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How to reduce Image Acquisition time

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Mark Golberg
Mark Golberg 2016-2-15
评论： Mark Golberg 2016-2-24
Hello, elapsedTime for the following code equals 1.0592 seconds.
imaqreset
vid = videoinput('pixelinkimaq');
src=getselectedsource(vid);
set(vid,'ROI',[0 0 64 64])
set(src,'FrameRate',150)
set(src,'Exposure',0.002)
set(vid,'FramesPerTrigger',150);
triggerconfig(vid, 'manual');
start(vid);
tic
trigger(vid);
wait(vid,Inf);
frames = getdata(vid, get(vid,'FramesAvailable'));
elapsedTime = toc
I really really need it to be less than 1 second. Any Ideas how running time can be reduced?
THANKS

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回答（2 个）

Walter Roberson
Walter Roberson 2016-2-15
You asked for a FrameRate of 150 frames per second, and you asked for 150 FramesPerTrigger, so you are asking for 150 Frames Per Trigger / 150 Frames Per Second = exactly 1 second per Trigger. You cannot reduce the acquisition time for 1 second's worth of frames to below 1 second.
  4 个评论
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Image Analyst
Image Analyst 2016-2-15
I don't know that it's any different than the 1.0592 seconds he originally said, unless he decided to record fewer frames, like the 140 I suggested.
Mark Golberg
Mark Golberg 2016-2-24
1 second takes me ~1.5 seconds to processed and display. Trying to solve this with buffer and parallel computing...

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Image Analyst
Image Analyst 2016-2-15
What if you try
set(src,'FrameRate', 160)
or
set(vid,'FramesPerTrigger',140);
How long a time do those give you?
  2 个评论
Image Analyst
Image Analyst 2016-2-15
Mark, did you try my answer yet? You might just have to do trial and error to "home in" on the setting that produces a length as close to 1 second as possible.
Mark Golberg
Mark Golberg 2016-2-24
I can't , I need to work with fps 150.

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