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DCT-Based Compressed Image with Reversibility Using Modified Quantization

  • Chi-Yao Weng
  • Cheng-Ta HuangEmail author
  • Hung-Wei Kao
Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 81)

Abstract

This paper presents a lossless data hiding scheme for concealing message in each block of discrete cosine transform (DCT) coefficients. Our proposed improves the Chang et al.’s scheme for obtaining higher performance in terms of embedding capacity and image quality. In our scheme, two neighbor coefficients which are near to zero as an group are selected in each block, and then, hiding the message into each group. The coefficient is modified by one unit; therefore, the stego-image can keep the high image quality. Experimental results show that the proposed scheme not only provides better performance than that of previous works but also achieves coefficients reversibility.

Keywords

Lossless data hiding Discrete Cosine Transform (DCT) Coefficient modification Reversibility 

Notes

Acknowledgment

This work was supported in part by Ministry of Science of Technology, Taiwan, Under Contract MOST 105-2221-E-153-010.

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Department of Computer ScienceNational Pingtung UniversityPingtungTaiwan
  2. 2.Department of Information ManagementOriental Institute of TechnologyNew Taipei CityTaiwan

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