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A Ship Type Recognition Method Based on Compactness Measure Weighting

A technology of type recognition and compactness, applied to the recognition of patterns in signals, character and pattern recognition, instruments, etc.

Inactive Publication Date: 2019-01-11
HANGZHOU DIANZI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of roughly classifying two types of ships, one-dimensional distance images of military ships and civilian ships, and propose a ship type recognition method based on compactness measure weighting

Method used

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  • A Ship Type Recognition Method Based on Compactness Measure Weighting
  • A Ship Type Recognition Method Based on Compactness Measure Weighting
  • A Ship Type Recognition Method Based on Compactness Measure Weighting

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Embodiment Construction

[0074] In the experiment, a set of measured data of radar one-dimensional range images under different targets and different attitude angles, HRRP of 5 civilian ship targets at different attitude angles, and HRRP of 5 military ship targets at different attitude angles were used. The traditional classification method only classifies and recognizes these 10 targets according to HRRP, and the result of discrimination is these 10 targets. However, in practical applications, the types of military ships and civilian ships are far more than these 10 types, so the traditional classification method has great limitations. Therefore, this experiment only recognizes two types of targets, military ships and civilian ships. However, due to the large differences in the shape, size and structure of different target individuals of the same type, this will lead to HRRP data of similar military ships or civilian ships. There are great differences in HRRP among different individuals in different ...

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Abstract

The invention discloses a ship type identification method based on compactness measure weighting. Traditionally, when performing target recognition based on one-dimensional range images, most of them only extract the features of one-dimensional range images, and do not directly weight the features according to the compactness measure of the features. Firstly, noise reduction and normalization are performed on the original HRRP data to solve the sensitivity problem of HRRP to the amplitude; the target area is extracted by estimating the starting point and ending point of the ship, and the HRRP data is preprocessed to solve the HRRP translation problem; By extracting attitude-invariant features, the HRRP attitude sensitivity problem is also solved to a certain extent. Since the compactness measures of the extracted features are different, the present invention multiplies the extracted features by the compactness of each feature of the sample according to the compactness measure of the sample features to reflect the weight of different features in the classification and recognition process different, and then use the nearest neighbor method to classify and identify the test samples.

Description

technical field [0001] The invention belongs to the field of radar one-dimensional range image target recognition, relates to a ship type identification method based on compactness measure weighting, and is suitable for the application technology research of ship target recognition based on radar one-dimensional range image. Background technique [0002] When the radar radial distance resolution is much smaller than the target size, the target echo occupies multiple range image units in the range direction, and the amplitude of each range unit on the one-dimensional range image (HRRP) is equal to all scattering from the range unit The coherent summation of the center echoes, while the scattering center reflects the target's size, geometry, material structure and other information. Therefore, the radar high-resolution one-dimensional range image can reflect the fine structure information of the target. Radar one-dimensional range image target recognition technology is mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06F2218/10G06F2218/04G06F2218/08G06F2218/12G06F18/21
Inventor 郭宝峰刘巧圆王刚孙同晶杨振赵鑫马腾
Owner HANGZHOU DIANZI UNIV
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