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Appendix B
StillColor
PCI/PXI-1408 and NI-IMAQ for Win95/NT
B-6
©
National Instruments Corporation
StillColor RGB
RGB cameras output a color image using three lines. StillColor RGB
will acquire the three signals and construct a color image. The three
lines are connected to three channels on the PCI/PXI-1408. One frame
is acquired from each of the three channels, which represent the red,
green, and blue planes of the image. StillColor combines these frames
to construct the color image.
RGB Color Acquisition
The PCI/PXI-1408, in conjunction with NI-IMAQ, supports acquisition
of color images from an RGB camera.
The NI-IMAQ driver can acquire the three frames and rebuild the image
automatically. The output image can be a simple RGB color image or
one of many image representations supported by the driver. See the
Introduction to Color section later in this appendix for more
information on image representations.
For a StillColor RGB snap, connect the three camera channels—red,
green, and blue—to Video 1, Video 2, and Video 3, respectively, on the
PCI/PXI-1408 device. Specify a channel for the video synchronization
signal by selecting that channel as the sync source using the Operating
Mode tab in
IMAQConf
. (See Chapter 5, Configuration Utility, for more
information on the configuration utility.) A typical RGB camera
includes the composite video synchronization signal in the green signal.
You can also use other synchronization sources, such as an external
composite video signal that can be connected to Video 0 or an external
TTL composite synchronization signal that can be connected to the
CSYNCIN pin of the DSUB connector. (See Chapter 4, Signal
Connections, for signal connection information.)