Image Acquisition Toolbox

1
Image Acquisition Toolbox
2
Identifying Available Devices

• imaqInfo imaqhwinfo Identifying Installed
  Adaptors
• matroxInfo imaqhwinfo('winvideo') Obtaining
  Device Information
• device1 matroxInfo.DeviceInfo(1) show device
  information of device ID 1

3
Accessing Devices and Video Sources

• vidobj videoinput('winvideo', 1,
  'RGB24_720x576') Access an image acquisition
  device.
• preview(vidobj) Open the preview window.

4
Single Frame Acquisition

• snapshot getsnapshot(vidobj) To acquire a
  single frame
• imagesc(snapshot) Display the frame in a figure
  window.

5
Multi-Frame Acquisition

• set(vidobj, 'FramesPerTrigger', 50) Configure
  the number of frames to log upon triggering.
• start(vidobj) To initiate an acquisition
• imageData getdata(vidobj, 30) Retrieve some
  of the logged frames.
• imagesc(imageData(,,,30)) Display the last
  frame extracted from memory.

6
Acquire Data Continuously

• set(vidobj, 'FramesPerTrigger', inf) To acquire
  data continuously,
• start(vidobj) Initiate the acquisition.
• stop(vidobj) Stop the acquisition.

7
Get Data from Memory

• numAcquired get(vidobj, 'FramesAcquired')
  View the total number of frames that were logged
  before stopping.
• imageData getdata(vidobj, numAcquired)
  Retrieve all logged data.
• imagesc(imageData(,,,10)) Display one of the
  logged frames.

8
Delete and Clear Video Input Object

• Once the video input object is no longer
  needed, delete it and clear it from the
  workspace.
• delete(vidobj)
• clear vidobj