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Filters
Median-type filters with model-based preselection masks
1996
Image and Vision Computing
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All rights reserved PZZ SO262-8856(96)01084-O In this paper new median-type filters, called Mask-Model Filters, are introduced. ...
To remove impulsive noise, several variants of median-type filters are presented. ...
This simple filter is the conventional median filter operating with the preselection mask. The model Q(w) is used here only for building the NEM, and not in the filtering process. ...
doi:10.1016/s0262-8856(96)01084-0
fatcat:5bc3ucr36jclbakk3uoxq6copi
Automatic Lesion Detection in Breast DCE-MRI
[chapter]
2013
Lecture Notes in Computer Science
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The proposed method is based on a Support Vector Machine trained with dynamic features, extracted, after a suitable pre-processing of the image, from an area preselected by using a pixel-based approach ...
Our results were also compared to other automatic segmentation methodologies: the proposed method maximises the area of correctly detected lesions while minimizing the number of false alarms (with an accuracy ...
In this study we adopted a median filter-based pre-processing: in this manner, small shifts are considered as noise superimposed on correctly aligned images. ...
doi:10.1007/978-3-642-41184-7_37
fatcat:cxi44od4rjfmhnsjx6qykpwal4
Automated Detection of Candidate Subjects With Cerebral Microbleeds Using Machine Learning
2022
Frontiers in Neuroinformatics
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We also used the UK Biobank dataset to compare our approach with alternative CMB preselection methods using non-imaging factors and/or imaging data. ...
We developed and evaluated our pipelines on different types of images, consisting of SWI or GRE images. ...
(A) Input image with green boxes indicating manually segmented CMBs, (B) vessel removed image and (C) result of the shape-based filtering. ...
doi:10.3389/fninf.2021.777828
pmid:35126079
pmcid:PMC8811357
fatcat:ihozpe4q25cwlbqw2panfkrmxq
Patch-based segmentation using expert priors: Application to hippocampus and ventricle segmentation
2011
NeuroImage
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A comparison with an appearance-based method and a template-based method was also carried out. ...
The highest median kappa index values obtained with the proposed method were 0.884 for hippocampus segmentation and 0.959 for lateral ventricle segmentation. ...
The Rician noise level, used as a filtering parameter, was estimated with the object-based method proposed . ...
doi:10.1016/j.neuroimage.2010.09.018
pmid:20851199
fatcat:k4fmsrptrnagjkv4aqzhz2zx4y
Caesar source finder: Recent developments and testing
2019
Publications Astronomical Society of Australia
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2019 pre-print arXiv:1909.06116v1 fatcat:xequjh54rnc5jf34alkn7b5ypa
The achieved sensitivity and large field of view already allow to discover new sources and survey thousands of existing ones with improved precision with respect to previous surveys. ...
AbstractA new era in radio astronomy will begin with the upcoming large-scale surveys planned at the Australian Square Kilometre Array Pathfinder (ASKAP). ...
Two different algorithms are available, one based on the Chan-Vese active contour model (Chan & Vese, 2001) and the other based on the localizing region-based active contour (LRAC) model (Lankton & ...
doi:10.1017/pasa.2019.29
fatcat:4ovdul7pw5bwhnl3ilxjfhjh2m
Genetic Architect: Discovering Genomic Structure with Learned Neural Architectures
[article]
2016
arXiv
pre-print
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Each human genome is a 3 billion base pair set of encoding instructions. ...
Table 1 : 1 Mean and median AUC of models and percentage of datasets on which each model outperforms DeepBind or DeepMotif. model
mean AUC median AUC vs DeepBind vs DeepMotif
DeepBind
0.904
0.932 ...
We also train PromoterNet architectures on single task regression with a separate model for each of the 11 lineages and on cell type specific multi-task regression with one output unit for each of 243 ...
arXiv:1605.07156v1
fatcat:452xiedlvzbajmcf7f4qbznssq
Post-radiochemotherapy PET radiomics in head and neck cancer – The influence of radiomics implementation on the reproducibility of local control tumor models
2017
Radiotherapy and Oncology
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Post-radiochemotherapy PET radiomics in head and neck cancer -The influence of radiomics implementation on the reproducibility of local control tumor models. ...
Local control rate curves for low-and high-risk of recurrence groups based on the two PET radiomic models. The curves split significantly independent of the implementation (G-rho test p-value < 0.05). ...
It was most probably caused by differences in mask construction and wavelet transform workflow: especially in the translation of the bin size to the wavelet transformed images and the type of transform ...
doi:10.1016/j.radonc.2017.10.023
pmid:29122358
fatcat:4nfkmuvlunfvfiej5j6uu74z3q
Hyperparameter Optimization for Image Recognition over an AR-Sandbox Based on Convolutional Neural Networks Applying a Previous Phase of Segmentation by Color–Space
2018
Symmetry
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implementation of a previous phase of color–space segmentation to a set of tests captured from the AR-Sandbox, and evaluating this type of segmentation using similarity indexes such as Jaccard and Sørensen–Dice ...
