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Appendix D: Glossary
• 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.
• Interlaced scanning
Describes a transfer of data in which the odd-numbered lines of the source are
written to the destination buffer first and then the even-numbered lines (or
vice-versa).
See also
progressive scanning
.
•
Latency
The time from when an operation is started to when the final result is produced.
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