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Neutral density
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Neutral density. a neutral-grey pre-lens filter to reduce overall brightness without altering colour balance.
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N/d, английский
Filtro neutro, испанский
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Density, английский
- Stand density
- As applied to timber, density is the mass of wood substance and moisture enclosed within a piece expressed in kilograms per cubic meter. as the mass will vary dependant on the amount of moisture in the piece, density is often expressed at a specified mois
- The weight per unit volume of a substance.
- The ability of a material to absorb light; the darker it is, the higher the density.
- The mass of a unit volume of a substance. its numerical value varies with the units used.
- Плотность
- Плотность; концентрация; удельный вес
- A measure of how tightly packed the atoms of a substance are. measured in grams per cubic centimeter. varies by the mineral or substance. for example, gold has a high density, while quartz has a low density. see also "specific gravity."
- The weight of cargo per cubic foot or other unit.
- In general terms, the measure of the light-gathering power of silver or dye deposits in film. also, the buildup of silver that creates the image in film and paper. a "dense" negative or slide is more opaque than a "thin" one. there is an ideal density for film, one that yields good prints or slides; too little density usually means that the film was underexposed (or underdeveloped), too much means its been overexposed (or overdeveloped).
- As usually applied to wood of normal cellular form, density is the mass per unit volume of wood substance enclosed within the boundary surfaces of a wood-‑plus-‑voids complex
- (1) the weight of a material per unit volume; (2) a measurement of the transparency of a medium, as related to light transmission.
- The degree of aggregation; the quantity of any entity distributed over an area per unit of areal measure, e.g., persons per acre, families per acre, or dwelling units per square mile.
- Плотность вязания
- The weight of a body in comparison with its bulk.
- The weight of water divided by the amount of space it occupies. this is determined by the combined effect of temperature, salinity, and atmospheric pressure. cold, salt-laden water is denser than warmer, fresher water and will sink below it. see density levels.
- The ratio of the mass of any volume of a substance to the mass of an equal volume of a standard substance. for example, water is used as the standard substance to which the ratio of a quantity of a drill mud is compared.
- Having the quality of being dense, hard, or compact.
- Плотность; интенсивность; степень
- In relation to population, the number of individuals in a certain amount of space. absolute d.: number of organisms over unit of volume [1/m3]. relative d.: comparison of relative density, e.g. here more, there less.
- Mass per unit volume usually expressed as grams per cubic centimeter (g/cc). also known as specific gravity.
- The degree of darkness of an image. deny (pn)
- The mass per unit volume (usually expressed as grams per cubic centimeter). (also see specific gravity.) dent: on a loom, the space between the wires of a reed. deregistering (crimp): process of disordering or disaligning the crimp in a tow band to produce bulk. (also see threaded-roll process.)
- Quantity or mass per unit volume, unit area or unit length. energy density is the amount of energy per unit volume or mass (for example, the heating value of a litre of oil). power density is typically understood as the capacity deliverable of solar, wind, biomass, hydropower or ocean power per unit area (watts/m). for batteries the capacity per unit weight (watts/kg) is used. direct solar energy - see solar energy
- The mass of the substance per unit volume, usually specified at standard temperature and pressure
- The mass of liquid per unit of a substance at 15°c.
- Mass per unit volume.
- (1) in radiographic testing, degree of x-ray film darkness as a result of exposure as measured with a densitometer. (2) material property of mass per unit volume.
- Material property of mass per unit volume.
- Mass per unit volume, measured in kilograms per cubic meter (kg·m–3).
- Reference to the weight of foam used for seat and back cushions; either low density or high density.
Density, французский
Measured in grams per cubic centimeter (or kilograms per liter); the density of water is 1.0; iron is 7.9; lead is 11.3.
Density (d), английский
By definition, the log (1/t) where t is transparency. the value of d depends
Density (in situ), английский
Density (swollen), английский
Density -, английский
Плотностный каротаж
Density altitude, английский
Высота по плотности
Density apparent, английский
Density at relieving conditions, английский
Density change, английский
Density charge, английский
Density comparison strip (rt), английский
Alternative term for step-wedge comparison film.
Density contrast, английский
Density control, английский
The control of the density of concrete in field construction to ensure that specified values, as determined by standard tests, are obtained.
Density current, английский
See turbidity current.
Density currents, pi, английский
Плотностные потоки
Density function, английский
Функция плотности
Density gradient, английский
- Градиент плотности; градиент концентрации
- The change in density of a radiographic film at a particular film density per unit change in the logarithm of the exposure received by the film. the maximum density gradient of a film is usually called gamma.
Density identification area, английский
Density levels, английский
Ocean waters can be divided into three layers, depending on their density. at the top is the surface or mixed zone. this is unstable due to atmospheric interference. for example, evaporation could increase its salinity, or a cold front could reduce its temperature. in the middle is a transition zone known as the pycnocline layer (greek pycno = dense + cline = slope). this forms a barrier between the layers above and below, allowing little movement between them. at the bottom is the deepwater zone, which is cold, saline, dense and more or less stable, never interacting with the atmosphere (except in polar regions where the pycnocline is not always present).
Density log, английский
This radioactivity contact log responds to variations in the specific gravity of formations by emitting neurtrons and measuring the secondary gamma radiation from the detector to the instrument. this is particularly helpful when measuring porosity in shaley sands.
Brightness, английский
- Term for the intensity of illumination of a reproduced video picture.
- The attribute of visual perception in accordance with which an area appears to emit or reflect more or less light (this attribute of color is used in the color model hsb - hue, saturation, brightness). see lightness.
- A term to indicate the relative amount of light intensity available. brighter is more light, dimmer is less light. in an infrared system, the brightness control may affect actual image intensity or it may change the temperature range displayed. either eff
- The attribute of visual perception in accordance with which an area appear to emit more of less light. (luminance is the recommended name for the photo-electric quantity which has also been called brightness.)
- In ntsc and pal video signals, the brightness information at any particular instant in
- Яркость
- The value of a pixel in an electronic image, representing its lightness value from black to white. usually defined as brightness levels ranging in value from 0 (black) to 255 (white).
- In ntsc and pal video signals, the brightness information at any particular instant in a picture is conveyed by the corresponding instantaneous dc level of active video. control is an adjustment of setup (black level, black reference).
- Is strictly defined as an attribute of a visual sensation according to which an area appears to emit more or less light. we sometimes misuse the term brightness in this catalog instead of the more correct “luminance.” luminance, used for sources, is the luminous flux in an elemental beam from a given point per unit area per solid angle in the specified direction.
- The visual sensation of the luminous intensity of a light source. the brightness of a laser beam is most closely associated with the radiometric concept of radiance.
- A term mostly used in a qualitative way, related to the output power and beam quality of a laser; quantitatively
- The luminance of objects. the brightness of any area of the subject is dependent on how much light falls on it and how reflective it is. brightness range is the relationship we perceive between the light and dark subjects in a scene. brightness contrast is a judgment of the relative measure of that range, such as high, low, or normal. brightness values are sometimes referred to as ev (exposure values), a combination of aperture and shutter speed. brightness values in the scene are translated to tonal values on film.
- Value of a pixel in a digital image giving its value of lightness from black to white, with o being black and 255 being white.
- That attribute of visual perception in accordance with which a surface appears to emit more light or less light. now called luminance.
- The amount of light that is emitted by a computer monitor or picture displayed on the monitor.
- Яркость. для видеосигналов систем ntsc и pal
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Normal closed, английский
N/d, английский
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