Specifications

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■ DCF
Digitizer Configuration Format. A DCF defines the input
data format and among other things, how to accept or
generate video timing signals such as horizontal sync,
vertical sync, and pixel clock.
■ Display memory
See frame buffer.
■ Driver
A software program that services an operating system so that
the operating system can use a hardware device.
■ 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 used for display.
Since a computer sends out data faster than a screen can
display it, the data is temporarily stored in the frame buffer.
Matrox imaging boards that have a display section typically
have two frame buffer surfaces: a dedicated or dynamically
allocated main (underlay) surface and an overlay (VGA)
surface. Separate VGA boards typically have only one frame
buffer surface, a VGA frame buffer surface.
If keying is enabled, those areas of the overlay frame buffer
surface that have a specified color allow the underlay frame
buffer surface to show through.
■ Grab
To acquire an image from a camera.