Clouds can be classified either according to their form (i.e., cirrus, cumulus, and stratus) or their height (low, medium, and high clouds). The height of low clouds varies from 0 up to 6500 ft (2 km); medium clouds from 6500 to 13,000 ft (2–4 km) in polar regions and up ...
If height difference between minimum Z value of the cell and other point of cell is less than tolerance point classification is same as cell classification and if not point classification is opposite as cell classification. Five samples of llermanni study area was used to assess the accuracy of...
A unified framework is proposed for classifying the MLS point clouds based on segments. A set of features for each segment are well-designed, which can be used to effectively distinguish nine common object classes in urban street scenes. A publicly available point cloud dataset with ground truth ...
This study classified the lower body types of female adults aged 18 to 69. The lower body was divided into front, lateral front, and lateral back. In order to understand the shape and somatotype of each segment, 592 people were analyzed based on girth, height, length, depth, width, angle...
Often it is hard to identify clouds in Antarctica, either because of blowing snow, very thin cirrus cloud cover, or the absence of daylight in winter. Satellite imagery provides no better solution, due to the similarity of the bright temperatures of the snow and clouds. However, the combinatio...
Standard cloud algorithms rely on multispectral signatures to identify high, medium, and low clouds. In contrast, the present study classifies stratocumulu... RM Welch,SK Sengupta,DW Chen - 《Journal of Geophysical Research》 被引量: 110发表: 1988年 Classifying individual tree genera using stepwis...
Cloud profiles are grouped based on the combination of a time-height clustering method and the k-means clustering method. The cloud classification algorithm, developed using a fuzzy logic method, uses nine physical parameters to classify clouds into nine types: cirrostratus, cirrocumulus, altocumulus,...
Therefore, three subtypes of fair-weather cumulus clouds are identified based on the nature of their interaction with the mixed layer: forced, active and passive clouds. Forced clouds, the visible tracers within the tops of some mixed-layer thermals, are totally embedded within the mixed layer. ...
Knowing that visible-light images of clouds contain thickness related information, while infrared images haves height-related information, we propose a two-layered fuzzy logic based on the input source to provide us with a relatively clear-cut threshold in classification. Traditional noise-removal ...
of all points for building detection is to reduce the influence of tree points close to the building facades on building extraction. This method can also be extended to transform point clouds in different views into binary images for various other object extractions. In order to ensure the ...