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Radiographic contrast (rt)
| Глоссарий терминов по технологиям неразрушающего контроля (NDT) |
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Contrast, английский
- The difference in intensity between the darkest and the brightest parts of an image.
- The level of variation between light and dark areas in an image.
- Контраст
- The range of light to dark values in a picture or the ratio between the maximum and minimum brightness values.
- A common term used in reference to the video picture dynamic range, i.e., the
- Контраст; контрастный
- A measure of rate of change of brightness in an image.
- A common term used in reference to the video picture dynamic range, i.e., the difference between the darkest and the brightest parts of an image.
- The apparent difference in perceived brightness between two areas within the field of view. = (bmax - bmin)/bmax bmax = maximum brightness bmin = minimum brightness
- The difference between one tone and another or between the darkest and lightest parts of a scene or processed film. high contrast involves not only an extreme brightness ratio but also few gray tones. low contrast has an expanded range of intermediate tones with limited pure blacks and whites. tip: what is too contrasty for one medium or emulsion may not be so for another. see: brightness ratio; and fall-off (on a surface).
- The relationship between the lightest and darkest areas in a scene and/or photograph. a small difference means low contrast; a great difference high contrast. high contrast scenes usually cause the most exposure problems; however, their difficulty can mean they hold the potential for more expression. though contrast is often linked with scene brightness, there can be low contrast in a bright scene and high contrast in dim light. contrast can also describe attributes of color, composition, and inherent qualities of film.
- The measure of rate of change of brightness in an image.
- N противопоставление linguistics direct ~ прямое противопоставление indirect ~ косвенное противопоставление minimal ~ минимальное противопоставление non-minimal ~ неминимальное противопос- тавление contrastive a 1 контрастивный, контрастный; 2 сопоставительный analysis, distribution, linguistics, pair, phonology, semantics contrastive-typological a сопоставительно- типологический analysis сontronym см. contranym
- The degree of difference between light and dark extremes of color on a monitor, device screen, or printed output, or between the darkest and lightest areas in a photo. the greater the difference, the higher the contrast.
- An indication of the difference between the thicker and thinner parts of characters in a typeface.
- Visible differences between parts of a microscopic specimen
- Comparison of two or more colors in such a way that enables them to be differentiated. color theorist johannes itten [learn more about his theories here and here] was one of the first to define the contrasting properties of color. itten noted seven types of color contrast:
- (1) difference in color or brightness between a test indication and its background or surroundings. (2) in film radiologic testing, the difference in film blackening or density observed from one area to another and resulting from various radiation intensities transmitted by the object. contrast, subject: ratio of radiation intensities transmitted by selected portions of object being radiographed.
- (1) разница в цвете или яркости между индикатором испытания и его фоном или окружением. (2) при радиологических испытаниях пленки - разница в почернении или плотности пленки, наблюдаемая на разных участках и возникающая в результате различной интенсивности излучения, передаваемого объектом. контраст, предмет: соотношение интенсивностей излучения, передаваемого выбранными частями рентгенографируемого объекта.
- Difference in color or brightness between a test indication and background.
- Difference between the amount of light reflected or transmitted by an object and by the background in the field of view. 306 visual testing
- Difference in visibility (brightness, color or temperature) between an indication and the surrounding surface.1
- (1) difference in color or brightness between a test indication and background. (2) difference between the amount of light reflected or transmitted by an object and by the background in the field of view.
- Difference in color or brightness between indication and background.
Radiographic radiographic definition (rt), английский
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Radiographic exposure device (rt), английский
Radiation protection survey radiation trap (rt), английский
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