Unsharp Masking is a popular image processing technique used for improving the sharpness of structures on dental radiographs. However, it produces overshoot artefact and intolerably amplifies noise. On radiographs, often resembles indications prosthesis misfit, pathosis, pathological features associated with restorations. A noise- robust alternative to algorithm, termed Gradient-adaptive Nonlin...

Monitoring open water bodies accurately is an important and basic application in remote sensing. Various water body mapping approaches have been developed to extract water bodies from multispectral images. The method based on the spectral water index, especially the Modified Normalized Difference Water Index (MDNWI) calculated from the green and Shortwave-Infrared (SWIR) bands, is one of the mo...

Multitemporal analysis of very high resolution images has gained an ever increasing attention due to the availability of several satellite platforms with different spectral and geometrical resolutions and revisit times. The last generation of multispectral sensors (e.g., Quickbird, Ikonos, SPOT-5) can acquire a panchromatic (Pan) image characterized by a very high geometrical resolution and a s...

Nonlinear transmission lines with ferrite have been actively developed and studied for about two decades. At the same time, first works on this topic date back to middle of last century. find their application in various problems electrophysics, greatest being found pulse sharpening, as delay generators high-power pulses microwave radiation. The main scientific technical results development tec...

This study conducts an exploratory evaluation of the performance of the newly available Sentinel-2A Multispectral Instrument (MSI) imagery for mapping water bodies using the image sharpening approach. Sentinel-2 MSI provides spectral bands with different resolutions, including RGB and Near-Infra-Red (NIR) bands in 10 m and Short-Wavelength InfraRed (SWIR) bands in 20 m, which are closely relate...

PURPOSE Contrast, sharpness, enhancement, and density can be changed in digital systems. The important question is to what extent the changes in these variables affect the accuracy of caries detection. MATERIALS AND METHODS Forty eight extracted human posterior teeth with healthy or proximal caries surfaces were imaged using a photostimulable phosphor (PSP) sensor. All original images were pr...

The major disadvantage of hierarchical clustering in fMRI data analysis is that an appropriate clustering threshold needs to be specified. Upon grouping data into a hierarchical tree, clusters are identified either by specifying their number or by choosing an appropriate inconsistency coefficient. Since the number of clusters present in the data is not known beforehand, even a slight variation ...