• A Colour Appearance Model based on Jzazbz Colour Space 

      Safdar, Muhammad; Hardeberg, Jon Yngve; Kim, Youn Jin; Luo, Ming Ronnier (Journal article; Peer reviewed, 2018)
      The current CIE colour appearance model CIECAM02 and its variant named CAM16 can well predict common colour appearance attributes including lightness, brightness, chroma, colowfulness, saturation, hue angle, and hue ...
    • An Evaluation of Colour-to-Greyscale Image Conversion by Linear Anisotropic Diffusion and Manual Colour Grading 

      Barba, Aldo; Farup, Ivar; Pedersen, Marius (Journal article; Peer reviewed, 2019)
      In the paper "Colour-to-Greyscale Image Conversion by Linear Anisotropic Diffusion of Perceptual Colour Metrics", Farup et al. presented an algorithm to convert colour images to greyscale. The algorithm produces greyscale ...
    • Appearance perception of textiles: a tactile and visual texture study 

      Mirjalili, Fereshteh; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2019)
      Texture analysis and characterization based on human perception has been continuously sought after by psychology and computer vision researchers. However, the fundamental question of how humans truly perceive texture still ...
    • Appearance Reconstruction of Fluorescent Objects Based on Reference Geometric Factors 

      Tominaga, Shoji; Hirai, Keita; Horiuchi, Takahiko (Journal article; Peer reviewed, 2019)
      An approach is proposed for the reliable appearance reconstruction of fluorescent objects under arbitrary conditions of material and illuminant based on reference geometric factors. First, a large set of spectral images ...
    • Behavioral Investigation of Visual Appearance Assessment 

      Gigilashvili, Davit; Thomas, Jean-Baptiste; Hardeberg, Jon Yngve; Pedersen, Marius (Journal article; Peer reviewed, 2018)
      The way people judge, assess and express appearance they perceive can dramatically vary from person to person. The objective of this study is to identify the research hypotheses and outline directions for the future work ...
    • Blurring Impairs Translucency Perception 

      Gigilashvili, Davit; Pedersen, Marius; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2018)
      Translucency and factors impacting its perception is not yet fully understood. Various studies have examined the correlation between physical material properties and perceived translucency. Furthermore, the concept of ...
    • Can Image Enhancement be Beneficial to Find Smoke Images in Laparoscopic Surgery? 

      Wang, Congcong; Sharma, Vivek; Fan, Yu; Alaya Cheikh, Faouzi; Beghdadi, Azeddine; Elle, Ole Jacob; Stiefelhagen, Rainer (Journal article; Peer reviewed, 2018)
      Laparoscopic surgery has a limited field of view. Laser ablation in a laproscopic surgery causes smoke, which inevitably influences the surgeon's visibility. Therefore, it is of vital importance to remove the smoke, such ...
    • 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 ...
    • 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 ...
    • 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 ...
    • Illuminance Impacts Opacity Perception of Textile Materials 

      Gigilashvili, Davit; Mirjalili, Fereshteh; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2019)
      Opacity is an important appearance attribute in the textile industry. Obscuring power and the way textile samples block light can define product quality and customer satisfaction in the lingerie, shirting, and curtain ...
    • Impact of Shape on Apparent Translucency Differences 

      Gigilashvili, Davit; Urban, Philipp; Thomas, Jean-Baptiste; Hardeberg, Jon Yngve; Pedersen, Marius (Journal article; Peer reviewed, 2019)
      Translucency is one of the major appearance attributes. Apparent translucency is impacted by various factors including object shape and geometry. Despite general proposals that object shape and geometry have a significant ...
    • Measurement of CIELAB spatio-chromatic contrast sensitivity in different spatial and chromatic directions 

      Kitanovski, Vlado; Reed, Alastair; Falkenstern, Kristyn; Pedersen, Marius (Journal article, 2019)
      This paper presents data on CIELAB chromatic contrast sensitivity collected in a psychophysical experiment. To complement previously published data in the low-frequency range, we selected five spatial frequencies in the ...
    • Measuring, Modeling, and Reproducing Material Appearance from Specular Profile 

      Tominaga, Shoji; Guarnera, Giuseppe Claudio (Journal article; Peer reviewed, 2019)
      A method is proposed for measuring, modeling, and reproducing material appearance from the specular profile representing reflectance distribution around a specular highlight. Our method is aimed at opaque materials with a ...
    • Perceived Glossiness: Beyond Surface Properties 

      Gigilashvili, Davit; Thomas, Jean-Baptiste; Pedersen, Marius; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2019)
      Gloss is widely accepted as a surface- and illuminationbased property, both by definition and by means of metrology. However, mechanisms of gloss perception are yet to be fully understood. Potential cues generating gloss ...
    • Reviving Traditional Image Quality Metrics Using CNNs 

      Amirshahi, Seyed Ali; Pedersen, Marius; Beghdadi, Azeddine (Journal article; Peer reviewed, 2018)
      Objective Image Quality Metrics (IQMs) are introduced with the goal of modeling the perceptual quality scores given by observers to an image. In this study we use a pre-trained Convolutional Neural Network (CNN) model to ...