A REAL-TIME 2-D MEDIAN BASED FILTER FOR VIDEO SIGNALS

A 2-D median based filter for real-time video signal processing is pre sented. The device is able to remove impulse and missing line noise in real-time without blurring sharp video images. A prototype using 75 s tandard TTL chips was realized on one single speedwire prototype board of size 17x30 cm2 and its structure is suitable for VLSI implementati on. The statistical performance of the non-linear filter was also inve stigated and compared with standard 2-D median filters. It is shown th at the filter has superior characteristics to its median based counter parts while the hardware implementation is much simpler.