unpaper/unpaper
A post-processing tool for scanned sheets of paper. observed · 2026-08-28
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
Flags: no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 5498
- days_rel: n/a
- days_push: 783
- n_releases_24m: 0
Adoption not part of the score
1198 stars · 94 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
unpaper is a command-line post-processing tool for scanned sheets of paper, especially book pages from photocopies. It cleans dark edges, deskews pages, and improves readability before PDF conversion or OCR.
Use cases
- clean up scanned book pages before converting to pdf
- deskew crooked scanned pages automatically
- remove dark edges from double-sided book page scans
- preprocess scanned images for better ocr results
- batch process scanned sheets of paper
When to choose
- you scan book pages and want cleaner, straighter output
- you need a lightweight C tool with only ffmpeg as a dependency
- you want automated preprocessing before OCR pipelines
When to avoid
- you need a GUI for manual image cleanup
- you work with born-digital PDFs rather than scanned images
- you need per-page interactive editing rather than batch processing
Facets
cli-tool · maturity maintenance
image-processing ocr image-processing pdf developer-tools windows cli cross-platform scanned-documents deskew book-scanning c linux macos
1 source
- readme: https://github.com/unpaper/unpaper · fetched 2026-08-28 · a6364c2620d3
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| unpaper/unpaper | main | 23 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem