نتایج جستجو برای: cmeans

تعداد نتایج: 155  

با پیشرفت روز افزون تکنولوژی­های جمع آوری اطلاعات و امکان دسترسی به حجم عظیمی از داده همواره نیازمند روش­هایی برای تجزیه و تحلیل این حجم داده خام و استخراج اطلاعات مفید از آن می­باشیم.  امروزه خوشه­بندی داده به عنوان یکی از روش­های آنالیز و ساده سازی مجموعه داده­های بزرگ، مورد توجه بسیاری از محققین قرار گرفته است. در این میان خوشه­بندی سری­های زمانی با دقت مورد قبول، حائز اهمیت بسیاری می­باشد....

2016
Behzad Radmehr Reza Ghaemi

In this paper , The intelligent hybrid methods are used for improving the performance of K-means and Cmeans algorithms. . To achieve this, these methods are explained in order to improve the performance of these two data mining algorithms. Some suggestions are provided for this aim. The methods used for explaining in relation to C-means algorithms are fuzzy C-means algorithm, combination of fuz...

2006
Dana Elena Ilea Paul F. Whelan Ovidiu Ghita

This paper details the implementation of three traditional clustering techniques (K-Means clustering, Fuzzy CMeans clustering and Adaptive K-Means clustering) that are applied to extract the colour information that is used in the image segmentation process. The aim of this paper is to evaluate the performance of the analysed colour clustering techniques for the extraction of optimal features fr...

2011
Lisa Serir Emmanuel Ramasso Noureddine Zerhouni

A new online clustering method, called E2GK (Evidential Evolving Gustafson-Kessel) is introduced in the theoretical framework of belief functions. The algorithm enables an online partitioning of data streams based on two existing and efficient algorithms: Evidantial cMeans (ECM) and Evolving Gustafson-Kessel (EGK). E2GK uses the concept of credal partition of ECM and adapts EGK, offering a bett...

2004
Ricardo Linden

Clustering is an important technique for data mining which allows us to discover unknown relationships in our data sets. Clustering algorithms that use metrics based on the natural ordering of numbers cannot be applied to categorical (non-numerical) data. In this tutorial we will review the main methods for numerical data clustering (K-Means, Hierarchical Clustering and Fuzzy CMeans) and then s...

2004
Francisco Azuaje

Data clustering is a process of putting similar data into groups. A clustering algorithm partitions a data set into several groups such that the similarity within a group is larger than among groups. This paper reviews four of the most representative off-line clustering techniques: K-means clustering, Fuzzy Cmeans clustering, Mountain clustering, and Subtractive clustering. The techniques are i...

2006
Li Bai Yihui Liu Dorothee Auer Paul S. Morgan

In this paper we present an automatic algorithm for segmenting the putamen from brain MRI based on wavelets and neural network. We first locate the position of putamen using wavelet features. The fuzzy cmeans algorithm is then combined with edge detection to segment the grey matter pixels belonging to the putamen in the located region. Moment features are extracted from the segmented objects fo...

2013
Ming Hao Hua Zhang Wenzhong Shi Kazhong Deng

Unsupervised change detection using fuzzy cmeans and MRF from remotely sensed images Ming Hao, Hua Zhang, Wenzhong Shi & Kazhong Deng To cite this article: Ming Hao, Hua Zhang, Wenzhong Shi & Kazhong Deng (2013) Unsupervised change detection using fuzzy c-means and MRF from remotely sensed images, Remote Sensing Letters, 4:12, 1185-1194, DOI: 10.1080/2150704X.2013.858841 To link to this article...

2012
Hu Ding Jinhui Xu

In this paper, we study a new type of clustering problem, called Chromatic Clustering, in high dimensional space. Chromatic clustering seeks to partition a set of colored points into groups (or clusters) so that no group contains points with the same color and a certain objective function is optimized. In this paper, we consider two variants of the problem, chromatic k-means clustering (denoted...

2001
Shaomin Mu Shengfeng Tian Chuanhuan Yin

The selection of centers and widths has a strong influence on the performance of radial basis function neural network classifier. In this paper, a novel approach of clustering based on Fuzzy Cmeans clustering is proposed, which is called cooperative clustering, and use it for selection of centers of radial basis function neural network. Experimental results show that the performance of classifi...

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