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Height-Gradient-Based Method for Occlusion Detection in True Orthophoto Generation
(Ieee-inst Electrical Electronics Engineers Inc, 2015-11-01)
High-quality orthophotos are essential elements in cartographic databases that are required for engineering projects. Urban areas usually have many tall buildings, causing occlusions in aerial images. These occlusions can ...
Height gradient approach for occlusion detection in UAV imagery
(2015-01-01)
The use of Unmanned Aerial Vehicle (UAV) significantly increased in the last years. It is used for several different applications, such as mapping, publicity, security, natural disasters assistance, environmental monitoring, ...
Integrated marine gravity field in the Brazilian coast from altimeter-derived sea surface gradient and shipborne gravity
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)
Sea surface gradients derived from the Geosat and ERS-1 satellite altimetry geodetic missions were integrated with marine gravity data from the National Geophysical Data Center and Brazilian national surveys. Using the ...
OCCLUSION DETECTION BY HEIGHT GRADIENT FOR TRUE ORTHOPHOTO GENERATION, USING LIDAR DATA
(Copernicus Gesellschaft Mbh, 2013-01-01)
Nowadays, the use of orthophoto in urban areas has become common. It is known that in most parts of urban areas there are a great number of tall buildings which can cause occlusion regions during image acquisition. These ...
Occlusion detection by height gradient for true orthophoto generation, using LiDAR data
(2013-01-01)
Nowadays, the use of orthophoto in urban areas has become common. It is known that in most parts of urban areas there are a great number of tall buildings which can cause occlusion regions during image acquisition. These ...
Forest cover change analysis based on temporal gradients of the vertical structure and density
(2021-07-01)
Canopy height is an important attribute that allows characterizing the forest vertical structure and analyze changes in vegetation cover over time. The objective of this study is to develop an approach for a spatio-temporal ...
JUVENILE HEIGHT GROWTH RATES AND SORTING OF THREE NOTHOFAGUS SPECIES ON AN ALTITUDINAL GRADIENT
(Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, 2002)
Spatial and Temporal Features of the Topside Ionospheric Electron Density by a New Model Based On GPS Radio Occultation Data
(2018-03-01)
A new method for probing the spatial and temporal features of the topside ionosphere is presented. The Vary-Chap model given by linear functions was used to discover and report features of the topside scale height and its ...
Height-diameter relationships of tropical Atlantic moist forest trees in southeastern Brazil
(UNIV SÃO PAULOPIRACICABA, 2013-08-02)
Site-specific height-diameter models may be used to improve biomass estimates for forest inventories where only diameter at breast height (DBH) measurements are available. In this study, we fit height-diameter models for ...
Diversidade de ácaros (Arachnida: Acari) em Hymenaea martiana (Leguminosae) em gradiente de tamanho de plantas
(Instituto Virtual da Biodiversidade (BIOTA/FAPESP), 2010-12-01)
Foram estudadas as comunidades de ácaros em indivíduos de Hymenaea martiana Hayne (Leguminosae) com diferentes tamanhos, localizados em fragmento de Mata Estacional Semidecidual com transição para o Cerrado. As plantas ...