نتایج جستجو برای: other remote sensing techniques

تعداد نتایج: 2408042  

Journal: :international journal of aquatic biology 0
shirkou jaafari faculty of natural resources, university of tehran, karaj, iran. afshin alizadeh shabani faculty of natural resources, university of tehran, karaj, iran. afshin danehkar faculty of natural resources, university of tehran, karaj, iran.

the study on water level fluctuation in the urmia lake has become of a great importance in recent years. this is due to the importance of the position of this lake as a natural heritage at an international level. the water level decrease at the urmia lake during the recent years has made it necessary to address the matter more than before. investigation and assessment of changes in the lake is ...

Journal: :journal of mining and environment 2013
saeed mojeddifar hojatollah ranjbar hossain nezamabadipour

the main problem associated with the traditional approach to image classification for the mapping of hydrothermal alteration is that materials not associated with hydrothermal alteration may be erroneously classified as hydrothermally altered due to the similar spectral properties of altered and unaltered minerals. the major objective of this paper is to investigate the potential of a neuro-fuz...

ژورنال: علوم آب و خاک 2020

Agricultural water management studies require accurate information on actual evapotranspiration. This information must have sufficient spatial detail to allow analysis on the farm or basin level. The methods used to estimate evapotranspiration are grouped into two main groups, which include direct methods and indirect or computational methods. Basics of the indirect methods are based on the rel...

2012
NICOLAS H. YOUNAN ROGER L. KING

T HE constant increase in the amount of remotely sensed images as well as the urgent need for the extraction of useful information from such data sets have made the development of new pattern recognition techniques a popular research topic for several decades. This data volume, together with the complexity of the content acquired by a diverse set of sensors, require new interdisciplinary work i...

2011
Peter J M Clive

Remote sensing technologies such as SoDAR and LiDAR have proved to be cost-effective methods of acquiring critical project datasets from locations that present access challenges. As a result they are increasingly being adopted in the offshore environment where their compact, portable and robust characteristics can be maximally leveraged to acquire data that previously would have represented gre...

2002
Chuin-Mu Wang Chi-Chang Chen Sheng-Chi Yang Pau-Choo Chung Ching-Wen Yang

Chein-I Chang, FELLOW SPIE University of Maryland Baltimore County Remote Sensing Signal and Image Processing Laboratory Department of Computer Science and Electrical Engineering Baltimore, Maryland 21250 E-mail: [email protected] Abstract. MR images and remotely sensed images share similar image structures and characteristics because they are acquired remotely as image sequences by spectral chan...

2015
Zhen Zhou Jingfeng Huang Jing Wang Kangyu Zhang Zhaomin Kuang Shiquan Zhong Xiaodong Song Frank Alexander Feltus

Most areas planted with sugarcane are located in southern China. However, remote sensing of sugarcane has been limited because useable remote sensing data are limited due to the cloudy climate of this region during the growing season and severe spectral mixing with other crops. In this study, we developed a methodology for automatically mapping sugarcane over large areas using time-series middl...

Introduction: As a valuable asset that play a key role in the environment, natural resources, and the production of agricultural products, soil provided an appropriate ground for plant growth and vegetation development. Therefore, any disregard to the preservation of such a valuable capital may result in food shortages, soil erosion, and degradation of natural resources. From among different i...

Journal: :CoRR 2009
Priti Maheswary Namita Srivastava

Grouping images into semantically meaningful categories using low-level visual feature is a challenging and important problem in content-based image retrieval. The groupings can be used to build effective indices for an image database. Digital image analysis techniques are being used widely in remote sensing assuming that each terrain surface category is characterized with spectral signature ob...

Journal: :American Journal of Geographic Information System 2012

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