Exporting images (png) through export_fig - painfully slow

조회 수: 33(최근 30일)
John Cruce
John Cruce 2021년 9월 17일
답변: yanqi liu 2021년 11월 26일
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));

답변(4개)

Image Analyst
Image Analyst 2021년 9월 19일
Try comparing it to exportgraphics() but you'd need r2020a or later.

Yair Altman
Yair Altman 2021년 9월 19일
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 2021년 10월 24일
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 2021년 11월 26일
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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