Idée Labs has created a useful set of online image search tools, including a multicolor search that allows you to filter images using a palette of up to ten colors. Using a spectrum color selector, you can pick the colors you are looking for and it will return only photos that contain those colors.
Multicolr Search Lab
With the Multicolr Search Lab you are able to search up to ten different colors from a palette of 120 different shades. The search will filter through three million ‘interesting’ flickr photos or three million Alamy stock photos.
BYO Image Search
Idée has also created a visual search. The BYO (Bring Your Own) Image Search Lab allows you to upload an image or enter the URL of one on the internet and find similar looking images from their Alamy collection. Their algorithm looks over one hundred image attributes, such as color, shape, texture, luminosity, complexity, objects, and regions, when doing similarity searching. You may see images in your search results which do not look like the query image overall, but they probably strongly share a few characteristics in particular.
Visual Search Lab
The Visual Search Lab combines a keyword search with a visual search. You can select an image to find visually similar images then further refine with keywords, or the other way around. Unfortunately, like the BYO Search, it only works for Alamy and not flickr.
Taken from http://www.colourlovers.com/web/blog/2008/07/23/idee-labs-multicolr-search-lab
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