نتایج جستجو برای: noise removal

تعداد نتایج: 332539  

Journal: :journal of computer and robotics 0
afsaneh jalalian department of computer and communication systems engineering, faculty of engineering, universiti putra, malaysia babak karasfi faculty of computer and information technology engineering, qazvin branch, islamic azad university, qazvin, iran khairulmizam samsudin department of computer and communication systems engineering, faculty of engineering, universiti putra, malaysia m.iqbal saripan department of computer and communication systems engineering, faculty of engineering, universiti putra, malaysia syamsiah mashohor department of computer and communication systems engineering, faculty of engineering, universiti putra, malaysia

noise removal operation is commonly applied as pre-processing step before subsequent image processing tasks due to the occurrence of noise during acquisition or transmission process. a common problem in imaging systems by using cmos or ccd sensors is appearance of  the salt and pepper noise. this paper presents cellular automata (ca) framework for noise removal of distorted image by the salt an...

Afsaneh Jalalian, Babak Karasfi, Khairulmizam Samsudin M.Iqbal Saripan Syamsiah Mashohor

Noise removal operation is commonly applied as pre-processing step before subsequent image processing tasks due to the occurrence of noise during acquisition or transmission process. A common problem in imaging systems by using CMOS or CCD sensors is appearance of  the salt and pepper noise. This paper presents Cellular Automata (CA) framework for noise removal of distorted image by the salt an...

Journal: :journal of biomedical physics and engineering 0
s abbaspour department of biomedical engineering, amirkabir university of technology, tehran, iran a fallah department of biomedical engineering, amirkabir university of technology, tehran, iran

0

Journal: :journal of biomedical physics and engineering 0
s. abbaspour a. fallah

background: the electrocardiogram artifact is a major contamination in the electromyogram signals when electromyogram signal is recorded from upper trunk muscles and because of that the contaminated electromyogram is not useful. objective: removing electrocardiogram contamination from electromyogram signals. methods: in this paper, the clean electromyogram signal, electrocardiogram artifact and...

2001
Igor Guskov Zoë J. Wood

Meshes obtained from laser scanner data often contain topological noise due to inaccuracies in the scanning and merging process. This topological noise complicates subsequent operations such as remeshing, parameterization and smoothing. We introduce an approach that removes unnecessary nontrivial topology from meshes. Using a local wave front traversal, we discover the local topologies of the m...

Journal: :Technological and Economic Development of Economy 2017

Journal: :ASEG Extended Abstracts 2003

In this paper, unique approach is presented for the electroencephalography (EEG) signals analysis. This is based on Eigen values distribution of a matrix which is called as scaled Hankel matrix. This gives us a way to find out the number of Eigen values essential for noise reduction and extraction of signal in singular spectrum analysis. This paper gives us an approach to classify the EEG signa...

Removing salt and pepper noise is an active research area in image processing. In this paper, a two-phase method is proposed for removing salt and pepper noise while preserving edges and fine details. In the first phase, noise candidate pixels are detected which are likely to be contaminated by noise. In the second phase, only noise candidate pixels are restored using adaptive median filter. In...

2009
E. B. Beall M. J. Lowe

Introduction: It has become common to correct for physiologic noise by prior regression [1] or by inclusion in the fit model for BOLD-weighted functional connectivity (fcMRI) and in some cases, for fMRI[2-4]. The noise model is based on the RETROICOR model [5,1], which removes variance with the same quasiperiodicity as the cardiac and respiratory cycles. However, to model the noise accurately, ...

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