Friday, May 5, 2023

 

VLSI design of median filter

Filters are linear systems employed for removal of noise from useful signals. Conventional IIR filters and FIR filters are highly envolved. In general They are computional algorithms requiring definite delay between input and the outputs. However long tailed noise such as exponentional and laplasion distribution noise are difficult to remove using conventional linear filters.

Median filters are a class of non linear filters having advantages

1.   Capability to remove long tailed noise

2.   Capability to preserve edge information

 

The most desirable property of median filters is that they are based on signal “sorting and selection operations”. No Computation is involved. Therefore, they are the most suitable for real time VLSI.

Uses

1.   Image processing

2.   Communication networks

 

 

 

 

 

 

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