Color image watermarking scheme based on quaternion Hadamard transform and Schur decomposition.
Jianzhong LiChuying YuBrij B. GuptaXuechang RenPublished in: Multim. Tools Appl. (2018)
Keyphrases
- watermarking scheme
- hadamard transform
- color images
- transform domain
- spread spectrum
- digital watermarking
- estimation algorithm
- copyright protection
- gray scale
- error correction
- image watermarking scheme
- watermarking algorithm
- jpeg compression
- spatial domain
- reversible watermarking
- elimination algorithm
- watermarking technique
- image processing
- watermark embedding
- macroblock
- image segmentation