Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Metelev, I. K."'
Digital array orthogonal transformations that can be presented as a decomposition over basis items or basis images are considered. The orthogonal transform provides digital data scattering, a process of pixel energy redistributing, that is illustrate
Externí odkaz:
http://arxiv.org/abs/1901.07840
Digital images can be copied without authorization and have to be protected. Two schemes for watermarking images in PDF document were considered. Both schemes include a converter to extract images from PDF pages and return the protected images back.
Externí odkaz:
http://arxiv.org/abs/1707.01513
To hide a binary pattern in the palette image a steganographic scheme with blind detection is considered. The embedding algorithm uses the Lehmer code by palette color permutations for which the cover image palette is generally required. The found tr
Externí odkaz:
http://arxiv.org/abs/1503.04958
The Color to Gray and Back transformation watermarking with a secrete key is considered. Color is embedded into the bit planes of the luminosity component of the YUV color space with the help of a block algorithm that allows using not only the least
Externí odkaz:
http://arxiv.org/abs/1404.1313