The blind detection for palette image watermarking without changing the color
This addresses steganography for palette images, enabling covert data hiding while preserving visual appearance, though it appears incremental as it builds on existing permutation-based methods.
The paper tackles the problem of embedding a binary pattern into palette images without altering their colors, achieving blind detection where hidden data can be extracted without needing the original cover image.
To hide a binary pattern in the palette image a steganographic scheme with blind detection is considered. The embedding algorithm uses the Lehmer code by palette color permutations for which the cover image palette is generally required. The found transformation between the palette and RGB images allows to extract the hidden data without any cover work.