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链接: https://automeris.io/WebPlotDigitizer/
It is often necessary to reverse engineer images of data visualizations to extract the underlying numerical data.WebPlotDigitizer is a semi-automated tool that makes this process extremely easy:
Works with a wide variety of charts (XY, bar, polar, ternary, maps etc.)
Automatic extraction algorithms make it easy to extract a large number of data points
Free to use, opensource and cross-platform (web and desktop)
Used in hundreds of published works by thousands of users
Also useful for measuring distances or angles between various features
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