Results 11 to 20 of about 100,332 (258)

Analysis of the Impact of Positional Accuracy When Using a Single Pixel for Thematic Accuracy Assessment

open access: yesRemote Sensing, 2020
The primary goal of thematic accuracy assessment is to measure the quality of land cover products and it has become an essential component in global or regional land cover mapping.
Jianyu Gu, Russell G. Congalton
doaj   +3 more sources

Automatic Extraction Method of Green Tide Based on Mixed Pixel Decomposition Feedback Adjustment

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Since 2007, recurring green tides in the Yellow Sea have caused substantial ecological and socioeconomic impacts. Accurate and efficient automated extraction from remote sensing images is vital for monitoring these events.
Dongxue Li   +4 more
doaj   +2 more sources

Employing both full and partial sub-pixel mapping methods to delineate hydrothermal alteration zones associated with porphyry copper deposits

open access: yesEgyptian Journal of Remote Sensing and Space Sciences
The southeastern portion of the Urumieh–Dokhtar magmatic arc (UDMA), known as Kerman Cenozoic magmatic arc (KCMA), is a major host to world-class giant to subeconomic small porphyry copper deposits (PCDs) in Iran.
Yousef Bahrami   +2 more
doaj   +2 more sources

Change Detection for Hyperspectral Images Via Convolutional Sparse Analysis and Temporal Spectral Unmixing

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
With the increase in the availability of multitemporal hyperspectral images (HSIs), HSIs change detection (CD) methods, including pixel-level and subpixel-level based methods, have attracted great attention in recent years.
Qingle Guo   +3 more
doaj   +1 more source

A New Elbow Estimation Method for Selecting the Best Solution in Sparse Unmixing

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
The goal of hyperspectral image analysis is often to determine which materials, out of a given set of possibilities, are present in each pixel. As hyperspectral data are being gathered in rapidly increasing amounts, automatic image analysis is becoming ...
Risto Sarjonen, Tomi Raty
doaj   +1 more source

MAPPING FOREST DISTURBANCE USING PURE FOREST INDEX TIME SERIES AND CCDC ALGORITHM [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Forest dynamics are closely related to climate change, natural disasters, and ecological diversity. The accumulated Landsat archive provides an unprecedented opportunity for long-term forest dynamics monitoring globally.
Y. Cai, Q. Shi, X. Liu
doaj   +1 more source

Estimation of the Conifer-Broadleaf Ratio in Mixed Forests Based on Time-Series Data

open access: yesRemote Sensing, 2021
Most natural forests are mixed forests, a mixed broadleaf-conifer forest is essentially a heterogeneously mixed pixel in remote sensing images. Satellite missions rely on modeling to acquire regional or global vegetation parameter products.
Ranran Yang   +4 more
doaj   +1 more source

Low-dose CT Reconstruction Algorithm Based on Iterative Asymmetric Blind Spot Network [PDF]

open access: yesJisuanji kexue, 2023
Aiming at the problem that the method of low-dose CT reconstruction by machine learning method relies too much on pairwise legends,a low-dose CT reconstruction algorithm based on iterative asymmetric blind spot network is proposed.Firstly,low-dose CT is ...
GUO Guangxing, YIN Guimei, LIU Chenxu, DUAN Yonghong, QIANG Yan, WANG Yanfei, WANG Tao
doaj   +1 more source

INFRARED ROTATION PLANE RADAR CHANGE DETECTION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
The existing change detection method mainly stays on the pixel-level, which is very susceptible to light, shadow, etc. And the complex calculation and analysis for each pixel reduce the detection efficiency.
Y. Wang   +5 more
doaj   +1 more source

Discriminating small wooded elements in rural landscape from aerial photography: a hybrid pixel/object-based analysis approach [PDF]

open access: yes, 2009
While small, fragmented wooded elements do not represent a large surface area in agricultural landscape, their role in the sustainability of ecological processes is recognized widely.
Ouin, Annie   +5 more
core   +1 more source

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