基于不同模型选择聚类技术的分支定界方法对图像数据点的性能分析

C. S. Sasireka, P. Raviraj
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引用次数: 0

摘要

在数据挖掘领域,为了有效地分析数据,近年来研究人员采用了聚类、序列化和特征选择等分支定界方法。传统的聚类搜索是通过不同的划分方案来优化聚类的形成。对于图像数据,由于数据量大、聚类数量的不确定性,分区方法的计算量显得很复杂。最近的研究提出了一个分支定界模型的新版本,称为模型选择问题,它更有效地处理了聚类问题。对于基于模型的聚类问题,为了将数据点分配到合适的聚类中,需要知道聚类参数。只有在集群分配已知的情况下才计算集群参数。基于导航和成本模型、SwiftRule中的分段表示和Analytic模型等大多数匹配模型为聚类分配数据点。如果超越了特定于问题的边界和/或在域区域的数据点中添加的启发式,则内存开销、特定的模型选择和不确定的数据点会导致各种聚类异常。此外,为了在图像数据聚类的某些领域上实现问题特定界的效率,还需要验证聚类的有效性和纯度。对聚类模型模型选择方法的实验评价表明,与导航和成本模型、SwiftRule中的分段表示和Analytic模型相比,聚类模型在准确率、计算复杂度和执行时间上都有提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance analysis of branch-and-bound approach with various model-selection clustering techniques for image data point
In data mining context, for efficient data analysis recent researchers utilized branch-and-bound methods such as clustering, seriation and feature selection. Traditional cluster search was done with different partitioning schemes to optimize the cluster formation. Considering image data, partitioning approaches seems to be computationally complex due to large data size, and uncertainty of number of clusters. Recent work presented a new version of branch and bound model called model selection problem, handles the clustering issues more efficiently. For model-based clustering problems, to assign data point to appropriate cluster, cluster parameters should be known. Cluster parameters are computed only if the cluster assignments are known. Data point is assigned to the cluster based on most matching model such as Navigation and Cost Model, Segment Representation in SwiftRule and Analytic model. If the problem-specific bounds and/or added heuristics in the data points of the domain area get surmounted, memory overheads, specific model selection, and uncertain data points cause various clustering abnormalities. In addition cluster validity and purity needs to be testified for efficiency of problem-specific bound on certain domain areas of image data clustering. Experimental evaluation on the model selection approach of cluster model shows the improvement in accuracy, computational complexity and execution time, when compared to Navigation and Cost Model, Segment Representation in SwiftRule and Analytic model.
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