Exporting images (png) through export_fig - painfully slow

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John Cruce
John Cruce 2021-9-17
回答： yanqi liu 2021-11-26
I'm using export_fig to export a figure to a high resolution png and it's painfully slow. Takes about 36 seconds to perform the export. I also see the following warning upon export:
Warning: print2array generating a 83.6M pixel image. This could be slow and might also cause memory problems
Any suggestions on alternatives to speed up this portion of my code?
export_fig('-dpng','-opengl','-r450',sprintf('C:\\Users\\Username\\Documents\\%s',datetimelabel));

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回答（4 个）

Yair Altman
Yair Altman 2021-9-19
Try to either reduce the resolution (the -r450 part), or to save as a vector-graphics image (PDF/EPS) rather than a PNG bitmap.
Image Analyst
Image Analyst 2021-9-19
Try comparing it to exportgraphics() but you'd need r2020a or later.
Oliver Woodford
Oliver Woodford 2021-10-24
Reducing the level of anti-aliasing will reduce the sixe of the images created, saving time. Use the '-aX' option, where X is 1 to 4 (faster to slower).
yanqi liu
yanqi liu 2021-11-26
yes，sir，may be use getframe or print，such as
f=getframe(gcf);
f=frame2im(f);
imwrite(f, './result.tif');
or
print(gcf,'-dpng','-r200','result')

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