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  2. Contrast (vision) - Wikipedia

    en.wikipedia.org/wiki/Contrast_(vision)

    In images where the contrast ratio approaches the maximum possible for the medium, there is a conservation of contrast. In such cases, increasing contrast in certain parts of the image will necessarily result in a decrease in contrast elsewhere. Brightening an image increases contrast in darker areas but decreases it in brighter areas ...

  3. Contrast ratio - Wikipedia

    en.wikipedia.org/wiki/Contrast_ratio

    An LCD technology is dynamic contrast (DC), also called advanced contrast ratio (ACR), and smart contrast ratio (SCR [4]) and various other designations.When there is a need to display a dark image, a display that supports dynamic contrast underpowers the backlight lamp (or decreases the aperture of the projector's lens using an iris), but proportionately amplifies the transmission through the ...

  4. Contrast-to-noise ratio - Wikipedia

    en.wikipedia.org/wiki/Contrast-to-noise_ratio

    Contrast-to-noise ratio ( CNR) [ 1] is a measure used to determine image quality. CNR is similar to the metric signal-to-noise ratio (SNR), but subtracts a term before taking the ratio. This is important when there is a significant bias in an image, such as from haze. [ 2] As can be seen in the picture at right, the intensity is rather high ...

  5. Gamma correction - Wikipedia

    en.wikipedia.org/wiki/Gamma_correction

    Gamma correction is a type of power law function whose exponent is the Greek letter gamma ( γ ). It should not be confused with the mathematical Gamma function. The lower case gamma, γ, is a parameter of the former; the upper case letter, Γ, is the name of (and symbol used for) the latter (as in Γ ( x )).

  6. The Carl Zeiss 2,500,000:1 Contrast Ratio ... - TechCrunch

    techcrunch.com/2008/09/26/the-carl-zeiss...

    So you think that those 30,000:1 contrast ratio projectors announced at CEDIA ’08 were impressive; this Carl Zeiss planetarium projector puts ’em to shame. The powerdomeVELVET employs a 4k DLP ...

  7. Signal-to-noise ratio (imaging) - Wikipedia

    en.wikipedia.org/wiki/Signal-to-noise_ratio...

    Signal-to-noise ratio ( SNR) is used in imaging to characterize image quality. The sensitivity of a (digital or film) imaging system is typically described in the terms of the signal level that yields a threshold level of SNR. Industry standards define sensitivity in terms of the ISO film speed equivalent, using SNR thresholds (at average scene ...

  8. Toshiba demos 55-inch SED with 100,000:1 contrast ratio

    www.engadget.com/2006-10-19-toshiba-demos-55...

    This week SED inc, the joint effort between Canon and Toshiba, demoed the first SED with a 100,000:1 contrast ratio at the FPD International 2006 in Pacifico Yokohama convention center; previous ...

  9. Display contrast - Wikipedia

    en.wikipedia.org/wiki/Display_contrast

    This ratio, often called contrast ratio, CR, (actually being a luminance ratio), is often used for high luminances and for specification of the contrast of electronic visual display devices. The luminance contrast (ratio), CR, is a dimensionless number , often indicated by adding ":1" to the value of the quotient (e.g. CR = 900:1).

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