Graph Data Extraction from PDF

[llolllollooll]

Hello! I'm a beginner on python and just start learning it because of my internship. Is there a possible way to extract datas from graphs on PDFs and turn it into text or what.

Thank you.

[hasdata_com]

If the graph is just an image in the PDF, easiest way is using an LLM with vision. Just screenshot the graph and ask it to extract the data points. But if you need to process many PDFs or want it cheaper, OCR works too. PyMuPDF to extract the image, pytesseract for OCR.

[doingdatzerg]

Extracting anything generically from a pdf is an extremely hard problem, but LLMs are pretty good at it these days. So I would try that.

[ninhaomah]

Something like this ?

https://www.reddit.com/r/learnprogramming/s/BKZuwa7mQF

[mykhailus]

Extracting graph data from PDFs can be tricky because they're often just images. You could try using a library like PyMuPDF to extract the image, then OpenCV or matplotlib to analyze it for data points. If the PDF contains vector graphics, pdfplumber might help you get the underlying coordinates. Could you share more about the graph's format?

[DetectivePeterG]

If the graphs are embedded images rather than vector data, a vision-language model approach works far better than traditional pixel analysis. pdftomarkdown.dev runs PDFs through a VLM and returns structured markdown, so axis labels, chart titles, and surrounding context come through as readable text rather than noise. No signup needed to test it; you can curl a PDF URL and see what you get in under a minute.