National Changhua University of Education Institutional Repository : Item 987654321/1730

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NCUEIR > College of Engineering > Department and Graduate Institute of Computer Science and Information Engineering > Periodical Articles > Item 987654321/1730

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/1730

Title:	A DWT Based Approach for Image Steganography
Authors:	Po-Yueh Chen;Hung-Ju Lin
Contributors:	資訊工程學系
Keywords:	Discrete Wavelet Transform Security Steganography
Date:	2006-04
Issue Date:	2010-11-12T07:15:16Z
Abstract:	In this paper we propose a new steganography technique which embeds the secret messages in frequency domain. According to different users’ demands on the embedding capacity and image quality, the proposed algorithm is divided into two modes and 5 cases. Unlike the space domain approaches, secret messages are embedded in the high frequency coefficients resulted from Discrete Wavelet Transform. Coefficients in the low frequency sub-band are preserved unaltered to improve the image quality. Some basic mathematical operations are performed on the secret messages before embedding. These operations and a well-designed mapping Table keep the messages away from stealing, destroying from unintended users on the internet and hence provide satisfactory security.
Relation:	International Journal of Applied Science and Engineering, 3, 2006:275-290
Appears in Collections:	[Department and Graduate Institute of Computer Science and Information Engineering] Periodical Articles

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