Signal, Image and Video Processing
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Spatial analysis of EEG signals for Parkinson’s disease stage detection
Signal, Image and Video Processing - Tập 14 - Trang 397-405 - 2019
Diagnosis of Parkinson’s disease (PD) in the early stages is very critical for effective treatments. In this paper, we propose a simple and low-cost biomarker to diagnose PD, using the electroencephalography (EEG) signals. In the proposed method, EEG is used to detect the brain electrical activities in internal regions of brain, e.g., basal ganglia (BG). Based on the high correlation between PD an...... hiện toàn bộ
Restoration of highly salt-and-pepper-noise-corrupted images using novel adaptive trimmed median filter
Signal, Image and Video Processing - Tập 14 - Trang 1555-1563 - 2020
The paper presents a novel adaptive trimmed median (ATM) filter to remove salt-and-pepper (SAP) noise of high noise density (ND). The proposed filter computes median of trimmed window of adaptive size containing noise-free pixels (NFP) for ND up medium range while performs new interpolation-based procedure at high ND. Further, for the rare scenarios especially at the boundary where denoising using...... hiện toàn bộ
A modified Gaussian mixture background model via spatiotemporal distribution with shadow detection
Signal, Image and Video Processing - Tập 10 - Trang 343-350 - 2015
This paper proposes a modified Gaussian mixture model designed to improve sensitivity in highly dynamic environments, overcome the low background recovery rate of the traditional Gaussian mixture model (GMM). This model uses spatial information to compensate for time information, and the neighborhood of each pixel is sampled using a random number generation method to complete the spatial backgroun...... hiện toàn bộ
Multi frequency band fusion method for EEG signal classification
Signal, Image and Video Processing - Tập 17 - Trang 1883-1887 - 2022
This paper proposes a novel convolutional neural network (CNN) fusion method for electroencephalography (EEG) motor imagery (MI) signal classification. The method is named MFBF, which stands for multifrequency band fusion. The MFBF method relies on filtering the input signal with different frequency bands and feeding each band signal to a duplicate of a CNN model; then, all duplicates are concaten...... hiện toàn bộ
Spline adaptive filtering algorithm based on Heaviside step function
Signal, Image and Video Processing - Tập 16 - Trang 1333-1343 - 2022
To reduce the interference of impulsive noise when the spline adaptive filter (SAF) algorithm is used to identify nonlinear systems, this paper proposes a family of SAF algorithms using the Heaviside step function (HSF). The suitability of those cost functions proposed are investigated; those cost functions are design based on some HSF’s approximate functions. Then based on that, four SAF algorith...... hiện toàn bộ
Depth estimation using modified cost function for occlusion handling
Signal, Image and Video Processing - Tập 13 - Trang 1539-1547 - 2019
This paper presents a novel approach to the occlusion handling problem in depth estimation using three views. A solution based on modification of similarity cost function is proposed. During the depth estimation via optimization algorithms, like Graph Cuts, the similarity metric is constantly updated so that only non-occluded fragments in the side views are considered. At each iteration of the alg...... hiện toàn bộ
A modified spectral conjugate gradient projection method for signal recovery
Signal, Image and Video Processing - Tập 12 - Trang 1455-1462 - 2018
In this paper, signal recovery problems are first reformulated as a nonlinear monotone system of equations such that the modified spectral conjugate gradient projection method proposed by Wan et al. can be extended to solve the signal recovery problems. In view of the equations’ analytic properties, an improved projection-based derivative-free algorithm (IPBDF) is developed. Compared with the simi...... hiện toàn bộ
Model-assisted content adaptive detail enhancement and quadtree decomposition for image visibility enhancement
Signal, Image and Video Processing - Tập 17 - Trang 725-733 - 2022
In this work, a simple and unique, yet effective framework for visibility enhancement, using image decomposition, adaptive boundary constraint and quadtree-based dehazing, detail enhancement and fusion is proposed. The input image firstly undergoes image decomposition, to be split into its its ambient illumination and reflex lightness components. For increasing brightness and contrast, contrast-ba...... hiện toàn bộ
Multicomponent AM-FM signal separation and demodulation with null space pursuit
Signal, Image and Video Processing - Tập 7 - Trang 1093-1102 - 2012
The operator-based signal separation approach, which formulates signal separation as an optimization problem, uses an adaptive operator to separate a signal into additive subcomponents. Furthermore, it is possible to design different operators to fit different signal models. In this paper, we propose a new kind of differential operator to separate multicomponent AM-FM signals. We then use the esti...... hiện toàn bộ
Three information set-based feature types for the recognition of faces
Signal, Image and Video Processing - Tập 10 - Trang 327-334 - 2015
This paper presents three feature types based on the concept of information set for face recognition. The first set of features includes sigmoid and energy features. The second set of features includes two features, viz. effective information set features-I and features-II and their combinations using t-norms, s-norms of Hamacher and Yager. The third set of features includes two hybrid features ca...... hiện toàn bộ
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