Special Section on Management and Analytics of Remotely Sensed Big Data

Hyperspectral image classification for mapping agricultural tillage practices

[+] Author Affiliations
Qiong Ran, Wei Li

Beijing University of Chemical Technology, College of Information Science and Technology, Beijing 100029, China

Qian Du

Mississippi State University, Department of Electrical and Computer Engineering, Starkville, Mississippi 39762, United States

Chenghai Yang

USDA Southern Plains Agricultural Research Center, College Station, Texas 77845, United States

J. Appl. Remote Sens. 9(1), 097298 (Mar 06, 2015). doi:10.1117/1.JRS.9.097298
History: Received November 26, 2014; Accepted January 30, 2015
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Abstract.  An efficient classification framework for mapping agricultural tillage practice using hyperspectral remote sensing imagery is proposed, which has the potential to be implemented practically to provide rapid, accurate, and objective surveying data for precision agricultural management and appraisal from large-scale remote sensing images. It includes a local region filter [i.e., Gaussian low-pass filter (GLF)] to extract spatial-spectral features, a dimensionality reduction process [i.e., local fisher’s discriminate analysis (LFDA)], and the traditional k-nearest neighbor (KNN) classifier, and is denoted as GLF-LFDA-KNN. Compared to our previously used local average filter and adaptive weighted filter, the GLF also considers spatial features in a small neighborhood, but it emphasizes the central pixel itself and is data-independent; therefore, it can achieve the balance between classification accuracy and computational complexity. The KNN classifier has a lower computational complexity compared to the traditional support vector machine (SVM). After classification separability is enhanced by the GLF and LFDA, the less powerful KNN can outperform SVM and the overall computational cost remains lower. The proposed framework can also outperform the SVM with composite kernel (SVM-CK) that uses spatial-spectral features.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Qiong Ran ; Wei Li ; Qian Du and Chenghai Yang
"Hyperspectral image classification for mapping agricultural tillage practices", J. Appl. Remote Sens. 9(1), 097298 (Mar 06, 2015). ; http://dx.doi.org/10.1117/1.JRS.9.097298


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