Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
Filters








3,098 Hits in 3.7 sec

Statistical and deterministic approaches for multimedia forensics

Cecilia Pasquini
2016 ELCVIA Electronic Letters on Computer Vision and Image Analysis  
the detection in one-dimensional data of a common data smoothing operation, the median filter.  ...  Moreover, we have explored the possibility of defining and exploiting deterministic properties related to a certain processing operation in the forensic analysis, presenting a first approach targeted to  ...  We propose a forensic technique able to detect the application of a median filter to 1D data [2] .  ... 
doi:10.5565/rev/elcvia.984 fatcat:gu2susje7za63hmzoiqrpasgp4

Implementation of Artifact Removal Algorithms in Gait Signals for Diagnosis of Parkinson Disease

Erdoğan Özel, Ramazan Tekin, Yılmaz Kaya
2021 Traitement du signal  
In this study, a new approach is proposed for the diagnosis of PD.  ...  Common Average Reference (CAR), Median Common Average Reference (MCAR), and Weighted Common Average Reference (WCAR) methods were primarily utilized to eliminate noise from the multichannel recorded walking  ...  The authors of this article would like to thank the staff of MaVi Laboratory for their support.  ... 
doi:10.18280/ts.380306 fatcat:dndab7i22jh3ne6eqp37gp4n7i

Optical electrocardiogram based heart disease prediction using hybrid deep learning

Avinash L. Golande, T. Pavankumar
2023 Journal of Big Data  
Because using solely deep learning approaches failed to detect all of the important beats from the input ECG signal, a hybrid strategy is necessary to improve detection efficiency.  ...  To efficiently classify data, we design a hybrid approach using a conventional ECG beats extraction algorithm and Convolutional Neural Network (CNN)-based features.  ...  Acknowledgements I am grateful to all of those with whom I have had the pleasure to work during the completion of the entire experiment.  ... 
doi:10.1186/s40537-023-00820-6 fatcat:7sqkyxynenh7tiyshdzbcok7lu

Belief Propagation in a 3D Spatio-temporal MRF for Moving Object Detection

Zhaozheng Yin, Robert Collins
2007 2007 IEEE Conference on Computer Vision and Pattern Recognition  
In this paper we present a Belief Propagation approach for moving object detection using a 3D Markov Random Field (MRF) model.  ...  This approach deals effectively with difficult moving object detection problems like objects camouflaged by similar appearance to the background, or objects with uniform color that frame difference methods  ...  The median filter removes many isolated detected motion pixels resulting in an object mask that is too small. Gaussian filters are rotationally symmetric low pass filters.  ... 
doi:10.1109/cvpr.2007.383184 dblp:conf/cvpr/YinC07 fatcat:xhnvw76bivcbbfe2he6w3ag73y

Fault diagnosis of Tennessee Eastman process using signal geometry matching technique

Han Li, De-yun Xiao
2011 EURASIP Journal on Advances in Signal Processing  
This article employs adaptive rank-order morphological filter to develop a pattern classification algorithm for fault diagnosis in benchmark chemical process: Tennessee Eastman process.  ...  Data fusion technique is also utilized to combine diagnostic results from multiple sources.  ...  The authors also would like to appreciate the anonymous reviewers whose comments greatly enhanced the presentation and clarity of this paper.  ... 
doi:10.1186/1687-6180-2011-83 fatcat:4fxaqpscyjakbbfmfobmnexmdm

Colour and texture segmentation using wavelet frame analysis, deterministic relaxation, and fast marching algorithms

S. Liapis, E. Sifakis, G. Tziritas
2004 Journal of Visual Communication and Image Representation  
The first, a deterministic relaxation algorithm using a quadratic distance measure, yields the labelling of pixels to the different colour-texture classes.  ...  Luminance, colour, and/or texture features may be used, either alone or in combination, for segmentation.  ...  Averaging the distances provides a more reliable distance measure, and in the presence of region boundaries the median filter should be preferred over a linear filter.  ... 
doi:10.1016/s1047-3203(03)00025-7 fatcat:q3ac4bqzgfgijdbxvksv2qiwn4

Detection of Breast Cancer Using Histopathological Image Classification Dataset with Deep Learning Techniques

V. K. Reshma, Nancy Arya, Sayed Sayeed Ahmad, Ihab Wattar, Sreenivas Mekala, Shubham Joshi, Daniel Krah, Siddesh G.M.
2022 BioMed Research International  
So, it may serve as a second opinion tool for pathologists and aid in the early detection of diseases.  ...  It created an automatic segmentation approach that is then followed by self-driven post-processing activities to successfully identify the Fourier Transform based Segmentation in the CAD system to improve  ...  To smooth the pixels in the picture, use the median filter as follows: Median filtering is a nonlinear approach to removing noise from pictures that may be applied to any image.  ... 
doi:10.1155/2022/8363850 pmid:35281604 pmcid:PMC8913119 fatcat:hc3lp5tbdndedgw5wn75sfbgfe

Improved Post-Processing for Human Detection in Railroad Surveillance

Xueying Xin, Zhenhua Guo, Bo Yuan, Jie Zhou
2014 2014 International Conference on Service Sciences  
The accuracy of human detection in railroad surveillance is often limited due to occlusion and noise, causing incomplete objects in foreground masks.  ...  In this work, we introduce a novel integration step into the post-processing module following FD.  ...  [ 11 ] organized various shadow removal algorithms in a two-layer taxonomy, the layer of deterministic approaches and the layer of statistical approaches.  ... 
doi:10.1109/icss.2014.11 fatcat:upeqprhghzc75lq4pkoob4g5ka

