A new technique for embedding visible watermarks into a digital image is described in this paper, which uses statistical properties of each pixel and its immedi
This paper deals with Hilbert's 16th problem and its generalizations. The configurations of all closed branches of an algebraic curve of degree n are discus
In this paper we propse a semi-fragile watermarking scheme,which can be used for image authentication.Let the original image be performed by l-level discrete wa