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Photographic quantity information


Photographic quantity (also known as photoquantity) is a measure of the amount of light received by a sensor, such as a camera, in dimensionless units that account for information lost by integration over the spectral response of the sensor, while otherwise preserving the linear relationship involved in the interaction of light through one or more exposures. The photoquantity is neither radiometric nor photometric. The photoquantity is not radiometric because the sensor, camera, or the like, is not an ideal receiving antenna. Rather, the sensor has some non-flat spectral response. The photoquantity is not photometric, because the sensor's spectral response does not necessarily match the spectral response of the human eye.

Photoquantities are often involved in the solutions to comparametric equations, appear in research papers dealing with image processing, and are also used in the production of visual art made from multiple differently illuminated pictures of the same subject matter.

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Photographic quantity

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Photographic quantity (also known as photoquantity) is a measure of the amount of light received by a sensor, such as a camera, in dimensionless units...

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Photographic emulsion

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Photographic emulsion is a light-sensitive colloid used in film-based photography. Most commonly, in silver-gelatin photography, it consists of silver...

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Logarithmic scale

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to the ratio of the quantity and a reference quantity of the same type. The choice of unit generally indicates the type of quantity and the base of the...

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List of photographic films

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This is a list of currently available photographic films in a still camera film format. This includes recently discontinued films that remain available...

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Photographic film

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Photographic film is a strip or sheet of transparent film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive...

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Photographic developer

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In the processing of photographic films, plates or papers, the photographic developer (or just developer) is one or more chemicals that convert the latent...

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Magnitude

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Wiktionary, the free dictionary. Magnitude may refer to: Euclidean vector, a quantity defined by both its magnitude and its direction Magnitude (mathematics)...

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Film speed

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varieties of Weston Photographic Exposure Meters were produced in large quantities and sold throughout the world, mostly by Photographic dealers or agents...

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APEX system

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APEX stands for Additive System of Photographic Exposure, which was proposed in the 1960 ASA standard for monochrome film speed, ASA PH2.5-1960, as a means...

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Decibel

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become murky between the conventions of digital photographic technology and physics. Most commonly, quantities called "dynamic range" or "signal-to-noise"...

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Silver halide

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chemicals, and are commonly used in photographic film and paper. Silver halides are used in photographic film and photographic paper, including graphic art film...

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Photographic filter

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curves than filters only made for general photography. Photographic filters sell in larger quantities, at correspondingly lower prices, than many laboratory...

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English language

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include one, many, some and all, are used to specify the noun in terms of quantity or number. The noun must agree with the number of the determiner, e.g....

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Exposure value

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luminance). Exposure value is also used to indicate an interval on the photographic exposure scale, with a difference of 1 EV corresponding to a standard...

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553d Reconnaissance Squadron

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active during World War II as the 10th Photographic Reconnaissance Squadron. Constituted in 1942 as the 10th Photographic Squadron, the squadron conducted replacement...

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Zone System

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The Zone System is a photographic technique for determining optimal film exposure and development, formulated by Ansel Adams and Fred Archer. Adams described...

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Atomic bombings of Hiroshima and Nagasaki

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and two additional B-29s in Sweeney's flight for instrumentation and photographic support of the mission. Sweeney took off with his weapon already armed...

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Flash powder

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favorable triboelectric properties. Large quantities should never be mixed in a single batch. Large quantities are not only more difficult to handle safely...

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List of measuring instruments

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physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities of...

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Moon landing

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U.S. uncrewed lunar missions from 1958 to 1964 failing their primary photographic missions. However, Rangers 4 and 6 successfully repeated the Soviet lunar...

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Radiant energy

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perceivable change, such as exposure of photographic film. Standards organizations recommend that radiometric quantities should be denoted with suffix "e" (for...

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Great white shark

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suggest that the MALTA specimen was 5.3–5.7 m (17–19 ft) long. However, photographic evidence suggested that these specimens were larger than the size estimations...

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Photographic archive Gerola

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45°25′58″N 12°19′48″E / 45.43277°N 12.32994°E / 45.43277; 12.32994 Photographic archive Gerola is preserved by the Istituto Veneto di Scienze, Lettere...

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Saab 37 Viggen

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manufacturer Saab. It was the first canard-equipped aircraft to be produced in quantity and the first to carry an airborne digital central computer with integrated...

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