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Vidal J, Sayrol E, Maribel M. Data Hidding in Color Images using Perceptual Models. In COST 254 Intelligent Processing and Facilities for Communications Terminals. 2000. pp. 21–25.
Gasull A, Marqués F, Sallent S, Torres L, Vidal J. Detección automática de contornos en imágenes ecográficas. In III Simposium Nacional de Reconocimiento de Formas y Análisis de Imágenes. 1988. pp. 1–4.
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Vidal J, Sayrol E, Cabanillas S, Santamaría S. Non-Noticeable Information Embedding in Color Images : Marking and Detection. In 33rd ANNUAL - 1999 International Carnahan Conference on Security Technology. 1999. pp. 293–297.
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Vidal J, Sayrol E. Optimum Watermark Detection and Embedding in Digital Images. In 1998 IEEE Second Workshop on Multimedia Signal Processing. 1998. pp. 285–290.
Sayrol E, Vidal J, Cabanillas S, Santamaría S. Optimum Watermark Detection in Color Images. In 1999 IEEE International Conference on Image Processing. 1999. pp. 1–5.
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Ventosa S, Sayrol E, Vidal J. Perceptual mask estimation from watermarked images. In SPIE Electronic Imaging 2003. 2003. pp. 10–17.