User`s guide

Creating Image Acquisition Objects
5-13
For example, with Matrox frame grabbers, you can download digitizer configuration
format (DCF) files, in their terminology. These files configure their devices to support
particular cameras.
Some image acquisition device vendors provide utility programs you can use to
create a device configuration file or edit an existing one. See your hardware vendor's
documentation for more information.
To determine if your image acquisition device supports device configuration files, check
the value of the DeviceFileSupported field of the device information structure
returned by imaqhwinfo. See “Getting More Information About a Particular Device” on
page 5-4 for more information.
When you use a device configuration file, the value of the VideoFormat property of the
video input object is the name of the file, not a video format string.
This example creates a video input object specifying a Matrox device configuration file as
an argument.
Specifying the Selected Video Source Object
When you create a video input object, the toolbox creates one or more video source
objects associated with the video input object. The number of video source objects created
depends on the device and the video format. The Source property of the video input
object lists these video source objects.