HP DreamColor Z31x User Guide - Page 73
White point, Gamma/EOTF, Luminance
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White point This menu provides the following standard white points: ● D65: The standard white point for most video productions as well as most computer graphics and design work. It can also be used for film production. ● D50: The standard white point for soft proofing and print production. It is warmer than the D65 white point. ● D55: The traditional white point for film projection. It is the white point of the light output of a film projector's lamp house. ● DCI-P3: The standard white point for a digital cinema projector. Gamma/EOTF This menu provides the following options: ● 2.2: A power function 2.2 gamma considered the standard gamma for use in daylight-level environment illumination ● 2.4: A power function 2.4 gamma that was formerly the standard gamma for dim lighting environments. For video work this gamma function has been superseded by the BT.1886 EOTF (electro-optical transfer function) ● 2.6: A power function 2.6 gamma that is the standard gamma for cinema lighting environments with essentially no ambient illumination ● BT.1886: An EOTF that has been defined by the International Telecommunication Union (ITU) as the standard EOTF for professional high-definition video production and finishing ● sRGB: An EOTF based on the power function 2.2 gamma but designed to provide better lower-black representation by transitioning from a curve to a linear function for the lowest grayscale values ● EPD: An EOTF specified in the Society for Information Display Information Display Measurement Standard document with a grayscale function designed for viewing satellite imagery and intended to make dimmer low-contrast objects of interest more easily readable when residing near brighter areas in the image Luminance This menu provides the following luminance values as well as the option to select any luminance value between 48 and 250 candelas per square meter (cd/m²): ● 250 cd/m²: The maximum luminance that can be calibrated to in the display ● 100 cd/m²: The standard luminance, originally defined by SMPTE, for video online and finishing work ● 120 and 80 cd/m²: Two options that provide bracketed values around 100 cd/m², based on the typical environment illumination in VFX studios ● 48 cd/m²: The standard front-of-screen illuminance for motion picture presentation, equivalent to 17 fl (footlamberts) After you have defined the calibration and confirmed the chosen values, calibration begins. The calibration will take approximately 3½ minutes when using the internal instrument. Calibration time may be longer with some external instruments. Do not turn the display off during the calibration process. The preset is given a name based on the calibration targets selected. Menu-driven user calibration 63