how to select two webcams using webcamlist if the cameras have the same name?

I got two identical cameras, when I use webcamlist, the names for both two are the same, so, how can I select one of them? or both? is for stereo vision

Answer 1

[Antonio Santos]

Thank you, but I already did it more simple using webcam(1) and webcam(2).

Answer 2

[Image Analyst]

They should have a different device ID. Look at this snippet where I find my Lumenera camera and get the device ID. I have only 1 though, but you will probably have 2.

  adaptorNames = hardwareInfo.InstalledAdaptors
  % Might look something like:
  % InstalledAdaptors: {'dcam'  'gentl'  'gige'  'lumeneraimaqw64'  'matrox'  'winvideo'}
  matches = strfind(adaptorNames, 'lumenera');
  % Find out which index is the Lumenera Camera.
  LumeneraIndex = find(~cellfun(@isempty, matches))
  if isempty(LumeneraIndex)
    % No camera is attached.
    UserSettings.useSamplePictures = true;
    errorMessage = sprintf('Error in function InitializeVideoCamera().\nMATLAB does not see the Lumenera video camera adapter software.');
    ME = MException('CameraDetect:LumeneraSoftwareMissing', errorMessage);
    throw(ME);
  end
  % If we get to here, MATLAB has the lumenera adapter installed.
  theLumeneraAdaptor = adaptorNames{LumeneraIndex}
  
  hardwareInfo2 = imaqhwinfo(theLumeneraAdaptor)
  devInfo = hardwareInfo2.DeviceInfo
  if size(devInfo, 2) == 0
    % No camera is attached.
    UserSettings.useSamplePictures = true;
    errorMessage = sprintf('Error in function InitializeVideoCamera().\nWindows does not see a Lumenera video camera attached.\nIf you think there is, then use Device Manager to check\nthe "Imaging Devices" category.');
    ME = MException('CameraDetect:NoLumeneraCameraPresent', errorMessage);
    % Launch Device Manager.  Use trailing ampersand, otherwise program does not continue until user closes Device Manager.
    system('C:\Windows\System32\devmgmt.msc &')
    throw(ME);
  end
  devName = devInfo.DeviceName
  devID = devInfo.DeviceID
  supportedFormats = devInfo.SupportedFormats

Answer 3

[Junaid Bashir]

hello friends !! can anyone post the code for using two webcams for stereo vision in matlab. i have connected both cams and i have already got vision for both the cameras seprately but i don't know how to combine both visions to get the stereo vision