نتایج جستجو برای: forest ground

تعداد نتایج: 243888  

2018
Konstantinos Batsos Changjiang Cai Philippos Mordohai

Recently, there has been a paradigm shift in stereo matching with learning-based methods achieving the best results on all popular benchmarks. The success of these methods is due to the availability of training data with ground truth; training learning-based systems on these datasets has allowed them to surpass the accuracy of conventional approaches based on heuristics and assumptions. Many of...

Journal: :Remote Sensing 2017
Zhenfeng Shao Juan Deng Lei Wang Yewen Fan Neema S. Sumari Qimin Cheng

Cloud detection of remote sensing imagery is quite challenging due to the influence of complicated underlying surfaces and the variety of cloud types. Currently, most of the methods mainly rely on prior knowledge to extract features artificially for cloud detection. However, these features may not be able to accurately represent the cloud characteristics under complex environment. In this paper...

Journal: :Remote Sensing 2015
Elfatih M. Abdel-Rahman David M. Makori Tobias Landmann Rami Piiroinen Seif Gasim Petri Pellikka Suresh K. Raina

Knowledge of the floral cycle and the spatial distribution and abundance of flowering plants is important for bee health studies to understand the relationship between landscape and bee hive productivity and honey flow. The key objective of this study was to show how AISA Eagle hyperspectral data and random forest (RF) can be optimally utilized to produce flowering and spatially explicit land u...

2015
Qaiser Mahmood Abdul Basit

This paper presents an automated segmentation framework for ischemic stroke lesion segmentation in multi-spectral MRI images. The framework is based on a random forests (RF), which is an ensemble learning technique that generates several classifiers and combines their results in order to make decisions. In RF, we employ several meaningful features such as intensities, entropy, gradient etc. to ...

Journal: :Ecology letters 2013
Gregory R Goldsmith Nicholas J Matzke Todd E Dawson

Although clouds are the most recognisable and defining feature of tropical montane cloud forests, little research has focussed on how clouds affect plant functioning. We used satellite and ground-based observations to study cloud and leaf wetting patterns in contrasting tropical montane and pre-montane cloud forests. We then studied the consequences of leaf wetting for the direct uptake of wate...

2017
Steve Frolking Stephen Hagen Bobby Braswell Tom Milliman Christina Herrick Seth Peterson Dar Roberts Michael Keller Michael Palace

Amazonia has experienced large-scale regional droughts that affect forest productivity and biomass stocks. Space-borne remote sensing provides basin-wide data on impacts of meteorological anomalies, an important complement to relatively limited ground observations across the Amazon's vast and remote humid tropical forests. Morning overpass QuikScat Ku-band microwave backscatter from the forest ...

2014
Hamid Hamraz Jun Zhang Marco A. Contreras

Building up forest inventories for performing forest management is currently done manually through field cruises and interpretation of the aerial imagery, which is a labor-intensive task. Airborne lidar technology is capable of building a point cloud off the top surface of the ground objects. Modeling urban areas from the lidar has been successfully accomplished. However, for forest modeling, t...

2014
Jérémy S P Froidevaux Florian Zellweger Kurt Bollmann Martin K Obrist

Passive acoustic methods are increasingly used in biodiversity research and monitoring programs because they are cost-effective and permit the collection of large datasets. However, the accuracy of the results depends on the bioacoustic characteristics of the focal taxa and their habitat use. In particular, this applies to bats which exhibit distinct activity patterns in three-dimensionally str...

2016
Andimuthu Ramachandran Parthasarathy Radhapriya Shanmuganathan Jayakumar Praveen Dhanya Rajadurai Geetha Madhur Anand

India has one of the largest assemblages of tropical biodiversity, with its unique floristic composition of endemic species. However, current forest cover assessment is performed via satellite-based forest surveys, which have many limitations. The present study, which was performed in the Eastern Ghats, analysed the satellite-based inventory provided by forest surveys and inferred from the resu...

2008
J. Albert E. Aliu P. Antoranz C. Baixeras J. A. Barrio R. K. Bock M. Hayashida E. Lindfors M. Pasanen M. Shayduk L. Takalo M. Teshima D. F. Torres N. Turini H. Vankov A. Venturini R. M. Wagner

The paper describes an application of the tree classification method Random Forest (RF), as used in the analysis of data from the ground-based gamma telescope MAGIC. In such telescopes, cosmic γ-rays are observed and have to be discrimi-

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