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In this work, a novel nonlinear filter, called tri-state median (TSM) filter, is proposed for preserving image details while effectively suppressing impulse noise. We incorporate the standard median (SM) filter and the center weighted median (CWM) filter into a noise detection framework to determine whether a pixel is corrupted, before applying filtering unconditionally. Extensive simulation re...

The vector median filter(VMF) is a useful and common tool for noise removal in color image processing[HPP04,PV00,AHN90]. The drawback of the approach in its general form is the high computational cost. Indeed it takes O(n×m×ms) distance evaluations for computing the filter response, where ms ist the mask size and n×m the dimension of the image. In this contribution we propose a general algorith...

In many applications user authentication has to be carried out by portable devices. These kinds of devices must deal with constraints like computational performance, power consumption while also maintaining high performance rates in the authentication process. This paper provides solutions to designing such personal tokens where biometric authentication is required. In this paper, a 3D median f...

This paper describes a new filter for impulse noise reduction in colour images which is aimed at improving the noise reduction capability of the classical vector median filter. The filter is inspired by the application of a vector marginal median filtering process over a selected group of pixels in each filtering window. This selection, which is based on the vector median, along with the applic...

In this paper, a new nonlinear median based filtering technique is introduced for the enhancement of medical images that are highly contaminated by impulse noise. The proposed Detail Preserving Fast Median Filtering (DPFMF) technique is more effective in eliminating fixed value impulse noise and preserving the image details. The filter replaces a corrupted pixel by the median value of the fast ...