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Add export option for PNG (72 dpi), fixes #394 #652

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kaabl wants to merge 7 commits intoome:masterfrom
kaabl:issue-394-png-export
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Add export option for PNG (72 dpi), fixes #394 #652
kaabl wants to merge 7 commits intoome:masterfrom
kaabl:issue-394-png-export

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@kaabl
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@kaabl kaabl commented Dec 5, 2025

Hi all,

this PR fixes #394. I added an option to export/save images as PNG in lower resolution (72 dpi).

Best,
Lea

@will-moore
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will-moore commented Jan 12, 2026

Thanks for the PR - apologies for the delay.
PNG export works fine, but it needs to handle font-sizes (now that we support text shapes) and the line thickness (scaling to 72dpi). These are working fine for TIFF:

Comparing PNG (left) with OMERO.figure (right):
Screenshot 2026-01-12 at 10 42 50

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Export as PNG, lower resolution

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