نتایج جستجو برای: maximum likelihood classifier

تعداد نتایج: 398600  

ژورنال: علوم آب و خاک 2011
علیرضا سفیانیان , , ملیحه السادات مدنیان, ,

Land cover maps derived from satellite images play a key role in regional and national land cover assessments. In order to compare maximum likelihood and minimum distance to mean classifiers, LISS-III images from IRS-P6 satellite were acquired in August 2008 from the western part of Isfahan. First, the LISS-III image was georeferenced. The Root Mean Square error of less than one pixel was the r...

Journal: :desert 0
m. shirazi m.sc graduate, university of tehran, karaj, iran gh.r. zehtabian professor, university of tehran, karaj, iran h.r. matinfar assistant professor, university of lorestan, khoram abad, iran s.k. alavipanah professor, university of tehran, tehran, iran

soil salinity has been a large problem in arid and semi arid regions. preparation of such maps is useful for natural resource managers. old methods of preparing such maps require a lot of time and cost. multi-spectral remotely sensed dates due to the broad vision and repeating of these imageries is suitable for provide saline soil maps. this investigation is conducted to provide saline soil map...

2010
M. K. Ghose Ratika Pradhan Sucheta Sushan Ghose

In this paper an attempt has been made to develop a decision tree classification algorithm for remotely sensed satellite data using the separability matrix of the spectral distributions of probable classes in respective bands. The spectral distance between any two classes is calculated from the difference between the minimum spectral value of a class and maximum spectral value of its preceding ...

2002
Kaizhu Huang Irwin King

In this paper, we propose a technique to construct a sub-optimal semi-naive Bayesian network when given a bound on the maximum number of variables that can be combined into a node. We theoretically show that our approach has a less computation cost when compared with the traditional semi-naive Bayesian network. At the same time, we can obtain a resulting sub-optimal structure according to the m...

Journal: :محیط زیست طبیعی 0
میترا شیرازی کارشناسی ارشد بیابان زدایی، دانشگاه تهران، ایران غلامرضا زهتابیان استاد دانشکده منابع طبیعی، دانشگاه تهران، ایران سید کاظم علوی پناه استاد دانشکده جغرافیا، دانشگاه تهران، ایران

multi-spectral remotely sensed data is useful information source for the detection of surface changes and change detection is a major application of the remotely sensed data. this study is conducted to investigate capability of sensor liss-iii of irs-p6resource satellite data for providing land cover map, in najm abad of savojbolagh region with 20000 ha area. the images of 26th june, 2006 were ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده علوم طبیعی 1393

: ناحیه فضای رونویسی داخلی(its) به طور گسترده در سطوح مختلف تاکسونومیکی در مطالعات فیلوژنی استفاده می شود. سه گونه از جنس ribes در جنگل های ارسباران شناخته شده است. روابط فیلوژنی بین این سه گونه r. biebersteinii، r. oriental،r. uva-crispa روشن نشده است. در این مطالعه، روابط فیلوژنی مبتنی بر صفات موفولوژیکی (رنگ میوه،کرکدار بودن برگ،خار در شاخه و ....) و توالی نوکلئوتیدی nrdna its ، این گونه ها ...

Journal: :Systematic Biology 2008

2015
Madhura M Suganthi Venkatachalam

This paper presents classification of various land cover types from the raw satellite image using supervised classifiers and performances of the classifiers are analyzed. Geo coded and Geo-referenced remote sensed images from Survey of India, Government of India Topographical maps are used. Prior to classification, Training process to assemble a set of statistics describing spectral response pa...

Journal: :Artif. Intell. Research 2013
Timothy Kelman Jinchang Ren Stephen Marshall

Maximum likelihood and neural classifiers are two typical techniques in image classification. This paper investigates how to adapt these approaches to hyperspectral imaging for the classification of five kinds of Chinese tea samples, using visible light hyperspectral spectroscopy rather than near-infrared. After removal of unnecessary parts from each imaged tea sample using a morphological crop...

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