نتایج جستجو برای: satellite imagery

تعداد نتایج: 121483  

2011
Sergio Bernabé Antonio Plaza

The wealth of satellite imagery [1] available in web mapping service applications such as Google Maps, which now provides high-resolution satellite images from many locations around the Earth, has opened the appealing perspective of performing classification and retrieval tasks via programming libraries such as SwingX-WS. In fact, the introduction of Google’s mapping engine prompted a worldwide...

2009
M. T. GEBRESLASIE F. B. AHMED JAN A. N. VAN AARDT F. BLAKEWAY

cially in homogeneous, even-aged plantation scenarios. Airborne imagery has mainly been used for detection of individual trees using local maxima filtering, as point spread function and signal-to-noise ratio are smaller than with satellite-borne imagery. This led to the development of a novel approach to local maxima filtering for tree detection in plantation forests in KwaZulu-Natal, South Afr...

2010
Robert G. Morris John L. Worrall

Researchers have not yet devoted sufficient attention to the effect of prison architecture on inmate misconduct. Using data from the population of male prisoners in Texas, the authors explored the association between two prison architectural design types (as determined by satellite imagery) and inmate misconduct. The results from multilevel statistical analyses suggest that architectural design...

2012
Robert Hudjakov Mart Tamre

the purpose of our research is to improve navigation capabilities of an Unmanned Ground Vehicle (UGV) by increasing its perception range utilizing aerial or satellite imagery. We propose an adaptive system that consists of an image classifier, cost map generator and path planner, which is used for long-term path planning using overhead imagery.

2008
Michael L. Hoppus Mark V. Finco

The panchromatic bands of Landsat 7, SPOT, and IRS satellite imagery provide an opportunity to evaluate the effectiveness of texture analysis of satellite imagery for mapping of land uselcover, especially forest cover. A variety of texture algorithms, including standard deviation, Ryherd-Woodcock minimum variance adaptive window, low pass etc., were applied to moving 3x3 and 7x7 pixel windows. ...

2017
Walter Meier Michael Van Woert Cheryl Bertoia

The United States National Ice Center (NIC) provides weekly ice analyses of the Arctic and Antarctic using information from ice reconnaissance, ship reports and high-resolution satellite imagery. In cloud-covered areas and regions lacking imagery, the higher-resolution sources are augmented by ice concentrations derived from Defense Meteorological Satellite Program (DMSP) Special Sensor Microwa...

Successful target detection, especially if there is a similarity between the target and the background area, always is a noticeable issue in remote sensing studies. Because of the spectral behavior similarity to the other phenomena and spatial distribution of these units, the mapping of wind erosion units is difficult. Thus, this study attempts to detect the favorable areas by using matched fil...

ژورنال: مهندسی دریا 2010
آل شیخ, علی اصغر, صداقت, امین, محمدی, نازیلا, ملک, محمدرضا,

The objective of this paper is to introduce a new method for coastlines delineation from high-resolution satellite images automatically. The proposed approach integrates the color histogram analysis for estimating the number of clusters, fuzzy c-partition, and genetic algorithms for optimizing fuzzy c-partition matrix. The imagery is classified into homogenous areas using the proposed fuzzy log...

2002
Richard Selby

The aim of this tutorial is to show how to easily create a Digital Elevation Model (DEM) and orthorectified image from free ASTER satellite imagery. PCI Geomatica OrthoEngine is the software package used to perform the processing. The imagery used in this tutorial is from Southern Scotland, around Loch Doon in the United Kingdom. These web sites provide contextual pictures of the area….

2001
Ron Abileah

A new era of commercial high-resolution imagery from space began late in 1999 resulting in resolution that is now sufficient to resolve marine mammals. This encouraged investigating the use of satellite imagery for marine-mammal population census and related studies. The question was raised: Can marine mammals be reliably detected above sensor noise and ocean clutter? To answer this question, a...

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