scholarly journals An effective weighted vector median filter for impulse noise reduction based on minimizing the degree of aggregation

2020 ◽  
Author(s):  
Xiangxi Meng ◽  
Tongwei Lu ◽  
Feng Min ◽  
Tao Lu
Keyword(s):  
Noise Reduction ◽  
Impulse Noise ◽  
Median Filter ◽  
Vector Median

Robust vector median filtering with a structure-adaptive implementation

Geophysics ◽  
2020 ◽  
Vol 85 (5) ◽  
pp. V407-V414
Author(s):  
Yanghua Wang ◽  
Xiwu Liu ◽  
Fengxia Gao ◽  
Ying Rao
Keyword(s):  
Seismic Data ◽  
Impulse Noise ◽  
Reservoir Characterization ◽  
Median Filter ◽  
Original Data ◽  
Thin Layers ◽  
3D Seismic ◽  
Data Set ◽  
Vector Median ◽  
3D Seismic Data

The 3D seismic data in the prestack domain are contaminated by impulse noise. We have adopted a robust vector median filter (VMF) for attenuating the impulse noise from 3D seismic data cubes. The proposed filter has two attractive features. First, it is robust; the vector median that is the output of the filter not only has a minimum distance to all input data vectors, but it also has a high similarity to the original data vector. Second, it is structure adaptive; the filter is implemented following the local structure of coherent seismic events. The application of the robust and structure-adaptive VMF is demonstrated using an example data set acquired from an area with strong sedimentary rhythmites composed of steep-dipping thin layers. This robust filter significantly improves the signal-to-noise ratio of seismic data while preserving any discontinuity of reflections and maintaining the fidelity of amplitudes, which will facilitate the reservoir characterization that follows.

Combination of adaptive vector median filter and weighted mean filter for removal of high-density impulse noise from colour images

2017 ◽  
Vol 11 (6) ◽  
pp. 352-361 ◽  
Author(s):  
Amarjit Roy ◽  
Joyeeta Singha ◽  
Lalit Manam ◽  
Rabul Hussain Laskar
Keyword(s):  
Impulse Noise ◽  
Median Filter ◽  
High Density ◽  
Weighted Mean ◽  
Mean Filter ◽  
Vector Median
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