# ermig1979/AntiDupl

A program to search similar and defect pictures on the disk

Repository: https://github.com/ermig1979/AntiDupl
Canonical: https://ross.abutalabs.com/products/antidupl
Homepage: https://ermig1979.github.io/AntiDupl
Language: C#
License: MIT
License Family: permissive
Last push: 2026-04-11T12:57:54+00:00

## Health v2 (maintenance only)
Score: 70/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 76, release rhythm 46, longevity 100
- inputs: {"age_days": 3169, "days_push": 144, "days_rel": 144, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1659, forks 112 (observed 2026-08-28T04:05:18.283268+00:00)

## What it is
AntiDupl.NET is a free open-source Windows desktop application that finds duplicate and similar images on disk by comparing file contents, supporting many formats including JPEG, PNG, GIF, TIFF, WEBP, HEIF, and AVIF. It can also detect images with certain defects, automating cleanup of large image collections.

## Use cases
- find duplicate photos in a large image collection
- detect similar images that are not byte-identical
- find corrupted or defective image files
- clean up disk space wasted by duplicate pictures
- compare images across jpeg png gif tiff webp heif formats
- automate deduplication of a photo library instead of manual review

## When to choose
- you need a GUI tool on Windows to deduplicate image collections
- you want content-based similarity matching, not just hash-identical files
- you also want to detect defective/damaged images
- you need support for many formats including HEIC, AVIF, JXL, PSD

## When to avoid
- you need a cross-platform GUI - the GUI targets Windows (the separate AntiDuplX CLI covers Linux)
- you need automated/server-side deduplication in a pipeline - use the AntiDuplX command-line tool instead
- you need video or audio deduplication
- you need exact-hash deduplication at massive scale in a data center

## Facets
- artifact type: application
- maturity: active
- function: image-processing, gui, developer-tools
- domain: image-processing, photography, files, desktop-applications
- platform: windows, cross-platform
- tags: duplicate-image-detection, similar-image-search, image-defect-detection, photo-management, csharp, dotnet, desktop

## Member repositories
- ermig1979/AntiDupl (main) score 70

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:18.283268+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:44:41.978092+00:00, confidence not recorded.
  - readme: https://github.com/ermig1979/AntiDupl (fetched 2026-08-28T04:05:18.283268+00:00, sha a780196bb341)
  - homepage: https://ermig1979.github.io/AntiDupl (fetched 2026-08-29T11:17:07.638195+00:00, sha ad4b222ae2b1)
- Data as of 2026-08-30T08:39:29.467469+00:00.