User`s guide

imaq.VideoDevice
17-49
Function Purpose
release Release VideoDevice resources and allow property value
changes.
release(obj)
releases system resources (such as memory, file handles, or
hardware connections) of System object, obj, and allows all its
properties and input characteristics to be changed.
isLocked Returns a value that indicates if the VideoDevice resource is
locked. (Use release to unlock.)
L = isLocked(obj)
returns a logical value, L, which indicates whether properties are
locked for the System object, obj. The object performs an internal
initialization the first time the step function is executed. This
initialization locks properties and input specifications. Once this
occurs, the isLocked function returns a value of true.
preview Activate a live image preview window.
preview(obj)
creates a Video Preview window that displays live video data for
the VideoDevice System object, obj. The Video Preview window
displays the video data at 100% magnification (one screen pixel
represents one image pixel). The size of the preview image is
determined by the value of the VideoDevice System object ROI
property. If not specified, it uses the default resolution for the
device.
closepreview Close live image preview window.
closepreview(obj)
closes the live preview window for VideoDevice System object,
obj.