Locally optimum image watermark decoder by modeling NSCT domain difference coefficients with vector based Cauchy distribution.
Xiang-Yang WangSi-yu ZhangLi WangHong-Ying YangPan-Pan NiuPublished in: J. Vis. Commun. Image Represent. (2019)
Keyphrases
- input image
- discrete wavelet transformation
- image processing operations
- image representation
- pixel values
- geometric distortions
- digital watermark
- linear relationship
- multiscale
- infrared images
- decoding process
- image blocks
- high resolution
- watermarking technique
- watermark embedding
- gray level
- filter coefficients
- image watermarking
- heavy tailed
- fused image
- image authentication
- test images
- infrared
- digital images
- successive approximation