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- Author:
- Magno, Ramona; Rocchi, Leandro; Dainelli, Riccardo; Matese, Alessandro; Di Gennaro, Salvatore Filippo; Chen, Chi-Farn; Son, Nguyen-Thanh; Toscano, Piero
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- Maja; accuracy; administrative management; agroecosystems; algorithms; computer software; detection; issues and policy; precision; precision agriculture
- Abstract:
- ... Remote sensing for precision agriculture has been strongly fostered by the launches of the European Space Agency Sentinel-2 optical imaging constellation, enabling both academic and private services for redirecting farmers towards a more productive and sustainable management of the agroecosystems. As well as the freely and open access policy adopted by the European Space Agency (ESA), software and ...
- DOI:
- 10.3390/rs13061219
-
http://dx.doi.org/10.3390/rs13061219
- Author:
- Fan, Pan; Lang, Guodong; Yan, Bin; Lei, Xiaoyan; Guo, Pengju; Liu, Zhijie; Yang, Fuzeng
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- accuracy; apples; artificial intelligence; color; information; lighting; orchards; paper; vision
- Abstract:
- ... In recent years, many agriculture-related problems have been evaluated with the integration of artificial intelligence techniques and remote sensing systems. The rapid and accurate identification of apple targets in an illuminated and unstructured natural orchard is still a key challenge for the picking robot’s vision system. In this paper, by combining local image features and color information, ...
- DOI:
- 10.3390/rs13061211
-
http://dx.doi.org/10.3390/rs13061211
- Author:
- Rabab, Saba; Breen, Edmond; Gebremedhin, Alem; Shi, Fan; Badenhorst, Pieter; Chen, Yi-Ping Phoebe; Daetwyler, Hans D.
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- Lolium perenne; accuracy; algorithms; area; automation; correlation; environment; extraction; normalized difference vegetation index; paper; phenomics; weight
- Abstract:
- ... The extraction of automated plant phenomics from digital images has advanced in recent years. However, the accuracy of extracted phenomics, especially for individual plants in a field environment, requires improvement. In this paper, a new and efficient method of extracting individual plant areas and their mean normalized difference vegetation index from high-resolution digital images is proposed. ...
- DOI:
- 10.3390/rs13061212
-
http://dx.doi.org/10.3390/rs13061212
- Author:
- Gu, Yang; Si, Bingfeng; Liu, Bushi
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- accuracy; algorithms; artificial intelligence; data collection; detection; environment; extraction; image analysis; information; models; paper; research; transportation
- Abstract:
- ... As a popular research direction in the field of intelligent transportation, road detection has been extensively concerned by many researchers. However, there are still some key issues in specific applications that need to be further improved, such as the feature processing of road images, the optimal choice of information extraction and detection methods, and the inevitable limitations of detectio ...
- DOI:
- 10.3390/rs13061213
-
http://dx.doi.org/10.3390/rs13061213
- Author:
- Zhang, Haidong; Wang, Lingqing; Tian, Ting; Yin, Jianghai
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- agriculture; altitude; history; information; precision agriculture; satellites; spatial data; unmanned aerial vehicles; China
- Abstract:
- ... Precision agriculture relies on the rapid acquisition and analysis of agricultural information. An emerging method of agricultural monitoring is unmanned aerial vehicle low-altitude remote sensing (UAV-LARS), which possesses significant advantages of simple construction, strong mobility, and high spatial-temporal resolution with synchronously obtained image and spatial information. UAV-LARS could ...
- DOI:
- 10.3390/rs13061221
-
http://dx.doi.org/10.3390/rs13061221
- Author:
- Jia, Bowen; Hou, Shugui; Wang, Yetang
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- Landsat; data collection; extraction; flow; glaciers; ice; land; radar; topographic maps; topography; velocity; China
- Abstract:
- ... A glacier surge, which is quasi-periodic and involves rapid flow, is an abnormal glacier motion. Although some glaciers have been found to be surging, little is known about surging glaciers on the Tibetan Plateau (TP), especially the Central and Northern TP. Here, we found a surging glacier (GLIMS ID: G085885E34389N) on the Zangser Kangri ice field (ZK), Central TP, by means of the digital elevati ...
- DOI:
- 10.3390/rs13061220
-
http://dx.doi.org/10.3390/rs13061220
- Author:
- Azpiroz, Izar; Oses, Noelia; Quartulli, Marco; Olaizola, Igor G.; Guidotti, Diego; Marchi, Susanna
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- accuracy; administrative management; artificial intelligence; climate; geophysics; information; meteorological data; models; olives; phenology; prediction; reflectance; remote sensing; temperature; topographic slope
- Abstract:
- ... Machine-learning algorithms used for modelling olive-tree phenology generally and largely rely on temperature data. In this study, we developed a prediction model on the basis of climate data and geophysical information. Remote measurements of weather conditions, terrain slope, and surface spectral reflectance were considered for this purpose. The accuracy of the temperature data worsened when rep ...
