Get numbers out of any chart
Methods, tool comparisons, and worked examples for researchers and analysts who refuse to retype data from a screenshot.
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5 min readDataFromChart vs Engauge Digitizer: Browser or Desktop?
A comparison of DataFromChart (browser-based) and Engauge Digitizer (open-source desktop) for chart extraction — workflow, axis support, and which one fits your machine.
7 min readThe Limits of AI Chart Extraction: A Field Guide
Every way vision LLMs and specialized chart-understanding models fail at chart extraction in 2026, with one canonical example per failure mode and the calibrated-tool antidote. The reference post.
5 min readWorkshop: Reconstruct a Kaplan-Meier Curve
Extract a two-arm survival curve sampled at 6-month intervals. The workflow used by meta-analysts when authors don't share patient-level data — step-function precision included.
6 min readSpecialized Chart-Understanding Models: ChartOCR, DePlot, PlotQA, MatCha
The chart-extraction ML research literature in one post. What ChartOCR, DePlot, PlotQA, and MatCha actually do, how they perform on real charts, and why none of them are end-user products.