文章基本信息

标题：Steganography using Coefficient Replacement and Adaptive Scaling based on DTCWT
作者：Mr. N Sathisha ; Dr. K Suresh Babu ; Dr. K. B. Raja 等
期刊名称：International Journal of Image Processing (IJIP)
电子版ISSN：1985-2304
出版年度：2015
卷号：9
期号：2
页码：41-60
出版社：Computer Science Journals
摘要：Steganography is an authenticated technique for maintaining secrecy of embedded data. Steganography provides hardness of detecting the hidden data and has a potential capacity to hide the existence of confidential data. In this paper, we propose a novel steganography using coefficient replacement and adaptive scaling based on Dual Tree Complex Wavelet Transform (DTCWT) technique. The DTCWT and LWT 2 is applied on cover image and payload respectively to convert spatial domain into transform domain. The HH sub band coefficients of cover image are replaced by the LL sub band coefficients of payload to generate intermediate stego object and the adaptive scaling factor is used to scale down intermediate stego object coefficient values to generate final stego object. The adaptive scaling factor is determined based on entropy of cover image. The security and the capacity of the proposed method are high compared to the existing algorithms.
关键词：Steganography; DTCWT; LWT; Stego Image; Cover Image; Adaptive Scaling; Entropy.