A hardware-oriented design for weighted median filters

Abstract

In this paper, the design consideration and algorithm mapping for weighted median filters are presented. To achieve high throughput rate, a special coding technique and its dedicated architecture with block processing are constructed to handle multiple filtering inputs and outputs concurrently. The pipelined cycle in our design has the delay time of 1-bit carry-save-adder (CSA). Due to this design strategy, the proposed architecture can support not only weighted median filters but also rank order-based filters in high-speed applications.