National Changhua University of Education Institutional Repository : Item 987654321/1730
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题名: A DWT Based Approach for Image Steganography
作者: Po-Yueh Chen;Hung-Ju Lin
贡献者: 資訊工程學系
关键词: Discrete Wavelet Transform
Security
Steganography
日期: 2006-04
上传时间: 2010-11-12T07:15:16Z
摘要: 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.
關聯: International Journal of Applied Science and Engineering, 3, 2006:275-290
显示于类别:[資訊工程學系] 期刊論文

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