Display Video Stream in App Designer
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I am developing a simple app in App Designer and I have been struggling with including a video stream from a webcam.
I have come across the following post, but so far I have been unsuccessful in getting my app to work: https://uk.mathworks.com/matlabcentral/answers/357814-how-to-create-a-custom-preview-window-for-matlab-webcam
So far, what I am doing is including the following commands in my start-up function:
app.Camera = webcam; %('USB2.0 PC CAMERA')
And the following lines relate to the activation of the video stream when a switch button is slid to Start:
% Value changed function: CameraStreamSwitch
function CameraStreamSwitchValueChanged(app, event)
im = image(app.UIAxes_2,zeros(size(snapshot(app.Camera)),'uint8'));
Many thanks in advance for the help!
Cris LaPierre on 22 Dec 2018
You are close. Here's some sample code that works for.
Add properties for the variables you create that you want to share
properties (Access = private)
Camera % webcam stream object
himg % image object handle
My startupFcn looks like this
value = app.CameraStreamSwitch.Value;
I would also suggest adding a closing function so the webcam doesn't remain open once the app closes.
% Close request function: UIFigure
function UIFigureCloseRequest(app, event)