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 character vector 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 character vector 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 invalid property name or
property value is specified, the object is not created. |
Specifying properties at the time of object creation is optional. They can also be specified after the object is created. See Using Properties on a VideoDevice System Object for a list of applicable properties.