Underwater imaging with a moving acoustic lens

The acoustic lens is a high-resolution, forward-looking sonar for three dimensional (3-D) underwater imaging. We discuss processing the lens data for recreating and visualizing the scene. Acoustical imaging, compared to optical imaging, is sparse and low resolution. To achieve higher resolution, we...

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Bibliographic Details
Published in:IEEE transactions on image processing 1998-01, Vol.7 (1), p.91-99
Main Authors: Kamgar-Parsi, B., Rosenblum, L.J., Belcher, E.O.
Format: Article
Language:English
Subjects:
Acoustic imaging
Applied sciences
Data visualization
Exact sciences and technology
High-resolution imaging
Image processing
Image reconstruction
Image resolution
Information, signal and communications theory
Layout
Lenses
Optical imaging
Signal processing
Sonar
Telecommunications and information theory
Underwater acoustics
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Summary:The acoustic lens is a high-resolution, forward-looking sonar for three dimensional (3-D) underwater imaging. We discuss processing the lens data for recreating and visualizing the scene. Acoustical imaging, compared to optical imaging, is sparse and low resolution. To achieve higher resolution, we obtain a denser sample by mounting the lens on a moving platform and passing over the scene. This introduces the problem of data fusion from multiple overlapping views for scene formation, which we discuss. We also discuss the improvements in object reconstruction by combining data from several passes over an object. We present algorithms for pass registration and show that this process can be done with enough accuracy to improve the image and provide greater detail about the object. The results of in-water experiments show the degree to which size and shape can be obtained under (nearly) ideal conditions.
ISSN:1057-7149
1941-0042
DOI:10.1109/83.650853