User`s guide

6 Acquiring Image Data

6-30

Remove frames from the memory buffer — When you remove frames from the

memory buffer, the object decrements the value of the FramesAvailable property

by the number of frames removed.

To remove frames from the memory buffer, call the getdata function, specifying

the number of frames to retrieve. For more information about using getdata, see

“Bringing Image Data into the MATLAB Workspace” on page 7-3.

data = getdata(vid,5);

After you execute the getdata function, check the values of the FramesAcquired

and FramesAvailable properties again. Notice that the FramesAcquired

property remains unchanged but the object has decremented the value of the

FramesAvailable property by the number of frames removed from the memory

buffer.

vid.FramesAcquired

ans =

vid.FramesAvailable

ans =

The following figure illustrates the contents of the memory buffer after frames are

removed.