• A Model of Visual Opacity for Translucent Colorants 

      Midtfjord, Helene B.; Green, Philip John; Nussbaum, Peter (Journal article; Peer reviewed, 2018)
      Potential methods for predicting the visual impression of the opacity of translucent white ink were evaluated. An experiment was conducted to collect visual data for white ink coatings on three different substrates: white ...
    • Appearance Characterization of Textiles 

      Conni, Michele (Doctoral theses at NTNU;2022:10, Doctoral thesis, 2022-01-13)
      The appearance of an object is the combination of the physical attributes that influence the human visual perception of the object itself. The most prominent of these attributes are colour, gloss, translucency and texture. ...
    • Assessment and Design of Color Vision Deficiency Simulation and Daltonization Methods 

      Simon-Liedtke, Joschua Thomas (Doctoral theses at NTNU;2017:8, Doctoral thesis, 2017)
      Color vision in humans evolved because it improves behavioral responses related, for example, to the guidance of attention, object recognition and detection of emotional states. However, people with color vision deficiencies ...
    • Bidirectional Reflectance Measurement and Reflection Model Fitting of Complex Materials Using an Image-Based Measurement Setup 

      Sole, Aditya Suneel; Farup, Ivar; Nussbaum, Peter; Tominaga, Shoji (Journal article; Peer reviewed, 2018)
      Materials with a complex visual appearance, like goniochromatic or non-diffuse, are widely used for the packaging industry. Measuring optical properties of such materials requires a bidirectional approach, and therefore, ...
    • CCAD: A Basic Sample Database for Modeling Common Color Appearance 

      Yuan, Jiangping (Master thesis, 2016-08-30)
      The consistency assessment of a set of cross-media color reproductions is an urgent research topic in color application field. This is enhanced by the various gamut devices which make it impossible to match exactly using ...
    • Estimating visual difference between reproduction gamuts: moving our pilot study from the lab to online delivery 

      High, Gregory Paul; Nussbaum, Peter; Green, Philip John (Chapter, 2021)
      Images reproduced for different output devices are known to be limited in the range of colours that can be reproduced. It is accepted that reproductions made with different print processes, and on different substrates, ...
    • 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 ...
    • How accurate is an online test for colour vision deficiency? 

      Gjærde, Kari Bjerke; Kvitle, Anne Kristin; Green, Philip John; Nussbaum, Peter (Journal article, 2021)
      This study explores the accuracy and specificity of an on-line version of a standardized colour vision deficiency test – the Hardy-Rand-Rittler test (HRR) performed in an uncontrolled environment. A group of 25 observers ...
    • Measurement and rendering of complex non-diffuse and goniochromatic packaging materials 

      Sole, Aditya Suneel; Guarnera, Giuseppe Claudio; Farup, Ivar; Nussbaum, Peter (Peer reviewed; Journal article, 2020)
      Realistic renderings of materials with complex optical properties, such as goniochromatism and non-diffuse reflection, are difficult to achieve. In the context of the print and packaging industries, accurate visualisation ...
    • Methods for psychophysical assessment of colour difference by observers with a colour vision deficiency 

      Kvitle, Anne Kristin; Oddløkken, Henrik; Green, Philip John; Nussbaum, Peter (Chapter, 2018)
    • Proceedings from Gjøvik Color Imaging Symposium 2007 

      Hardeberg, Jon Yngve; Nussbaum, Peter; Pedersen, Marius (Høgskolen i Gjøviks rapportserie;, Research report, 2007)
    • Quality of color coding in maps for color deficient observers 

      Kvitle, Anne Kristin; Pedersen, Marius; Nussbaum, Peter (Journal article; Peer reviewed, 2016)
      For a color deficient observer, the quality of a map or other information design may be defined as the ability to extract features. As color is such important conveyor of information, the colors need to appear correct and ...
    • Unsupervised Clustering of Hyperspectral Paper Data Using t-SNE 

      Melit Devassy, Binu; George, Sony; Nussbaum, Peter (Peer reviewed; Journal article, 2020)
      For a suspected forgery that involves the falsification of a document or its contents, the investigator will primarily analyze the document’s paper and ink in order to establish the authenticity of the subject under ...
    • Using gaze information to improve image difference metrics 

      Pedersen, Marius; Hardeberg, Jon Yngve; Nussbaum, Peter (Proceedings of SPIE;6806, Journal article; Peer reviewed, 2008)
      We have used image difference metrics to measure the quality of a set of images to know how well they predict perceived image difference. We carried out a psychophysical experiment with 25 observers along with a recording ...
    • Visual and data stationarity of texture images 

      Conni, Michele; Deborah, Hilda; Nussbaum, Peter; Green, Philip John (Peer reviewed; Journal article, 2021)
      The stationarity of a texture can be considered a fundamental property of images, although the property of stationarity is difficult to define precisely. We propose a stationarity test based on multiscale, locally stationary, ...