文章基本信息

标题：Implementation of Modified 16Ã—16 Quantization Table Steganography on Colour Images
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作者：Neha Batra ; Pooja Kaushik
期刊名称：International Journal of Advanced Research In Computer Science and Software Engineering
印刷版ISSN：2277-6451
电子版ISSN：2277-128X
出版年度：2012
卷号：2
期号：10
出版社：S.S. Mishra
摘要：Steganography is the art of concealing information in ways that prevent the detection of hidden messages. Steganography includes an array of secret communication methods that hide the message from being seen or discovered. The 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 colour images and investigated the feasibility of data hiding. Three performance parameters namely Capacity, MSE and PSNR 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 8x8 pixels the proposed method shows high performance with regard to embedding rate and PSNR of stego image.Furthermore, the produced stego-images are almost identical to the original cover images.
关键词：Steganography; PSNR; Capacity; JPEG; DCT