Object-based Image Analysis and Data mining for Building Ontology of Informal Settlements

被引:3
作者
Khelifa, Djerriri [1 ,2 ]
Mimoun, Malki [2 ]
机构
[1] Ctr Spatial Tech, Div Earth Observat, Arzew 31200, Oran, Algeria
[2] Univ Djillali Liabes Sidi Bel Abbes, BEEDIS Lab, Abbes 22000, Algeria
来源
IMAGE AND SIGNAL PROCESSING FOR REMOTE SENSING XVIII | 2012年 / 8537卷
关键词
Unplanned settlements; VHR imagery; Object-based Image Analysis; Data mining; Ontology;
D O I
10.1117/12.974444
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
During recent decades, unplanned settlements have been appeared around the big cities in most developing countries and as consequence, numerous problems have emerged. Thus the identification of different kinds of settlements is a major concern and challenge for authorities of many countries. Very High Resolution (VHR) Remotely Sensed imagery has proved to be a very promising way to detect different kinds of settlements, especially through the using of new object-based image analysis (OBIA). The most important key is in understanding what characteristics make unplanned settlements differ from planned ones, where most experts characterize unplanned urban areas by small building sizes at high densities, no orderly road arrangement and Lack of green spaces. Knowledge about different kinds of settlements can be captured as a domain ontology that has the potential to organize knowledge in a formal, understandable and sharable way. In this work we focus on extracting knowledge from VHR images and expert's knowledge. We used an object based strategy by segmenting a VHR image taken over urban area into regions of homogenous pixels at adequate scale level and then computing spectral, spatial and textural attributes for each region to create objects. A genetic-based data mining was applied to generate high predictive and comprehensible classification rules based on selected samples from the OBIA result. Optimized intervals of relevant attributes are found, linked with land use types for forming classification rules. The unplanned areas were separated from the planned ones, through analyzing of the line segments detected from the input image. Finally a simple ontology was built based on the previous processing steps. The approach has been tested to VHR images of one of the biggest Algerian cities, that has grown considerably in recent decades.
引用
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页数:13
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