chart-data-extractor
Chart Data Extractor Skill
Extracts data from images of charts and graphs — bar charts, line charts, pie charts, scatter plots, and tables in images — producing a structured data table that can be used in spreadsheets or rebuilt in any charting tool. Built to leverage Opus 4.7 pixel-level image analysis capabilities.
Required Inputs
Ask the user for these if not provided:
- The chart image (upload a screenshot or image file)
- Chart type (if ambiguous — bar / line / pie / scatter / other)
- What matters most (approximate trends / precise values / specific data points / categorisation)
- Known axis values (optional — if the user knows the max/min values to anchor the extraction)
Output Structure
1. Chart Identification
| Attribute | Value |
|---|---|
| Chart type | [Bar / Line / Pie / Scatter / Area / Other] |
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