Results 41 to 50 of about 1,445,591 (343)

Phenology-Based Vegetation Index Differencing for Mapping of Rubber Plantations Using Landsat OLI Data

open access: yesRemote Sensing, 2015
Accurate and up-to-date mapping and monitoring of rubber plantations is challenging. In this study, we presented a simple method for rapidly and accurately mapping rubber plantations in the Xishuangbanna region of southwest China using phenology-based ...
Hui Fan   +3 more
doaj   +1 more source

An Automatic Multilevel Image Thresholding Using Relative Entropy and Meta-Heuristic Algorithms

open access: yesEntropy, 2013
Multilevel thresholding has been long considered as one of the most popular techniques for image segmentation. Multilevel thresholding outputs a gray scale image in which more details from the original picture can be kept, while binary thresholding can ...
Josue R. Cuevas, Yun-Chia Liang
doaj   +1 more source

A machine-learning approach to setting optimal thresholds and its application in rolling bearing fault diagnosis

open access: yesMachine Learning: Science and Technology, 2023
Bearings are one of the critical components of any mechanical equipment. They induce most equipment faults, and their health status directly impacts the overall performance of equipment.
Yao-Chi Tang, Kuo-Hao Li
doaj   +1 more source

Image-Based Concrete Crack Detection Method Using the Median Absolute Deviation

open access: yesSensors
This paper proposes an innovative approach for detecting and quantifying concrete cracks using an adaptive threshold method based on Median Absolute Deviation (MAD) in images.
Juan Camilo AvendaƱo   +2 more
doaj   +1 more source

Anomaly Detection in Multichannel Data Using Sparse Representation in RADWT Frames

open access: yesMathematics, 2021
We introduce a new methodology for anomaly detection (AD) in multichannel fast oscillating signals based on nonparametric penalized regression. Assuming the signals share similar shapes and characteristics, the estimation procedures are based on the use ...
Daniela De Canditiis, Italia De Feis
doaj   +1 more source

Flood Detection with SAR: A Review of Techniques and Datasets

open access: yesRemote Sensing
Floods are among the most severe and impacting natural disasters. Their occurrence rate and intensity have been significantly increasing worldwide in the last years due to climate change and urbanization, bringing unprecedented effects on human lives and
Donato Amitrano   +3 more
doaj   +1 more source

Improved Degraded Document Image Binarization Using Median Filter for Background Estimation

open access: yesElektronika ir Elektrotechnika, 2018
In this paper, we propose a new binarization method suitable for images having a variety of sizes and degradation levels. It is mainly based on the idea of estimating a document background surface by new smoothing approach through a median filter and ...
Mehdi Khitas   +2 more
doaj   +1 more source

Alternative Thresholding Technique for Image Segmentation Based on Cuckoo Search and Generalized Gaussians

open access: yesMathematics, 2021
Object segmentation is a widely studied topic in digital image processing, as to it can be used for countless applications in several fields. This process is traditionally achieved by computing an optimal threshold from the image intensity histogram ...
Jorge Munoz-Minjares   +3 more
doaj   +1 more source

An Adaptive Management Model for Brown Bears in Hokkaido: Based on Total Population and the Number of Nuisance Bears

open access: yesPopulation Ecology, EarlyView.
Bear management changes management actions according to the horizontal axis of the population size and the vertical axis of the number of nuisance bears. Aiming for the target population size of Ntar, Actions I and II protect the bears, and Action IV reduces the population.
Hiroyuki Matsuda   +5 more
wiley   +1 more source

Image Bi-Level Thresholding Based on Gray Level-Local Variance Histogram

open access: yesEntropy, 2017
Thresholding is a popular method of image segmentation. Many thresholding methods utilize only the gray level information of pixels in the image, which may lead to poor segmentation performance because the spatial correlation information between pixels ...
Xiulian Zheng, Hong Ye, Yinggan Tang
doaj   +1 more source

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