How can I continually update the UI Axes in App Designer to display images from a CMOS camera?

I would like to create a video feed in the UI Axes in App Designer. At the moment, I am updating the CData of the figure, though I am having large lag times. The code that I am using runs quickly--in about 100ms--but the image on the UI Axes updates approximately every two seconds. Preferably, the video feed would run parallel so that I can also interact with my GUI simultaneously. Is there a way to use the UI Axes to run this type of figure?

[Sarah Mohamed]

Are you using the 'drawnow' function to update the axes immediately?

[Cody LaBelle]

I have used the drawnow function to update the axes, though it did not reduce the updating time. Also, I updated MATLAB to 2017b (pre-release) due to the fact that the drawnow functionality was added to the UI axes in 2017a. Unfortunately this did not help.

As a temporary work around, I am using an external figure to display my video feed, which runs very quickly.

[Sarah Mohamed]

I see, thanks for trying that out. Could you share the code you are using to update the UIAxes?

Answer 1

[karim botros]

it works in app designer

you can use global var if you want to use the object camera in another function

global cam
im=image(zeros(340,340,3),'Parent',app.UIAxes);
preview(cam,im);
setappdata(app.UIAxes, 'cam', cam);

[Ahmer Shahid]

I cannot get the camera on axis by this code.

[karim botros]

make sure that the camera is connected to matlab