Blar i NTNU Open på forfatter "Farup, Ivar"

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    • CT Scanning as a Tool for Quality Assurance and Additive Manufacturing 

      Norbye, Eirik Gjertsen; Island, Sander; Tingstad, Jens Fossan (Bachelor thesis, 2022)
      Additiv tilvirkning er i stadig vekst og kan erstatte konvensjonell produksjon på mange områder, og behovet for kvalitetssikring er stort. Jotne EPM Technology er en ledende aktør innen utveksling av produktdata. De vil ...

    • Demosaicing of periodic and random colour filter arrays by linear anisotropic diffusion 

      Thomas, Jean-Baptiste; Farup, Ivar (Journal article; Peer reviewed, 2018)
      The authors develop several versions of the diffusion equation to demosaic color filter arrays of any kind. In particular, they compare isotropic versus anisotropic and linear versus non-linear formulations. Using these ...

    • Error reduction through post processing for wireless capsule endoscope video 

      Floor, Pål Anders; Farup, Ivar; Pedersen, Marius; Hovde, Øistein (Peer reviewed; Journal article, 2020)
      The wireless capsule endoscope (WCE) is a pill-sized device taking images, which are transmitting to an on-body receiver, while traveling through the digestive system. Since image data is transmitted through the human body, ...

    • Evaluating an image based multi-angle measurement setup using different reflection models 

      Sole, Aditya Suneel; Farup, Ivar; Nussbaum, Peter (Journal article; Peer reviewed, 2017)
      Image based measurement setups are widely used for multidirectional reflectance measurements of materials. Different reflection models are used to estimate the material reflectance. In this paper we use two commonly ...

    • Evaluating an image-based bidirectional reflectance distribution function measurement setup 

      Sole, Aditya Suneel; Farup, Ivar; Nussbaum, Peter; Tominaga, Shoji (Journal article; Peer reviewed, 2018)
      We evaluate an image-based multiangle bidirectional reflectance distribution function measurement setup by comparing it to measurements from two commercially available goniospectrophotometers. The image-based setup uses ...

    • Evaluating color vision deficiency daltonization methods using a behavioral visual-search method 

      Simon-Liedtke, Joschua Thomas; Farup, Ivar (Journal article; Peer reviewed, 2016)
      Daltonization methods are used to automatically improve color images for color-deficient people. A comparison of different daltonization methods, however, is still left undone. We propose a visual-search method to evaluate ...

    • Evaluation of Algorithms for the Determination of Color Gamut Boundaries 

      Bakke, Arne Magnus; Farup, Ivar; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2010)
      Several techniques for the computation of gamut boundaries have been presented in the past. In this article we take an in-depth look at some of the gamut boundary descriptors used when performing today's gamut mapping ...

    • Experimental comparison of face/non-face classifiers 

      Farup, Ivar; Hjelmås, Erik (Høgskolen i Gjøviks rapportserie, Research report, 2001)
      Most face detection algorithms can be divided into two sub-problems, initial visual guidance and face/ non-face classification. In this paper vi propose an evaluation protocol for face/ non-face classification and provide ...

    • Exploring Imaging Methods for In Situ Measurements of the Visual Appearance of Snow 

      Nguyen, Mathieu; Thomas, Jean-Baptiste Denis; Farup, Ivar (Peer reviewed; Journal article, 2024)
      We explored imaging methods to perform in situ field measurements of physical correlates of the visual appearance of snow. Measurements were performed at three locations in Norway between February and March 2023. We used ...

    • Fargestyring i produksjon og presentasjon av digital video : forprosjektrapport til Prokom 

      Andresen, Sigmund; Farup, Ivar; Hardeberg, Jon Yngve; Korten, Jens Uwe; Skarsbø, Sven Erik; Stjernvang, Gudmund (Høgskolen i Gjøviks rapportserie, Research report, 2001)
      I denne forprosjektstudien har arbeidsgruppen fra HiL og HiG vurdert hvilke metoder som kan benyttes til fargestyring (color management) i digital video. På bakgrunn av litteraturstudier, drøftinger og simuleringer har ...

    • Gamut Mapping in RGB Colour Spaces with the Iterative Ratios Diffusion Algorithm 

      Gatta, Carlo; Farup, Ivar (Journal article; Peer reviewed, 2017)
      ifferent reproduction devices can have different sets of re-producible colours. These sets are called gamuts. The processof transforming colours from one device (or image) gamut to an-other is called gamut mapping. Gamut ...

    • Geodesic calculation of color difference formulas and comparison with the munsell color order system 

      Pant, Dibakar Raj; Farup, Ivar (Journal article; Peer reviewed, 2013)
      Riemannian metric tensors of color difference formulas are derived from the line elements in a color space. The shortest curve between two points in a color space can be calculated from the metric tensors. This shortest ...

    • HEEE - Handler for Exceptionally Exceptional Exceptions 

      Solheim, Vegard; Trollebø, Olafur Johan Martinsson; Westby, Lars Walter; Steen, Aleksander (Bachelor thesis, 2016-08-23)
      All software has errors, which in many programming languages are expressed as exceptions. Innit AS is hosting software for its customers, and currently manually has to handle exception reports from its systems. They therefore ...

    • Hyperbolic geometry for colour metrics 

      Farup, Ivar (Journal article; Peer reviewed, 2014)
      It is well established from both colour difference and colour order perpectives that the colour space cannot be Euclidean. In spite of this, most colour spaces still in use today are Euclidean, and the best Euclidean colour ...

    • Hyperbolic geometry for colour metrics 

      Farup, Ivar (Journal article; Peer reviewed, 2014)
      It is well established from both colour difference and colour order perpectives that the colour space cannot be Euclidean. In spite of this, most colour spaces still in use today are Euclidean, and the best Euclidean colour ...

    • Image-based Estimation of Physical Correlates of the Visual Appearance of Snow 

      Nguyen, Mathieu (Doctoral theses at NTNU;2024:69, Doctoral thesis, 2024)
      The most common representation of snow is to describe it as a white and cold powder material that is usually found in winter or specific areas of the world. It can also be associated with the Christmas festivities, winter ...

    • Impact of training data on LMMSE demosaicing for Colour-Polarization Filter Array 

      Dumoulin, Ronan; Lapray, Pierre-Jean; Thomas, Jean-Baptiste Denis; Farup, Ivar (Chapter, 2023)
      Linear minimum mean square error can be used to demosaic images from a colour-polarization filter array sensor. However, the role of training data on its performance is yet an open question. We study the model selection ...

    • Individualised Halo-Free Gradient-Domain Colour Image Daltonisation 

      Farup, Ivar (Peer reviewed; Journal article, 2020)
      Daltonisation refers to the recolouring of images such that details normally lost by colour vision deficient observers become visible. This comes at the cost of introducing artificial colours. In a previous work, we presented ...

    • Interpolation of the MacAdam ellipses 

      Chevallier, Emmanuel; Farup, Ivar (Journal article; Peer reviewed, 2018)
      This paper is an attempt to provide a rigorous basis to the interpolation of the MacAdam ellipses. It starts by defining criteria used to compare the different possible interpolations. Then several interpolation strategies ...

    • Investigating the Kokhanovsky snow reflectance model in closerange spectral imaging 

      Nguyen, Mathieu; Thomas, Jean Baptiste; Farup, Ivar (Chapter, 2021)
      The internal structure of the snow and its reflectance function play a major contribution in its appearance. We investigate the snow reflectance model introduced by Kokhanovsky and Zege in a close-range imaging scale. By ...