This plugin filters duplicate images using perceptual image hashing

• Hashing library: https://github.com/jenssegers/imagehash
• Count bits extension for PostgreSQL: https://github.com/sldab/count-bits

You can use this database image with stock tt-rss docker setup: https://hub.docker.com/repository/docker/cthulhoo/postgres-count-bits

(docker-compose.override.yml):

services:
  db:
    image: cthulhoo/postgres-count-bits:13-latest

Installation

• Git clone to plugins.local/af_img_phash
• Enable in feed editor for specific feeds (after enabling the plugin)

If you can't use count bits on PostgreSQL, you can do the following:

Note that using this SQL hashing function would be several orders of magnitude slower than count bits which will affect overal tt-rss performance.

• Install SQL hashing function in sql/bitcount_funcdef_pgsql.sql
• Set config option: TTRSS_IMG_HASH_SQL_FUNCTION (either via environment or through config.php)