J. Xu, A.H. Sung, P. Shi, and Q. Liu (USA)
Wavelet, ASCII, Steganography, Capacity, Robustness
Digital steganography has become increasingly used in recent years. In this paper we propose an algorithm to limit errors in lossy transforms to achieve high capacity text hiding in image files using discrete Haar wavelet transform (DHWT). We also discuss robust text steganography using multiple-level lossless DHWT. Experimental results validate our method for high capacity plain text hiding and demonstrate that lossless recovery of the hidden text from JPEG images with compression rate as high as 67% is possible.
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