Potential of multitemporal Gaofen-1 panchromatic/multispectral images for crop classification: case study in Xinjiang Uygur Autonomous Region, China

	Potential of multitemporal Gaofen-1 panchromatic/multispectral images for crop classification: case study in Xinjiang Uygur Autonomous Region, China
	Hao, Pengyu 1; Wang, Li 1; Niu, Zheng 1
刊名	JOURNAL OF APPLIED REMOTE SENSING
	2015
卷号	9 页码:1669-1676
关键词	random forest object-based image analysis feature importance Jeffries-Matusita distance classification accuracy cotton maize wheat
通讯作者	Wang, L (reprint author), Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, CAS Olymp S&T Pk,20 Datun Rd,POB 9718, Beijing 100101, Peoples R China.
英文摘要	Gaofen-1 panchromatic/multispectral (GF-1 PMS) data have both high spatial and temporal resolutions, and this research aims at evaluating the potential of GF-1 PMS data for crop classification. Three PMS images (at days 110, 192, and 274) were acquired in Manas County of Xinjiang. The images were first segmented and all objects were then visually interpreted based on ground reference data. Some indices and textual features were then extracted at the object level. Subsequently, the Jeffries-Matusita (JM) distance was employed to estimate the class separability among all pair-wise comparisons of each time period. Afterward, a random forest algorithm was used to calculate importance scores of all features and classify crop types for every possible image combination. Additionally, to evaluate the influence of feature number on classification accuracy, features were added one by one based on the importance of scores. The result showed that GF-1 PMS images with high-spatial resolution had the potential to identify the boundary of the crop fields. Relatively high JM distance (above 1.5) and classification accuracy (above 90%) indicated that day 192 image contributed the most to the crop identification in the study area. For multi-image combinations, days 110 to 192 combination can achieve high overall accuracy (around 93%) and more images cannot substantially improve the classification performance. As for features, normalized difference vegetation index and near infrared (NIR) band had the highest importance scores and textual features contributed to distinguishing tree from crop land. Finally, classification accuracy increased together with the augmentation of feature number when only a few features were used. After accuracies reached saturation points, however, more features only slightly improved the classification performance. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
研究领域[WOS]	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000357998300001
内容类型	期刊论文
源URL	[http://ir.ceode.ac.cn/handle/183411/38169]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1.[Hao, Pengyu 2.Wang, Li 3.Niu, Zheng] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China 4.[Hao, Pengyu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hao, Pengyu,Wang, Li,Niu, Zheng. Potential of multitemporal Gaofen-1 panchromatic/multispectral images for crop classification: case study in Xinjiang Uygur Autonomous Region, China[J]. JOURNAL OF APPLIED REMOTE SENSING,2015,9:1669-1676.
APA	Hao, Pengyu,Wang, Li,&Niu, Zheng.(2015).Potential of multitemporal Gaofen-1 panchromatic/multispectral images for crop classification: case study in Xinjiang Uygur Autonomous Region, China.JOURNAL OF APPLIED REMOTE SENSING,9,1669-1676.
MLA	Hao, Pengyu,et al."Potential of multitemporal Gaofen-1 panchromatic/multispectral images for crop classification: case study in Xinjiang Uygur Autonomous Region, China".JOURNAL OF APPLIED REMOTE SENSING 9(2015):1669-1676.