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Application of improved morphological filter to the extraction of impulsive attenuation signals

Jing Wang, Guanghua Xu, Qing Zhang, Lin Liang
2009 Mechanical systems and signal processing  
Firstly, an average weighted combination of open-closing and close-opening morphological operator, which eliminates statistical deflection of amplitude, is utilized to extract impulsive component from  ...  In this paper, we propose an improved morphological filter for feature extraction of the above signals in the time domain.  ...  Acknowledgment This work was supported by the National Natural Science Foundation of PR China (approval no. 50335030).  ... 
doi:10.1016/j.ymssp.2008.03.012 fatcat:a4bdcmmvqvaxbpkslkxalf6h7y

Automation of ECG heart beat detection using Morphological filtering and Daubechies wavelet transform

Gayani K.S
2014 IOSR Journal of Engineering  
MM uses its hybrid opening-closing operations for impulsive noise suppression and baseline wander removal. Daubechies3 WT is used for signal analysis since it has a shape similar to the ECG signal.  ...  A novel QRS detection algorithm based on Mathematical Morphological (MM) filtering and Daubechies wavelet transform has been developed in this work.  ...  Algorithm for Noise suppression and Baseline wander removal Morphological technique uses a sequence of opening and closing operations on the digitized data for Noise suppression and Baseline wander removal  ... 
doi:10.9790/3021-041215358 fatcat:xhfmpmejtbdlxfsti7mn2ef2si

Time-course Observation of Patients with Arthrosis of the Temporomandibular Joint on MRI

Naoki Maeda, Hidehiko Hosoki, Midori Yoshida, Hideki Suito, Oyunbat Dashpuntsag, Fumihiro Matsumoto, Yoshizo Matsuka, Eiji Tanaka, Eiichi Honda
2018 Journal of oral health and biosciences  
In addition, the articular disc position in the closed or open mouth had changed on the later examination in approximately %.  ...  The objective of this study was to investigate the presence or absence and types of changes in the structure of the mandibular condyle and articular disc on MR images over time in patients examined by  ...  Changes in the bone structure of the mandibular condyle, positions of the articular disc when the mouth was closed and open, and the presence or absence of morphological changes were classified as  ... 
doi:10.20738/johb.31.1_25 fatcat:t6axgosyu5hvrm35i7dtmref4u

Morphological scale-space in image processing

Joseph H. Bosworth, Scott T. Acton
2003 Digital signal processing (Print)  
gray-level bias of the open and close filters is easily observed in the presence of impulsive noise.  ...  By utilizing both open and close filters, this filtering method is robust in the presence of impulsive noise, as is alternating sequential filtering.  ... 
doi:10.1016/s1051-2004(02)00033-7 fatcat:zyjjgsmqnjc7xci6u2fodo5yne

Morphological processing of proper orthogonal modes for crack detection in beam structures

Konstantinos Gryllias, Ioannis Koukoulis, Christos Yiakopoulos, Ioannis Antoniadis, Christopher Provatidis
2009 Journal of Mechanics of Materials and Structures  
For this purpose, the four basic morphological operators (dilation, erosion, opening, closing) are compared, using two different types of structuring elements.  ...  ) aimed at obtaining low-dimensional approximations of high-dimensional processes, taking into account nonlinearities and minimizing noise effects.  ...  Acknowledgements This work is cofunded by the European Social Fund (75%) and National Resources (25%) -Operational Program for Educational and Vocational Training II (EPEAEK II) and particularly the Program  ... 
doi:10.2140/jomms.2009.4.1063 fatcat:xwpnkofklfefxcymzuqqigpil4

An efficient wide-band signal detection and extraction method

Qian Cheng, Kexian Gong, Min Zhang, Xiaoyan Liu, I. Barukčić
2021 MATEC Web of Conferences  
Aiming at the influence of time-varying and frequency-varying of noise on the signal detection performance in the short wave wide-band channel and the large amount of computation in the channelized receiver  ...  model of the traditional low pass filter bank, a cross-channel reconfigurable multi-phase high-efficiency channelization method based on morphological processing is proposed in this paper .Firstly, The  ...  By formula (4) (5) (6) (7) (8) , the noise floor of power spectrum is obtained by the mixed Morphological operation of the opening and closing, which better reflects the fluctuation of the real noise  ... 
doi:10.1051/matecconf/202133604011 fatcat:ypzxxapa55hjhjfneoqms4ri7u

Detection of secondary reflections using morphology

John W. V. Miller, Behrouz N. Shabestari, Bruce G. Batchelor, Susan S. Solomon, Frederick M. Waltz
1994 Machine Vision Applications, Architectures, and Systems Integration III  
The secondary reflection is difficult to detect reliably given the large difference in magnitude between the two peaks, the presence of noise, and the varying amounts of overlap between the two peaks that  ...  The signal is pre-processed using onedimensional morphological and linear methods to normalize the background and remove noise.  ...  Morphological openings and closings are obtained by using both erosion and dilation.  ... 
doi:10.1117/12.188741 fatcat:3mqbfs4dy5bbvdc5crrt3rjxoa

Noise Removal and Image Segmentation in Micrographs of Ferrite-Martensite Dual-Phase Steel

