文章基本信息

标题：Data Hiding in Color Images Using Modified Quantization Table
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作者：Neha Batra ; Pooja Kaushik
期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2012
卷号：1
期号：8
页码：306-312
出版社：Shri Pannalal Research Institute of Technolgy
摘要：With the rapid growth of of internet and wireless networks, information security becomes significant to protect e-commerce and personal privacy. Data Hiding is an important issue for information security.There has been number of steganographic embedding techniques proposed over last few years. This paper presents a novel steganographic method based on the JPEG quantization table modification. Instead of dividing cover image into 8¡Á8 blocks, the cover image is divided into nonoverlapping blocks of 16¡Á16 pixels to embed secret information. Here we have considered color images and investigated the feasibility of data hiding. Four performance parameters namely Capacity, MSE and PSNR and NC have been compared on different sizes of standard test images. In comparison with Jpeg-Jsteg and Chang et al. methods based on the conventional blocks of 8 x8 pixels the proposed method shows high performance with regard to embedd ing rate and PSNR of stego image. Furthermore, NC shows that the produced stego-images are almost similar to the original cover images.
关键词：Capacity; DCT; JPEG; PSNR; ; Steganography