Block median filters

Qurban A. Memon; Takis Kasparis

doi:10.1117/12.211993

16 June 1995 Block median filters

Qurban A. Memon, Takis Kasparis

Proceedings Volume 2488, Visual Information Processing IV; (1995) https://doi.org/10.1117/12.211993
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

Rank and median filters (MFs) have become one of the standard techniques for suppressing noise of impulsive nature. A limitation of these filters is the high computational cost when implemented on general purpose computers. Several fast algorithms have been developed for specific types of signals. An alternative is computationally more efficient filters with MF-like performance. One proposed filter in this category with selectable trade-off between reduction of computation and MF-like performance is the block median filter (BMF). The BMF produces a median block at each window position, thus effectively reducing the total window steps and the computation. In this paper some statistical properties of the BMF and comparisons with the MF are presented. It is shown that for large window sized, the statistical properties of the BMF approach those of the MF.

Citation Download Citation

Qurban A. Memon and Takis Kasparis "Block median filters", Proc. SPIE 2488, Visual Information Processing IV, (16 June 1995); https://doi.org/10.1117/12.211993

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