Data Hiding in 2-Color Images

  • Authors:
  • Yu-Chee Tseng;Hsiang-Kuang Pan

  • Affiliations:
  • -;-

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 2002

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Abstract

In an earlier paper, we proposed a steganography scheme for hiding a piece of critical information in a host binary image. That scheme ensures that, in each m \times n image block of the host image, as many as \lfloor \log_2 (mn+ 1) \rfloor bits can be hidden in the block by changing at most 2 bits in the block. In this paper, we propose a new scheme that improves in its capability to maintain higher quality of the host image after data hiding by sacrificing some data hiding space. The new scheme can still offer a good data hiding ratio. It ensures that, for any bit that is modified in the host image, the bit is adjacent to another bit which has a value equal to the former's new value. Thus, the hiding effect is quite invisible.