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Photographic Contrast Masks Using Cellular Automata

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Contrast masks are commonly used to adjust the tone of specific areas of a photograph. The mask in this Demonstration is generated by a two-dimensional cellular automaton using a binarized version of the photograph as initial condition.

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You can choose different resolutions and a different binarizing threshold. Different rules generate a variety of mask patterns. Increasing the steps makes the mask grow in size.

The adjusted photograph is made by blending the original with the mask. Setting the blending fraction to 0 shows the original photograph. Setting the blending fraction to 1 shows the mask only.

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Contributed by: Erik Mahieu (May 2012)
Open content licensed under CC BY-NC-SA

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Snapshot 1 shows the mask used in the thumbnail. The other masks can be displayed by setting the blending fraction slider to 1.

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