Fragile image watermarking using a gradient image for improved localization and security.
Shan SuthaharanPublished in: Pattern Recognit. Lett. (2004)
Keyphrases
- image watermarking
- geometric distortions
- edge detection
- image data
- input image
- additive noise
- image segmentation
- spread spectrum
- multiscale
- test images
- watermarking technique
- image regions
- jpeg compression
- geometric attacks
- natural images
- gray level images
- low frequency
- pixel values
- digital images
- digital watermark
- high resolution