نتایج جستجو برای: geological noise removing

تعداد نتایج: 251754  

2016
R. Padma K.Satya Prasad

In this paper we mainly focused on medical image qualities .Super resolution is a process of improve the quality of image by consider poor qualities of same image frames. High quality medical images were requiring for perfect analysis and diagnosis .This work is concentrated for single image defect. We propose a learning based method for denoising and super resolution of medical images. The res...

1997
John Smith

In the last ten years, the use of gamma-ray spectrometry for geological mapping and mineral exploration has shown considerable growth. With this growth, standardized procedures have been developed for the calibration and processing of the airborne measurements so that they will be independent of survey parameters. This paper describes some of the new developments to convert airborne data to gro...

2001
W. E. Featherstone

The geoid is the fundamental surface that defines the figure of the Earth. It is approximated by mean sealevel and undulates due to spatial variations in the Earth's gravity field. The use of the geoid in regional geophysics is illustrated for the North-West Shelf of Australia by removing long-wavelength geoid features, due predominantly to deep-Earth mass anomalies, in order to reveal near-sur...

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 2003

Hysteresis current control method is vastly used in PWM inverters because of simplicity in performance, fast control response and good ability in limiting peak current. However, switching frequency in hysteresis current control method with fixed bandwidth has large variation during a cycle and therefore causes non-optimal current ripple generation in output current. One of basic problems in imp...

2009
Harold Phelippeau Mohamed Akil Breno Dias Rodrigues Hugues Talbot Stefan Bara

Digital cameras are now commonly included in several digital devices such as mobile phones. They are present everywhere and have become the principal image capturing tool. Inherent to light and semiconductors properties, sensor noise [10] continues to be an important factor of image quality [12], especially in low light conditions. Removing the noise with mathematical solutions appears thus una...

2015
K. Subbulakshmi A. Geetha

Image preprocessing is the technique of enhancing data images prior to computational processing. Over the past two decades, studies of photographic images represented with multi-scale multi-orientation image decompositions (loosely referred to as “wavelets”) have revealed striking nonGaussian regularities and inter and intra-subband dependencies. In this paper we propose a new fast and efficien...

Journal: :Journal of Electronic Imaging 2021

Patch-based approaches such as 3D block matching (BM3D) and non-local Bayes (NLB) are widely accepted filters for removing Gaussian noise from single-frame images. In this work, we propose three extensions these when there exist multiple frames of the same scene. The first them employs reference patches on every frame instead a commonly used single method, thus utilizing complete available info...

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