nndb

Stable Diffusion output archiver and metadata parser, written entirely in Rust.

Overview

This project intended to store images generated by Stable Diffusion, but can also be general-purpose tagged imageboard. Interface resembles various *booru boards.

Features

• Stable diffusion webui metadata parsing
• NovelAI metadata parsing
• Deconstruction of prompts to tags
• Search by tags (inclusion and exclusion)
• Pixiv metadata fetcher (if image was downloaded from it and it's original filename left unchanged)
• Grouping images by similarity, generation seed and pixiv illust id
• Thumbnail generation

Installation

1. Get built distribution.
2. Packed distribution already has all needed options and folders: input for input files, pool for elements, thumb for thumbnails, and static with compiled backend files.
3. Tune config: testing_mode, auto_scan_files, log_level, etc.
4. Start backend with nndb <path-to-config.toml>.
5. If you haven't changed host and port options, open http://127.0.0.1:8080/ in browser.
6. See usage.

Build

Prerequisites:

• Stable Rust toolchain
• Trunk
• Rust Wasm target
• Just

Build process

• Windows
  • run just pack and built artifact will be in dist folder

Development

Install prerequisites.

Install sqlx-cli and run following command to create development database

just create-dev-db

There are justfile with commands to run backend, serve frontend, and start editor (helix) with needed environment variables:

• DATABASE_URL - needed by sqlx crate for compile-time checked SQL queries
• BACKEND_URL - needed by frontend at build time to construct requests to backend

To run stack, you can open 2 terminals and execute just run-back and just serve-front commands. Note that frontend is rebuilt automatically on changes, while backend is not.

Usage

Importing images

Copy/move generated images to configured input_folder. If you have auto_scan_files set to true in your config, files will be imported automatically after some time. Otherwise you need to go to Dashboard and start import manually. Depending on testing_mode option files will be copied to element_pool folder or just moved and renamed.

You can provide additional tags on this stage, if you place files in folder with certain name pattern:

tag.<tag type>.<tag name>.<tag2 type>.<tag2 name>...

e.g.
tag.metadata.highres.tag.simple_background
^~~~                 ^~~
|                    \ this is tag type
|
\ this part is mandatory and triggers parsing of the remaining part

Where <tag type> is one of the following strings:

• service
• artist
• character
• title
• metadata
• tag - also strings that are not listed will be mapped to this type.

You can track importing progress in Dashboard.

Index page

Index page displays list of found elements and this selection's most frequent tags. Tags are splitted in categories and sorted in alphabet order. Little hash # sign near tag name leads to tag edit page. A search by tag will be performed on tag name click.

Using search

Search field provides tag autocompletion. Start typing and choose from drop-down list. You can prefix tags with ! to exclude them from selection. Search terms are separated with whitespace. A term is considered a meta-tag if it has : in it. Right part of meta-tag can be wrapped in " to preserve whitespaces and : in it.

There are currently only these meta-tags:

• group:<integer> - to include only images in this group (by similarity).
• extgroup:<integer> - to include only images in this group. While upper meta-tag only includes images in groups formed by image similarity, this one uses groups from external sources (pixiv illust id and stable diffusion seed).
• meta:<string> - to include only elements that contain <string> in their raw metadata.

Element page

This page displays element, its metadata and associated elements. Metadata block displays tags, time when this element was added to the database, and Stable diffusion parameters.

Element image is clickable and will expand to full size on click (and shrink back on another). By default it is fitted to viewport.

There is also associtated elements block on this page. This block displays elements that have the same group IDs with this element. Different groups are separated by their headers.

There is little Edit button on tag block header. If it was pressed, tag block will switch to edit mode.

In this mode tags can be added or deleted from this element. Reset button will discard all changes, Save will send tag change request to the backend and + will show tag input field. Tag input field can accept multiple tags separated by whitespace.

Dashboard

Dashboard is a web ui page dedicated to control backend. It has following elements:

• Count of elements and tags in database. Not updated automatically.
• Service tasks status that updated automatically.
• Recent backend log that also updated automatically.
• Buttons to send control requests
  • Start import - manually starts import tasks
  • Update tag counts - most of the time tag counts should be in sync with elements, but if something gone wrong, this request will fix it.
  • Clear group data - removes all images groups formed by image similarity.
  • Fix thumbnails - checks thumbnails folder and generates missing thumbnails.
  • Retry imports - if there are imports (of pixiv metadata), that have been failed, retry them one more time.
  • Fetch wikis - fetch part of danbooru tags database for tag types and aliases. It is recommended to run this request before importing images.

Tag page

This page displays info about tag and form that allows to edit them. You can change parameters and click Change tag to apply changes:

• Name - unique primary name of the tag.
• Alternative name - second name of the tag. It may be not unique and contain any characters.
• Type - type of the tag (Tag, Artist, Metadata, Character, Title).
• Hidden - this boolean value determines if tag is hidden from search queries. This tag won't be autocompleted and images that has it are not shown by default. However, if this tag entered explicitly into search, this restrictions go away.

There is input field with autocompletion below the edit form. Here you can input tags that will be added to alias group with this tag. When aliased tag is used in search, selection result will include not only elements with tag itself, but also elements with tag aliases.

Pixiv metadata

You can extract your credentials using various projects like this one.

If config section pixiv_credentials is filled with valid credentials, additional metadata will be fetched from Pixiv for images with matching names:

Pixiv image regexes.
From pixiv web: 
"(\d+)_p\d+_master\d+": e.g. "108397938_p0_master1200.jpg"
From pixiv mobile:
illust_(\d+)_\d+_\d+: e.g. "illust_108651440_20230605_123207.png"

Note the tags with cursive japanese characters and a Source links metadata section. There is also a new entry in the Time section.

Pixiv metadata fetcher will try to write japanese tags without provided translations in romaji. But if danbooru tag database was fetched before (Dashboard), these tags could be translated better using aliases from that db.