Codesota · Benchmark · IAMHome/Leaderboards/Vision & Documents/Handwriting Recognition/IAM
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IAM.

13,353 handwritten text lines from 657 writers. Standard handwriting benchmark.

Paper ↗Leaderboard ↓Lineage
§ 01 · Leaderboard

Results by metric.

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wer

Wer is the reported evaluation metric for IAM. Codesota tracks published model scores on this metric so readers can compare state-of-the-art results across sources and model families.

Lower is better

Trust tiers for werverifiedpapervendorcommunityunverified

Muted rows were not state of the art when published — an earlier or same-year result already scored better.

RankModelTrustScoreYearLinksFix
01HTR-ConvText
Fetched from CodeSOTA API on 2026-04-20
verified12.92026Source ↗Looks wrong?
02HTR-VT
Fetched from CodeSOTA API on 2026-04-20
verified14.92026Source ↗Looks wrong?
03VAN
Fetched from CodeSOTA API on 2026-04-20
verified16.32026Source ↗Looks wrong?

cer

Cer is the reported evaluation metric for IAM. Codesota tracks published model scores on this metric so readers can compare state-of-the-art results across sources and model families.

Lower is better

Trust tiers for cerverifiedpapervendorcommunityunverified

Muted rows were not state of the art when published — an earlier or same-year result already scored better.

RankModelTrustScoreYearLinksFix
01TrOCR-large
Fetched from CodeSOTA API on 2026-04-20
verified2.892026Source ↗Looks wrong?
02TrOCR-base
Fetched from CodeSOTA API on 2026-04-20
verified3.422026Source ↗Looks wrong?
03HTR-ConvText
Fetched from CodeSOTA API on 2026-04-20
verified4.002026Source ↗Looks wrong?
04HTR-VT
Fetched from CodeSOTA API on 2026-04-20
verified4.702026Source ↗Looks wrong?
05VAN
Fetched from CodeSOTA API on 2026-04-20
verified5.002026Source ↗Looks wrong?
Lineage

IAM in context.

See full ocr benchmarks lineage →
None — this is where the lineage begins.
This benchmark (1)
active2002-09
IAM
Successors (2)
saturated2015-08
ICDAR 2015
From clean handwritten text to incidental scene text — same 'read the pixels' task, fundamentally different visual domain. Spawned the decade of detection-then-recognition pipelines.
saturated2019-05
FUNSD
From transcription to structure: FUNSD reframed OCR as 'find the question, link to its answer' rather than 'recognise every character'. The shift that produced LayoutLM and the entire form-understanding line.
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