Fish identification method and system based on psychoacoustics parameters

A technology of psychoacoustics and identification methods, which is applied in the processing of detection response signals and material analysis using sonic emission technology. problem, to achieve the effect of reducing feature redundancy, simple equipment, and less redundancy

Active Publication Date: 2013-09-25
INST OF ACOUSTICS CHINESE ACAD OF SCI
View PDF6 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of feature extraction of fish body echo signals in the prior art, resulting in high feature dimension of the acquired echo signals, large redundancy, unsatisfactory classification and recognition effects, etc., thereby providing A fish identification method and system based on psychoacoustic parameters

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fish identification method and system based on psychoacoustics parameters
  • Fish identification method and system based on psychoacoustics parameters
  • Fish identification method and system based on psychoacoustics parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Fish echo signal processing: The sonar system commonly used in fishery resource surveys generally has a relatively high sound wave frequency, which is beyond the audible range of the human ear, so it is not possible to directly extract psychoacoustic parameters from fish echo signals. Here, it is necessary to shift the frequency of the echo signal first, that is, based on the frequency of the fish body echo signal, multiply it by a cosine signal of a certain frequency, and perform low-pass filtering to obtain the echo signal within the audible range . For example: Assuming that the center frequency of the fish body echo signal is 200KHz, and the frequency coverage range is 190KHz-210KHz, the echo signal can be multiplied by the cosine signal with a frequency of 200KHz, and low-pass filtering is performed, and the cut-off frequency of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a fish identification method and system based on psychoacoustics parameters. The method is an identification strategy based on an active acoustics method, and specifically comprises: step 101) transmitting a sound signal to an underwater fish body, and acquiring a backscatter echo signal of the underwater fish body; step 102) carrying out filtering and amplitude normalization pretreatments for the fish body echo signal; step 103) extracting characteristics from the pretreated echo signal, and the specific method is as follows: carrying out frequency shifting for the pretreated echo signal, and shifting the frequency into a human audible frequency range, then dividing the frequency-shifted signal into a plurality of frequency bands according to a human auditory model, calculating specific loudness of various frequency bands, and taking the specific loudness as characteristic quantities; step 104) inputting the characteristic quantities to a classifier, classifying, and finishing species identification of the underwater fish body.

Description

technical field [0001] The invention relates to a fish recognition technology based on an acoustic method, in particular to a fish recognition method and system based on psychoacoustic parameters. Background technique [0002] With the increasing demand of human beings for marine resources, the development of marine fishery resources has been paid more and more attention. Fishery resource investigation and assessment work is an important basis for the rational development of marine fishery resources, which requires the ability to quickly identify fish species. [0003] The traditional fish resource survey method is mainly based on the trawling method. Compared with the traditional trawling identification method, the acoustic method has the advantages of fast and convenient, no damage to biological resources, and sustainable observation. Therefore, in recent years, relevant foreign research institutions have vigorously developed fish identification technology based on acoust...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N29/14G01N29/44
Inventor刘寅许枫张乔温涛纪永强
OwnerINST OF ACOUSTICS CHINESE ACAD OF SCI