Frame Grab Equipment:

The AT&T Targa 16 and the Willow Peripherals Publishers VGA
provided the frame grab capability for this project.  The Targa
16 has sophisticated color capabilities, with a capture
resolution of 512 by 480 pixels and 32,768 displayable colors
(from a palette of 16 million).  Because the large color spectrum
of the Targa 16 cannot be displayed on a digital PC monitor, the
Targa must reconvert image output into an analog RGB
(red-green-blue) format for display on an analog monitor.  The
Publishers VGA is a B/W system that captures images at a
resolution of 320 by 200 pixels with 64 gray levels, and 640 by
400 pixels with 256 gray levels in an enhanced version.  The
integration of a frame grab component into an image acquisition
and management system is discussed in Section 4.2.0, where a
description of the CRISTAL System prototype is presented.

<cfile47>   Frame Grabbers