A Spectral-Spatial Change Detection Method Based on Simplified 3-D Convolutional Autoencoder for Multitemporal Hyperspectral Images

Change detection for multitemporal hyperspectral images (HSIs) has always been a research hotspot of remote sensing. However, most current detection methods only use spectral information or spatial information separately, and there are many false detection areas in the detection results. Besides, th...

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Veröffentlicht in:	IEEE geoscience and remote sensing letters Jg. 19; S. 1 - 5
Hauptverfasser:	Zhao, Chunhui, Cheng, Hao, Feng, Shou
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	Piscataway IEEE 2022 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:	3-D convolutional autoencoder (3DCAE) Change detection Classifiers Convolution Data analysis Data mining Data processing Decoding Detection Feature extraction hyperspectral images (HSIs) Hyperspectral imaging Kernel Methods Neural networks Redundancy Remote sensing Spatial data spatial–spectral information Spectra Training
ISSN:	1545-598X, 1558-0571
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Abstract	Change detection for multitemporal hyperspectral images (HSIs) has always been a research hotspot of remote sensing. However, most current detection methods only use spectral information or spatial information separately, and there are many false detection areas in the detection results. Besides, the feature extraction method based on neural networks needs a huge amount of training samples, but collecting labeled training samples for change detection tasks is difficult. Therefore, this letter proposes a hyperspectral change detection method based on a simplified 3-D convolutional autoencoder (S3DCAECD). First, the framework is based on deep unsupervised autoencoder (AE), which can extract deep spectral-spatial features from bitemporal images without the need for prior information. Second, by adding a 3-D convolution kernel and eliminating the pooling layer, the structure of 3-D convolutional AE is simplified, which can reduce spectral redundancy and improve data processing speed. Finally, a softmax classifier with a 2-D convolutional layer added is used to obtain the detection result, and only a few label samples are needed to train the classifier. Three HSIs' experimental results indicate that the accuracy of the S3DCAECD is more than 95% on three experimental datasets and it has better detection results than several commonly used methods.
AbstractList	Change detection for multitemporal hyperspectral images (HSIs) has always been a research hotspot of remote sensing. However, most current detection methods only use spectral information or spatial information separately, and there are many false detection areas in the detection results. Besides, the feature extraction method based on neural networks needs a huge amount of training samples, but collecting labeled training samples for change detection tasks is difficult. Therefore, this letter proposes a hyperspectral change detection method based on a simplified 3-D convolutional autoencoder (S3DCAECD). First, the framework is based on deep unsupervised autoencoder (AE), which can extract deep spectral–spatial features from bitemporal images without the need for prior information. Second, by adding a 3-D convolution kernel and eliminating the pooling layer, the structure of 3-D convolutional AE is simplified, which can reduce spectral redundancy and improve data processing speed. Finally, a softmax classifier with a 2-D convolutional layer added is used to obtain the detection result, and only a few label samples are needed to train the classifier. Three HSIs’ experimental results indicate that the accuracy of the S3DCAECD is more than 95% on three experimental datasets and it has better detection results than several commonly used methods.
Author	Feng, Shou Cheng, Hao Zhao, Chunhui
Author_xml	– sequence: 1 givenname: Chunhui surname: Zhao fullname: Zhao, Chunhui email: zhaochunhui1965@163.com organization: College of Information and Communication Engineering, Harbin Engineering University, Harbin, China – sequence: 2 givenname: Hao surname: Cheng fullname: Cheng, Hao email: chenghaowise@qq.com organization: College of Information and Communication Engineering, Harbin Engineering University, Harbin, China – sequence: 3 givenname: Shou orcidid: 0000-0002-7308-9590 surname: Feng fullname: Feng, Shou email: fengshou@hrbeu.edu.cn organization: College of Information and Communication Engineering, Harbin Engineering University, Harbin, China
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SubjectTerms	3-D convolutional autoencoder (3DCAE) Change detection Classifiers Convolution Data analysis Data mining Data processing Decoding Detection Feature extraction hyperspectral images (HSIs) Hyperspectral imaging Kernel Methods Neural networks Redundancy Remote sensing Spatial data spatial–spectral information Spectra Training
Title	A Spectral-Spatial Change Detection Method Based on Simplified 3-D Convolutional Autoencoder for Multitemporal Hyperspectral Images
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