نتایج جستجو برای: occurrence matrix

تعداد نتایج: 513075  

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده فنی 1390

شناسایی حروف نوشتاری و نوری نقش مهمی در کاربردهای جدیدی مثل پزشکی و حمل و نقل و سیستم های امنیتی دارد. تاکنون سیستم های شناسایی حروف مختلفی ارائه شده است که هرکدام در یک زمینه کاربردی بکار می روند.در این پایان نامه یک روش جدی برای شناسایی حروف انگلیسی بر مبنای ماتریس gray level co-occurrence matrix (glcm) ارائه شده است.ماتریس glcm بطور وسیعی در کاربرد دسته بندی بافت استفاده می شود. بعد از یک سر...

2004
Don U.A. Galagedera Elizabeth A. Maharaj

This paper investigates association between portfolio returns and higher-order systematic co-moments at different timescales obtained through wavelet multiscalinga technique that decomposes a given return series into different timescales enabling investigation at different return intervals. For some portfolios, the relative risk positions indicated by systematic co-moments at higher timescales ...

2002
Alexander Kadyrov A. Talepbour Maria Petrou

The Trace transform is a generalisation of the Radon transform that allows one to construct image features that do not necessarily have meaning in terms of human perception, but they measure different image characteristics. The ability of producing thousands of features from an image allows one to be selective as to which are appropriate for a particular task. In this paper we propose the use o...

Journal: :Int. J. Computational Intelligence Systems 2009
Ashfaqur Rahman M. Manzur Murshed

Feature weighing methods are commonly used to find the relative significance among a set of features that are effectively used by the retrieval methods to search image sequences efficiently from large databases. As evidenced in the current literature, dynamic textures (image sequences with regular motion patterns) can be effectively modelled by a set of spatial and temporal motion distribution ...

1999
Sug-Bong Choe Hyuk-Jae Jang Sung-Chul Shin

The spin reversal of nanostructured Co/Pd multilayers by varying the number of repeats has been investigated quantitatively. The magnetization viscosity measurement and the direct observation of the time-dependent spin reversal patterns showed that their reversal behavior gradually changed from wall-motion dominant to nucleation dominant by increasing the number of repeats. Both the wall-motion...

1996
Phongsuphap Sukanya Ryo Takamatsu Makoto Sato

In this paper, we present a structural and statistical approach for texture classification. It can achieve with a higher accuracy rate comparing to the Spatial Gray Level Dependence (SGLD) method and Laws' method. Our method uses the previously proposed operator, the Surface-Shape operator (SS-operator), for describing topographic structure of texture images. The SS-operator describes shape of ...

Journal: :journal of ai and data mining 2013
hanieh mohamadi asadollah shahbahrami javad akbari

image retrieval is an important research field which has received great attention in the last decades. in this paper, we present an approach for the image retrieval based on the combination of text-based and content-based features. for text-based features, keywords and for content-based features, color and texture features have been used. query in this system contains some keywords and an input...

2003
Xavier Lladó Arnau Oliver Maria Petrou Jordi Freixenet Joan Martí

In this paper we investigate the effect of the illuminant tilt rotation over surface textures by analysing a set of image texture features extracted from the co-occurrence matrix. From the behaviour of each texture feature, a simple method able to predict the illuminant tilt angle of test images is developed. Moreover, the method is also used to perform a texture classification invariant to the...

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