Tanusree Dutta, Siddhartha Banerjee, Sanjoy Kumar Saha
2017 DEStech Transactions on Engineering and Technology Research  
 Present work proposes a new methodology for removal of noise (artifacts) from the micrograph, which normally poses a problem during segmentation of phases and measurement of their volume percentages.  ...  After thresholding, the noise removing algorithm is applied in different modes.  ...  The four basic morphological operations are erosion, dilation, opening and closing [24] .  ... 
doi:10.12783/dtetr/apetc2017/11061 fatcat:ijobojfs5fg6dlbu34jgzhacxi

A pseudo top-hat mathematical morphological approach to edge detection in dark regions

T. Chen, Q.H. Wu, R. Rahmani-Torkaman, J. Hughes
2002 Pattern Recognition  
By such an approach, "ne edge details in dark region of the image are eliminated.  ...  In this paper, a novel mathematical morphological edge detection algorithm, based on pseudo top-hat transformation which is derived from top-hat transformation, is proposed to preserve these edge details  ...  Studies show that morphological edge detectors have outperformed previous edge detectors in robustness of detecting edges with presence of noise.  ... 
doi:10.1016/s0031-3203(01)00024-3 fatcat:2ijrb5qwpffdxpo2efv7c66wai

Application of Digital Image Processing in Drug Industry

Huvaida Manzoor
2017 IOSR Journal of Computer Engineering  
But these medicines might be defected, tablets may be broken, there may be missing tablet in a strip and consumption of such drugs might be dangerous.  ...  Digital Image Processing is a very vast field It has many applications in every field and one such application is in drug industry. Drug Industry is leading industry.  ...  The opening has the effect of removing objects that cannot completely contain the structuring element.  Closing: Closing is opening performed in reverse.  ... 
doi:10.9790/0661-1901025560 fatcat:r5rkya4pg5gvvfx75un6xffiki

Mathematical morphology approach for single-channel processing of auscultative sound

Alexandr G. Rudnitskii, Institute of Hydromechanics, National Academy of Sciences of Ukraine, ul. Zhelyaebova 8/4, Kyiv, 03680 Ukraine
2019 Journal of Applied Mathematics and Computation  
Keywords The problem of isolating breath and cardiac sounds in the total signal registered on a human thorax has been of interest to physicians and researchers in the last two decades.  ...  The method is based on a hybrid algorithm using a mathematical morphological approach and spectral subtraction technique.  ...  It is important to note that since the operations of closing and opening do not commute, in general a different result is expected when the order of closing and opening operations is switched.  ... 
doi:10.26855/jamc.2019.09.001 fatcat:kvgfhmmhp5ffbg3xtah5opgh5a

Automatic morphology-based cubic p-spline fitting methodology for smoothing and baseline-removal of Raman spectra

Juan José González-Vidal, Rosanna Pérez-Pueyo, María José Soneira
2017 Journal of Raman Spectroscopy  
In this work, we present a new denoising procedure which enhances the Raman information while reducing unwanted contributions from the most frequent noise sources, i.e. the shot noise and the fluorescence's  ...  The method relies on cubic p-spline fitting and mathematical morphology, and requires no user input.  ...  Acknowledgements The authors are very grateful to Nadim C. Scherrer from the Bern University of Applied Sciences for kindly providing a subset of the Raman spectra that were used in the current work.  ... 
doi:10.1002/jrs.5130 fatcat:tuyyv7rqxbhb3oenql32qejzbm

Electrocardiogram Baseline Wander Suppression Based on the Combination of Morphological and Wavelet Transformation Based Filtering

Xiang-kui Wan, Haibo Wu, Fei Qiao, Feng-cong Li, Yan Li, Yue-wen Yan, Jia-xin Wei
2019 Computational and Mathematical Methods in Medicine  
One of the major noise components in electrocardiogram (ECG) is the baseline wander (BW).  ...  Hence, in this study, we introduce a method by combining the MMF and WT to overcome the shortcomings of both existing methods.  ...  of opening in equation (9) and closing in equation (10) is sliding a given structuring element along with the signal from beneath and above, respectively.  ... 
doi:10.1155/2019/7196156 fatcat:fk66nskr2nfzlgf6dyrlmgcdry

Morphology-Based Automated Baseline Removal for Raman Spectra of Artistic Pigments

Rosanna Perez-Pueyo, Maria Jose Soneira, Sergio Ruiz-Moreno
2010 Applied Spectroscopy  
Several techniques have been employed to minimize the presence of this fluorescence in order to resolve and analyze Raman spectra.  ...  Results indicate that the proposed automated method is efficient in fluorescence subtraction and retains the line shapes and positions of the Raman bands in the spectra.  ...  The same happens when a dilation is followed by an erosion. This composition is called the closing operator. Opening and closing are the basic operations of morphological noise removal.  ... 
doi:10.1366/000370210791414281 pmid:20537226 fatcat:mk75oec2orawplp6xeiuspjkgy

Medical Image Edge Detection Based on Soft Computing Approach

J.Mehena, M. C. Adhikary
2015 International Journal of Innovative Research in Computer and Communication Engineering  
Edge detection of medical images is one of the most important applications for image segmentation. It refers to the process of identifying and locating sharp discontinuities in medical images.  ...  Here, an image is considered as a fuzzy set and pixels are taken as elements of fuzzy set.  ...  a flat top, is useful for enhancing detail in the presence of shading.  ... 
doi:10.15680/ijircce.2015.0307033 fatcat:qpns46izzndfdik3a3j7mkdfzq
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