MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Guide de l'utilisateur Page 178

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6 Acquiring Image Data
6-30
5
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 =
15
vid.FramesAvailable
ans =
10
The following figure illustrates the contents of the memory buffer after frames are
removed.
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