Blar i NTNU Open på forfatter "Gigilashvili, Davit"
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Appearance Manipulation in Spatial Augmented Reality using Image Differences
Gigilashvili, Davit; Trumpy, Giorgio (Peer reviewed; Journal article, 2022)Rapidly emerging augmented reality technologies enable us to virtually alter appearance of objects and materials in a fast and efficient way. The state-of-the-art research shows that the human visual system has a poor ... -
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 cues explain the impact of translucency on perceived gloss?
Gigilashvili, Davit; Jayed Islam, Akib (Peer reviewed; Journal article, 2023)Gloss perception is a complex psychovisual phenomenon, whose mechanisms are not yet fully explained. Instrumentally measured surface reflectance is usually poor predictor of human perception of gloss. The state-of-the-art ... -
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 ... -
COLOR NAMING AND CONSTANCY OF 3D TRANSLUCENT OBJECTS
Gigilashvili, Davit; Amirkhanashvili, Ana (Journal article, 2023)A large body of research on color constancy and naming of colors is based on flat homogeneous patches. Even though recent studies highlight the importance of studying color in context of 3D objects and scenes, they usually ... -
Computational techniques for virtual reconstruction of fragmented archaeological textiles
Gigilashvili, Davit; Lukesova, Hana; Gulbrandsen, Casper Fabian; Harijan, Akash; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2023)Archaeological artifacts play important role in understanding the past developments of the humanity. However, the artifacts are often highly fragmented and degraded, with many details and parts missing due to centuries’ ... -
Does Motion Increase Perceived Magnitude of Translucency?
Gigilashvili, Davit; Diaz Estrada, David Norman; Lakshay, Jain (Peer reviewed; Journal article, 2023)The visual mechanisms behind our ability to distinguish translucent and opaque materials is not fully understood. Disentanglement of the contributions of surface reflectance and subsurface light transport to the still image ... -
Exploring the role of caustics in translucency perception — An eye tracking approach
Gigilashvili, Davit; Sole, Aditya Suneel; Nath, Shaikat Deb; Pedersen, Marius (Peer reviewed; Journal article, 2022)Translucency is an important appearance attribute. The caustic patterns that are cast by translucent objects onto another surface encapsulate information about subsurface light transport properties of a material. A previous ... -
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 ... -
The Impact of Optical and Geometrical Thickness on Perceived Translucency Differences
Gigilashvili, Davit; Urban, Philipp; Thomas, Jean Baptiste; Pedersen, Marius; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2022)In this work we study the perception of suprathreshold translucency differences to expand the knowledge about material appearance perception in imaging and computer graphics, and 3D printing applications. Translucency is ... -
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, ...