Results 31 to 40 of about 962,627 (274)
A Gray Scale Correction Method for Side-Scan Sonar Images Based on Retinex
Remote Sensing, 2019 When side-scan sonars collect data, sonar energy attenuation, the residual of time varying gain, beam patterns, angular responses, and sonar altitude variations occur, which lead to an uneven gray level in side-scan sonar images.
Xiufen Ye +4 more
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Estimation of the control parameter from symbolic sequences: Unimodal maps with variable critical point [PDF]
, 2008 The work described in this paper can be interpreted as an application of the order patterns of symbolic dynamics when dealing with unimodal maps. Specifically, it is shown how Gray codes can be used to estimate the probability distribution functions ...
David Arroyo +3 more
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Mapping Gray Maritime Networks
Connections, 2019 Abstract This research focused on the identification and tracking of subgroups of vessels of interest, owners, operators, ports, cargoes, and specific activities associated with artificial reef enhancement and construction in the South China Sea.
Porter, Wayne +8 more
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New extremal binary self-dual codes of length 68 from quadratic residue codes over f_2+uf_2+u^2f_2
, 2013 In this work, quadratic reside codes over the ring F2 +uF2 +u^2F2 with u^3 = u are considered. A duality and distance preserving Gray map from F2 + uF2 + u^2F2 to (F_2)^3 is defined.
Kaya, Abidin +2 more
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Two-Dimensional Compact Variational Mode Decomposition-Based Low-Light Image Enhancement
IEEE Access, 2019 In this paper, a novel methodology is proposed for low-light image enhancement. The proposed algorithm contains three stages: image reconstruction, image enhancement and color restoration. Two-dimensional compact variational mode decomposition (2D-TV-VMD)
Fengji Ma, Junyi Chai, Hai Wang
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Crack Detection in Pavement Images Based on a Self- Adaptive Niche Algorithm
Journal of Applied Science and Engineering, 2021 This study focuses on optical image pavement damage detection instead of artificial detection in pavement maintenance. Based on the characteristics of cracks and combined with the niche theory, it proposes a dynamic adaptive curve extraction algorithm ...
Peng Bai +4 more
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European Radiology Experimental, 2022 Background We investigated the correlation between texture features extracted from apparent diffusion coefficient (ADC) maps or diffusion-weighted images (DWIs), and grade group (GG) in the prostate peripheral zone (PZ) and transition zone (TZ), and ...
Chie Tsuruta +4 more
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Phantom maps and the Gray index
Topology and its Applications, 2004 Let \(X\) be a CW complex with skeleta \(X_n\) and let \(q_n: X\to X/X_n\) denote the quotient map. A phantom map \(f:X\to Y\) is a map with the property that, for each \(n\), there is \textit{at least one} map \(f_n:X/X_n\to Y\) such that \(f \simeq f_n \circ q_n\). It may or may not happen that \(f_n\) is itself a phantom map; the Gray index of \(f\)
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Frontiers in Computational Neuroscience, 2017 The blurred gray/white matter junction is an important feature of focal cortical dysplasia (FCD) lesions. FCD is the main cause of epilepsy and can be detected through magnetic resonance (MR) imaging. Several earlier studies have focused on computing the
Xiaoxia Qu +8 more
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7T MRI with post-processing for the presurgical evaluation of pharmacoresistant focal epilepsy
Therapeutic Advances in Neurological Disorders, 2021 Background: We aimed to evaluate the diagnostic yield of seven-tesla (7T) magnetic resonance imaging (MRI) with post-processing of three-dimensional (3D) T1-weighted (T1W) images by the morphometric analysis program (MAP) in epilepsy surgical candidates ...
Cong Chen +16 more
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