Choose a more suitable indexed image archive
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davidfoerster commented
Chromatik doesn't appear to be a reliable image index, because of the lack of support by its operator Exalead. Possible alternatives are:
- Flickr
- well supported and reliable
- only 16 colours available and multiple colours per query (undocumented, but available)
- search by (visual) types and categories (undocumented, but available)
- Imagga multi-colour search
- not yet available, but free access, as soon as testing begins
- intelligent colour clustering
- full RGB range, up to 5 weighted colours per query
- can distinguish between foreground and background colours
- Picturelicious
- requires self-hosting
- only clandestine image archive use readily available
- very simple indexing approach, no clustering
- full RGB range and an arbitrary amount of colours per query