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Multi-view SAR image target recognition method based on depth neural network

A deep neural network and target recognition technology, applied in neural learning methods, biological neural network models, character and pattern recognition, etc., can solve problems such as not being able to make full use of image correlation

Active Publication Date: 2016-04-20
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

However, the existing multi-view SAR image recognition methods, such as joint sparse representation, decision-level fusion, etc., cannot make full use of the correlation between images to improve the accuracy of recognition

Method used

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  • Multi-view SAR image target recognition method based on depth neural network
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  • Multi-view SAR image target recognition method based on depth neural network

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Experimental program
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Embodiment

[0126] A multi-view SAR image target recognition method based on deep neural network, specifically:

[0127] Step 1. Perform preprocessing such as size cutting and energy normalization on the input training set images and test set images.

[0128] Select three data sets of T72, BMP2, and BTR70 in the MSATR database, among which the training set is T72_132, BMP2_S71, and BTR70_C71 collected at a 17-degree viewing angle, and the test set is T72_132 collected at a 15-degree viewing angle. T72_812, T72_S7, BMP2_9563, BMP2_9566, BMP2_S71, BTR70_C71 these 7 data sets.

[0129] (1) Crop the original training image and the obtained test images of various resolutions, from 128×128 to 64×64.

[0130] (2) The energy normalization method is used to normalize the training set images and test set images. The formula is as follows

[0131] x ^ ( i , j ) = ...

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Abstract

The invention discloses a multi-view SAR image target recognition method based on a depth neural network, and the method comprises three steps: image preprocessing, feature extraction based on CAE, and multi-view SAR image recognition based on RNN. The method specifically comprises the steps: firstly carrying out the cutting and energy normalization of an inputted image; secondly extracting the features of an original image through the non-supervision training of CAE; thirdly constructing a multi-view SAR image feature sequence through the above features; fourthly carrying out the supervised training of the RNN through employing a training feature sequence, wherein the RNN can be used for the recognition of a testing set feature sequence after training. The method can make the most of the capability of CNN in learning and extracting the general features of the image and the capability of RNN in fully extracting the context of the sequence, effectively improves the recognition rate of a multi-view SAR image target, and is higher in engineering value.

Description

technical field [0001] The present invention relates to the field of radar technology, in particular to a multi-view SAR image target recognition method based on a deep neural network. Background technique [0002] As a component of SAR image interpretation system, SAR automatic target recognition has attracted extensive attention of researchers because of its significance in military and civilian fields such as disaster assessment, resource detection, and battlefield reconnaissance. SAR automatic target recognition mainly includes two parts: feature extraction and recognizer construction. For feature extraction, methods such as PCA, KPCA, and KLDA have been successfully used. For the field of target recognition, template matching method, HMM, SVM and other methods have also been tried. However, for feature extraction, the current methods mainly focus on spatial transformation processing of image features, so that different types of features have a better distinction. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06N3/08
CPCG06N3/08G06F18/24323G06F18/241
Inventor 王鹏波李轩李春升门志荣
Owner BEIHANG UNIV
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