A New Watermarking System Based on Discrete Cosine Transform (DCT) in Color Biometric Images.
Sengül DoganTürker TuncerEngin AvciArif GultenPublished in: J. Medical Syst. (2012)
Keyphrases
- discrete cosine transform
- jpeg images
- image blocks
- color components
- dct coefficients
- image compression
- block dct
- discrete fourier transform
- dc coefficients
- transform domain
- filter bank
- image data
- dct domain
- lapped transforms
- blocking artifacts
- compressed images
- projection onto convex sets
- pixel values
- coded images
- lossy compression
- test images
- image coding
- signal processing
- digital images
- low bit rate
- data hiding
- watermark detection
- color images