Nyquist Criteria, Aliasing and Dithering

The mathematical basis of sampling was set forth by Harry Nyquist of Bell Telephone Laboratories in two classic papers published in 1924 and 1928, respectively. Nyquist's original work was shortly supplemented by R. V. L. Hartley. [1]

Dithering

 

Dithering

 

Figure. Color Dithering [2]

[1]    Walt Kester. Fundamentals of Sampled Data Systems Analog Devices. [Online]. http://www.analog.com/library/analogdialogue/archives/39-06/Chapter%202%20Sampled%20Data%20Systems%20F.pdf

[2]   Wikipedia http://en.wikipedia.org/wiki/Color_banding

 

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