Optoelectronics Letters

, Volume 2, Issue 3, pp 217–220 | Cite as

Robust color image hiding method in DCT domain

  • Qing-zhong Li
  • Chen Yu
  • Dong-sheng Chu
Image and Information Processing


This paper presents a robust color image hiding method based on YCbCr color system in discrete cosine transform (DCT) domain, which can hide a secret color image behind a public color cover image and is compatible with the international image compression standard of JPEG. To overcome the grave distortion problem in the restored secret image, this paper proposes a new embedding scheme consisting of reasonable partition of a pixel value and sign embedding. Moreover, based on human visual system (HVS) and fuzzy theory, this paper also presents a fuzzy classification method for DCT sub-blocks to realize the adaptive selection of embedding strength. The experimental results show that the maximum distortion error in pixel value for the extracted secret image is ± 1. And the color cover image can provide good quality after embedding large amount of data.

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  1. [1]
    CHENG Wei-dong and LIU Hong-mei,Journal of Zhongshan University,40 (2001), 47. (in Chinese)Google Scholar
  2. [2]
    SUN Rui, SUN Hong, and Yao Tian-ren,Journal of Data Acquisition & Processing,17 (2002), 283. (in Chinese)Google Scholar
  3. [3]
    ZHAO Hong-yi,Journal of Optoelectronics · Laser,14 (2003), 178. (in Chinese)Google Scholar
  4. [4]
    LI Xia, TAN Yun-meng, and YAO Lu,Computer Engineering and Applications,29 (2003), 164. (in Chinese)Google Scholar
  5. [5]
    Rajendra Acharya U. and U. C. Niranjan,Computer Methods and Programs in Biomedicine,76 (2004), 13.CrossRefGoogle Scholar
  6. [6]
    CHEN Jing-yuan and TAO Liang,Journal of Optoelectronics · Laser,16 (2005), 1363. (in Chinese)Google Scholar
  7. [7]
    C. I. Podilchuk and Wenjun Zeng,IEEE Journals on Selected Area in Communications: Special issue on Copyright and Privacy Protection,16 (1998), 525.Google Scholar

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© Tianjin University of Technology 2006

Authors and Affiliations

  • Qing-zhong Li
    • 1
  • Chen Yu
    • 1
  • Dong-sheng Chu
    • 1
  1. 1.Engineering CollegeOcean University of ChinaQingdao

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