Exponentially sampling scale parameters for the efficient segmentation of remote-sensing images

doi:10.1080/01431161.2017.1410297

	Exponentially sampling scale parameters for the efficient segmentation of remote-sensing images
	Wang, Zhihua 1,2; Lu, Chen 1,2; Yang, Xiaomei 1,3
刊名	INTERNATIONAL JOURNAL OF REMOTE SENSING
	2018
卷号	39 期号:6 页码:1628-1654
ISSN号	0143-1161
DOI	10.1080/01431161.2017.1410297
通讯作者	Yang, Xiaomei(yangxm@lreis.ac.cn)
英文摘要	Scale parameter(s) of multi-scale hierarchical segmentation (MSHS), which groups pixels as objects in different size and hierarchically organizes them in multiple levels, such as the multiresolution segmentation (MRS) embedded into the eCognition software, directly determines the average size of segmented objects and has significant influences on following geographic object-based image analysis. Recently, some studies have provided solutions to search the optimal scale parameter(s) by supervised strategies (with reference data) or unsupervised strategies (without reference data). They focused on designing metrics indicating better scale parameter(s) but neglected the influences of the linear sampling method of the scale parameter they used as default. Indeed, the linear sampling method not only requires a proper increment and a proper range to balance the accuracy and the efficiency by supervised strategies, but also performs badly in the selection of multiple key scales for the MSHS of complex landscapes by unsupervised strategies. Against these drawbacks, we propose an exponential sampling method. It was based on our finding that the logarithm of the segment count and the logarithm of the scale parameter are linearly dependent, which had been extensively validated on different landscapes in this study. The scale parameters sampled by the exponential sampling method and the linear sampling method with increments 2, 5, 10, 25, and 100 that most former studies used were evaluated and compared by two supervised strategies and an unsupervised strategy. Results indicated that, when searching by the supervised strategies, the exponential sampling method achieved both high accuracy and efficiency where the linear sampling method had to balance them through the experiences of an expert; and when searching by the unsupervised strategy, multiple key scale parameters in MSHS of complex landscapes could be identified among the exponential sampling results, while the linear sampling results hardly achieved this. Considering these two merits, we recommend the exponential sampling method to replace the linear sampling method when searching the optimal scale parameter(s) of MRS.
资助项目	National Key Research and Development Program of China[2016YFB0501404] ; National Science Foundation of China[41671436] ; National Science Foundation of China[41421001] ; Science and Technology Project of Jiangxi Province[2015ACF60025] ; Innovation Project of LREIS[O88RAA01YA]
WOS关键词	ACCURACY ASSESSMENT MEASURES ; MULTISCALE SEGMENTATION ; DISCREPANCY MEASURE ; SENSED IMAGERY ; CLASSIFICATION ; SELECTION ; OBJECTS ; MULTIRESOLUTION ; GEOBIA ; OPTIMIZATION
WOS研究方向	Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000423204500002
资助机构	National Key Research and Development Program of China ; National Science Foundation of China ; Science and Technology Project of Jiangxi Province ; Innovation Project of LREIS
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/56870]
专题	中国科学院地理科学与资源研究所
通讯作者	Yang, Xiaomei
作者单位	1.Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhihua,Lu, Chen,Yang, Xiaomei. Exponentially sampling scale parameters for the efficient segmentation of remote-sensing images[J]. INTERNATIONAL JOURNAL OF REMOTE SENSING,2018,39(6):1628-1654.
APA	Wang, Zhihua,Lu, Chen,&Yang, Xiaomei.(2018).Exponentially sampling scale parameters for the efficient segmentation of remote-sensing images.INTERNATIONAL JOURNAL OF REMOTE SENSING,39(6),1628-1654.
MLA	Wang, Zhihua,et al."Exponentially sampling scale parameters for the efficient segmentation of remote-sensing images".INTERNATIONAL JOURNAL OF REMOTE SENSING 39.6(2018):1628-1654.