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Polarized SAR image classification method based on sparse depth stack network

A classification method and sparse technology, applied in the field of image processing, can solve the problem of low classification accuracy

Active Publication Date: 2015-12-02
XIDIAN UNIV
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Problems solved by technology

The present invention extracts the depth features of polarimetric SAR images, avoiding the problem of low classification accuracy caused by the use of a single polarimetric scattering feature

Method used

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  • Polarized SAR image classification method based on sparse depth stack network
  • Polarized SAR image classification method based on sparse depth stack network
  • Polarized SAR image classification method based on sparse depth stack network

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0051] Step 1. Input a polarimetric SAR image.

[0052] Input a coherence matrix of a polarization SAR image to be classified, its size is a matrix of 3×3×N, and N represents the number of pixels in the polarization SAR image.

[0053] Step 2. Select training samples and test samples.

[0054] The real and imaginary parts of the six upper triangular elements of the coherence matrix are used as the features of the polarimetric SAR image to form a 9×N sample set.

[0055] 10% of the samples are randomly selected from the sample set as training samples, and the remaining 90% of the samples are used as test samples.

[0056] Step 3. Construct a sparse deep stack network.

[0057] The three single-layer sparse deep networks, the positional relationship of the upper l...

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Abstract

The invention discloses a polarized SAR image classification method based on a sparse depth stack network. The method comprises steps of: (1) inputting a polarized SAR image; (2) selecting a training sample and a testing sample; (3) constructing the sparse depth stack network; (4) training the sparse depth stack network; (5) inputting the testing sample; and (6) acquiring a classification result graph. The method extracts the depth characteristic of the polarized SAR image by using the sparse depth stack network, prevents a problem that the characteristics of a complex target cannot be expressed completely by single polarization scattering characteristic quantity, adds sparse constraint into the sparse depth stack network, and considers local correlation between characteristics. The method has advantages of low time complexity, high classification accuracy, and wide algorithm adaptability, and can be used in the field of radar image terrain classification and object identification.

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to a polarization synthetic aperture radar SAR image classification method based on a sparse deep stack network in the technical field of polarization synthetic aperture radar image classification. The invention can be applied to the object classification and target recognition of radar images. Background technique [0002] Synthetic Aperture Radar (SAR) is a coherent imaging radar operating in the microwave band and an active remote sensing sensor. Polarized SAR belongs to the category of SAR. Compared with traditional SAR, it can greatly improve the ability to obtain various information of targets by controlling and changing the polarization mode of radar transmitting and receiving electromagnetic waves, and provides a basis for more in-depth study of target scattering mechanism. Important reference. The understanding and interpretation of polarimetric SAR images ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/2413G06F18/214
Inventor 侯彪焦李成刘小娟马晶晶张向荣马文萍
Owner XIDIAN UNIV
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