Just been doing this in a context other than COVID, but have to give a huge thumbs up for some freeware called Graph Grabber. Quick, intuitive, efficient.
OT: extracting data from images of graphs etc
May 07, 2020
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Information here may be outdated?
One trick that sometimes works where hovvering-over serves up the datapoint, if you disable Javascript , the full data set gets served up as a texted CSV file, if .csv is the original hidden source.
Useful tip. Not in my current case where I am using scans from a 60 year old blueprint!
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