2026-04-14T03:33:19Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1038662026-01-21T08:14:34Zcom_2072_1033col_2072_452950

Data hidding in color images using perceptual models Vidal Manzano, José Sayrol Clols, Elisa Madueño Ruíz, María Isabel Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions Universitat Politècnica de Catalunya. GPI - Grup de Processament d'Imatge i Vídeo Àrees temàtiques de la UPC::Enginyeria de la telecomunicació Telecommunication Watermarking CIE-lab models Direct sequence spread spectrum Telecomunicació One of the problems arising from the use of digital media is the ease of identical copies of digital images or audio files, allowing manipulation and unauthorized use. Copyright is an effective tool for preserving intellectual property of those documents but authors and publishers need effective techniques that prevent from copyright modification, due to the straightforward access to multimedia applications and the wider use of digital publications through the www. These techniques are generally called watermarking and allow the introduction of side information (i.e. author identification, copyrights, dates, etc.). This work concentrates on the problem embedding and optimum blind detection of data in color images through the use of spread spectrum techniques, both in space (Direct Sequence Spread Spectrum or DSSS) and frequency (Frequency Hopping). It is applied to RGB and opponent color component representations. Perceptive information is considered in both color systems. Some tests are performed in order to ensure imperceptibility and to assess detection quality of the optimum color detectors. Peer Reviewed Postprint (published version) 2000 Conference report Vidal, J., Sayrol, E., Madueño, M. Data hidding in color images using perceptual models. A: COST 254 Intelligent Processing and Facilities for Communications Terminals. "COST 254 Intelligent Processing and Facilities for Communications Terminals". Bordeaux: Christian Germain, Eric Grivel, Olivier Lavialle, 2000, p. 21-25. https://hdl.handle.net/2117/103866 eng http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Attribution-NonCommercial-NoDerivs 3.0 Spain 5 p. application/pdf Christian Germain, Eric Grivel, Olivier Lavialle