A Review on Noise and Denoise of Biometric Images

Jyotsna Singh
2018 International Journal for Research in Applied Science and Engineering Technology  
In digital image processing, lessening in the noise is an essential procedure to interpret, analyze & enhance the main facts in an image. Still Lessening of Noise is a demanding task.  ...  In our work we mainly focused on denoising of biometric images such as MRI and USI images.  ...  Cecilia Pasquini, et al. (2016) offers a technique which is able to recognize the usage of a median filter to 1D data.  ... 
doi:10.22214/ijraset.2018.3037 fatcat:3ycahz3dubhvbgd554logha7fy

Accurate Machine Learning Atmospheric Retrieval via a Neural Network Surrogate Model for Radiative Transfer [article]

Michael D. Himes, Joseph Harrington, Adam D. Cobb, Atilim Gunes Baydin, Frank Soboczenski, Molly D. O'Beirne, Simone Zorzan, David C. Wright, Zacchaeus Scheffer, Shawn D. Domagal-Goldman, Giada N. Arney
2021 arXiv   pre-print
Here we present a novel approach to retrieval by training a forward ML surrogate model that predicts spectra given model parameters, providing a fast approximate RT simulation that can be used in a conventional  ...  The low signal-to-noise ratio of exoplanet observations require a Bayesian approach to determine posterior probability distributions of each model parameter, given observed spectra.  ...  ACKNOWLEDGMENTS We thank contributors to NumPy, SciPy, Matplotlib, Tensorflow, Keras, and the Python Programming Language, the free and open-source community, and the NASA Astrophysics Data System for  ... 
arXiv:2003.02430v3 fatcat:3higkqzztvflbd2qgwkxzo5axi

Tissue Models and Speckle Reduction in Medical Ultrasound Images [chapter]

Radim Kolář, Jiří Jan
2005 Lecture Notes in Computer Science  
Parameter of this distribution is used to adjust an adaptive filter.  ...  This paper presents a new method for speckle noise reduction in medical ultrasound images.  ...  of circular shaped object: a) Original image , b) After Nakagami filtering, c) median filtering and d) Wiener filtering SI = µ σ (14) Fig. 5 .Fig. 6 . 56 1D profile of the circular object.  ... 
doi:10.1007/11499145_103 fatcat:cfe35hgsordmdeirf54fk2jqjy

CELLULAR AUTOMATA AS A TOOL FOR IMAGE PROCESSING [chapter]

Paul L. Rosin, Xianfang Sun
2011 Emerging Topics in Computer Vision and its Applications  
We first consider the number of patterns that can exist in a neighbourhood, allowing for invariance to certain transformation.  ...  These patterns correspond to possible rules, and several schemes are described for automatically learning an appropriate rule set from training data.  ...  For comparison, results of filtering are providing using a 3 × 3 median filter with the optimal number of iterations determined for the test image, giving the median a favourable bias.  ... 
doi:10.1142/9789814343008_0012 fatcat:nux2ucr7hfhqlhqrn5xzjzphsi

Parallel visual data restoration on multi-GPGPUs using stencil-reduce pattern

Marco Aldinucci, Guilherme Peretti Pezzi, Maurizio Drocco, Concetto Spampinato, Massimo Torquati
2015 The international journal of high performance computing applications  
In this paper, a highly effective parallel filter for visual data restoration is presented.  ...  As a result of its high-level design, it is possible to run the filter seamlessly on a multicore machine, on multi-GPGPUs, or on both.  ...  An example is the Multi-State Median Filter (MSMF) [13] , which consists of a two-part noisy pixel detection stage and a correction stage by applying the median filter.  ... 
doi:10.1177/1094342014567907 fatcat:6tpsriexfvbnbda2pfhlb7wula

Multiscale and Multi-Granularity Process Analytics: A Review

Marco Reis
2019 Processes  
dynamics at multiple scales becomes a common pattern; therefore, multiscale methods are called for and must be applied in order to avoid biased analysis towards a certain scale, compromising the benefits  ...  Also, these same enabling technologies currently collect large volumes of data at high-sampling rates, creating a flood of digital information that needs to be properly handled; optimal data aggregation  ...  data with a finite impulse response median hybrid filter) were used for estimating a PCA model, which was finally applied for monitoring purposes.  ... 
doi:10.3390/pr7020061 fatcat:gfr4kphirzej3g6zjrebbedgta

Use of 1D-CNN for input data size reduction of LSTM in Hourly Rainfall-Runoff modeling [article]

Kei Ishida, Ali Ercan, Takeyoshi Nagasato, Masato Kiyama, Motoki Amagasaki
2021 arXiv   pre-print
In comparison to observed flows, the median of the NSE values for the test period are 0.455-0.469 for 1D-CNN (based on NCHF=8, 16, and 32, the numbers of the channels of the feature map of the first layer  ...  time series data for a short-duration.  ...  Acknowledgement The radar raingauge-analyzed precipitation (RRAP) data were obtained from Japan Meteorological Business Support Center.  ... 
arXiv:2111.04732v1 fatcat:ychvy5ykpbbuloacsgppdmc4rm
« Previous Showing results 1 — 15 out of 3,098 results