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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4 min readWorkshop: Multi-Series Line Chart with a Legend
Extract 36 data points across three product lines from a year of monthly data. Practice the per-series workflow that AI chart extraction reliably gets wrong.
6 min readWhy AI Models Get Chart Data Wrong
Vision LLMs read images as patches, gravitate to round numbers, and treat axis interpretation as a language task. Here's why that combination ruins chart extraction — and what would have to change for it to work.
3 min readWorkshop: Extract a Simple Bar Chart (5 Minutes)
A guided practice extraction of a 5-bar chart with known ground-truth values. Hands-on intro to the five-step digitization workflow, with an answer key to grade yourself.
7 min readExtract Data from a Scatter Plot (Including Dense Ones)
Click each dot for sparse scatter plots; use color-based auto-extraction for dense ones. The cutoff is roughly 50 points. Worked example on a 200-point three-cluster genomics scatter.