using WEBCAM in simulink EXTERNAL MODE

I need to use a webcam to capture realtime videos in order to vision-based control of a 6 DOF robot. the library i'm using to control robot joints, works just in Simulink EXTERNAL MODE. anybody knows how to connect to an imaging device (webcam) in simulink external mode? I could do it in Normal Mode but wasn't able to get it to work in external mode.

Thanks in advance !

Answer 1

[Kaustubha Govind]

If you are using the From Video Device block, you might find this discussion useful: http://www.mathworks.com/matlabcentral/answers/1443-image-acquisition-in-external-mode