نتایج جستجو برای: log

تعداد نتایج: 79620  

Journal: :Physical Review D 2011

Journal: :Physical Review D 2011

Journal: :Annales de l’institut Fourier 2001

Journal: :Communications for Statistical Applications and Methods 2003

1999
Shelby Pereira Joseph Ó Ruanaidh Frédéric Deguillaume Gabriela Csurka Thierry Pun

Digital watermarks have been proposed as a method for discouraging illicit copying and distribution of copyrighted material. This paper describes a method for the secure and robust copyright protection of digital images. We present an approach for embedding a digital watermark into an image using the fast Fourier transform. To this watermark is added a template in the Fourier transform domain t...

Journal: :Symposium - International Astronomical Union 1989

Journal: :Monthly Notices of the Royal Astronomical Society 1963

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