Color to Gray and Back transformation for distributing color digital images
arXiv:1404.1313
Abstract
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 significant bits. An application of the problem of distributing color digital images from a data base among legitimate users is discussed. The proposed protocol can protect original images from unauthorized copying.
5 pages, 3 figures, submitted to The International Conference on Computer Graphics and Vision, GraphiCon'2013