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The Ngongotaha river UDPS experiment: low-cost underwater dynamic stereo photogrammetry

Published: 26 November 2012 Publication History

Abstract

We propose to integrate the newest developments in stereomatching theory, affordable parallel processing capabilities (using GPU e.g. PC gaming/graphic card) and statistical surface analysis to implement and test an in-situ Underwater Dynamic Stereo Photogrammetry (UDSP) system for civil engineering applications. The proposed UDPS system aims to provide underwater Digital Elevation Models (DEM), for applications such as a two-dimensional discrete matrix of data underwater elevations. Experiments on river bed stereophotogrammetry in the Ngongotaha Stream near Rotorua using consumer grade stereo cameras including Go-Pro and Fujifilm W3 are used in through-water and underwater calibration and stereo measurements of 32 pebbles on the river bed. Pebbles are measured and identified. Initial results highlight the need for specialised equipment for through-water and underwater photogrammetry experiments to limit blurring effects caused by the water-plastic-air interfaces. Despite poor optical quality of the images obtained, we were able to correlate pebble sizes from calibrated stereo depth maps and actual measurement.

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    IVCNZ '12: Proceedings of the 27th Conference on Image and Vision Computing New Zealand
    November 2012
    547 pages
    ISBN:9781450314732
    DOI:10.1145/2425836
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    • HRS: Hoare Research Software Ltd.
    • Google Inc.
    • Dept. of Information Science, Univ.of Otago: Department of Information Science, University of Otago, Dunedin, New Zealand

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    New York, NY, United States

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    Published: 26 November 2012

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    Author Tags

    1. calibration
    2. stereo-photogrammetry
    3. underwater

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    IVCNZ '12
    Sponsor:
    • HRS
    • Dept. of Information Science, Univ.of Otago
    IVCNZ '12: Image and Vision Computing New Zealand
    November 26 - 28, 2012
    Dunedin, New Zealand

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