Median Image Filter David Newman Nick Govier. Overview Purpose of Filter Implementation Demo Questions ??

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Presentation transcript:

Median Image Filter David Newman Nick Govier

Overview Purpose of Filter Implementation Demo Questions ??

Purpose Removes “ Salt & Pepper ” Noise Will not remove Gaussian Noise –Use Gaussian Smoothing Side Effects –Detail is lost –Border pixels are lost

Implementation (1) Use a Template –Of size 3x3, 5x5, 7x7, … etc. Sort the values in the template –We used merge sort Middle value of sorted list replaces the template ’ s central pixel.

Implementation (2) N.B. Each template takes the values its sorts from the original image

Demo Implemented as a Java Applet Can be viewed at “ MedianFilter.html ”

Questions ??