Adaptive PVD Steganography Using Horizontal, Vertical, and Diagonal Edges in Six-Pixel Blocks.
Anita PradhanKolla Raja SekharGandharba SwainPublished in: Secur. Commun. Networks (2017)
Keyphrases
- vertical lines
- edge map
- weighted median filter
- gradient magnitude
- switching median filter
- detected edges
- image blocks
- intensity variations
- input image
- canny edge
- neighboring pixels
- edge pixels
- jpeg images
- block boundaries
- directed graph
- covariance matrix
- multiscale
- edge direction
- block size
- image pixels
- denoising
- digital images