User guide

LBA-USB User Guide Document No: 11294 Page 45
Capture Method
The Capture panel controls how imaged data is to be acquired and saved into
the frame buffer. You must first choose a capture Method, and then subsequent
selections need to be made. The capture methods are:
 Continuous – Configures LBA-USB to continuously acquire new frames of video
images from the camera as fast as possible, or at a rate determined by the value
in the Interval setting. See the Capture Interval paragraph below.
 Single Shot – Select this option to acquire a single frame of video from the
camera. Each time Start! is clicked, the camera captures one video frame, and
then stops. Successive clicks on Start! each cause one additional frame
acquisition. The Interval setting has no effect on single shot captures.
 Block – Configures LBA-USB to acquire a specified number of video frames from
the camera at the specified Block Length. Unique to this method, frames are not
displayed, nor are results computed during the acquisition cycle. This occurs in
order to allow LBA-USB to capture frames contiguously, with no delays or
dropped frames due to time spent performing results computations. When the
acquisition completes, the last acquired frame appears on the display along with
the results computed for that frame.
If the specified Block Length is larger than the frame buffer capacity, the data
will wrap through the buffer and overwrite earlier frames. The Interval setting
is operational.
Note: When using Block Mode in combination with Logging or
Statistics computations, refer to section 0.
 Live Video – This is a raw video display-only method. LBA-USB continuously
acquires video frames based on the Trigger Type selection and the Interval
setting.
Live video data remains totally unprocessed, is not placed into the frame buffer,
and yields no computed results. This is best described as the “is my camera
working?” mode. When in live video mode, the frame indicator presents “-6”, and
the Frame Comment displays “Live Frame.”
Note: It is best to set the Trigger Type to the CW mode when using Live Video
to locate your laser beam on your camera’s detector. Live Video mode
only operates in 2D display mode.
 Post Process – This method does not collect video frames from the camera, but
rather allows processing or reprocessing of stored data either in the current
frame buffer or from a data file. When Post Process is selected, the right half
of the Capture panel becomes activated.
• Frame Buffer – Processes any data already in the frame buffer. Specify
the frame location as the Start location and the Number of frames to