getCameraList

Create a live hardware connection from the MATLAB software to the NVIDIA hardware by using the jetson function. To create a live hardware connection object, provide the host name or IP address, user name, and password of the target board. For example,

hwobj = jetson('jetson-board-name','ubuntu','ubuntu');

To find the camera name, use the getCameraList function.

camlist = getCameraList(hwobj)

camlist =

  2×3 table

             Camera Name              Video Device            Available Resolutions        
    ______________________________    _____________    ____________________________________

    "vi-output, ov5693 2-0036"        "/dev/video0"    "[1280 720],[2592 1458],[2592 1944]"
    "Microsoft LifeCam Cinema(TM)"    "/dev/video1"    "(View resolutions)"   

If the function does not list a USB based camera, try reconnecting the USB webcam and run the updatePeripheralInfo function. This function tries to scan the available webcams on the target when there is an addition or deletion.

updatePeripheralInfo(hwobj);

Create a camera object, cam using the name of the camera from the list and a supported resolution. For multiple cameras with the same name, use the 'VideoDevice' argument to identify a camera by its Linux device number. The cam object has the following camera properties.

cam = camera(hwobj,"vi-output, ov5693 2-0036",[2592 1944])

cam = 

  camera with properties:

           Name: 'vi-output, ov5693 2-0036'
      ImageSize: [2592 1944]
    VideoDevice: '/dev/video0'

To capture a frame of image from this camera and display it in MATLAB, use the following commands.

img = snapshot(cam);
figure();
imagesc(img);
drawnow;

To change the resolution of the image capture, you must clear the camera object by using the clear function and then use the camera function to connect to the camera again.

clear cam;
cam = camera(hwobj,"vi-output, ov5693 2-0036",[1280 720]);