The useful result
Label chart values by the evidence visible in the image rather than by apparent precision.
- Label chart values by the evidence visible in the image rather than by apparent precision.
A bar between two tick marks does not supply an exact number. A vision-capable assistant can help inspect a chart, but a crop that removes the axis can make a confident answer less useful. Teach yourself to request three evidence states—printed, estimated and unreadable—and keep the original image beside the result.
Select the named model only if it is available in your interface. API controls and consumer-app controls differ. You can practise the technique on the supplied fictional inputs with an available compatible assistant first. This lesson is documentation-based; examples are expected results, not a claim that we ran the named model.
Before you start
- A chart you own or have permission to inspect.
- A crop that retains the legend, units, relevant axis and the target mark.
Bring your own attachment
Attach the original chart and a close crop in a compatible image-input interface. Keep the legend, units and relevant axis visible; remove private identifiers.
Review evidence
Documentation-based review · 2026-10-18
Provider documentation checked on 18 October 2026. Examples and checks are original illustrative exercises, not recorded platform tests. Cover artwork is conceptual and does not imply provider sponsorship.
Crop the evidence together
Keep enough context to know what the target mark represents. If the axis is in thousands or percentages, preserve that label. Attach both the overview and close crop so the assistant can relate the detail to the full chart.
Example / expected result
Illustrative example; not a recorded model result.
Fictional chart: ticks at 40 and 60; a bar ends halfway between them, without a printed value.
Check your result
A reader can identify the series and units from the supplied images.
Request evidence states
Ask for visible labels first, then estimates with a range or approximation sign. If the mark is blurred, ask for a better image or underlying data instead of a precise decimal.
Inspect the attached chart and crop. Return mark, visible label, units, value, and evidence state PRINTED/ESTIMATED/UNREADABLE. Do not invent decimal precision. Cite the visible axis or label supporting each value.Example / expected result
Illustrative example; not a recorded model result.
Target bar | no printed value | chart units | approximately 50 | ESTIMATED between ticks 40 and 60.
Check your result
The unlabelled halfway bar is described as about 50, not an exact 50.00.
Check against source data
Use the chart’s original data or labelled source when an exact number matters. Record whether the value came from the image or the underlying table. A sharper image improves inspection but is not a replacement for unavailable data.
Check your result
Any exact value has a direct printed label or source-data reference.
When it goes wrong
Cropping can remove a logarithmic axis, baseline break or unit multiplier. A text-only model cannot inspect an image. A visually plausible interpolation can still be wrong, so do not use it as audited data.
Make it your own
Make a second crop that omits the units. The correct response should request the missing context rather than assume a unit or copy the earlier estimate as exact.
Useful next resources
Sources and review
Last checked Oct 18, 2026. Features and account limits can change. Verify important results against your original material.
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