Enhancement of Image Quality in Screen Mark Attack of Watermark.
Ki Hyun KimJong Wook HanYong Man RoPublished in: SIP (2003)
Keyphrases
- image quality
- digital watermark
- image fidelity
- human visual system
- lossy compression
- image contrast
- visual quality
- image data
- digital images
- bit rate
- image enhancement
- digital watermarking
- high quality
- watermarking scheme
- image watermarking
- copyright protection
- quality assessment
- compression ratio
- watermarking algorithm
- reconstructed image
- halftoning algorithm
- image processing
- perceptual quality
- pixel values
- watermark embedding
- spread spectrum
- direct binary search
- inverse halftoning
- image quality assessment
- jpeg compression
- secret key
- quality metrics
- spatial domain
- geometric distortions
- image processing operations
- image blocks
- standard test images