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When used today, the units are often rounded to the nearest square meter. Thus, jutro is rounded to 5,755 square meters [ 1 ] and lanac is rounded to 7,192 square meters. [ 1 ] When more precision is needed, katastarsko jutro (meaning cadastral jutro) is used, that equals exactly 0.5754642 hectares [ 1 ] (5,754.642 square meters).
Chart showing a conventional SDR gamma curve and the hybrid log–gamma curve. HLG uses a logarithmic curve for the upper half of the signal values, which allows for a larger dynamic range. HLG is an HDR format that uses the HLG transfer function, BT.2020 color primaries and a bitdepth of 10-bit. [8] HLG was designed to be backward compatible ...
HLG is supported in Rec. 2100 with a nominal peak luminance of 1,000 cd/m 2 and a system gamma value that can be adjusted depending on background luminance. [3] For a reference viewing environment the peak luminance of display should be 1000 cd/m 2 or more for small area highlights and the black level should be 0.005 cd/m 2 or less. [ 3 ]
It was developed by Dolby [6] and standardized in 2014 by SMPTE [1] and also in 2016 by ITU in Rec. 2100. [ 7 ] [ 8 ] ITU specifies the use of PQ or HLG as transfer functions for HDR-TV. [ 7 ] PQ is the basis of HDR video formats (such as Dolby Vision , [ 2 ] [ 9 ] HDR10 [ 10 ] and HDR10+ [ 11 ] ) and is also used for HDR still picture formats.
HLG is a transfer function developed by the NHK and BBC. [82] It is backward compatible with SDR's gamma curve, and is the basis of an HDR format known as HLG. [28] The HLG transfer function is also used by other video formats such Dolby Vision profile 8.4 and for HDR still picture formats. [45] [83] [84] HLG is royalty-free. [85]
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Although the concept of U-value (or U-factor) is universal, U-values can be expressed in different units. In most countries, U-value is expressed in SI units, as watts per square metre-kelvin: W/(m 2 ⋅K) In the United States, U-value is expressed as British thermal units (Btu) per hour-square feet-degrees Fahrenheit: Btu/(h⋅ft 2 ⋅°F)
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