---
license: odc-by
language:
- en
tags:
- ocr
- document-understanding
- benchmark
- pdf
- text-extraction
size_categories:
- 1K<n<10K
task_categories:
- image-to-text
pretty_name: olmOCR-Bench English
---

# olmOCR-bench (English Only)

This is a filtered version of the [allenai/olmOCR-bench](https://huggingface.co/datasets/allenai/olmOCR-bench) dataset containing only English documents.

## Test Cases: Before vs After

| Category | Before | After | Removed | % Retained |
|----------|--------|-------|---------|------------|
| arxiv_math | 2927 | 2917 | 10 | 99.7% |
| headers_footers | 760 | 520 | 240 | 68.4% |
| long_tiny_text | 442 | 442 | 0 | 100.0% |
| multi_column | 884 | 691 | 193 | 78.2% |
| old_scans | 526 | 526 | 0 | 100.0% |
| old_scans_math | 458 | 458 | 0 | 100.0% |
| tables | 1022 | 929 | 93 | 90.9% |
| **TOTAL** | **7019** | **6483** | **536** | **92.4%** |

## PDF Files: Before vs After

| Category | Before | After | Removed | % Retained |
|----------|--------|-------|---------|------------|
| arxiv_math | 522 | 521 | 1 | 99.8% |
| headers_footers | 266 | 190 | 76 | 71.4% |
| long_tiny_text | 62 | 62 | 0 | 100.0% |
| multi_column | 231 | 182 | 49 | 78.8% |
| old_scans | 98 | 98 | 0 | 100.0% |
| old_scans_math | 36 | 36 | 0 | 100.0% |
| tables | 188 | 169 | 19 | 89.9% |
| **TOTAL** | **1403** | **1258** | **145** | **89.7%** |

## Summary

| Metric | Original | English-Only | Retained |
|--------|----------|--------------|----------|
| Test Cases | 7019 | 6483 | 92.4% |
| PDF Files | 1403 | 1258 | 89.7% |

## Usage

This dataset follows the same structure as the original olmOCR-bench:

```
├── README.md
├── stats.json
└── bench_data/
    ├── *.jsonl (test cases for each category)
    └── pdfs/<category>/*.pdf
```

## Categories

- **arxiv_math**: Math formulas from arXiv papers
- **headers_footers**: Header/footer detection tests
- **long_tiny_text**: Long documents with tiny text
- **multi_column**: Multi-column layout documents
- **old_scans**: Historical scanned documents
- **old_scans_math**: Math from historical scans
- **tables**: Table extraction tests

## License

This dataset inherits the ODC-BY-1.0 license from the original olmOCR-bench dataset.

## Original Dataset

Based on [allenai/olmOCR-bench](https://huggingface.co/datasets/allenai/olmOCR-bench).