Image Acquisiton Timing Variation

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Jason
Jason on 26 Jan 2021
Hello, I am seeing a wide variation on timing issues using the IMAQ (with Genicam adaptor)
vidobj=app.vidobj1;
tic;
trigger(vidobj); %Requires manual triggerconfig, start(vidobj) continuously passes data from
% camera to matlab buffer. Trigger then extracts the last frame from the buffer
pause(0.1);
%Deal with frames not being available
nf=vidobj.FramesAvailable;
ct=0;
while nf < 1
nf=vidobj.FramesAvailable;
ct=ct+1;
if ct > 100
ReportMessage(app,'Max Timeout Retries Reached');
break
end
pause(10/1000);
end
frame= getdata(vidobj,1);
%[frame,time1, meta]= getdata(vidobj,1);
dt=num2str(toc,'%.3f'); %Time since trigger started
ReportMessage(app,['------getFrame Time =',num2str(dt,'%.2f'),'---Frame TimeOut Retries = ',num2str(ct)]);
My exposure time is set to 0.4s. So my timing dt is before the trigger to after getdata so should be at least 0.4s. However I'm seeing a massive variation.

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