• 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 ...
    • Caustics and Translucency Perception 

      Gigilashvili, Davit; Dubouchet, Lucas; Hardeberg, Jon Yngve; Pedersen, Marius (Peer reviewed; Journal article, 2020)
      Caustics projected onto the surface carry very interesting information regarding the material they are cast by. It has been observed in previous studies that caustics could be a widely used cue for translucency assessment ...
    • Color Naming and Communication of Color Appearance: Is it Different for Native Georgian Speakers? 

      Amirkhanashvili, Ana; Gigilashvili, Davit (Peer reviewed; Journal article, 2020)
      Color is one of the most prominent appearance attributes. The terms used by humans to communicate color appearance and to set categorical boundaries in the color space have long been a point of scholarly interest. Two ...
    • 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 ...
    • Image Statistics as Glossiness and Translucency Predictor in Photographs of Real-world Objects 

      Gigilashvili, Davit; Tanaka, Midori; Pedersen, Marius; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2020)
      We interpret our surrounding based on the visual stimuli, and perceive objects and materials around us to have various attributes, like color, glossiness, and translucency. We analyze the three-dimensional world based on ...
    • 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 ...
    • Material Appearance: Ordering and Clustering 

      Gigilashvili, Davit; Thomas, Jean-Baptiste; Pedersen, Marius; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2019)
      Appearance is a complex psychovisual phenomenon impacted by various objective and subjective factors that are not yet fully understood. In this work we use real objects and unconstrained conditions to study appearance ...
    • Measuring and Mitigating Speckle Noise in Dual-Axis Confocal Microscopy Images 

      Gigilashvili, Davit (Master thesis, 2017)
      Speckle noise is a form of multiplicative noise that corrupts the quality of medical images. It is well described and studied in medical ultrasound imaging, but less attention has been paid to its presence in reflectance ...
    • On the Acquisition and Reproduction of Material Appearance 

      Sole, Aditya Suneel; Gigilashvili, Davit; Midtfjord, Helene B.; Guarnera, Dar'ya; Guarnera, Giuseppe Claudio; Thomas, Jean-Baptiste; Hardeberg, Jon Yngve (Chapter, 2019)
      Currently, new technologies (e.g. 2.5D and 3D printing processes) progress at a fast pace in their capacity to (re)produce an ever-broader range of visual aspects. At the same time, a huge research effort is needed to ...
    • On the Acquisition and Reproduction of Material Appearance 

      Sole, Aditya Suneel; Gigilashvili, Davit; Midtfjord, Helene B.; Guarnera, Dar'ya; Guarnera, Giuseppe Claudio; Thomas, Jean-Baptiste; Hardeberg, Jon Yngve (Chapter, 2019)
      Currently, new technologies (e.g. 2.5D and 3D printing processes) progress at a fast pace in their capacity to (re)produce an ever-broader range of visual aspects. At the same time, a huge research effort is needed to ...
    • On the appearance of objects and materials: Qualitative analysis of experimental observations 

      Gigilashvili, Davit; Thomas, Jean Baptiste; Pedersen, Marius; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2021)
      Perception of appearance of different materials and objects is a complex psychophysical phenomenon and its neurophysiological and behavioral mechanisms are far from being fully understood. The various appearance attributes ...
    • On the Appearance of Translucent Objects: Perception and Assessment by Human Observers 

      Gigilashvili, Davit (Doctoral theses at NTNU;2021:201, Doctoral thesis, 2021)
      Appearance characterizes visual features of objects and materials. It is a multiplex psychovisual phenomenon that is usually broken into several appearance attributes for simplification of its measurement and communication, ...
    • On the Nature of Perceptual Translucency 

      Gigilashvili, Davit; Thomas, Jean Baptiste; Hardeberg, Jon Yngve; Pedersen, Marius (Journal article, 2020)
      Translucency is an appearance attribute used to characterize materials with some degree of subsurface light transport. Although translucency as a radiative transfer inside the medium is relatively well understood, translucency ...
    • 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 ...
    • The Role of Subsurface Scattering in Glossiness Perception 

      Gigilashvili, Davit; Shi, Weiqi; Wang, Zeyu; Pedersen, Marius; Hardeberg, Jon Yngve; Rushmeier, Holly (Peer reviewed; Journal article, 2021)
      This study investigates the potential impact of subsurface light transport on gloss perception for the purposes of broadening our understanding of visual appearance in computer graphics applications. Gloss is an important ...
    • Translucency perception: A review 

      Gigilashvili, Davit; Thomas, Jean Baptiste; Hardeberg, Jon Yngve; Pedersen, Marius (Peer reviewed; Journal article, 2021)
      Translucency is an optical and a perceptual phenomenon that characterizes subsurface light transport through objects and materials. Translucency as an optical property of a material relates to the radiative transfer inside ...