Sökning: "Underwater sonar data processing"

Hittade 5 uppsatser innehållade orden Underwater sonar data processing.

1. 1. Track Before Detect in Active Sonar Systems

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och system

   Författare :Johnny Ljung; [2021]
   Nyckelord :signal processing; active sonar systems; track-before-detect; target tracking; reverberation; signalbehandling; aktiva sonarsystem; spårning innan detektion; målspårning; reverberation;

   Sammanfattning : Detection of an underwater target with active sonar in shallow waters such as the Baltic sea is a big challenge. This since the sound beams from the sonar will be reflected on the surfaces, sea surface and sea bottom, and the water volume itself which generates reverberation. LÄS MER

3. 2. Acoustic-Inertial Forward-Scan Sonar Simultaneous Localization and Mapping

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Aldo Teran Espinoza; [2020]
   Nyckelord :;

   Sammanfattning : The increasing accessibility and versatility of forward-scan (FS) imaging sonars (also known as forward looking sonars or FLS) has spurred the interest of the robotics community seeking to solve the difficult problem of robotic perception in low-visibility underwater scenarios. Processing the incoming data from an imaging sonar is challenging, since it captures an acoustic 2D image of the 3D scene instead of providing straightforward range measurements like other sonar technologies do (e. LÄS MER

4. 3. Semantic segmentation of seabed sonar imagery using deep learning

   Master-uppsats, Linköpings universitet/Programvara och system

   Författare :Petter Granli; [2019]
   Nyckelord :;

   Sammanfattning : For investigating the large parts of the ocean which have yet to be mapped, there is a need for autonomous underwater vehicles. Current state-of-the-art underwater positioning often relies on external data from other vessels or beacons. Processing seabed image data could potentially improve autonomy for underwater vehicles. LÄS MER

5. 4. Augmented reality with holograms for combat management systems : Performance limitations for sonar tracks in a 3D map, presented with Microsoft HoloLens

   Uppsats för yrkesexamina på grundnivå, KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Författare :Carl Uddman Lindh; Johan Norberg; [2017]
   Nyckelord :Saab Defence and Security; Microsoft HoloLens; augmented reality; 9LV Combat Management System; terrain mapping; Unity3D; protocol buffer; holograms; Saab Defence and Security; Microsoft HoloLens; förstärkt verklighet; 9LV Combat Management System; Unity3D; protocol buffer; hologram;

   Sammanfattning : Technical advancements in 3D projection has recently made presentation of holographic images possible by using self-contained devices. Instead of using a screen to present objects, glasses like Microsoft HoloLens can render objects that appear as holograms around the user. LÄS MER

7. 5. Adaptation of algorithms for underwater sonar data processing to GPU-based systems

   Master-uppsats, Institutionen för datavetenskap; Tekniska högskolan

   Författare :Patricia Sundin; [2013]
   Nyckelord :GPU processing; CUDA; OpenCL; SkePU; Performance optimization; Underwater sonar data processing;

   Sammanfattning : In this master thesis, algorithms for acoustic simulations in underwater environments are ported for GPU processing. The GPU parallel computing platforms used are CUDA, OpenCL and SkePU. The purpose of this master thesis is to adapt and evaluate the ported algorithms' performance on two modern NVIDIA GPUs, Tesla K20 and Quadro K5000. LÄS MER