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Hurter and Driffield curve

См. также в других словарях:

  • h and d curve — |āchənˈdē noun Usage: usually capitalized H&D Etymology: after Ferdinand Hurter and Charles Driffield fl 1890 British photographers : characteristic curve a * * * Photog. See characteristic curve. [after Ferdin …   Useful english dictionary

  • H and D curve — noun see characteristic curve * * * Photog. See characteristic curve. [after Ferdinand Hurter (1844 98), Swiss chemist, and Vero Charles Driffield (1848 1915), English chemist, who jointly descibed it in 1890] …   Useful english dictionary

  • H and D curve — Photog. See characteristic curve. [after Ferdinand Hurter (1844 98), Swiss chemist, and Vero Charles Driffield (1848 1915), English chemist, who jointly descibed it in 1890] * * * …   Universalium

  • Curve (tonality) — Photo and curve dialog in the GIMP Photo and curve …   Wikipedia

  • h and d system — noun Usage: usually capitalized H&D Etymology: after Ferdinand Hurter and Charles Driffield fl 1890 : a system for determining the speed of photographic materials that is based on the characteristic curve and related to the inertia of the… …   Useful english dictionary

  • Reciprocity (photography) — In photography and holography, reciprocity refers to the inverse relationship between the intensity and duration of light that determines exposure of light sensitive material. Within a normal exposure range for film stock, for example, the… …   Wikipedia

  • Film speed — is the measure of a photographic film s sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. A closely related ISO system is used to measure the sensitivity of digital… …   Wikipedia

  • Sensitometry — is the scientific study of light sensitive materials, especially photographic film. The study has its origins in the work by Ferdinand Hurter and Vero Charles Driffield (circa 1876) with early black and white emulsions. [Hurter, Ferdinand… …   Wikipedia

  • Gamma correction — Gamma correction, gamma nonlinearity, gamma encoding, or often simply gamma, is the name of a nonlinear operation used to code and decode luminance or tristimulus values in video or still image systems. [cite book | title = Digital Video and HDTV …   Wikipedia

  • Densitometry — Principle of spot light densitometry Densitometry is the quantitative measurement of optical density in light sensitive materials, such as photographic paper or film, due to exposure to light. Optical density is a result of the darkness of a… …   Wikipedia

  • Exposure (photography) — Underexposure redirects here. For the 2005 film by Oday Rasheed, see Underexposure (2005 film). A long exposure showing stars rotating around the southern and northern celestial poles. Credit: European Southern Observatory …   Wikipedia

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