نتایج جستجو برای: spatial clustering

تعداد نتایج: 457055  

Journal: :Sustainability 2021

Previous studies have shown that when a crime occurs, the risk of in adjacent areas increases. To reflect this, previous grid-based prediction combined all cells surrounding event location to be predicted for use model training. However, actual land is continuous rather than set independent as geographic information system. Because patterns occur according detailed method vary, it necessary spa...

Image segmentation is a fundamental step in many of image processing applications. In most cases the image’s pixels are clustered only based on the pixels’ intensity or color information and neither spatial nor neighborhood information of pixels is used in the clustering process. Considering the importance of including spatial information of pixels which improves the quality of image segmentati...

Journal: :ISPRS Int. J. Geo-Information 2017
Qingming Zhan Shuguang Deng Zhihua Zheng

An adaptive spatial clustering (ASC) algorithm is proposed in this present study, which employs sweep-circle techniques and a dynamic threshold setting based on the Gestalt theory to detect spatial clusters. The proposed algorithm can automatically discover clusters in one pass, rather than through the modification of the initial model (for example, a minimal spanning tree, Delaunay triangulati...

2006
Chun-Yu Ho Dan Li

We employ Quah’s [13] transitional matrix and Rey’s [16] Spatial Clustering Index (SCI) to analyze the dynamics in Chinese city income distribution both from temporal and spatial dimensions. Our empirical results show that cities in eastern China enjoy more favorable movements in income distribution during urban post-reform era compared with her western and central counterparts; the dynamic spa...

Journal: :EURASIP Journal on Image and Video Processing 2018

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