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Target characteristic extraction method, identification method, extraction device and identification system for synthetic aperture sonar image

A technology of synthetic aperture sonar and target features, which is applied in the field of identification systems and can solve the problems of shadow information without considering the target, unfavorable synthetic aperture sonar image detection and identification, etc.

Inactive Publication Date: 2014-02-12
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, the traditional method is not conducive to the detection and recognition of synthetic aperture sonar images because it does not consider the shadow information of the target

Method used

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  • Target characteristic extraction method, identification method, extraction device and identification system for synthetic aperture sonar image
  • Target characteristic extraction method, identification method, extraction device and identification system for synthetic aperture sonar image
  • Target characteristic extraction method, identification method, extraction device and identification system for synthetic aperture sonar image

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Embodiment Construction

[0056] The present invention will be described in detail below in conjunction with specific drawings and embodiments.

[0057] figure 1 Shown are the steps of image processing in the existing underwater imaging sonar recognition system, including: image preprocessing, image segmentation, feature extraction, classification and judgment. The embodiment provided by the present invention improves the feature extraction step.

[0058] In the embodiment of the present invention, object A is used to represent a buried object, object B is used to represent a cylindrical object, and object C is used to represent a natural object. figure 2 (a) is a synthetic aperture sonar image of a buried object; figure 2 (b) is the image after segmenting the synthetic aperture sonar image of the buried object by Markov random field; figure 2 (c) for figure 2 The buried objects in (a) target the same figure 2 (b) The fitting diagram of the edge of the segmentation result; image 3 (a) is a ...

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Abstract

The invention discloses a target characteristic extraction method, identification method, extraction device and identification system for a synthetic aperture sonar image. The target characteristic extraction method includes the steps of extracting shadow geometrical characteristics which include the target shadow zone area, the perimeter zone contour length, the eccentricity ratio, shape parameters, direction values and the ratio of the largest width of a target to the largest width of a shadow, obtaining a characteristic space formed by the shadow geometrical characteristics, extracting the target normalization central moment, obtaining a characteristic space formed by the target normalization central moment, extracting statistical property parameter difference characteristics of a background, the target and the shadow, obtaining shape parameters and dimension parameters, then obtaining a characteristic space formed based on the statistical property parameter difference characteristics of the background, the target and the shadow, and forming a new characteristic space formed by the three characteristic spaces. According to the target characteristic extraction method and identification method for the synthetic aperture sonar image, an underwater object can be effectively represented, and detection and identification of the synthetic aperture sonar image are facilitated.

Description

technical field [0001] The present invention relates to the field of synthetic aperture sonar (Synthetic Aperture Sonar, referred to as SAS) image detection and recognition, in particular, the present invention relates to a synthetic aperture sonar image target feature extraction method and recognition method, extraction device and recognition system. Background technique [0002] Synthetic aperture sonar is a high-resolution underwater imaging sonar that can obtain high-quality underwater images. Synthetic aperture technology uses multiple echoes to coherently superimpose to obtain an aperture, so that images with high precision in azimuth and range can be obtained. In recent years, the automatic detection and classification of synthetic aperture sonar images has important research value. The processing steps of the underwater imaging sonar recognition system (that is, the synthetic aperture sonar image target recognition system) include: image preprocessing, image segment...

Claims

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Application Information

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IPC IPC(8): G06K9/46
Inventor 丁雪洁解恺刘维刘纪元
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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