Title :
Information theoretic bounds for data hiding in compressed images
Author :
Ramkumar, Mahalingam ; Akansu, Ali N.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
We present an information-theoretic approach to obtain an estimate of the number of bits that can be hidden in still images, or, the capacity of the data-hiding channel. We show how addition of the message signal in a suitable transform domain rather than the spatial domain can significantly increase the channel capacity. We compare the capacities achievable with different decompositions like DCT, DFT, Hadamard, and subband transforms
Keywords :
Hadamard transforms; channel capacity; copyright; data compression; data encapsulation; discrete Fourier transforms; discrete cosine transforms; image coding; transform coding; DCT; DFT; Hadamard transform; compressed images; copyright protection; data hiding; data-hiding channel capacity; information theoretic bounds; message signal; spatial domain; still images; subband transform; transform domain; Access control; Additive noise; Copyright protection; Data encapsulation; Discrete cosine transforms; Gaussian noise; Image coding; PSNR; Steganography; Watermarking;
Conference_Titel :
Multimedia Signal Processing, 1998 IEEE Second Workshop on
Conference_Location :
Redondo Beach, CA
Print_ISBN :
0-7803-4919-9
DOI :
10.1109/MMSP.1998.738945
