Extension https://extensions.libreoffice.org/en/extensions/show/digitizer-of-xy-chart digitize external charts to curves. In my viewpoint, it is an important tool for scientists and engineers with old paper reports. The extension is compatible with LO 3.3 and higher, but the highest Version of compatibility is 6.2.x in my tests. Another way is to repair of extension to the actual API of LO 7.x. Acrobat Reader can write curves in pdf to XLSX. german: https://praxistipps.chip.de/scan-in-excel-umwandeln-so-klappts_34681 But with digitizer is more control.
software origin includes also a digitizer. It can digitize normal and polar coordinates. See more in https://www.originlab.com/doc/Origin-Help/Tool-Digitizer With pdf-import in Draw, there is a base for a great feature in chart and calc for this.
Created attachment 174426 [details] source code of last version compatible with 3.3.x to 6.2.y Help for the author to adapt the important and nice extension to the new API for Version 6.3 and higher is also an alternative.
UX team, is it a good idea / realistic to integrate a image-to-data tool into LibreOffice? Or should it remain as an extension? In its simplest form, it would be inferring a single formula from a curve, or a discrete number of data points into a cell range. Changing the component to "Calc" as I can only see it functioning there, populating cells with data.
> UX team, is it a good idea / realistic to integrate a image-to-data tool > into LibreOffice? Or should it remain as an extension? That is better answered by whomever will maintain the code.
IMO perfectly suited for an extension (and not inbuilt). Alternatively just use one of the many web applications.
We discussed the topic in the design meeting. LibreOffice is not an OCR tool and while such a function might be handy in some case it is not a common use case for office suits and does not justify the effort to implement and maintain. Not least because since 3rd party tools provide the functionality. => WF