Making Joint-Histogram-Based Weighted Median Filter Much Faster

Hanhoon PARK  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E98-D   No.3   pp.721-725
Publication Date: 2015/03/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2014EDL8144
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
Keyword: 
weighted median filter,  joint-histogram,  color or intensity variation,  Sobel operator,  

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Summary: 
In this letter, we propose a simple framework for accelerating a state-of-the-art histogram-based weighted median filter at no expense. It is based on a process of determining the filter processing direction. The determination is achieved by measuring the local feature variation of input images. Through experiments with natural images, it is verified that, depending on input images, the filtering speed can be substantially increased by changing the filtering direction.