Re: MATLAB Video Acquisition

agarwal.abhishek@xxxxxxxxx wrote: 
Dear Group Members

I am working on real-time panaromic video generation using three
cameras.
As a prototype, I am implementing the solution in MATLAB, just to see
if things work out well. Also, instead of normal CCD cameras I am using
webcams as of now. Since the algorithm is still very crude, and is not
real-time, I have to capture video streams from the 3 cameras and store
them for further processing.
Now the problem that I am facing is of memory overflow. Due to the
difference between the rate at which frames are coming-in into memory
and the rate at which frames are being stored on secondary storage is
quite significant, I always end up getting memory errors (even with 11
seconds of capture).

Settings and Configurations:

Pentium4 3 GHz
256 MB RAM (Cannot be changed, constraint)
3 Logitech USB Webcams
Resolution '640 x 480' (Cannot be changed, constraint)
Frame Rate '6 fps'
Returned Color Space 'Grayscale'
imaqmem  '100000000' (100 MB)
LoggingMode 'Disk&Memory' (Memory, for I need the timestamps)
Trigger 'Manual'
FramesPerTrigger 'Inf'
Video stored as 'AVIObject'

Is there a way out to get rid of the memory overflows? What other
properties can be tweaked to reduce the memory requirements? Also, any
other information, comments or URLs are welcome.

Any sort of help will be highly appreciated.
Thanking You All

Abhishek Agarwal
New Delhi



Or if you don't have access to the Video Acquisition Toolbox, try googling for "Video for MATLAB" - from memory it was done by some people from the University of East Anglia, UK.
.

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