Toplam kayıt 9, listelenen: 1-9

  • 3d modeling of cultural heritage objects with a structured light system 

    Akça, Mehmet Devrim (Univ Agean, 2012)
    3D modeling of cultural heritage objects is an expanding application area. The selection of the right technology is very important and strictly related to the project requirements, budget and user's experience. The ...
  • Co-registration of 3d point clouds by using an errors-in-variables model 

    Akça, Mehmet Devrim; Aydar, Umut; Altan, Mehmet Orhan; Akyılmaz, Orhan; Shortis, M; Mills, J (Copernicus Gesellschaft Mbh, 2012-08-25)
    Co-registration of point clouds of partially scanned objects is the first step of the 3D modeling workflow. The aim of co-registration is to merge the overlapping point clouds by estimating the spatial transformation ...
  • Co-registration of Surfaces by 3D Least Squares Matching 

    Akça, Mehmet Devrim (AMER SOC PHOTOGRAMMETRY, 2010-03)
    A method for the automatic co-registration of 3D surfaces is presented. Die method utilizes the mathematical model of Least Squares 2D image matching and extends it for solving the 3D surface matching problem The transformation ...
  • Determining pull - out deformations of bonded metal anchors embedded in concrete by means of photogrammetry 

    Akça, Mehmet Devrim; Avşar, Edip O.; Altan, Mehmet Orhan; Doğan, Umut Anıl; Shortis, M; Mills, J (Copernicus Gesellschaft Mbh, 2012-08-25)
    Chemical anchorages are applied in many engineering implementations, particularly strengthening of reinforced concrete structures. During strengthening procedure; chemical anchorages should be tested, since they supply to ...
  • An emprical point error model for TLS derived point clouds 

    Akça, Mehmet Devrim (International Society for Photogrammetry and Remote Sensing, 2016-07-12)
    The random error pattern of point clouds has significant effect on the quality of final 3D model. The magnitude and distribution of random errors should be modelled numerically. This work aims at developing such an anisotropic ...
  • Laboratory flume experiment with a coded structured light system 

    Akça, Mehmet Devrim; Seybold, Hansjorg; Shortis, M; Mills, J (Copernicus Gesellschaft Mbh, 2012-08-25)
    The topography of inland deltas is influenced chiefly by the water-sediment balance in distributary channels and local evaporation and seepage rates. In a previous study, a reduced complexity model has been applied to ...
  • Photogrammetric Monitoring of an Artificially Generated Shallow Landslide 

    Akça, Mehmet Devrim (Wiley-Blackwell, 2013-06)
    An artificial rainfall event was applied to a forested slope in Ruedlingen, northern Switzerland. The experiment triggered a landslide which resulted in mobilising about 130m3 of debris. The event was monitored by a ...
  • Quality assessment of 3D building data 

    Akça, Mehmet Devrim; Freeman, Mark; Sargent, Isabel; Gruen, Armin (Wiley-Blackwell Publishing, 2010-12)
    Three-dimensional building models are often now produced from lidar and photogrammetric data. The quality control of these models is a relevant issue both from the scientific and practical points of view. This work presents ...
  • Topography of inland deltas: Observations, modeling, and experiments 

    Seybold, H. J.; Molnar, P.; Akça, Mehmet Devrim; Doumi, M.; Tavares, M. Cavalcanti; Shinbrot, T.; Andrade, J. S., Jr.; Kinzelbach, W.; Herrmann, H. J. (AMER GEOPHYSICAL UNION, 2010-04-28)
    The topography of inland deltas is influenced by the water-sediment balance in distributary channels and local evaporation and seepage rates. In this letter a reduced complexity model is applied to simulate inland delta ...