Reversible hiding in DCT-based compressed images

  • Authors:

  • Chin-Chen Chang;Chia-Chen Lin;Chun-Sen Tseng;Wei-Liang Tai

  • Affiliations:

  • Department of Information Engineering and Computer Science, Feng Chia University, Taichung 40724, Taiwan, ROC and Department of Computer Science and Information Engineering, National Chung Cheng U ...;Department of Computer Science and Information Management, Providence University, Taichung 433, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi 621, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi 621, Taiwan, ROC

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2007

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Abstract

This paper presents a lossless and reversible steganography scheme for hiding secret data in each block of quantized discrete cosine transformation (DCT) coefficients in JPEG images. In this scheme, the two successive zero coefficients of the medium-frequency components in each block are used to hide the secret data. Furthermore, the scheme modifies the quantization table to maintain the quality of the stego-image. Experimental results also confirm that the proposed scheme can provide expected acceptable image quality of stego-images and successfully achieve reversibility.