Now showing items 1-7 of 7

    • 3D target shape from SAS images based on a deformable mesh 

      Coiras, Enrique; Groen, Johannes (NURC, 2009/12)
      The seafloor can nowadays be scanned with side-looking sonar that provides a very high resolution over a large swath, which has proved beneficial for underwater target detection and classification. For systems operated at ...
    • Automatic change detection for the monitoring of cluttered underwater areas 

      Coiras, Enrique; Groen, Johannes; Evans, Benjamin; Pinto, Marc A. (NURC, 2008/09)
      Automating the surveillance of cluttered underwater areas (such as ports) poses several problems, the main one being the high number of contacts that any automatic target recognition (ATR) system will produce when surveying ...
    • AUV technology for shallow water MCM reconnaissance 

      Evans, Benjamin; Baralli, Francesco; Bellettini, Andrea; Bovio, Edoardo; Coiras, Enrique; Davies, Gary L.; Groen, Johannes; Myers, Vincent; Pinto, Marc A. (NURC, 2007/10)
      The ability to perform MCM reconnaissance missions in shallow water is important in both expeditionary MCM and in the protection of ports against maritime improvised explosive devices (MIEDs). For many years AUV systems ...
    • Detection rate statistics in synthetic aperture sonar images 

      Groen, Johannes; Coiras, Enrique; Williams, David (NURC, 2009/12)
      Synthetic aperture sonar (SAS) has proved to be successful for mine hunting andis now robust for generating high-resolution images over wide swath. The subsequent stepin the processing is detection, discriminating between ...
    • Multi-view target classification in synthetic aperture sonar imagery 

      Williams, David; Groen, Johannes (NURC, 2009/12)
      This work proposes an elegantly simple solution to the general task of classifying the shape of an object that has been viewed multiple times. Specifically, this problem is addressed in the context of underwater mine ...
    • On the effects of synthetic-aperture length on SAS seabed segmentation 

      Williams, David P.; Groen, Johannes (NURC, 2009/12)
      In this work, we quantify the relationship between synthetic-aperture length (or equivalently, along-track resolution) and seabed segmentation performance experimentally for real synthetic aperture sonar (SAS) imagery. The ...
    • Performance assessment of the MUSCLE synthetic aperture sonar 

      Couillard, Michel; Groen, Johannes; Fox, Warren L. J. (CMRE, 2014/01)
      Synthetic Aperture Sonar (SAS) systems are quickly becoming fundamental tools for seabed mapping applications, as they provide high resolution imagery independent of range from the sensor, with high area coverage rates. ...