MATLAB IMAGE ACQUISITION TOOLBOX 3 Uživatelská příručka stáhnout pdf (Strana 141)

100

101

Controlling Logging Parameters

5 Remove frames from the memory buffer —Whenyouremove

frames from the memory buffer, the o bject d ecrements the value of the

FramesAvailable property by the number of fram es 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 I mage Data in to the MATLAB Workspace”

on page 6-3.

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.

5-27

1 2 ... 136 137 138 139 140 141 142 143 144 145 146 ... 407 408

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