A secure gray-scale image watermarking technique in fractional DCT domain using zig-zag scrambling.
Varsha SisaudiaVirendra P. VishwakarmaPublished in: J. Inf. Secur. Appl. (2022)
Keyphrases
- gray scale
- watermarking technique
- watermark detection
- dct domain
- compressed domain
- binary images
- image blocks
- quantization step
- digital images
- watermarking scheme
- image data
- post processing
- gray level
- color images
- input image
- image watermarking
- data hiding
- digital watermarking
- watermarking algorithm
- multiscale
- dct coefficients
- spatial domain
- error diffusion
- copyright protection
- watermarked image
- image segmentation
- discrete cosine transform
- low frequency
- human visual system
- visual information
- high resolution
- computer vision
- reference frame
- inter frame
- compressed images
- test images
- high frequency
- natural images
- spread spectrum