QNAP NAC-300N, Руководство пользователя

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Appendix A. Terms and Glossary
1.
Pixel Size
The actual size of each pixel, measured in micrometer (µm). The larger the pixel
size, the shorter the time for exposure but the resolution may be lower. The
smaller the pixel size, the longer the time for exposure and the resolution is better.
2.
AGC (Automatic Gain Control)
A circuit designed to maintain gain automatically at a constant mean intensity level.
3.
Aspect Ratio
The aspect ratio is the ratio of the width of the image to the height of the image.
For most television images the current aspect ratio is 4:3. HDTV uses an aspect
ratio of 16:9.
4.
ATW (Auto Tracking White Balance)
In ATW mode, white balance is automatically adjusted in real time to match the
lighting of the object.
5.
Backlight Compensation
The ability of a camera to compensate in cases where a subject with a large amount
of background light would otherwise be obscured by blooming or silhouetting.
6.
Bayonet Mount
A method of attaching lens to a body that makes use of interlocking flanges on the
body and lens rather than a threaded tube that is screwed into a threaded base.
The length between the mounting side and CCD side of camera is 38mm or 48mm.
7.
C-mount
Type of camera mount which measures 17.526mm from the camera's CCD to the
rear mounting surface of the lens.
8.
CCD (Charge Coupled Devices)
Charged Coupled Device. A sensor that collects light and turns it into an electrical
signal.
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