Covariance Based Steganography Using DCT.
N. SathishaK. Suresh BabuK. B. RajaK. R. VenugopalLalit M. PatnaikPublished in: ACC (2) (2011)
Keyphrases
- jpeg images
- discrete cosine transform
- spatial domain
- dct coefficients
- quantization table
- information hiding
- transform domain
- spread spectrum
- dct domain
- discrete cosine transformation
- compressed images
- image compression
- step size
- compression algorithm
- frequency domain
- covariance matrix
- data hiding
- pairwise
- multivariate gaussian distribution
- hidden information
- data embedding
- cover image
- secret message
- secret information
- reed solomon codes
- digital watermark
- high capacity
- secret data
- information security
- covariance matrices
- image blocks
- compressed domain