Results 21 to 30 of about 673,965 (277)
Neural Network System for Recognizing Images Affected by Random-Valued Impulse Noise
Applied Sciences, 2023 Images taken with different sensors and transmitted through different channels can be noisy. In such conditions, the image most often suffers from random-valued impulse noise.
Anzor Orazaev +3 more
doaj +1 more source
On Estimating the QSO Transmission Power Spectrum [PDF]
, 2000 We present new methods to minimize the systematic and random errors for measuring the transmission power spectrum from the Lyman-alpha forest. Sources of systematic errors explored include metal line contamination and continuum-fitting.
Burles, Scott +5 more
core +2 more sources
PIMA-CT: Physical Model-Aware Cyclic Simulation and Denoising for Ultra-Low-Dose CT Restoration
Frontiers in Radiology, 2022 A body of studies has proposed to obtain high-quality images from low-dose and noisy Computed Tomography (CT) scans for radiation reduction. However, these studies are designed for population-level data without considering the variation in CT devices and
Peng Liu +11 more
doaj +1 more source
Impulsive noise removal image ehancement technique [PDF]
International Journal on Intelligent Electronic Systems, 2007 Several areas like remote sensing, biomedical analysis, and computer vision require good image contrast and details for better interpretations and diagnoses’s. In the literature various image enhancement algorithms have been proposed to improve the perceptual aspects of the image for poorly contrasted images.
Subrajeet Mohapatra +2 more
openaire +1 more source
HOS-based image sequence noise removal [PDF]
IEEE Transactions on Image Processing, 2006 In this paper, a new spatiotemporal filtering scheme is described for noise reduction in video sequences. For this purpose, the scheme processes each group of three consecutive sequence frames in two steps: 1) estimate motion between frames and 2) use motion vectors to get the final denoised current frame.
El Hassouni, M. +2 more
openaire +3 more sources
Noise and aliases in off-axis and phase-shifting holography [PDF]
, 2008 We have compared the respective efficiencies of off-axis and phase-shifting holography in terms of noise and aliases removal. The comparison is made by analyzing holograms of an USAF target backlit with laser illumination, recorded with a charge-coupled ...
Ansari +26 more
core +2 more sources
Origin and Application of the Twinned Calcite Strain Gauge
Geosciences, 2021 This paper is a personal account of the origin and development of the twinned-calcite strain gauge, its experimental verification, and its relationship to stress analysis.
Richard H. Groshong
doaj +1 more source
Noise removal from multiple MRI images [PDF]
Journal of Digital Imaging, 1994 We introduce a novel technique for magnetic resonance image (MRI) restoration, using a physical model (spin equation). We determine a set of three basis images (proton density and nuclear relaxation times) from the MRI data using a nonlinear optimization method, and use those images to obtain restorations of the original image.
S J, Garnier +3 more
openaire +2 more sources
Towards a Guideline for UAV-Based Data Acquisition for Geomorphic Applications
Remote Sensing, 2023 Recent years have seen a rapid rise in the generation of high-resolution topographic data using custom-built or commercial-grade Unmanned Aerial Vehicles (UAVs).
Dipro Sarkar +2 more
doaj +1 more source
Video enhancement using adaptive spatio-temporal connective filter and piecewise mapping [PDF]
, 2008 This paper presents a novel video enhancement system based on an adaptive spatio-temporal connective (ASTC) noise filter and an adaptive piecewise mapping function (APMF).
A Polesel +31 more
core +4 more sources