Matrox Corona Installation And Hardware Reference page 92

92 Appendix C: Glossary
Exposure time
Refers to the period during which the image sensor of a
camera is exposed to light. As the length of this period
increases, so does the image brightness.
Field
One of the two halves that make up an image. One half
consists of the image's odd lines (known as the odd field); the
other half consists of the image's even lines (known as the
even field).
Frame
A single image grabbed from a video camera.
Frame buffer
A frame buffer is a dedicated storage area often used for data
transfers between devices of differing speeds. For example,
since a computer sends out data faster than a screen can
display it, the data is temporarily stored in the frame buffer.
The buffer is generally thought of as a two-dimensional
surface with a certain pixel depth.
Grab
To acquire an image from a camera.
Horizontal sync
The part of a video signal that indicates the end of a line and
the start of a new one.
See also vertical sync.
HSL
A color space that represents color using components of hue,
saturation, and luminance. The hue component describes the
actual color of a pixel. The saturation component describes
the concentration of that color. The luminance component
describes the combined brightness of the primary colors.
Host
In general, Host refers to the principal CPU in one's
computer.