User`s guide

Creating the VideoDevice System Object
14-3
Creating the VideoDevice System Object
You use the imaq.VideoDevice function to create the System object. You can specify
the adaptorname, deviceid, and format at the time of object creation, or it will use
defaults, as follows.
Constructor Purpose
obj = imaq.VideoDevice Creates a VideoDevice System object,
obj, that acquires images from a specified
image acquisition device. When you specify
no parameters, by default, it selects the
first available device for the first adaptor
returned by imaqhwinfo.
obj =
imaq.VideoDevice(adaptorname)
Creates a VideoDevice System object,
obj, using the first device of the specified
adaptorname. adaptorname is a text
string that specifies the name of the
adaptor used to communicate with the
device. Use the imaqhwinfo function to
determine the adaptors available on your
system.
obj =
imaq.VideoDevice(adaptorname,
deviceid)
Creates a VideoDevice System object,
obj, with the default format for specified
adaptorname and deviceid. deviceid
is a numeric scalar value that identifies
a particular device available through
the specified adaptorname. Use the
imaqhwinfo(adaptorname) syntax
to determine the devices available and
corresponding values for deviceid.
obj =
imaq.VideoDevice(adaptorname,
deviceid, format)
Creates a VideoDevice System object, obj,
where format is a text string that specifies
a particular video format supported by the
device or a device configuration file (also
known as a camera file).
obj =
imaq.VideoDevice(adaptorname,
deviceid, format, P1, V1, ...)
Creates a VideoDevice System object, obj,
with the specified property values. If an