WebPlotDigitizer

Opensource computer vision assisted software to help extract numerical data from images of plots, maps and much more.

Features

A large quantity of useful data is hidden behind data visualizations that are only shared as images. WebPlotDigitizer makes it easy to extract this information using a mix of computer vision algorithms and manual tools.

Work with a wide variety of charts: XY (line and scatter), Bar Charts, Histograms, Polar, Ternary and even Circular Chart Recorders.
Load multiple files at once including PDF documents. Work with any image format that's supported by your browser.
Make simple measurements like distance, angles, area and perimeter.
Privacy focused: All algorithms are implemented in client side Javascript and images/documents are never uploaded to a remote server. 100% Offline version is also available for download.
Translated to Simplified Chinese, German and French.

WebPlotDigitizer has been cited in thousands of publications (and even XKCD). To cite in your own work, you can use the following information:

    @software{Rohatgi2024,
        url = {https://automeris.io/WebPlotDigitizer.html},
        author = {Rohatgi,  Ankit},
        title = {WebPlotDigitizer},
        version = {4.7},
        year = {2024}
    }

Plotcon, 2017

Slides from my talk can be downloaded here.