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Design of some 2-D filters through the transformation technique

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2 Author(s)
V. L. Narayana Murthy ; NCore Tech. Pvt. Ltd., Bangalore, India ; A. Makur

The transformation technique is a powerful tool for designing 2-D FIR filters. However, it is not useful for the design of specially shaped filters with passband/stopband regions not centred around the origin. The authors extend this technique to design two types of filters. A notch filter has a stopband centred about a small region in the 2-D frequency plane. The authors propose an extension to the transformation technique with the windowing concept to achieve the design of notch filters. A directional filter has a passband extending fully along a straight line passing through the origin. The transformation technique is further extended to yield such directional filters. Design and application examples for both these filters are also presented

Published in:

IEE Proceedings - Vision, Image and Signal Processing  (Volume:143 ,  Issue: 3 )