Mosaicing of acoustic camera images
- 1 January 2005
- journal article
- Published by Institution of Engineering and Technology (IET) in IEE Proceedings - Radar, Sonar and Navigation
- Vol. 152 (4), 263-270
- https://doi.org/10.1049/ip-rsn:20045015
Abstract
An algorithm for image registration and mosaicing on underwater sonar image sequences characterised by a high noise level, inhomogeneous illumination and low frame rate is presented. Imaging geometry of acoustic cameras is significantly different from that of pinhole cameras. For a planar surface viewed through a pinhole camera undergoing translational and rotational motion, registration can be obtained via a projective transformation. For an acoustic camera, it is shown that, under the same conditions, an affine transformation is a good approximation. A novel image fusion method, which maximises the signal-to-noise ratio of the mosaic image is proposed. The full procedure includes illumination correction, feature based transformation estimation, and image fusion for mosaicing.Keywords
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