How do I speed up my image acquisition routine in Image Acquisition Toolbox 1.9 (R14SP3)?

I am unable to acquire images from Image Acquisition Toolbox quickly enough for real-time processing. I use a loop of the form:

for indx=1:1000

      % read the next frame

      start(vid);

      wait(vid);

      fdat = getdata(vid);

      % Process the data

end

Answer 1

[MathWorks Support Team]

In order to improve the speed of an image acquisition routine, execute the following steps:

1. Set the Trigger Mode to 'Manual' before starting the video acquisition.

triggerconfig(vid,'manual');

2. Set the number of triggers to be executed to infinity if you plan on acquiring an indefinite number of frames.

set(vid,'TriggerRepeat',inf);

3. Start the acquisition only once outside the loop (This is the time-consuming part of the process)

start(vid);

4. Use the less time-consuming TRIGGER function to acquire frames inside the loop.

trigger(vid);

fdat = getdata(vid);