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Loss of Spectral Information in the Colour Signals Filtered by the Human Visual System

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Different authors have studied the response of the human visual system (HVS) in the chromatic frequency domain and have obtained its spectral modulation sensitivity function (SMSF), either computationally or experimentally. The Fourier analysis applied to the colour signals (product of the spectral power distribution of the illuminant and the reflectance or transmittance function of an object) carries out the chromatic frequency domain. The SMSF defined in this domain is analogous to the CSF or the TMTF, which are defined in the spatial and temporal domains, respectively. We have studied how HVS processes chromatic information of daylight and natural objects. The analysis of the original and filtered colour signal with different cut-off frequencies reveals some degree of degradation of these colour signals. This is particularly important when the colour signal are characterised by peaked spectral power distributions.
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Document Type: Research Article

Publication date: January 1, 2002

More about this publication?
  • Started in 2002 and merged with the Color and Imaging Conference (CIC) in 2014, CGIV covered a wide range of topics related to colour and visual information, including color science, computational color, color in computer graphics, color reproduction, volor vision/psychophysics, color image quality, color image processing, and multispectral color science. Drawing papers from researchers, scientists, and engineers worldwide, DGIV offered attendees a unique experience to share with colleagues in industry and academic, and on national and international standards committees. Held every year in Europe, DGIV papers were more academic in their focus and had high student participation rates.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual papers for details.

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