- 2026-05-30
- by LethaldiranMX
- Trends
- 0 Comments
DeveloperReverse image search and duplicate detection for the WordPress media library, powered by perceptual hashing.
Snopix adds reverse-image search to the WordPress media library. Upload
an image (or drop one onto the dashboard widget) and the plugin returns the
visually most similar attachments you already have indexed, ranked by a
composite score over three fingerprints:
- A 64-bit perceptual hash (pHash) over a DCT of the greyscale thumbnail
- A 48-element RGB colour histogram
- A 32-element Sobel edge-orientation histogram
The same fingerprints power the Duplicates tab, which clusters
near-identical attachments so you can keep one and bulk-delete the rest.
Features
- Reverse-image search via the admin dashboard or a
[snopix_search]shortcode for
the front end. - Duplicate detection with per-group “keep” selection and bulk delete.
- Background bulk indexing via WP-Cron — no PHP timeouts on large libraries.
- REST API at
/wp-json/snopix/v1/with rate limiting on the public search
endpoint. - Settings panel to gate the public search endpoint to logged-in users only.
- Tools panel: reindex everything, clear the index, delete orphan rows,
flush caches. - Pre-downscale of large probe images before fingerprinting to keep search
latency bounded.
Supported MIME types
image/jpeg, `image/png`, `image/gif`, `image/webp`, `image/bmp`.
Where data lives
Snopix creates a single custom table, {prefix}snopix_index, that stores one
row per indexed attachment with its three fingerprints. Uninstalling the
plugin drops the table.
Accuracy notice
Snopix is functional, but search ranking, duplicate detection and the
threshold tuning may be less accurate than expected – you may see occasional
false positives or miss visually-similar images depending on your media
library. Please report anything that looks off.
