MATLAB: Does MATLAB crash when accessing a webcam with the Image Acquisition Toolbox 1.0 (R13.0.1+)

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I am using MATLAB and it crashes when accessing a Web cam with the Image Acquisition Toolbox.

Best Answer

The following are some suggestions to prevent MATLAB from crashing or rebooting when accessing a webcam with the Image Acquisition Toolbox 1.0 (R13.0.1+):

1. Simultaneously accessing the same device from multiple applications is strongly discouraged.

2. If a device driver becomes unstable, they may need to be reinstalled or updated.

3. Video For Windows (VFW) drivers are known to be unstable. Therefore, VFW drivers are expected to cause problems and should be avoided if possible.

4. If you have multiple devices from the same manufacturer installed, please disconnect all the devices except for one to alleviate instability issues due to unstable device drivers.

Please visit our Product and Services page to find more information about the supported cameras and drivers that are compatible with Image Acquisition Toolbox.

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MATLAB: Are ‘The Imaging Source’ USB cameras supported with Image Acquisition Toolbox

For USB cameras, the individual model compatibility is better addressed by the specific vendor in terms of compatibility with a particular driver they provide.

For these two particular cameras, the vendor appears to provide drivers for Windows only:

https://www.theimagingsource.com/products/zoom-autofocus-cameras/usb-2.0-color-autofocus-cameras/dfk22auc03f/

https://www.theimagingsource.com/products/zoom-autofocus-cameras/usb-2.0-monochrome-autofocus-cameras/dmk22auc03f/

Please confirm with the manufacturer if the drivers are compatible with

DirectShow

compliant imaging applications on Windows. If this is the case, the camera may work with Image Acquisition Toolbox:

https://www.mathworks.com/hardware-support/video-capture-device.html

MATLAB: Am I unable to obtain any device properties when creating video input objects using the winvideo adapter with the Image Acquisition Toolbox 1.0 (R13.0.1+)

To access device specific properties, the selected video source object must be accessed.

% Create a video input object using a Windows web cam.
vid = videoinput('winvideo', 1);
% Access the selected video source object.
src = getselectedsource(vid);
% Determine what device specific properties are available.
get(src)

If device specific settings, like frame rate or brightness, are not available on the video source object, the device does not provide access to device specific settings. This is usually caused by devices using the older VFW (Video for Windows) device drivers, which do not always expose the DirectX interfaces required by the toolbox. Without these interfaces, the toolbox cannot programmatically query the device for any properties, which prevents the toolbox from providing a command line interface to the device settings.

Although the device may provide a UI interface to various image and device settings, the toolbox can only provide access to the settings exposed through standard DirectX interfaces. Often times, device manufacturers will develop their own custom UI panels that expose various settings. However, these settings are only accessible using the graphical UI panels, not by any programatic DirectX interface.

To work around this, use the device's application UI to configure the desired settings.

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Related Solutions

MATLAB: Are ‘The Imaging Source’ USB cameras supported with Image Acquisition Toolbox

MATLAB: Am I unable to obtain any device properties when creating video input objects using the winvideo adapter with the Image Acquisition Toolbox 1.0 (R13.0.1+)

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