Long-term Monitoring of Displacements by Digital Image Analysis

Andreas Anjan Buyer, Wulf Schubert

Research output: Contribution to conferencePosterResearch

Abstract

It is often very difficult to perform a long-term monitoring programme to measure displacements of structures in remote areas like high rock buttes in alpine regions, where the direct installation of measurement devices and a constant reading is, due to low accessibility, not possible or too expensive. In most cases, tape extensometers or distance measurement instruments have to be installed directly on the moving rock part and a continuous reading is necessary, unless an electronic device records the measurements. The analysis of digital images to calculate the relative position of reference targets, as a form of remote sensing, seems to be an adequate alternative.
This paper investigates the applicability of digital image analysis to perform long-term monitoring programmes with digital cameras. Therefore, the movement of a mobile reference target in relation to a stationary target will be detected on scaled digital images and back-calculated with MATLAB. The thesis shall be tested in field work previously with simplified conditions to detect the limitations of and requirements on the system as well as the accuracy and the influencing factors, like the atmosphere or a dynamic camera position. Afterwards, the method shall be applied on an actual example of a potentially instable rock tower close to Nötsch (Carinthia) to detect displacements along the shear bands and the total movement of the whole rock tower. Advantage of this technique would be the one-time installation of the reference targets in accessible areas and the constant reading of the displacements by remote sensing.
Original languageEnglish
Publication statusPublished - 2016
EventGeoTirol 2016 - Annual Meeting DGGV - Innsbruch, Austria
Duration: 24 Sep 201627 Sep 2016

Conference

ConferenceGeoTirol 2016 - Annual Meeting DGGV
CountryAustria
CityInnsbruch
Period24/09/1627/09/16

Keywords

    Cite this

    Buyer, A. A., & Schubert, W. (2016). Long-term Monitoring of Displacements by Digital Image Analysis. Poster session presented at GeoTirol 2016 - Annual Meeting DGGV, Innsbruch, Austria.

    Long-term Monitoring of Displacements by Digital Image Analysis. / Buyer, Andreas Anjan; Schubert, Wulf.

    2016. Poster session presented at GeoTirol 2016 - Annual Meeting DGGV, Innsbruch, Austria.

    Research output: Contribution to conferencePosterResearch

    Buyer, AA & Schubert, W 2016, 'Long-term Monitoring of Displacements by Digital Image Analysis' GeoTirol 2016 - Annual Meeting DGGV, Innsbruch, Austria, 24/09/16 - 27/09/16, .
    Buyer AA, Schubert W. Long-term Monitoring of Displacements by Digital Image Analysis. 2016. Poster session presented at GeoTirol 2016 - Annual Meeting DGGV, Innsbruch, Austria.
    Buyer, Andreas Anjan ; Schubert, Wulf. / Long-term Monitoring of Displacements by Digital Image Analysis. Poster session presented at GeoTirol 2016 - Annual Meeting DGGV, Innsbruch, Austria.
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    abstract = "It is often very difficult to perform a long-term monitoring programme to measure displacements of structures in remote areas like high rock buttes in alpine regions, where the direct installation of measurement devices and a constant reading is, due to low accessibility, not possible or too expensive. In most cases, tape extensometers or distance measurement instruments have to be installed directly on the moving rock part and a continuous reading is necessary, unless an electronic device records the measurements. The analysis of digital images to calculate the relative position of reference targets, as a form of remote sensing, seems to be an adequate alternative.This paper investigates the applicability of digital image analysis to perform long-term monitoring programmes with digital cameras. Therefore, the movement of a mobile reference target in relation to a stationary target will be detected on scaled digital images and back-calculated with MATLAB. The thesis shall be tested in field work previously with simplified conditions to detect the limitations of and requirements on the system as well as the accuracy and the influencing factors, like the atmosphere or a dynamic camera position. Afterwards, the method shall be applied on an actual example of a potentially instable rock tower close to N{\"o}tsch (Carinthia) to detect displacements along the shear bands and the total movement of the whole rock tower. Advantage of this technique would be the one-time installation of the reference targets in accessible areas and the constant reading of the displacements by remote sensing.",
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    AU - Buyer, Andreas Anjan

    AU - Schubert, Wulf

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    AB - It is often very difficult to perform a long-term monitoring programme to measure displacements of structures in remote areas like high rock buttes in alpine regions, where the direct installation of measurement devices and a constant reading is, due to low accessibility, not possible or too expensive. In most cases, tape extensometers or distance measurement instruments have to be installed directly on the moving rock part and a continuous reading is necessary, unless an electronic device records the measurements. The analysis of digital images to calculate the relative position of reference targets, as a form of remote sensing, seems to be an adequate alternative.This paper investigates the applicability of digital image analysis to perform long-term monitoring programmes with digital cameras. Therefore, the movement of a mobile reference target in relation to a stationary target will be detected on scaled digital images and back-calculated with MATLAB. The thesis shall be tested in field work previously with simplified conditions to detect the limitations of and requirements on the system as well as the accuracy and the influencing factors, like the atmosphere or a dynamic camera position. Afterwards, the method shall be applied on an actual example of a potentially instable rock tower close to Nötsch (Carinthia) to detect displacements along the shear bands and the total movement of the whole rock tower. Advantage of this technique would be the one-time installation of the reference targets in accessible areas and the constant reading of the displacements by remote sensing.

    KW - digital image processing

    KW - remote sensing

    KW - monitoring

    KW - displacements

    M3 - Poster

    ER -