K-means clustering algorithm

[kay meens KLUSS-tuh-ring] /keɪ miːnz ˈklʌst(ə)rɪŋ/

An algorithm used to reduce a set of numbers to a group of clusters. When applied to an image, it can create a summary of the colours that make up that image i.e. a colour palette. This technique was used in the ManIIIFestor browser extension project to create a relevant background gradient for every copyright-free image.