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author:

Zhou, Ya'nan (Zhou, Ya'nan.) [1] | Luo, Jiancheng (Luo, Jiancheng.) [2] | Feng, Li (Feng, Li.) [3] | Zhou, Xiaocheng (Zhou, Xiaocheng.) [4] (Scholars:周小成)

Indexed by:

SCIE

Abstract:

Spatial features retrieved from satellite data play an important role for improving crop classification. In this study, we proposed a deep-learning-based time-series analysis method to extract and organize spatial features to improve parcel-based crop classification using high-resolution optical images and multi-temporal synthetic aperture radar (SAR) data. Central to this method is the use of multiple deep convolutional networks (DCNs) to extract spatial features and to use the long short-term memory (LSTM) network to organize spatial features. First, a precise farmland parcel map was delineated from optical images. Second, hundreds of spatial features were retrieved using multiple DCNs from preprocessed SAR images and overlaid onto the parcel map to construct multivariate time-series of crop growth for parcels. Third, LSTM-based network structures for organizing these time-series features were constructed to produce a final parcel-based classification map. The method was applied to a dataset of high-resolution ZY-3 optical images and multi-temporal Sentinel-1A SAR data to classify crop types in the Hunan Province of China. The classification results, showing an improvement of greater than 5.0% in overall accuracy relative to methods without spatial features, demonstrated the effectiveness of the proposed method in extracting and organizing spatial features for improving parcel-based crop classification.

Keyword:

crop classification deep learning Sentienl-1 SAR spatial texture feature time-series analysis

Community:

  • [ 1 ] [Zhou, Ya'nan]Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Jiangsu, Peoples R China
  • [ 2 ] [Feng, Li]Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Jiangsu, Peoples R China
  • [ 3 ] [Luo, Jiancheng]Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China
  • [ 4 ] [Luo, Jiancheng]Univ Chinese Acad Sci, Beijing 100049, Peoples R China
  • [ 5 ] [Zhou, Xiaocheng]Fuzhou Univ, Minist Educ, Key Lab Spatial Data Min & Informat Sharing, Fuzhou 350116, Fujian, Peoples R China

Reprint 's Address:

  • [Zhou, Ya'nan]Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Jiangsu, Peoples R China

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Source :

REMOTE SENSING

ISSN: 2072-4292

Year: 2019

Issue: 13

Volume: 11

4 . 5 0 9

JCR@2019

4 . 2 0 0

JCR@2023

ESI Discipline: GEOSCIENCES;

ESI HC Threshold:137

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 26

SCOPUS Cited Count: 33

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

Online/Total:20/10071165
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