Acoustic Camera 3D Imaging

PhD Research: Microphone Array 3D Beamforming and Deconvolution

Project Funding

University of Auckland Doctoral Scholarship

Duration

2007 – 2012

Supervisor

Prof. Stuart Bradley

Description

Research related to the development of image sharpening (deconvolution) of 3D acoustic maps generated using microphone arrays (acoustic cameras), beamforming algorithms, and computer vision techniques. Developed a 72 channel microphone phased array including hardware, data acquisition, software, signal processing algorithms, and computer vision scanning system. First to perform3D deconvolution of beamforming maps generated using the 3D surface of an object scanned using computer vision techniques. This was shown to be more accurate than the traditional 2D method in near-field and at higher frequencies. Also, was the first to develop a complete combined microphone array and camera calibration technique.

Publications

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Microphone phased array 3D beamforming and deconvolution

PhD Thesis, University of Auckland, New Zealand, 2012
Legg, M.
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Automatic 3D scanning surface generation for microphone array acoustic imaging

Applied Acoustics, 76: 230-237, 2014
Legg, M and Bradley, S
Publisher's website BibTeX
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A combined microphone and camera calibration technique with application to acoustic imaging

Image Processing, IEEE Transactions on, 22(10): 4028-4039, 2013
Legg, M and Bradley, S
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Comparison of CLEAN-SC for 2D and 3D scanning surfaces

4th Berlin Beamforming Conference, Berlin. 06 Feb 2012
Legg, M and Bradley, S
Publisher's website BibTeX
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Tracking of migratory birds using 2D microphone arrays

International Symposium on Sustainability in Acoustics (ISSA 2010), 2010
Legg, M. and Wiens, T. and Bradley, S.
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Design of an adaptive microphone phased array for investigating 3D deconvolution

International Symposium on Sustainability in Acoustics (ISSA 2010), 2010
Legg, M. and Bradley, S.
BibTeX