A Grayscale Image Steganography Based upon Discrete Cosine Transformation.
Chin-Chen ChangPei-Yu LinJun-Chou ChuangPublished in: J. Digit. Inf. Manag. (2010)
Keyphrases
- gray scale
- discrete cosine transformation
- spatial domain
- image compression
- dct coefficients
- image authentication
- gray scale images
- digital watermark
- adaptive quantization
- color images
- binary images
- low bit rate
- grayscale images
- frequency domain
- transform domain
- gray level
- error diffusion
- discrete cosine transform
- bit rate
- multiscale
- color information
- motion estimation
- watermarking algorithm
- image processing
- compression ratio
- compression algorithm
- visual quality
- rate distortion
- inverse halftoning