نتایج جستجو برای: noising

تعداد نتایج: 1191  

2013
Yogesh Sharma Anurag Shrivastava

us noises encountered in ECG during the recording process. In this paper an -noising of ECG signal where any additional sed as reference signal. Delayed version of

Journal: :iranian journal of medical physics 0
farshid babapour mofrad ph.d., candidate, faculty of engineering, science and research branch, islamic azad university, tehran, iran ali abbaspour tehrani-fard assistant professor, faculty of engineering, science and research branch, islamic azad university, tehran, iran babak ebrahimi m.sc., faculty of engineering, science and research branch, islamic azad university, tehran, iran dariush sardari assistant professor, faculty of engineering, science and research branch, islamic azad university, tehran, iran

introduction: spect is a diagnostic imaging technique the main disadvantage of which is the existence of poisson noise. so far, different methods have been used by scientists to improve spect images. the wavelet transform is a new method for de-noising which is widely used for noise reduction and quality enhancement of images. the purpose of this paper is evaluation of noise reduction in spect ...

Journal: :J. Visual Communication and Image Representation 2013
Sudipto Dolui Alan Kuurstra Iván C. Salgado Patarroyo Oleg V. Michailovich

Magnetic resonance imaging (MRI) is a principal modality of modern medical imaging, which provides a wide spectrum of useful diagnostic contrasts, both anatomical and functional in nature. Like many alternative imaging modalities, however, some specific realizations of MRI offer a trade-off in terms of acquisition time, spatial/temporal resolution and signal-to-noise ratio (SNR). Thus, for inst...

2013
B. B. S. Kumar P. S. Satyanarayana

With the growth of the multimedia technology over the past decades, the demand for digital information has increased dramatically. This enormous demand poses difficulties for the current technology to handle. One approach to overcome this problem is to compress the information by removing the redundancies present in it. This is the lossy compression scheme that is often used to compress informa...

Journal: :Medical physics 2002
Joseph O Deasy M Victor Wickerhauser Mathieu Picard

The Monte Carlo dose calculation method works by simulating individual energetic photons or electrons as they traverse a digital representation of the patient anatomy. However, Monte Carlo results fluctuate until a large number of particles are simulated. We propose wavelet threshold de-noising as a postprocessing step to accelerate convergence of Monte Carlo dose calculations. A sampled rough ...

Journal: :AL-Rafidain Journal of Computer Sciences and Mathematics 2012

Journal: :International Journal of Intelligent Computing and Information Sciences 2021

Journal: :International Journal of Cognitive Informatics and Natural Intelligence 2021

Using satellite imagery and remote sensing data for supervised self-supervised learning problems can be quite challenging when parts of the underlying datasets are missing due to natural phenomena (clouds, fog, haze, mist, etc.). Solving this problem will improve augmentation make use it in a world where represents great resource exploit any big pipeline setup. In paper, authors present generat...

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