نتایج جستجو برای: textural analysis

تعداد نتایج: 2828351  

2003
Leena Lepistö Iivari Kunttu Jorma Autio Ari Visa

Texture analysis and classification are usual tasks in pattern recognition. Rock texture is a demanding classification task, because the texture is often non-homogenous. In this paper, we introduce a rock texture classification method, which is based on textural and spectral features of the rock. The spectral features are considered as some color parameters whereas the textural features are cal...

1999
George F. Hepner Bijan Houshmand Igor Kulikov Nevin Bryant Bijan Jet Houshmand Ivan Kulikov

Understanding urban structures and processes is increasingly important as cities become the home of more of the earth’s population. This paper describes the use of a study area in Los Angeles, California to test the potential for integrative use of Interferometric Synthetic Aperature Radar (IFSAR) and Airborne Visible / Infrared Imaging Spectrometer (AVIRIS) hyperspectral imagery for analysis o...

2007
Spiros Kostopoulos Dionisis A. Cavouras Antonis Daskalakis Ioannis Kalatzis Panagiotis Bougioukos George C. Kagadis Panagiota Ravazoula George Nikiforidis

An image analysis system (IAS) was developed for the quantitative assessment of estrogen receptor’s (ER) positive status from breast tissue microscopy images. Twenty-four cases of breast cancer biopsies, immunohistochemically (IHC) stained for ER, were microscopically assessed by a histopathologist, following a clinical routine scoring protocol. Digitized microscopy views of the specimens were ...

2004
N. S. Visen

Visen, N.S., Paliwal, J., Jayas, D.S. and White, N.D.G. 2004. Image analysis of bulk grain samples using neural networks. Canadian Biosystems Engineering/Le génie des biosystèmes au Canada 46: 7.117.15. Algorithms were developed to acquire and process color images of bulk grain samples of five grain types, namely barley, oats, rye, wheat, and durum wheat. The developed algorithms were used to e...

Journal: :CoRR 2013
Claudia Nieuwenhuis Daniel Cremers Simon Hawe Martin Kleinsteuber

We propose an algorithm for segmenting natural images based on texture and color information, which leverages the co-sparse analysis model for image segmentation within a convex multilabel optimization framework. As a key ingredient of this method, we introduce a novel textural similarity measure, which builds upon the co-sparse representation of image patches. We propose a Bayesian approach to...

2016

Thin section polarized-light microscopy is a simple, cost-effective and nondestructive technique utilized to delineate crystalline or amorphous solids at varying scales and spatial resolutions; thereby allowing the different phases to be studied within their textural framework. Estimates of chemical composition and insight into the solid’s genesis can be deduced via unique textural characterist...

2017
Yangyang Fan Tao Wang Zhengjun Qiu Jiyu Peng Chu Zhang Yong He

Striped stem-borer (SSB) infestation is one of the most serious sources of damage to rice growth. A rapid and non-destructive method of early SSB detection is essential for rice-growth protection. In this study, hyperspectral imaging combined with chemometrics was used to detect early SSB infestation in rice and identify the degree of infestation (DI). Visible/near-infrared hyperspectral images...

1999
Uta Jütting Peter Gais Karsten Rodenacker Joachim Böhm Susanne Koch Heinz W. Präuer Heinz Höfler

Neuroendocrine tumours (NET) of the lung are divided in subtypes with different malignant potential. The first is the benign or low-grade malignant tumours, well-differentiated, called typical carcinoids (TC) and the second is the high-grade malignant tumours, poorly differentiated of small (SCLC) or large cell type (LCLC). Between these tumour types lies the well-differentiated carcinoma with ...

G. Karimi H. Heydarzadeh Darzi, M. Farrokhi S. Gilani S. M. M. Nouri

In the present study, textural and structural characterizations of chitosan bead for immobilization of alpha amylase were studied in detail by N2 adsorption–desorption, Microspore Analysis (MP), Barrett–Joyner–Halenda (BJH) plots and Field Emission Scanning Electron Microscope (FESEM) observations. Pore structure observation revealed chemical activation of chitosan bead by glutaralde...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2016
Willem Grootjans Florent Tixier Charlotte S van der Vos Dennis Vriens Catherine C Le Rest Johan Bussink Wim J G Oyen Lioe-Fee de Geus-Oei Dimitris Visvikis Eric P Visser

Accurate measurement of intratumor heterogeneity using parameters of texture on PET images is essential for precise characterization of cancer lesions. In this study, we investigated the influence of respiratory motion and varying noise levels on quantification of textural parameters in patients with lung cancer. METHODS We used an optimal-respiratory-gating algorithm on the list-mode data of...

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