Fish identification method with multi-feature and multidirectional data fused

A technology of data fusion and identification methods, applied in the re-radiation of sound waves, the use of re-radiation, measurement devices, etc.

Inactive Publication Date: 2015-06-17
HARBIN ENG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of high-precision fish recognition bas

Method used

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  • Fish identification method with multi-feature and multidirectional data fused
  • Fish identification method with multi-feature and multidirectional data fused
  • Fish identification method with multi-feature and multidirectional data fused

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Experimental program
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Embodiment Construction

[0053] Below in conjunction with accompanying drawing and implementation the present invention will be further introduced:

[0054] Step (01) Utilize a single-beam transmitting transducer to transmit acoustic signals to the fish, use M hydrophones to receive fish scattered acoustic signals in M ​​different directions, and obtain multi-directional fish scattered data at the same time, M=6~ 9.

[0055] Step (02) performing normalization, filtering and other processing on the obtained multi-directional sound scattering signal;

[0056] Step (03) extracting the wavelet packet coefficient singular value and time-domain centroid features, and performing feature fusion, the specific method is:

[0057]Step (03) obtains the singular value of the wavelet packet coefficient by formula (1):

[0058] SD m , n = λ m , ...

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Abstract

The invention relates to the field of acoustic fish identification, in particular to a fish identification method with multi-feature and multidirectional data fused. The method comprises the steps that acoustical signals are emitted to the underwater, and fish body multidirectional acoustic scattering signals are acquired; the acquired multidirectional acoustic scattering signals are normalized and filtered; the preprocessed signals are subjected to multi-feature extraction; the preprocessed multidirectional acoustic scattering data are subjected to orthogonal transformation, envelopes are extracted, the wavelet packet coefficient singular value features, the time domain mass center features and the frequency domain mass center features of envelope information are extracted, and feature fusion and dimension reduction processing are conducted. The multidirectional data acquiring method is simple and easy to implement. Based on the extracted multiple features, the multidirectional acoustical scattering features are subjected to collaboration fusion, the fusion degree is high, fusion is compact, and the problems that identification is not clear, and correct identification even cannot be achieved when only single-dimension acoustical scattering information is classified can be effectively solved.

Description

technical field [0001] The invention relates to the field of acoustic fish identification, in particular to a multi-feature and multi-directional data fusion fish identification method. Background technique [0002] The invention patent in the actual examination "a fish identification method and system based on wavelet packet multi-scale information entropy, publication number: 103308919A" introduces a fish identification method, which is characterized by a single feature based on a single orientation data However, fish is a complex sound scatterer. The orientation, size and shape of the fish body and swim bladder seriously affect the sound scattering characteristics of the fish, which makes the sound scattering signal of the fish very complicated. From the complex signal Extracting features that can reflect the intrinsic acoustic scattering characteristics of fish is particularly important in fish identification. The scattering characteristics of fish in different acoustic...

Claims

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Application Information

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IPC IPC(8): G01S15/96G01S7/539
CPCG01S15/96G01S7/539
Inventor 杜伟东李海森李若马丞浩
Owner HARBIN ENG UNIV
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