Brightness Contrast And Sharpness, Interactive Factors In Perceptual Image Quality

Jacques A.J. Roufs

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    17 Citations (Scopus)


    Brightness contrast is an important factor in perceptual image quality. In the case of a TV system it is dominantly determined by the luminance reproduction function. Subjective quality was found to be optimal for non-linear luminance transfer and closely related to (subjective) brightness contrast. Quality is also related to sharpness, which in turn depends on the non-linear transfer. Fortunately, in the neighbourhood of the optimum, quality is dominantly determined by brightness contrast. It will be shown that brightness contrast is not adequately characterized by the luminance contrast ratio, which is defined as the ratio of the luminance extremes. Alternative and more suitable contrast measures in terms of luminance are discussed.
    Original languageEnglish
    Title of host publicationHuman vision, visual processing, and digital dsisplay
    Publication statusPublished - 1989
    EventHuman vision, visual processing, and digital dsisplay - Los Angeles, United States
    Duration: 18 Jan 198920 Jan 1989

    Publication series

    NameProceedings of SPIE
    ISSN (Print)0277-786X


    ConferenceHuman vision, visual processing, and digital dsisplay
    Country/TerritoryUnited States
    CityLos Angeles

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