Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Huffman coding

Information Hiding Based on Discrete Time Wavelet Transform and Huffman Coding

Ammar Abdul-Amer Rashed

Engineering and Technology Journal, 2011, Volume 29, Issue 2, Pages 295-304

The approach of This paper presentation a companied technique for hiding
secret messages (text) based on wavelet transform applying in cover image (a gray
level image 8bit) then Huffman encoding is also executed on the secret
messages,to increase the robustness of hiding system by inserting the embedded
secret messages in the low frequency components of the cover image after
applying wavelet transform followed by a sorting process and the coefficients of
secret messages after applying Huffman encoding and using binary to multilevel
to reading the string of message reducing by multiplying in attenuation factor
before adding them with those of the cover image.
The experimental results show that the algorithm has a high capacity and a good
invisibility, Moreover PSNR of stego image shows the better results the PSNR
above 40 dB, the proposal system was activated according to attacker noise is
addition and JPEG compression application are used with out detection the secret