نتایج جستجو برای: pass fourier filtering

تعداد نتایج: 166691  

Journal: :IEEE Signal Processing Letters 2018

The trans-admittance-mode (TAM) might act as a transforming bridge for voltage-mode to current-mode conversion. In this study a new low voltage operated electronically tunable TAM biquad filter structure realizing all the seven standard filtering functions namely; low-pass (LP), band-pass (BP), high-pass (HP), regular-notch (RN), low-pass-notch (LPN), high-pass-notch (HPN) and all-pass (AP) fro...

Journal: :iranian journal of medical physics 0
a. boroomand m.sc. in biomedical engineering, tehran university of medical sciences, tehran, iran a. ahmadian associate professor, physics and biomedical engineering dept., tehran university of medical sciences, tehran, iran research center for science & technology in medicine, imam khomeini hospital, tehran, iran m.a. oghabian associate professor, physics and biomedical engineering dept., tehran university of medical sciences, tehran, iran

introduction: the accuracy of analyzing functional mri (fmri) data is usually decreases in the presence of noise and artifact sources. a common solution in for analyzing fmri data having high noise is to use suitable preprocessing methods with the aim of data denoising. some effects of preprocessing methods on the parametric methods such as general linear model (glm) have previously been evalua...

2003
Rafael Navarro Javier Portilla Antonio Tabernero

In this work we demonstrate the relationship existing between two important issues in vision: multi-scale local spectrum analysis, and log-polar foveatization. We show that, when applying a continuous set of self-similar (rotated and scaled) band-pass filters to estimate the local spectrum at a given point of attention of the image, the inverse Fourier transform of this local spectrum is a log-...

A. Ahmadian A. Boroomand M.A. Oghabian

Introduction: The accuracy of analyzing Functional MRI (fMRI) data is usually decreases in the presence of noise and artifact sources. A common solution in for analyzing fMRI data having high noise is to use suitable preprocessing methods with the aim of data denoising. Some effects of preprocessing methods on the parametric methods such as general linear model (GLM) have previously been evalua...

2012
Artiom Kovnatsky Michael M. Bronstein Alexander M. Bronstein

The rapid development of 3D acquisition technology has brought with itself the need to perform standard signal processing operations such as filters on 3D data. It has been shown that the eigenfunctions of the Laplace-Beltrami operator (manifold harmonics) of a surface play the role of the Fourier basis in the Euclidean space; it is thus possible to formulate signal analysis and synthesis in th...

Journal: :The Journal of the Institute of Television Engineers of Japan 1973

Journal: :IEEE Transactions on Knowledge and Data Engineering 2022

Graph convolutional networks are becoming indispensable for deep learning from graph-structured data. Most of the existing graph share two big shortcomings. First, they essentially low-pass filters, thus potentially useful middle and high frequency band signals ignored. Second, bandwidth filters is fixed. Parameters a filter only transform inputs without changing curvature function. In reality,...

Journal: :JTIM : Jurnal Teknologi Informasi dan Multimedia 2019

Journal: :Applied sciences 2021

Generating new motion parallax holograms is required for holographic head-mounted displays when the head moves. Additionally, it hologram generation from light field data that consist of a number images. However, re-rendering three-dimensional (3D) scenes and re-calculating are computationally complex. Therefore, we propose strategy with different an existing without 3D holograms. The proposed ...

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