Robust non-local median filter

Matsuoka, Jyohei; Koga, Takanori; Suetake, Noriaki; Uchino, Eiji

doi:10.1007/s10043-016-0299-2

Cited by 6 publications

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

The combined effect of fractures and mineral content on coal hydromechanical response

Bahaaddini

Masoumi

et al. 2022

Bull Eng Geol Environ

View full text Add to dashboard Cite

The hydromechanical behaviour of fractured coal is a complex function of interaction between coal bulk and fracture deformation driven by fluid pressure and external stress. Despite the research studies conducted to date, the combined effect of mineral content and fracture structure on hydromechanical behaviour of sorptive fractured coal remains unexplored. To study this combined effect, we performed a series of X-ray computed tomography (XRCT) imaging on a range of coal specimens with non-sorbing (helium) and sorbing (CO2) gases at different effective stress paths using a newly developed X-ray transparent triaxial system. The compressibility of system components was obtained from processed 3D XRCT images which were used to interpret the results. The results of this study show that coal matrix/solid compressibility has a positive nonlinear relation with mineral content irrespective of mineral type. Effective stress coefficient is also a strong function of both mineral content and fracture porosity. Furthermore, the increase in mineral content leads to less fracture opening by an increase in helium pressure. Interestingly, the effect of mineral content on the bulk strength of coal is more significant than the effect of fracture porosity. Finally, coal with more open fractures shows less bulk swelling by gas adsorption under external stress due to damping effect of fracture volume on developed internal volumetric swelling strain.

show abstract

The combined effect of fractures and mineral content on coal hydromechanical response

Bahaaddini

Masoumi

et al. 2022

Bull Eng Geol Environ

View full text Add to dashboard Cite

show abstract

Nondestructive Evaluation of the Isolated Pore Spatial Distribution State in a Special-Shaped C/SiC Composite Component

Qu,

Wen,

et al. 2023

J Nondestruct Eval

View full text Add to dashboard Cite

Seismic random noise attenuation based on adaptive nonlocal median filter

Liu

Guo

Liu

et al. 2022

Journal of Geophysics and Engineering

View full text Add to dashboard Cite

The accurate image of underground medium is determined by the quality of the seismic data, which can be improved by random noise attenuation and structural continuity enhancement. We proposed an adaptive nonlocal median filter that can protect geological structure while attenuating random noise. We combine the nonlocal idea with the weighted median filter and design the appropriate weights of the nonlocal median filter based on seismic data characteristics. The local structure is represented by the neighborhood around the center point. The directional difference of spatial vectors in the neighborhood is considered when computing the similarity. According to the local dip attribute of seismic data, the anisotropic Gaussian window is adaptively adjusted to increase the constraint along the structural direction. The proposed method can search more precisely for points with similar local structure to the filtered points and effectively attenuate seismic random noise. The continuity of events is enhanced while the goal of protecting fault information is achieved. The experimental results of the theoretical model and field data show that the adaptive nonlocal median filter can strike a balance between preserving structure information and attenuating seismic random noise.

show abstract

Robust non-local median filter

Cited by 6 publications

References 21 publications

The combined effect of fractures and mineral content on coal hydromechanical response

The combined effect of fractures and mineral content on coal hydromechanical response

Nondestructive Evaluation of the Isolated Pore Spatial Distribution State in a Special-Shaped C/SiC Composite Component

Seismic random noise attenuation based on adaptive nonlocal median filter

Contact Info

Product

Resources

About