Morphological and Median Adaptive Filters Based on LCBP Rank Filter

Abstract

The presented median and morphological (min and max) filters based on low complexity bit-pipeline (LCBP) rank filter provide reduced complexity of required processing hardware, due to similar pipeline stages and the complete absence of sorting networks in comparison with other solutions. FPGA realization of bit-pipeline median and morphological filter and adaptive bit-pipeline rank filter according to this paper provides significantly higher maximum operating frequency and much smaller used chip resources in comparison with state-of-the-art sorting methods.

Keywords

• Median filters
• morphological filters
• adaptive filters
• pipeline processing
• FPGA implementation