Dalsa PC2-Comp Express OC-P2EM-COMP0, User Manual

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Glossary of Terms PC2-Comp Express
DDC
Display Data Channel. A data channel used by newer monitor which communicates monitor
properties (such as maximum resolution and refresh rate) to the associated video adapter.
Driver
Also called a device driver, a program routine that links a peripheral device to the operating
system.
Frame
One complete image data set or its equivalent storage space.
Frame buffer
An area of memory used to hold a frame of image data. A frame buffer may exist on the
acquisition hardware or be allocated by the acquisition hardware device driver in host system
memory.
Front Porch
This is the area of the video waveform that sits between the start of horizontal blanking and
the start of horizontal sync.
Genlock
When two cameras are genlocked, their internal sync circuits are driven by a common
external source. These cameras output video frames synchronous to each other.
Grab
Acquiring an image frame by means of a frame grabber.
Grayscale
In image processing, the range of available brightness levels, displayed in shades of gray. In
an 8-bit system, the gray scale contains values from 0 to 255.
Host
Refers to the computer system that supports the installed frame grabber.
Interlaced
Describing the standard television method of raster scanning in which the image is the
product of two fields, each of which is made up of the image's alternate lines (that is, one
field is comprised of lines 1, 3, 5, and so forth, and the other is comprised of lines 2, 4, 6, and
so forth)
Look-up Table
A table that is used to convert values into related values from the table.