Patent ID: 6044182
Filing Date: 2000-03-28
Classification: G06T,H04N

Abstract:
A method of embedding digital data in a source image, comprising the steps of:(a) generating a multi-level data image representing the digital data;(b) generating an encoding carrier image f(x,y) having spatially dispersing properties defined by its Fourier transform F(u,v) whereinF(u,v)=.vertline.F(u,v).vertline.e.sup.i.phi.(u,v) with phase response .phi.(u,v).noteq.0;(c) convolving the multi-level data image with the encoding carrier image to produce a spatially dispersed data image altered by the phase response; and(d) adding the spatially dispersed data image to the source image to produce a source image containing embedded data.