Browsing by Autor "Alfredo Restrepo Palacios"

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    La teoría de color de Hering: una posibilidad en procesamiento de imágenes y visión artificial
    (1998) César Julio Bustacara Medina; Alfredo Restrepo Palacios
    The basic idea behind Hering 's color theory is that the color information can be transmited and coded using three channels, and the information on each channel is not just the value perceived by the retina photoreceptors, as expressed by Young- Helmholt; [3j, but it is the sum or dijference of the color information derived from the photoreceptors.
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    Tetrachromatic Metamerism - A Discrete, Mathematical Characterization
    (2014) Alfredo Restrepo Palacios
    Two light beams that are seen as of having the same colour but that have different spectra are said to be metameric. The colour of a light beam is based on the reading of severel photodetectors with different spectral responses and metamerism results when a set of photodetectors is unable to resolve two spectra. The spectra are then said to be metameric. We are interested in exploring the concept of metamerism in the tetrachromatic case. Applications are in computer vision, computational photography and satellite imaginery, for example.