• Color Image Modification with and without Hue Preservation 

      Poddar, Shashi; Pedersen, Marius; Karar, Vinod (Journal article; Peer reviewed, 2018)
      Color image modification is an essential component for several applications and the grayscale transformation is generally mapped to the color image indirectly. Although several techniques have been used for this transfer, ...
    • Colour-to-greyscale image conversion by linear anisotropic diffusion of perceptual colour metrics 

      Farup, Ivar; Pedersen, Marius; Alsam, Ali (Chapter, 2018)
      We present an algorithm for conversion of colour images to greyscale. The underlying idea is that local perceptual colour differences in the colour image should translate into local differences in greylevel in the greyscale ...
    • Comparing the Chromatic Contrast Sensitivity in Vertical and Oblique Orientations 

      Amirshahi, Seyed Ali; Pedersen, Marius; Beghdadi, Azeddine (Journal article; Peer reviewed, 2019)
      While for many years achromatic contrast sensitivity has been widely studied by different research groups from various fields of work, the same attention has not been paid to chromatic contrast sensitivity. Due to the ...
    • Comparison of eye tracking devices used on printed images 

      Komínková, Barbora; Pedersen, Marius; Hardeberg, Jon Yngve; Kaplanová, Marie (Proceedings of SPIE;6806, Journal article; Peer reviewed, 2008)
      Eye tracking as a quantitative method for collecting eye movement data, requires the accurate knowledge of the eye position, where eye movements can provide indirect evidence about what the subject sees. In this study two ...
    • Content-based image quality assessment 

      Pedersen, Marius; Cherepkova, Olga (Peer reviewed; Journal article, 2020)
      In this work we investigate the influence of image content on image quality assessment. We describe image content through a set of features, such as busyness, colorfulness, lightness, sharpness and entropy, investigating ...
    • Contributions to Spectral and 3D Imaging Technology for Cultural Heritage Applications 

      Deger, Ferdinand H. (Doctoral thesis at NTNU 2016:183, Doctoral thesis, 2016)
      The methodological approach of this doctoral thesis is to use optical imaging and to employ the mathematical theory of regularisation methods, in order to support cultural heritage research. State-of-the-art optical imaging ...
    • A Critical Analysis on Perceptual Contrast and its Use in Visual Information Analysis and Processing 

      Beghdadi, Azeddine; Qureshi, Muhammad Ali; Amirshahi, Seyed Ali; Chetouani, Aladine; Pedersen, Marius (Peer reviewed; Journal article, 2020)
      Contrast in visible images is one of the most relevant characteristics of visual signals. Since the pioneering works performed in vision psychology and optics, different definitions have been proposed in the literature. ...
    • Data Hiding by White Modulation in Color Direct Binary Search Halftones 

      Kitanovski, Vlado; Eschbach, Reiner; Pedersen, Marius; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2017)
      In this article, the authors propose a method for hiding a visual watermark in color printed images with arbitrary, natural content. The embedded watermark is imperceptible under normal illumination, but it is revealed ...
    • Deep-STRESS Capsule Video Endoscopy Image Enhancement 

      Mohammed, Ahmed Kedir; Pedersen, Marius; Hovde, Øistein; Yildirim Yayilgan, Sule (Journal article; Peer reviewed, 2018)
      This paper proposes a unified framework for capsule video endoscopy image enhancement with an objective to enhance the diagnostic values of these images. The proposed method is based on a hybrid approach of deep learning ...
    • Detection of Orientation-Modulation Embedded Data in Color Printed Natural Images 

      Kitanovski, Vlado; Pedersen, Marius (Journal article; Peer reviewed, 2018)
      This article addresses methods for detection of orientation-modulation data embedded in color dispersed-dot-halftone images. Several state-of-the-art methods for detection of orientation-embedded data in printed halftone ...
    • Detection of worms in error diffusion halftoning 

      Pedersen, Marius; Albregtsen, Fritz; Hardeberg, Jon Yngve (Proceedings of SPIE;7242, Journal article; Peer reviewed, 2009)
      Digital halftoning is used to reproduce a continuous tone image with a printer. One of these halftoning algorithms, error diffusion, suffers from certain artifacts. One of these artifacts is commonly denoted as worms. We ...
    • Deteksjon av fisk i video 

      Alseth, Vebjørn Sundli; Bjørnstad, Thomas Faack (Bachelor thesis, 2020)
      Sammendrag: Norsk institutt for naturforskning ønsket å se om det var mulig å spare tid ved å benytte et verktøy som automatisk detekterer hvor i et gitt videomateriale en fisk passerer gjennom spalteåpningen på en fisketrapp. ...
    • Deteksjon av fisk i video 

      Alseth, Vebjørn Sundli; Bjørnstad, Thomas Faack (Bachelor thesis, 2020)
      Norsk institutt for naturforskning ønsket å se om det var mulig å spare tid ved å benytte et verktøy som automatisk detekterer hvor i et gitt videomateriale en fisk passerer gjennom spalteåpningen på en fisketrapp. Gruppen ...
    • 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, ...
    • Evaluation of color spaces for unsupervised and deep learning skin lesion segmentation 

      Osadebey, Michael; Pedersen, Marius; Waaler, Dag (Chapter, 2020)
      The reliability of skin cancer diagnosis is dependent on accurate lesion segmentation. The choice of a color space in most contributions on skin lesion segmentation for melanoma detection are based on qualitative rather ...
    • Evaluation of image quality metrics for sharpness enhancement 

      Cheng, Yao; Pedersen, Marius; Chen, Guangxue (Chapter, 2017)
      Image quality assessment has become a meaningful research field due to the explosive growth of image processing technologies in imaging industries. It is becoming more usual to quantify the quality of an image using image ...
    • Evaluation of Image Quality of State-of-art CT Vendors in the Norwegian Market 

      Pelegrina Jiménez, Antonio (Master thesis, 2015)
      This study focus in the low-contrast detectability properties of two scanners examples in the state-of-the-art from Oslo Hospital Interventional center, as examples of different technologies, being one of them Dual-Energy ...
    • Evidence of change blindness in subjective image fidelity assessment 

      Le Moan, Steven; Pedersen, Marius (Journal article; Peer reviewed, 2017)
      Change blindness is a striking phenomenon which basically means that we can look without seeing. It originates from a faulty communication between early vision (the eye) and visual working memory (the brain). In this paper, ...
    • Future Directions in Image Quality 

      Amirshahi, Seyed Ali; Pedersen, Marius (Journal article; Peer reviewed, 2019)
      With the advancements made in the field of image processing and computer vision, the last few decades have seen an increase in studies focused on image quality assessment. While this has resulted in the introduction of ...
    • Førsteklasses forskning 

      Pedersen, Marius (Chronicle, 2013-09-25)