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Depth of field (dof)
| Lens Glossary |
Literally, the measure of how much of the background and foreground area before and beyond your subject is in focus. depth of field can be increased by stopping the lens down to smaller apertures. conversely, opening the lens to a wider aperture can narrow the depth of field. for more on this subject, see the explora article, “depth of field, part i: the basics.”
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Background, английский
- Фон
- The surface area against which the pattern is contrasted. the surface area of
- The portion of a scene that sits behind the main, foreground subject. the background can be made sharp or unsharp through the use of selective focusing techniques and depth of field manipulation.
- A фоновый; внеязыко- вой knowledge
- Sound or noise that interferes with radio or sonar reception.
- Фон, задний план о ~ for
- A page that you can assign to another page to create multiple layers in a drawing.
- In a graphical user interface such as windows, a pattern or picture in the screen background that can be chosen by the user.
- The area on a card that allows a user to make the card’s image a background when clicked on.
- The area that appears behind the tiles on the start screen.
- The color or image that appears behind the content of a visual element, for example, behind the text that is displayed in a textbox control or on your graphical user interface.
- The image that appears in the conversation window.
- The picture that appears in the photos hub.
- Formations on or signals from a test object that constitute the background to a discontinuity. the higher the level of background noise, the more difficult it is to distinguish a discontinuity. background signals may arise from visual, acoustic, chemical, electrical, or radiation sources that the sensor responds to. see also sensitivity; signal-to-noise ratio.
- Formations on or signals from a test object that constitutes the background to a discontinuity. the higher the level of background noise, the more difficult it is to distinguish a discontinuity. background signals may arise from visual, acoustic, chemical, electrical or radiation sources that the sensor responds to. see also neural acuity; sensitivity; signal-to-noise ratio.
- Formations on, or signals from, a test object that constitute the background to a discontinuity. the higher the level of background noise, the more difficult it is to distinguish a discontinuity. see also background fluorescence; neural acuity; sensitivity; signal-to-noise ratio. glossary b 491
- In magnetic particle testing, the appearance or brightness of the surrounding area acting to reduce the contrast of an indication. (2) nonrelevant signal that tends to interfere with the normal reception or interpretation of the target being sought.
Foreground, английский
- Dark foregrounds help hold the eye within the frame and increase the illusion of depth. bright foreground objects, especially out-of-focus or moving ones, can be distracting. tip: back or side-light the foreground using little or no fill. also see: frame.
- The brush color of displayed characters and graphics, for example, the color of the text that is displayed in a textbox control.
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Raw files, английский
Many pro and semi-pro digital cameras include the option for capturing raw files, which—unlike jpegs, tiffs, and other file formats—contain all of the data captured during the exposure in an unedited format. when processed, raw files can be adjusted far more extensively than images captured in other imaging formats, and can be saved as jpegs, tiffs, etc. the original raw file remains unaltered and can be reprocessed at any time for other purposes.
Interlaced scan, английский
Interlaced video is a commonly used video capture technique in which the imagery consists of two fields of data captured a frame apart and played back in a manner that reproduces motion in a natural, flicker-free form. interlaced video takes up less storage capacity than progressively captured video.
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