Undetectable steganographic method for palette-based images

Han Yan Wu*, Ling Hwei Chen, Yu Tai Ching

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Steganography is a technique applied to ensure secure communication. It is challenged by visual observation or statistical analysis to ascertain whether a message is hidden within a cover medium. Several steganographic methods have been proposed for palette-based images. These methods maintain image quality but cannot resist some statistical and visual attacks. To overcome this problem, two parity assignments with performances similar to those of existing parity assignments are proposed. An innovative embedding process that randomly selects one parity assignment while embedding secret bits in each pixel is provided. Finally, a steganographic method using the proposed embedding process and a specified adaptive scheme is presented. Experimental results revealed that the proposed method is undetectable under some statistical and visual attacks even as it maintains image quality.

Original languageEnglish
Article number063007
JournalJournal of Electronic Imaging
Issue number6
StatePublished - 1 Nov 2020


  • data hiding
  • palette-based images
  • parity assignment
  • steganalysis
  • steganography
  • undetectable

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