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Hyperspectral image classification method based on full convolution space propagation network

A technology of hyperspectral image and spatial propagation, which is applied in the field of hyperspectral image classification of full convolutional spatial propagation network, and can solve the problem of shallow deep learning model

Active Publication Date: 2020-03-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, limited by the number of hyperspectral image training samples, the deep learning model applied in hyperspectral image classification is relatively shallow, although a large number of experiments in computer vision have shown that effectively increasing the depth is very beneficial to improve classification performance

Method used

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  • Hyperspectral image classification method based on full convolution space propagation network
  • Hyperspectral image classification method based on full convolution space propagation network
  • Hyperspectral image classification method based on full convolution space propagation network

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Embodiment

[0040] Step 1: Data preprocessing; first, data expansion is performed on the hyperspectral image data to be processed, and the up and down, left and right, 90°, 180° and 270° rotation transformations are performed respectively, and six hyperspectral images can be obtained from the original hyperspectral image. spectral image. Then, the maximum and minimum normalization is performed on the obtained hyperspectral image, and the normalization formula is shown in formula (1). The normalized hyperspectral image is segmented according to a certain step size, generally 20.

[0041]

[0042] Step 2: Data division; count the total number of labeled samples from the preprocessed hyperspectral images, and then select 5% of the labeled samples as training data.

[0043] Step 3: build network model; The network of the present invention design has comprised two parts structure successively:

[0044] 1) Feature extraction part; the input data first passes through an asymmetric three-dim...

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Abstract

The invention relates to a hyperspectral image classification method based on a full convolution space propagation network, aiming to solve the hyperspectral image classification problem and applyingthe full convolution space propagation network to hyperspectral image classification for the first time in combination with a deep learning related technology. A traditional hyperspectral image classification method based on a convolutional neural network performs pixel-by-pixel classification on images, a large number of repetitive operations exist, and the size of the input images has a great influence on a classification result. The full convolution space propagation network can receive input images of any size while reducing repetitive operation, and space information of the hyperspectralimages is fully utilized, so that high-precision classification of the hyperspectral images under a certain condition is achieved.

Description

technical field [0001] The invention relates to a hyperspectral image classification method of a full convolution space propagation network, which belongs to the field of remote sensing image processing. Background technique [0002] Hyperspectral images contain both spectral information and spatial information, and have important applications in military and civilian fields. However, the high-dimensional characteristics of hyperspectral images, high correlation between bands, and spectral mixing make hyperspectral image classification face great challenges. In recent years, with the emergence of new technologies of deep learning, the hyperspectral image classification method based on deep learning has made a breakthrough. However, deep learning models usually contain a large number of parameters and require a large number of training samples. However, there are relatively few annotated samples of hyperspectral images, and it is difficult to fully satisfy the training of d...

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Application Information

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IPC IPC(8): G06K9/62G06N3/04G06N3/08
CPCG06N3/08G06N3/045G06F18/24Y02A40/10
Inventor 李映姜晔楠邹姗蓉张号逵
Owner NORTHWESTERN POLYTECHNICAL UNIV