Nonlinear Image Filtering

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Nonlinear filters can be used for smoothing as well as for eliminating noise in image processing. This Demonstration shows the effectiveness of using different nonlinear filters against the type of noise added to the image. The size of the mask can also be manipulated to control the degree of smoothing and noise removal.

Contributed by: José A. Díaz (November 2011)
Open content licensed under CC BY-NC-SA




[1] R. C. Gonzales and R.E. Wood, Digital Image Processing, Reading, MA: Addison-Wesley, 2008.

[2] M. Kuwahara, K. Hachimura, S. Eiho, and M. Kinoshita, Digital Processing of Biomedical Images, New York: Plenum Press, 1976.

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