Journal of Guangxi Normal University(Natural Science Edition) ›› 2012, Vol. 30 ›› Issue (3): 119-124.

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Information Hiding Algorithm for JPEG Images Based on Block

ZHANG Xian-quan1,2, WANG Xian-hui1, WANG Xiao-yun3, YUChun-qiang1   

  1. 1.College of Computer Science and Information Technology,Guangxi Normal University,Guilin Guangxi 541004, China;
    2.Network Center,Guangxi Normal University,Guilin Guangxi 541004,China;
    3.College of Mathematics and Computer Science,Yangtze Normal University,Chongqing 408100,China
  • Received:2012-05-22 Online:2012-09-20 Published:2018-12-04

Abstract: The cover image is firstly divided into non-overlapping blocks,whichare then classified into different categories according to quantized DCT coefficients of each block and the characteristics of Human Visual System.Different methods are adopted to hide the secret data in AC coefficients for different typesof blocks in order to reduce the influence on the cover image.The types of imageblock remain unchanged after secret is hidden in these blocks,thereby the secretdata can be extracted exactly.Experimental results show that the proposed algorithm can not only maintain visual quality of JPEG image but also achieve high capacity.

Key words: information hiding, JPEG, DCT coefficients, block

CLC Number: 

  • TN919.81
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