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A. Reiterer, M. Lehmann, M. Miljanovic, H. Ali, G. Paar, U. Egly, T. Eiter, H. Kahmen:
"Deformation Monitoring using a new kind of Optical 3D Measurement System: Components and Perspectives";
Talk: 13th FIG International Symposium on Deformation Measurements and Analysis; 4th IAG Symposium on Geodesy for Geotechnical and Structural Engineering, Lissabon, Portugal; 2008-05-12 - 2008-05-15; in: "Measuring the Change", (2008), 10 pages.

High accuracy 3D representation and monitoring of objects is an increasing field
both in science and industrial applications. Up to now many tasks like monitoring of building
deformations or displacements were solved by means of artificial targets on the objects of
interest. Meanwhile mature optical 3D measurement techniques are available. Such imagebased
systems can perform their measurements even without targeting. They use the texture
on the object surface to find "interesting points" which can replace the artificial targets.
Example for a monitoring task is the stability control during the whole construction process of
engineering buildings like bridges, high-rise buildings, dams, etc. This paper gives an
overview of a new type of optical 3D measurement system and its components. It uses
learning-based object recognition techniques to search for relevant areas to collect robust
interest point candidates to be long-term tracked to provide a deformation database. The task
of deformation analysis is on one hand based on a traditional geodetic deformation analysis
process and on the other hand on a new developed procedure called deformation assessment.
The main goal of this development is to measure, analyse and interpret object deformations
by means of a highly automated process. We focus on key functional components,
development stage and perspectives of the developed system.

Project Head Alexander Reiterer:
i-MeaS - Ein intelligentes bildgestütztes Messsystem für die Überwachung von Felsstürzen