# FlexMonkey/Filterpedia

Core Image Filter Explorer & Showcase

Repository: https://github.com/FlexMonkey/Filterpedia
Canonical: https://ross.abutalabs.com/products/filterpedia
Homepage: http://flexmonkey.blogspot.co.uk/2015/12/filterpedia-core-image-filter-explorer.html
Language: Swift
License: GPL-3.0
License Family: copyleft
Last push: 2020-04-05T06:02:05+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3900, "days_push": 2341, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2318, forks 202 (observed 2026-08-28T04:06:36.939387+00:00)

## What it is
Filterpedia is an iPad application for exploring nearly all image filters provided by Apple's Core Image framework, with adjustable parameter sliders. It also showcases custom filters built with CIFilter compositions, GLSL CIKernels, and Metal kernel functions, serving as a companion to the book 'Core Image for Swift'.

## Use cases
- explore core image filters on ipad
- learn core image for swift
- find example cifilter code
- test custom metal kernel image filters
- browse image filter parameters interactively
- reuse custom core image filters in my project

## When to choose
- you're learning Apple's Core Image framework in Swift
- you want reusable custom CIFilter, GLSL, or Metal filter examples
- you need an interactive explorer for iOS image filters

## When to avoid
- you need image filtering on Android or non-Apple platforms
- you want a production-ready photo editing app rather than a demo/explorer
- you need actively maintained software (last release 2020)

## Facets
- artifact type: application
- maturity: maintenance
- function: image-processing, gui, developer-tools
- domain: image-processing, graphics, developer-tools, education
- platform: -
- tags: core-image, cifilter, metal, glsl, ipad-app, custom-filters, swift, ios, mobile

## Member repositories
- FlexMonkey/Filterpedia (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:36.939387+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 2026-08-30T02:38:52.318712+00:00, confidence not recorded.
  - readme: https://github.com/FlexMonkey/Filterpedia (fetched 2026-08-28T04:06:36.939387+00:00, sha 72b4e7a3de4a)
  - homepage: http://flexmonkey.blogspot.co.uk/2015/12/filterpedia-core-image-filter-explorer.html (fetched 2026-08-29T10:19:05.547875+00:00, sha 246f988daf1f)
- Data as of 2026-08-30T08:39:29.467469+00:00.