scholarly journals Frequency-domain-based switching median filter for the restoration of images corrupted with high-density periodic noise

2017 ◽  
Vol 24 (3) ◽  
pp. 1312-1324
Author(s):  
J. Varghese
Keyword(s):  
Frequency Domain ◽  
Median Filter ◽  
High Density ◽  
Periodic Noise ◽  
Switching Median Filter

scholarly journals Comparative analysis of Median filter family for Removing High-Density Noise in Magnetic Resonance Images

2019 ◽  
pp. 2246-2256
Author(s):  
Nada Jasim Habeeb
Keyword(s):  
Comparative Analysis ◽  
Magnetic Resonance ◽  
Impulse Noise ◽  
Median Filter ◽  
Similarity Index ◽  
Noise Removal ◽  
Magnetic Resonance Images ◽  
High Density ◽  
Switching Median Filter ◽  
Filter Noise

Magnetic Resonance Imaging (MRI) is a medical indicative test utilized for taking images of the tissue points of interest of the human body. During image acquisition, MRI images can be damaged by many noise signals such as impulse noise. One reason for this noise may be a sharp or sudden disturbance in the image signal. The removal of impulse noise is one of the real difficulties. As of late, numerous image de-noising methods were produced for removing the impulse noise from images. Comparative analysis of known and modern methods of median filter family is presented in this paper. These filters can be categorized as follows: Standard Median Filter; Adaptive Median Filter; Progressive Switching Median Filter; Noise Adaptive Fuzzy Switching Median Filter; and Different Applied Median Filter. The de-noising technique performance for each one is evaluated and compared using Peak Signal Noise Ratio, Structural Similarity index Metric, and Beta metric as quantitative metrics.  The experimental results showed that the latest de-noising technique, Different Applied Median Filter (DAMF), produced better results in removing impulse noise compared with the other de-noising techniques. However, this filter produced de-noised image with nonlinear edges in high-density noise. As a result, noise removal from images is one of the low-level images processing which is considered as a first step in many image applications. Therefore, the efficiency of any image processed depends on the efficiency of noise removal technique.

Using Sorted Switching Median Filter to remove high-density impulse noises

2013 ◽  
Vol 24 (7) ◽  
pp. 956-967 ◽  
Author(s):  
Shi-Jinn Horng ◽  
Ling-Yuan Hsu ◽  
Tianrui Li ◽  
Shaojie Qiao ◽  
Xun Gong ◽  
...  
Keyword(s):  
Median Filter ◽  
High Density ◽  
Switching Median Filter

Iterative Adaptive Switching Median Filter

2006 ◽  
Author(s):  
Krishnan Nallaperumal ◽  
Justin Varghese ◽  
S. Saudia ◽  
S. Annam ◽  
P. Kumar
Keyword(s):  
Median Filter ◽  
Switching Median Filter
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