Technique for Image Steganography Based on DWT and Huffman Encoding
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Full
text: |
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Source |
International Journal of Computer Science and Security (IJCSS) |
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Table of Contents |
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Complete Issue PDF(4.93MB) |
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Volume: 4 Issue: 6 |
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Pages: 497-610 |
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Publication
Date: January / February |
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ISSN
(Online): 1985-1553 |
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Pages |
561 - 570 |
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Author(s) |
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Published
Date |
08-02-2011 |
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Publisher |
CSC
Journals, Kuala Lumpur,
Malaysia |
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ADDITIONAL
INFORMATION |
| Keywords Abstract References Cited by Related Articles Collaborative
Colleague |
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KEYWORDS: Visualization, Wiki, Knowledge Discovery, Search Engine |
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| Image steganography is the art of hiding information into a cover image. This paper presents a novel technique for Image steganography based on DWT, where DWT is used to transform original image (cover image) from spatial domain to frequency domain. Firstly two dimensional Discrete Wavelet Transform (2-D DWT) is performed on a gray level cover image of size M × N and Huffman encoding is performed on the secret messages/image before embedding. Then each bit of Huffman code of secret message/image is embedded in the high frequency coefficients resulted from Discrete Wavelet Transform. Image quality is to be improved by preserving the wavelet coefficients in the low frequency sub-band. The experimental results show that the algorithm has a high capacity and a good invisibility. Moreover PSNR of cover image with stego-image shows the better results in comparison with other existing steganography approaches. Furthermore, satisfactory security is maintained since the secret message/image cannot be extracted without knowing decoding rules and Huffman table. |
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N. Dey , A. Bardhan Roy and S. Dey, “A Novel Approach of Color Image Hiding using RGB Color planes and DWT”, International Journal of Computer Applications, 36(5), pp. 19-24, December 2011.
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N. Dey , A. Bardhan Roy and S. Dey, “A Novel Approach of Color Image Hiding using RGB Color planes and DWT”, International Journal of Computer Applications, 36(5), pp. 19-24, December 2011.
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P.Nithyanandam , T.Ravichandran , N.M.Santron and E. Priyadharshini, “A Spatial Domain Image Steganography Technique Based on Matrix Embedding and Huffman Encoding”, International Journal of Computer Science and Security (IJCSS), 5(5), pp. 456 – 468, 2011.
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| Debasree Sarkar : Colleagues
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| Amitava Nag : Colleagues
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| Sushanta Biswas : Colleagues
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| Partha Pratim Sarkar : Colleagues
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