Results 11 to 20 of about 538 (196)

Classifying Power Quality Issues in Railway Electrification Systems Using a Nonsubsampled Contourlet Transform Approach [PDF]

Engineering Reports
Railway electrification systems (ESs) pose significant challenges due to highly variable power demands and dynamic train operations. Effective power quality (PQ) monitoring for high‐speed trains (HSTs) is crucial for maintaining stable and uninterrupted ...
Pampa Sinha, Kaushik Paul, I. M. Elzein, Mohamed Metwally Mahmoud, Ali M. El‐Rifaie, Wulfran Fendzi Mbasso, Ahmed M. Ewais   +6 more
doaj   +3 more sources

Combining Segmentation Network and Nonsubsampled Contourlet Transform for Automatic Marine Raft Aquaculture Area Extraction from Sentinel-1 Images [PDF]

Remote Sensing, 2020
Marine raft aquaculture (MFA) plays an important role in the marine economy and ecosystem. With the characteristics of covering a large area and being sparsely distributed in sea area, MFA monitoring suffers from the low efficiency of field survey and ...
Yi Zhang, Chengyi Wang, Yuan Ji, Jingbo Chen, Yupeng Deng, Jing Chen, Yongshi Jie   +6 more
doaj   +4 more sources

Spatial Images Feature Extraction Based on Bayesian Nonlocal Means Filter and Improved Contourlet Transform [PDF]

Journal of Applied Mathematics, 2012
Spatial images are inevitably mixed with different levels of noise and distortion. The contourlet transform can provide multidimensional sparse representations of images in a discrete domain.
Pengcheng Han, Junping Du
doaj   +3 more sources

A grid-line suppression technique based on the nonsubsampled contourlet transform in digital radiography [PDF]

Nuclear Engineering and Technology, 2023
In radiography, an antiscatter grid is a well-known device for eliminating unexpected x-ray scatter. We investigate a new stationary grid artifact suppression method based on a nonsubsampled contourlet transform (NSCT) incorporated with Gaussian band ...
Namwoo Kim, Taeyoung Um, Hyun Tae Leem, Bon Tack Koo, Kyuseok Kim, Kyu Bom Kim   +5 more
doaj   +2 more sources

Image Edge Detection Based on Gaussian Mixture Model in Nonsubsampled Contourlet Domain [PDF]

Journal of Electrical and Computer Engineering, 2016
In order to get accurate location and continuous edges, Gaussian mixture model and local direction modulus nonmaxima suppression are used in high frequency subbands of nonsubsampled Contourlet transform.
Li Yang, Chang Xia, Chang Juan
doaj   +3 more sources

Efficient automated detection of power quality disturbances using nonsubsampled contourlet transform & PCA-SVM [PDF]

Energy Exploration & Exploitation
The increasing complexity of modern power systems, driven by smart grid technologies, dispersed generation, and renewable energy sources, has made power quality (PQ) evaluation more challenging.
Pampa Sinha, Kaushik Paul, Asit Mohanty, IM Elzein, Chandra Sekhar Mishra, Mohamed Metwally Mahmoud, Daniel Eutyche Mbadjoun Wapet, Abdulrahman Al Ayidh, Ahmed Althobaiti, Hany S Hussein, Thamer AH Alghamdi, Ahmed M Ewais   +11 more
doaj   +2 more sources

Comparing Undecimated Wavelet, Nonsubsampled Contourlet and Shearlet for Sar Images Despeckling [PDF]

Majlesi Journal of Electrical Engineering
Synthetic Aperture Radar (SAR) images suffer of multiplicative speckle noise, which damages the radiometric resolution of SAR images and makes the data interpretation difficult.
Saeed Jafari, Sedigheh Ghofrani, M. Sheikhan   +2 more
doaj   +1 more source

A New Method for Detecting Architectural Distortion in Mammograms by NonSubsampled Contourlet Transform and Improved PCNN [PDF]

Applied Sciences, 2019
Breast cancer is the leading cause of cancer death in women, and early detection can reduce mortality. Architectural distortion (AD) is a feature of clinical manifestations for breast cancer, however, due to its complex structure and low detection ...
Guangming Du, Min Dong, Yi Sun, Shuyi Li, Xiaomin Mu, Hongbin Wei, Lei Ma, Bang Liu   +7 more
doaj   +2 more sources

Multimodal Brain Image Fusion Based on Improved Rolling Guidance Filter and Wiener Filter. [PDF]

Comput Math Methods Med, 2022
Medical image fusion technology can integrate complementary information from different modality medical images to provide a more complete and accurate description of the specific diagnosed object, which is very helpful for image‐guided clinical diagnosis and treatment.
Lin H, Song Y, Wang H, Xie L, Li D, Yang G.   +5 more
europepmc   +2 more sources

Multiresolution-Based Singular Value Decomposition Approach for Breast Cancer Image Classification.

Biomed Res Int, 2022
Breast cancer is the most prevalent form of cancer that can strike at any age; the higher the age, the greater the risk. The presence of malignant tissue has become more frequent in women. Although medical therapy has improved breast cancer diagnostic and treatment methods, still the death rate remains high due to failure of diagnosing breast cancer in
Mann S, Bindal AK, Balyan A, Shukla V, Gupta Z, Tomar V, Miah S.   +6 more
europepmc   +2 more sources