US Patent 7826638 Methods and apparatus for lossless data hiding
Patent 7826638 was granted and assigned to New Jersey Institute of Technology on November, 2010 by the United States Patent and Trademark Office.
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Methods and apparatus are provided for subjecting an original, pixel domain image to an Integer Wavelet Transform (IWT) to obtain a matrix of wavelet coefficients; selecting at least one bit plane between a least significant bit plane and a most significant bit plane of the matrix of wavelet coefficients; compressing the at least one selected bit plane to produce free space in the at least one selected bit plane; embedding hidden data in the free space of the at least one compressed bit plane; and subjecting the at least one embedded bit plane to an Inverse IWT to produce a marked pixel domain image. Methods and apparatus are also provided for reversing this process.
US Patent 07826638 Methods and apparatus for lossless data hiding US Patent 7826638 Methods and apparatus for lossless data hiding
US Patent 07826638 Methods and apparatus for lossless data hiding
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