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  • 1.
    Lepistö, Niklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    FPGA based architectures for embedded video systems2008Licentiate thesis, comprehensive summary (Other scientific)
  • 2.
    Lepistö, Niklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Integration of industrial systems on FPGAs - Handling of communication in a reconfigurable system2004Report (Other academic)
    Abstract [en]

    The production of embedded industrial systems can often be made more profitable by designing systems that are flexible. In this way a specific system can be marketed to a large number of customers with different requirements. During the last few years new advances in semiconductor production technology and an increasing market for configurable logic has made it possible to use FPGA based designs in situations where it has earlier been uneconomical. This thesis evaluates the possibility to use FPGA based communication devices to increase the flexibility of a system. As a part of this evaluation an existing design has been implemented in an FPGA to investigate the possibilities and advantages of an FPGA based solution. The goal was to design a test system and implement a UART and CAN-controller in an FPGA. The FPGA designs have been based on existing open source IP-cores. The work has resulted in a functioning UART implementation an a CAN-controller implementation with only parts of the intended functionality, the test system that was designed contains some errors that need to be fixed for further development to be possible. This thesis has been a part of a larger project that also has targeted the implementation of other functionality than that described in this document. Some of the tasks described have been carried out as a joint effort between the involved parties.

  • 3.
    Lepistö, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    O'Nils, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Design and Implementation of Video Pre-Processor for FPGA based SoC2008Conference paper (Refereed)
    Abstract [en]

    FPGA based implementation of embedded systems has many attractive characteristics such as: flexibility, low cost, high integration, embedded distributed memories and ex-tensive parallelism. Real-time video processing is an ap-plication area where FPGA based implementations have significant potential. This paper presents the design and implementation of a video pre-processor suitable for use in embedded display applications. Some of the key functions of the pre-processor are cropping and scaling of input video frames and the possibility to use multiple pre-processors in parallel to provide multiple video streams to a display unit

  • 4.
    Lepistö, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    O'Nils, Mattias
    Design and Implemetation of Video Pre-Processor for FPGA based SoCManuscript (Other (popular scientific, debate etc.))
  • 5.
    Lepistö, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    O'Nils, Mattias
    Low-Cost FPGA-based Display Controller Architecture with Embedded Area De-Interlacing FunctionalityManuscript (Refereed)
  • 6.
    Lepistö, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Thörnberg, Benny
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    O'Nils, Mattias
    Design Exploration of Video Pre-Processor for FPGA based SoC2006In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Berlin: Springer Verlag , 2006, Vol. 3985, p. 87-92Conference paper (Refereed)
    Abstract [en]

    FPGA based implementation of embedded systems has many attractive characteristics such as: flexibility, low cost, high integration, embedded distributed memories and extensive parallelism. One application where there is a significant possible potential for FPGA is for the implementation of real-time video processing. In this paper we present an analysis of a video pre-processor and how this affects the FPGA and RAM resource usage and performance. From these results we indicate the best space-time mapping of operations under different design constraints. These results can be used as a decision base when implementing an FPGA based video enabled display unit.

  • 7.
    Lepistö, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Thörnberg, Benny
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    O'Nils, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    High Performance FPGA based Camera Architecture for Range Imaging2005In: 23rd NORCHIP Conference 2005, IEEE conference proceedings, 2005, p. 165-168, article id 1597015Conference paper (Refereed)
    Abstract [en]

    Range imaging is often used in classification of objects in process industry. The speed of inspection needs to be high, so it does not become the bottleneck in the process. This paper presents an FPGA based architecture for range imaging. Using centre of gravity it calculates the range positions from 2D images. The results show that the proposed architecture can process range values with a performance up to 150 Msamples per second. Thus, using cheep standard technology we can achieve up to 3 times higher performance than expensive state-of-the-art high performance smart-cameras.

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