- DOI:
- 10.3390/rs13061224
-
http://dx.doi.org/10.3390/rs13061224
- Author:
- Girotto, Manuela; Reichle, Rolf; Rodell, Matthew; Maggioni, Viviana
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- basins; climate; dynamics; estimation; evaporation; gravity; groundwater; mass; models; rain; runoff; snow; soil water; stream flow; water storage
- Abstract:
- ... The Gravity Recovery and Climate Experiment (GRACE) mission and its Follow-On (GRACE-FO) mission provide unprecedented observations of terrestrial water storage (TWS) dynamics at basin to continental scales. Established GRACE data assimilation techniques directly adjust the simulated water storage components to improve the estimation of groundwater, streamflow, and snow water equivalent. Such tech ...
- DOI:
- 10.3390/rs13061223
-
http://dx.doi.org/10.3390/rs13061223
- Author:
- Gonçalves, Gil; Gonçalves, Diogo; Gómez-Gutiérrez, Álvaro; Andriolo, Umberto; Pérez-Alvárez, Juan Antonio
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- accuracy; cliffs; coasts; cost effectiveness; data collection; density; dynamics; flight; geometry; knowledge; paper; photogrammetry
- Abstract:
- ... Monitoring the dynamics of coastal cliffs is fundamental for the safety of communities, buildings, utilities, and infrastructures located near the coastline. Structure-from-Motion and Multi View Stereo (SfM-MVS) photogrammetry based on Unmanned Aerial Systems (UAS) is a flexible and cost-effective surveying technique for generating a dense 3D point cloud of the whole cliff face (from bottom to top ...
- DOI:
- 10.3390/rs13061222
-
http://dx.doi.org/10.3390/rs13061222
- Author:
- Benedict, Trenton D.; Brown, Jesslyn F.; Boyte, Stephen P.; Howard, Daniel M.; Fuchs, Brian A.; Wardlow, Brian D.; Tadesse, Tsegaye; Evenson, Kirk A.
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- algorithms; bias; detection; drought; geometry; normalized difference vegetation index; satellites; spectroradiometers; time series analysis; vegetation; water stress
- Abstract:
- ... Vegetation has been effectively monitored using remote sensing time-series vegetation index (VI) data for several decades. Drought monitoring has been a common application with algorithms tuned to capturing anomalous temporal and spatial vegetation patterns. Drought stress models, such as the Vegetation Drought Response Index (VegDRI), often use VIs like the Normalized Difference Vegetation Index ...
- DOI:
- 10.3390/rs13061210
-
http://dx.doi.org/10.3390/rs13061210
- Author:
- Zhang, Yachao; Lai, Xuan; Xie, Yuan; Qu, Yanyun; Li, Cuihua
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- algorithms; data collection; geometry; image analysis; models; multipliers; paper; polarimetry; synthetic aperture radar
- Abstract:
- ... In this paper, we propose a new discriminative dictionary learning method based on Riemann geometric perception for polarimetric synthetic aperture radar (PolSAR) image classification. We made an optimization model for geometry-aware discrimination dictionary learning in which the dictionary learning (GADDL) is generalized from Euclidian space to Riemannian manifolds, and dictionary atoms are comp ...
- DOI:
- 10.3390/rs13061218
-
http://dx.doi.org/10.3390/rs13061218
- Author:
- Cui, Xihong; Quan, Zhenxian; Chen, Xuehong; Zhang, Zheng; Zhou, Junxiong; Liu, Xinbo; Chen, Jin; Cao, Xin; Guo, Li
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- algorithms; data collection; ecosystems; edaphic factors; geophysics; ground-penetrating radar; literature; plant communities; research; rhizosphere; root growth; root systems; shape; shrubs; sounds; spatial distribution; surveys
- Abstract:
- ... The belowground root zone of influence (ZOI) is fundamental to the study of the root–root and root–soil interaction mechanisms of plants and is vital for understanding changes in plant community compositions and ecosystem processes. However, traditional root research methods have a limited capacity to measure the actual ZOIs within plant communities without destroying them in the process. This stu ...
- DOI:
- 10.3390/rs13061227
-
http://dx.doi.org/10.3390/rs13061227
- Author:
- Zhang, Fan; Zhao, Chenxi; Han, Songtao; Ma, Fei; Xiang, Deliang
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- correlation; information; interferometry; paper; streams; volume
- Abstract:
- ... Very Long Baseline Interferometry (VLBI) solution can yield accurate information of angular position, and has been successfully used in the field of deep space exploration, such as astrophysics, imaging, detector positioning, and so on. The increase in VLBI data volume puts higher demands on efficient processing. Essentially, the main step of VLBI is the correlation processing, through which the a ...
- DOI:
- 10.3390/rs13061226
-
http://dx.doi.org/10.3390/rs13061226
- Author:
- Li, Ziqi; Sun, Wenchao; Chen, Haiyang; Xue, Baolin; Yu, Jingshan; Tian, Zaifeng
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- Internet; Landsat; accuracy; administrative management; autumn; classification; climate; ecosystems; lakes; land cover; landscapes; phenology; reflectance; spatial distribution; spring; summer; surface area; time series analysis; variability; vegetation; water; water flow; wetlands; China
- Abstract:
- ... Hydrological connectivity is an important characteristic of wetlands that maintains the stability and functions of an ecosystem. This study investigates the temporal variations of hydrological connectivity and their driving mechanism in Baiyangdian Lake, a large shallow wetland in North China, using a time series of open water surface area data derived from 36 Landsat 8 multispectral images from 2 ...
