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The Study of Acoustical Lens Beam-forming and Acoustical Image Processing

Author: LiuDongYu
Tutor: SangEnFang；YueYing
School: Harbin Engineering University
Course: Electronics and Communication Engineering
Keywords: Imaging sonar Acoustic lens Underwater acoustic image processing Image Segmentation
CLC: TP391.41
Type: Master's thesis
Year: 2009
Downloads: 195
Quote: 2
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Abstract


High-resolution imaging sonar is widely used in marine environmental monitoring and resource development . Papers on the two key technologies for high-resolution imaging sonar : beamforming technology and underwater acoustic image processing technology . The thesis studies the acoustic lens can be used for high - resolution acoustic imaging beamforming technology . The hybrid model to calculate the the lens sound field simulation calculation and analysis the lens geometry parameters , material parameters and the ambient temperature beamforming performance impact of the law ; through the test to verify the correctness of the simulation model . Secondly , the paper studies targeting methods based on the image of the sequence of sound underwater . Combined image features focus on the image pre-processing method and subsequent noise reduction methods , accumulation after pretreatment , image , and subsequent noise reduction trajectory synthesis targeting . Finally, study the technology of underwater acoustic image segmentation . Applicable approach for two different types of sound image - forward looking sonar image and side scan sonar images , respectively . Side-scan sonar target bright and shadow segmentation method .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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