Exporting images (png) through export_fig - painfully slow

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John Cruce
John Cruce 2021 年 9 月 17 日
回答済み: yanqi liu 2021 年 11 月 26 日
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));
  1 件のコメント
darova
darova 2021 年 9 月 19 日
Can't you reduce resolution?

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回答 (4 件)

Image Analyst
Image Analyst 2021 年 9 月 19 日
Try comparing it to exportgraphics() but you'd need r2020a or later.

Yair Altman
Yair Altman 2021 年 9 月 19 日
Try to either reduce the resolution (the -r450 part), or to save as a vector-graphics image (PDF/EPS) rather than a PNG bitmap.

Oliver Woodford
Oliver Woodford 2021 年 10 月 24 日
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 年 11 月 26 日
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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R2018a

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