- DOI:
- 10.3390/rs13061214
-
http://dx.doi.org/10.3390/rs13061214
- Author:
- Zhang, Xin; Du, Ling; Tan, Shen; Wu, Fangming; Zhu, Liang; Zeng, Yuan; Wu, Bingfang
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- accuracy; area; classification; decision support systems; information; land cover; land use; land use and land cover maps; models; pepper; regression analysis; spatial data; topography
- Abstract:
- ... Land use/land cover (LULC) change has been recognized as one of the most important indicators to study ecological and environmental changes. Remote sensing provides an effective way to map and monitor LULC change in real time and for large areas. However, with the increasing spatial resolution of remote sensing imagery, traditional classification approaches cannot fully represent the spectral and ...
- DOI:
- 10.3390/rs13061225
-
http://dx.doi.org/10.3390/rs13061225
- Author:
- León-Cruz, José Francisco; Carbajal Henken, Cintia; Carbajal, Noel; Fischer, Jürgen
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- area; climate; convection; drought; frequency; landscapes; meteorological data; population density; research; socioeconomics; spectroradiometers; summer; Gulf of Mexico; Mexico; Pacific Ocean
- Abstract:
- ... Complex terrain features—in particular, environmental conditions, high population density and potential socio-economic damage—make the Trans-Mexican Volcanic Belt (TMVB) of particular interest regarding the study of deep convection and related severe weather. In this research, 10 years of Moderate-Resolution Imaging Spectroradiometer (MODIS) cloud observations are combined with Climate Hazards Gro ...
- DOI:
- 10.3390/rs13061215
-
http://dx.doi.org/10.3390/rs13061215
- Author:
- Ding, Zhi; Zheng, Hui; Liu, Ying; Zeng, Sidong; Yu, Pujia; Shi, Wei; Tang, Xuguang
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- Earth system science; afforestation; area; dynamics; ecological restoration; ecosystems; grasses; gross primary productivity; land use; spectroradiometers; vegetation; China
- Abstract:
- ... Large-scale ecosystem restoration projects (ERPs) have been implemented since the beginning of the new millennium to restore vegetation and improve the ecosystem in Southwest China. However, quantifying the effects of specific restoration activities, such as afforestation and grass planting, on vegetation recovery is difficult due to their incommensurable spatiotemporal distribution. Long-term and ...
- DOI:
- 10.3390/rs13061209
-
http://dx.doi.org/10.3390/rs13061209
- Author:
- Gao, Xiuhe; Xiong, Shengqing; Yu, Changchun; Zhang, Dishuo; Wu, Chengping
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- accuracy; area; case studies; estimation; extraction; information; magnetism; magnetite; theoretical models; volume; China
- Abstract:
- ... In the Qihe area, the magnetic anomalies caused by deep and concealed magnetite are weak and compared with ground surveys, airborne surveys further weaken the signals. Moreover, the magnetite in the Qihe area belongs to a contact-metasomatic deposit, and the magnetic anomalies caused by the magnetite and its mother rock overlap and interweave. Therefore, it is difficult to directly delineate the t ...
- DOI:
- 10.3390/rs13061216
-
http://dx.doi.org/10.3390/rs13061216
- Author:
- Philipp, Marius; Dietz, Andreas; Buchelt, Sebastian; Kuenzer, Claudia
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- Internet; carbon; carbon sinks; climate change; deformation; degradation; environment; frequency; greenhouse gas emissions; greenhouse gases; humans; infrastructure; lidar; methane; permafrost; remote sensing; satellites; Arctic region
- Abstract:
- ... Climate change and associated Arctic amplification cause a degradation of permafrost which in turn has major implications for the environment. The potential turnover of frozen ground from a carbon sink to a carbon source, eroding coastlines, landslides, amplified surface deformation and endangerment of human infrastructure are some of the consequences connected with thawing permafrost. Satellite r ...
- DOI:
- 10.3390/rs13061217
-
http://dx.doi.org/10.3390/rs13061217
- Author:
- Yu, Linfei; Leng, Guoyong; Python, Andre; Peng, Jian
- Source:
- Remote Sensing 2021 v.13 no.6
- ISSN:
- 2072-4292
- Subject:
- accuracy; correlation; detection; estimation; frequency; probability; rain; rivers; China
- Abstract:
- ... This study evaluated the performance of the early, late and final runs of IMERG version 06 precipitation products at various spatial and temporal scales in China from 2008 to 2017, against observations from 696 rain gauges. The results suggest that the three IMERG products can well reproduce the spatial patterns of precipitation, but exhibit a gradual decrease in the accuracy from the southeast to ...
- DOI:
- 10.3390/rs13061208
-
http://dx.doi.org/10.3390/rs13061208
