Browsing by Author "Thomassen, Jan Brede"

Now showing items 1-8 of 8

    • Detection: how many pixels are required? 

      Rheenen, Arthur Dirk van; Thomassen, Jan Brede (2020-09-23)
      In this work, we studied how detection range of a small target changes as a function of the number of defined target pixels. The intuitively simplest method to look for a target in IR images is to look for the “hottest” ...

    • The FESTER field trial 

      Eijk, Alexander M. J. van; Gunter, Willem H.; February, Faith; Maritz, Benita; Vrahimis, George; Koago, Mokete S.; Wainman, Carl; Eisele, Christian; Seiffer, Dirk Peter; Sucher, Erik; Stein, Karin; Iersel, Miranda van; Cohen, Leo H.; Binsbergen, Sven A. van; Heemskerk, H. J. M. (Eric); Sternberg, Armin; Schulte, Helmut; van Rheenen, Arthur; Brendhagen, Erik; Thomassen, Jan Brede; Griffith, Derek (2016)
      An overview is given of the First European – South African Transmission ExpeRiment (FESTER), which took place in South Africa, over the False Bay area, centered around Simon’s Town. The experiment lasted from April 2015 ...

    • FESTER: a propagation experiment, overview and first results 

      Eisele, Christian; Seiffer, Dirk Peter; Stein, Karin; Sucher, Erik; Gunter, Willem H.; February, Faith; Vrahimis, George; Wainman, Carl; Maritz, Benita; Koago, Mokete S.; Eijk, Alexander M. J. van; Iersel, Miranda van; Cohen, Leo H.; Binsbergen, Sven A. van; Heemskerk, H. J. M. (Eric); Sternberg, Armin; Schulte, Helmut; van Rheenen, Arthur; Thomassen, Jan Brede; Brendhagen, Erik; Griffith, Derek (2016)
      A long term field trial called FESTER (First European South African Transmission Experiment) has been conducted by an international collaboration of research organizations during the course of almost one year at False Bay, ...

    • MRTD: Man versus machine 

      Rheenen, Arthur Dirk van; Taule, Petter; Thomassen, Jan Brede; Madsen, Eirik Blix (2018)
      We present Minimum-Resolvable Temperature Difference (MRTD) curves obtained by letting an ensemble of observers judge how many of the six four-bar patterns they can “see” in a set of images taken with different bar-to-background ...

    • MRTD: to NUC or not to NUC? 

      Rheenen, Arthur Dirk van; Thomassen, Jan Brede (2020-09-21)
      We applied a simple method to estimate the Minimum Resolvable Temperature Difference (MRTD) of an LWIR and an MWIR camera. A so-called Siemens star, in our case a thin, black aluminum plate framing a circle that is missing ...

    • Obtaining spectral information from infrared scenarios using hyper-spectral cameras and cameras with spinning filter wheel 

      Glimsdal, Eirik; Brendhagen, Erik; Thomassen, Jan Brede; Rheenen, Arthur Dirk Van; Heen, Lars Trygve (2014)
      In the past decades the Norwegian Defence Research Establishment (FFI) has recorded and characterized infrared scenarios for several application purposes, such as infrared target and background modeling and simulation, ...

    • Sensitivity of input parameters to modelling of atmospheric transmission of long-wave infrared radiation at sea under warm and humid conditions 

      Thomassen, Jan Brede; Rheenen, Arthur Dirk van; Madsen, Eirik Blix; Pszczel, Mark; Bilton, Nicola; Pushkarov, Oleksandr (2018)
      A joint Australian-Norwegian eld trial (Osprey) was held in February 2018 in Darwin, Australia. The objective of this trial was to measure IR transmission properties of the atmosphere in a marine environment under warm and ...

    • Three-dimensional signal decomposition of infrared image sequences and large-scale non-uniformity analysis 

      Thomassen, Jan Brede; Rheenen, Arthur Dirk van (2020-09-20)
      The three-dimensional noise model is a methodology to analyse the noise of a thermal imaging sensor, such as an infrared (IR) camera. This allows us to decompose a noisy signal into components and quantify properties such ...