drawnow() causing very slow display of images
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Hi all,
I've read several other questions on this but didn't find a satisfactory answer. My apologies however, if this is already up.
I am building a GUI to display processed video. I do this using
imshow(image,'Parent',axes)
then
drawnow
for each frame in a loop. It is VERY slow. Approx 0.5 seconds per frame (~12 seconds to display 1 second of video in real time). It also accounts for half my total processing time per frame.
Can I make it faster?
Any help is greatly appreciated!!
Cheers, KB
채택된 답변
Image Analyst
2014년 2월 18일
I solved that problem with older versions of MATLAB by putting in a "cla" or "cla('reset')" into the code just before the imshow. Evidently with older versions sometimes the images "stack up" and are all in there and you're just piling one on top of another and it gets slower and slower as it runs out of memory. Try that and let me know if it speeds it up.
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추가 답변 (1개)
David Sanchez
2014년 2월 18일
I solved a similar issue by adding a very short pause, this will clean up the buffer and speed up the pseudo-video. Add:
pause(0.001)
right after drawnow
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