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Extracting Pi from Image Data

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In 1881, Ernesto Cesàro [1] proved that the probability that two random integers are relatively prime is . In this Demonstration, the pairs of random integers are chosen from among the pixel values of selected images.

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Using enough random pairs of pixel data from almost any sufficiently complex picture gives an approximation of with between 1 and 4 correct digits.

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Contributed by: Erik Mahieu (February 2013)
Open content licensed under CC BY-NC-SA

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Reference

[1] B. Gourevitch. "The World of Pi: Cesaro." (March 14, 2012) www.pi314.net/eng/cesaro.php.

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