Listar División de Nanociencias y Materiales por autor "Vargas Olmos, Cecilia"

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    • Perceptual security of encrypted images based on wavelet scaling analysis 

      Vargas Olmos, Cecilia; Murguía, José; Ramírez Torres, Marco Tulio; Mejía Carlos, Marcela; Rosu Barbus, Haret-Codratian (2016)
      "The scaling behavior of the pixel fluctuations of encrypted images is evaluated by using the detrended fluctuation analysis based on wavelets, a modern technique that has been successfully used recently for a wide range ...

    • Two-dimensional DFA scaling analysis applied to encrypted images 

      Vargas Olmos, Cecilia; Murguía, José; Ramírez Torres, Marco Tulio; Mejía Carlos, Marcela; Rosu Barbus, Haret-Codratian; González-Aguilar, Hernán (2015)
      "The technique of detrended fluctuation analysis (DFA) has been widely used to unveil scaling properties of many different signals. In this paper, we determine scaling properties in the encrypted images by means of a ...

    • Wavelet characterization of hyper-chaotic time series 

      Murguía, José; Rosu Barbus, Haret-Codratian; Reyes López, Luis Eduardo; Mejía Carlos, Marcela; Vargas Olmos, Cecilia (Sociedad Mexicana de Física, A.C., 2018)
      A wavelet scaling numerical characterization of time series based on the variance of the wavelet coefficients is used for three well-known four-dimensional and one five-dimensional hyper-chaotic systems. We report several ...

    • Wavelet multifractal detrended fluctuation analysis of encryption and decryption matrices 

      Murguía, José; Mejía Carlos, Marcela; Vargas Olmos, Cecilia; Ramírez Torres, Marco Tulio; Rosu Barbus, Haret-Codratian (2013)
      "In this paper, we study in detail the multifractal features of the main matrices of an encryption system based on a rule-90 cellular automaton. For this purpose we consider the scaling method known as the wavelet transform ...