• Mobile LiDAR-Based Convergence Detection in Underground Tunnel Environments 

      Lynch, Brian K.; Marr, Jordan; Marshall, Joshua A.; Greenspan, Michael (2017-04-06)
      This paper presents a mobile LiDAR-based method for remotely identifying convergence (i.e., naturally occurring deformation) in excavated underground tunnel environments. A mobile LiDAR system is used to collect and generate ...
    • Registration of Noisy Point Clouds Using Virtual Interest Points 

      Ahmed, Mirza Tahir; Mohamad, Mustafa; Marshall, Joshua A.; Greenspan, Michael (2016-03-04)
      A new method is presented for robustly and efficiently registering two noisy point clouds. The registration is driven by establishing correspondences of virtual interest points, which do not exist in the original point ...
    • Visual Indoor Positioning with a Single Camera Using PnP 

      Deretey, Edith; Ahmed, Mirza Tahir; Marshall, Joshua A.; Greenspan, Michael (2016-02-23)
      This paper introduces an accurate and inexpensive method for localizing a calibrated monocular camera in 3D indoor environments. The objective of this work is to localize in 6 degrees-of-freedom (6 DOF) in the presence of ...