MATLAB: Does the Image Acquisition Toolbox support camera properties like Binning and Subsampling

Question

I would like to make use of the Binning and Subsampling properties of my camera in MATLAB 7.7 (R2008b) using Image Acquisition Toolbox.

Answer 1

Depending on the device, there are a couple of ways in which Binning and Subsampling can be accessed in MATLAB using the Image Acquisition Toolbox.

Following are few guidelines on using these properties:

1.If the camera supports Binning and Subsampling, there is a possibility that the properties are device specific.

All device-specific properties are properties of video source objects, not video input objects. To access these device specific properties from MATLAB, use this code:

vid = videoinput('winvideo'); 
src = getselectedsource(vid); 
get(src)

2.Binning is the property of the operating mode of the camera. For example, if the camera supports the formats such as: 'F7_Y8_1360x1024', 'F7_Y8_680x512', etc; we can see that 'F7_Y8_680x512' is the format which has smaller resolution. The smaller resolution format is the binned format and for using a binned mode, create a video input object as follows:

vid = videoinput('dcam', 1, 'F7_Y8_680x512');

Please check the output of IMAQSUPPORT. If there are any formats with a smaller resolution, one can make use of the binned modes by creating the VIDEOINPUT object as mentioned above.

3. Subsampling property can be replicated in MATLAB as follows:

subSampledImage = originalImage( 1:2:end, 1:2:end, : )

4.Many a times though the properties are listed in the camera’s documentation, one may not be able to use them in MATLAB since the WINVIDEO adaptor does not expose the properties in a way that the Image Acquisition Toolbox can work with them. In such cases, we suggest contacting the camera vendor and ask them to consider developing support for MATLAB and/or Image Acquisition Toolbox.