Display image inside parfor loop
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Dear Experts I am doing Parallel computation in matlab and I use simple parfor but inside of parfor I need to use imshow function. But matlab stopped by Error using imshow (line 208) IMSHOW unable to display image. I searched for solution and just I found batch work. Actually I couldn't used batch inside parfor. I put my code here and I appreciate if somebody can help me.
parfor i=5:nuframe
ts=read(video,i);
org_img=ts(:,:,1);
hisq_img=histeq(org_img);
imshow(hisq_img);
end
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Ben11
il 5 Ago 2014
I'm afraid you can't control image display inside a parfor loop, i.e. inside individual workers. However you can store all the images in a temporary array/cell array/whatever and wait until the parfor loop terminates before displaying them.
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Ben11
il 5 Ago 2014
Mhh maybe allow some case inside the parfor loop in which you exit the loop to display some frames and then come back inside the loop? This is just an idea though I don't know if it's possible.
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Edric Ellis
il 6 Ago 2014
One option is to use PARFEVAL and display the images back at the host when they're ready. Here's an example: http://blogs.mathworks.com/loren/2013/12/09/getting-data-from-a-web-api-in-parallel/
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