MATLAB: Does the preview window not update when using the Image Acquisition Toolbox 1.0 (R13.0.1+)

acquisitionbeingblankdroppedframesgreyimageImage Acquisition Toolboximaqpreviewupdatewindow

I opened a preview window to preview the images I am acquiring with the Image Acquisition Toolbox. However, the preview window has stopped responding and I received a status message that frames are being dropped. How can I avoid or correct this problem?

Best Answer

There are various reasons that could cause the preview window to:

- stop updating

- display a blank grey window

- or display a status message indicating that frames are being dropped

Some of the potential causes of these problems are:

- the device may have entered into an unknown state and is not responding appropriately

- there is not enough memory available for the incoming image data

To resolve the problem, try using IMAQMEM to increase the FrameMemoryLimit, and make sure no other applications are accessing the device.

Related Solutions

MATLAB: Is the DCAM (IEEE-1394) FireWire camera not recognized by the Image Acquisition Toolbox

The Image Acquisition Toolbox supports connections to IEEE-1394 (FireWire) DCAM-compliant devices using the Carnegie Mellon University (CMU) DCAM driver. If the toolbox does not recognize a DCAM camera connected to your computer, most likely the camera has not been configured to use the CMU DCAM driver.

The supported version of the driver is shipped with MATLAB and can be located in the following directory:

$MATLABROOT\toolbox\imaq\imaqextern\drivers\win32\dcam

(where $MATLABROOT is the MATLAB root directory on your machine, as returned by typing

matlabroot

at the MATLAB Command Prompt.)

Be sure to install the CMU DCAM demo application when you install the CMU DCAM driver. To verify your FireWire camera has been successfully configured to use the CMU DCAM driver, try accessing your camera from the CMU demo application. If the CMU demo application can access your DCAM camera, it has been successfully configured and can be used by the toolbox.

For information on configuring your camera to use the CMU DCAM driver, refer to the Troubleshooting section of the Image Acquisition Toolbox documentation:

Troubleshooting (Image Acquisition Toolbox)

http://www.mathworks.com/help/imaq/troubleshooting-1.html

Note the CMU driver strictly adheres to the DCAM specification. The toolbox does not support vendor specific DCAM drivers which frequently offer extensions or modifications to the DCAM specification.

MATLAB: Does AVI logging not work for the Image Acqusition Toolbox 1.0 (R13.0.1+)

This error message occurs when MATLAB 6.5 (R13.0.1) has been reinstalled, but the Image Acquisition Toolbox 1.0 (R13.0.1+) has not. The Image Acqusition Toolbox 1.0 (R13.0.1+) ships a modified avi.dll file that enables its AVI file logging capabilities. If MATLAB is reinstalled without reinstalling the toolbox, the avi.dll version that the toolbox requires is no longer available. In order to prevent this error, reinstall the Image Acquisition Toolbox 1.0 (R13.0.1+).

Best Answer

Related Solutions

MATLAB: Is the DCAM (IEEE-1394) FireWire camera not recognized by the Image Acquisition Toolbox

MATLAB: Does AVI logging not work for the Image Acqusition Toolbox 1.0 (R13.0.1+)

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