Chernoff face

Chernoff faces, invented by applied mathematician, statistician, and physicist Herman Chernoff in 1973, display multivariate data in the shape of a human face. The individual parts, such as eyes, ears, mouth, and nose, represent values of the variables by their shape, size, placement, and orientation. The idea behind using faces is that humans readily recognize them and notice small changes. Chernoff faces handle each variable differently. Because the features of the faces vary in perceived importance, the way variables are mapped to features should be carefully chosen (e.g., eye size and eyebrow slant have been found to carry significant weight). Robert J. K. Jacob used Chernoff faces to encode multivariate data for rapid visual parsing.

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