For this reason, this research has the purpose of establishing a model of a CNN for the classification of geometric figures by optimizing hyperparameters using Random Search, evaluating the impact of the ...
Table 3 shows each model with the values obtained with both datasets. Table 3 . Preselected model validation. ...
doi:10.3390/sym10120743
fatcat:rej44xp5hjb63k7a3d2mnkzbjy
An improved motion-compensated restoration method for damaged color motion picture films
2004
Signal processing. Image communication
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The method consists of an improved multiresolution block matching with log-D search, a rank ordered differences-based blotch detection and 3D vector median filtering for interpolation of missing data, ...
Performance of the method is tested on artificially corrupted image sequences and real motion picture films, and is compared to that of the three-frame-based method which involves similar algorithms except ...
masks, W z ; with size of 3 Â 3: These filters are shown in Fig. 6 . ...
doi:10.1016/j.image.2004.01.001
fatcat:wjxybi3eh5enzfqmkvc53adns4
Extensive light profile fitting of galaxy-scale strong lenses
2015
Astronomy and Astrophysics
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We investigate the merits of a massive forward modeling of ground-based optical imaging as a diagnostic for the strong lensing nature of Early-Type Galaxies, in the light of which blurred and faint Einstein ...
We then fit for the lensed light distribution with sl_fit after having subtracted the foreground light emission off (ideal case) and also after having fitted the deflector's light with galfit. ...
This research is based on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, a joint project of CFHT, Taiwan, Korea, Canada and France, at the Canada-France-Hawaii Telescope ...
doi:10.1051/0004-6361/201425275
fatcat:klacoay4hjdcveenmsjy2yhufq
A New Tool to Estimate Inundation Depths by Spatial Interpolation (RAPIDE): Design, Application and Impact on Quantitative Assessment of Flood Damages
2018
Water
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The interpolation is improved by (i) the use of auxiliary lines, perpendicular to the river reach, along which additional control points are placed and (ii) the possibility to introduce a mask for filtering ...
This paper presents RAPIDE, a new GIS-based tool for the estimation of the water depth distribution that relies only on the perimeter of the inundation and a digital terrain model. ...
spacing' case; (d) Mask for filtering interpolation points in urban areas ...
doi:10.3390/w10121805
fatcat:r4itthklk5gglnybzzmvq7i5xe
Spoof Detection of Fingerprint Biometrics based on Local and Global Quality Measures
2015
International Journal of Computer Applications
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Biometric system is vulnerable to various types of attacks. This paper proposes a method to avoid the sensor level attack. ...
Among the various types of biometrics, fingerprint is the most widely accepted biometrics. Biometric systems have several advantages when compared to classical methods such as passwords. ...
is attacked and corrupted so that it produces preselected match scores Type 6-Tampering with stored templates: The database of stored templates could be either local or remote. ...
doi:10.5120/ijca2015905804
fatcat:l2iur5xhzrbirjk5qe5fg2pvyq
Identification of bovine sperm head for morphometry analysis in quantitative phase-contrast holographic microscopy
2011
Optics Express
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It is demonstrated that both proposed methods are efficient to skim the data set in a preselective analysis for discarding anomalous data. ...
Their model has been thought to build a strong filter contribution in areas of the image where gray levels are locally coherent, while maintaining almost unchanged areas with high gradient, in order to ...
The first, which we will call Algorithm 1, is based on a nonlinear diffusion filter. ...
doi:10.1364/oe.19.023215
pmid:22109200
fatcat:cvmcnhkmwjdbheexz3cbnpu4sy
Impulse noise removal using polynomial approximation
1998
Optical Engineering: The Journal of SPIE
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To remove noises from the corrupted image, we propose a new filter called a polynomial approximation (PA) filter, which is developed by modeling a local region with a polynomial that can best approximate ...
Major improvements are obtained in comparison with other state-of-the-art algorithms. ...
Filtering Algorithm
Fixed-Value
Impulses (dB)
Random-Valued
Impulses (dB)
Median filter (3ϫ3)
28.57
29.76
Median filter (5ϫ5)
28.78
28.59
Median filter with adaptive length 2
30.57
31.18 ...
doi:10.1117/1.601964
fatcat:4mahnmmrkvarnhj6bsrpunj24a
Contour Extraction of Femur and Tibia Condyles on Plain Anteroposterior (AP) Radiograph
2012
International Journal of Computer Applications
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The images are resized and filtered to detect femoral and tibia condyles edge pixels respectively. Thresholding is then applied which introduce outliers. ...
The entire radiograph underwent filtering three times with a 3 × 3 square neighborhood median filter to reduce the image noise. ...
The classical gradient based edge detection operators are Sobel [7] , Robert [10] , and Prewitt [8] each designed to be sensitive to certain types of edges. ...
doi:10.5120/8278-1893
fatcat:2kg7s3lsvve3np4gqh25wjgrhm
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