• Additive manufacturing of multilayered polymer composites: Durability assessment 

      Payami Golhin, Ali; Srivastava, Chaman; Tingstad, Jens Fossan; Sole, Aditya Suneel; Strandlie, Are; Grammatikos, Sotirios (Chapter, 2022)
      This study examines the impact of additive manufacturing (AM) settings on the durability of 3D-printed polymer composite objects in terms of object color appearance and corresponding mechanical properties when subjected ...
    • 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, ...
    • BRDF representation in response to the build orientation in 3D-printed digital materials 

      Payami Golhin, Ali; Sole, Aditya Suneel; Strandlie, Are (Peer reviewed; Journal article, 2023)
      Additively manufactured (AM) parts still lack a thorough understanding of their optical properties, particularly surface texture and reflectance characteristics at different viewing angles. This study examines the reflectance ...
    • Characterising appearance of gold foils and gilding in conservation and restoration 

      Arteaga, Yoko; Sole, Aditya Suneel; Hardeberg, Jon Yngve; Boust, Clotilde (Peer reviewed; Journal article, 2022)
      Materials with complex optical properties like gold foils are commonly used for gilding in the field of conservation and restoration to render the visual appearance of the restoration object. Characterising the appearance ...
    • Color appearance in rotational material jetting 

      Payami Golhin, Ali; Sole, Aditya Suneel; Strandlie, Are (Peer reviewed; Journal article, 2022)
      Material jetting (MJT) is a recognized additive manufacturing (AM) method to combine various materials and create a wide range of designed appearances. However, the measured color of MJT objects is frequently different ...
    • Densely Residual Network with Dual Attention for Hyperspectral Reconstruction from RGB Images 

      Wang, Lixia; Sole, Aditya Suneel; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2022)
      In the last several years, deep learning has been introduced to recover a hyperspectral image (HSI) from a single RGB image and demonstrated good performance. In particular, attention mechanisms have further strengthened ...
    • Effects of accelerated aging on the appearance and mechanical performance of materials jetting products 

      Payami Golhin, Ali; Srivastava, Chaman; Strandlie, Are; Sole, Aditya Suneel; Grammatikos, Sotirios (Peer reviewed; Journal article, 2023)
      As a result of the associated costs and environmental impacts, Material Jetting (MJT) plays a limited role in Additive Manufacturing (AM). Research on the durability and long-term performance of MJT objects by evaluating ...
    • 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 ...
    • Evaluation of Dye-Sublimation Printing Inks Used for Textile Printing 

      Sole, Aditya Suneel; Modi, Aditi; Naikare, Shubham; Jirwankar, Abhishek; Tambe, Dattatray; Kanade, Shrikala; Nahar, Swati (Peer reviewed; Journal article, 2022)
      Dye-sublimation printing is a modern digital printing technology that is being used more and more for textile printing. Classifying and identifying ink produced by the different manufacturers can be important to understand ...
    • 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 ...
    • Functional and Optical Properties of Structured Surfaces in Additive Manufacturing: Technologies for appearance evaluation in the quality assurance of 3D-printed polymers 

      Golhin, Ali Payami (Doctoral theses at NTNU;2023:178, Doctoral thesis, 2023)
      Quality assurance of additively manufactured parts requires assessment of appearance and surface finish quality. Appearance investigation is a primary step to ensure that the manufactured parts meet the required structural, ...
    • Image Content and Hand Writing Analysis of the Dead Sea Scrolls 

      Dale, Erik; Fjørkenstad, Håvard Østli; Pursley, Yeshi Jampel (Bachelor thesis, 2022)
      Institutt for informasjonssikkerhet og kommunikasjonsteknologi (IIK) ved Norges teknisk-naturvitenskapelige universitet (NTNU) i Gjøvik ønsket en måte å automatisk ta ut informasjon, for eksempel bokstaver, fra Dødehavsrullene, ...
    • Image-Based Bidirectional Reflectance Measurement of Non-Diffuse and Gonio-Chromatic Materials 

      Sole, Aditya Suneel (Doctoral theses at NTNU;2019:344, Doctoral thesis, 2019)
      Visual appearance of packaging material can vary in terms of perceived colour or lightness properties with a change in illumination and viewing directions mainly due to its optical properties. This gives a desirable visual ...
    • A mathematical model for gloss prediction of 2D prints 

      Saric, Donatela; Kraushaar, Andreas; Sole, Aditya Suneel (Peer reviewed; Journal article, 2023)
      Predicting the final appearance of a print is crucial in the graphic industry. The aim of this work is to build a mathematical model to predict the visual gloss of 2D printed samples. We conducted a psychophysical experiment ...
    • 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 ...
    • 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 ...
    • Optimized light source spectral power distribution for RGB camera based spectral reflectance recovery 

      Wang, Lixia; Sole, Aditya Suneel; Hardeberg, Jon Yngve; Wan, Xiaoxia (Peer reviewed; Journal article, 2021)
      The accuracy of recovered spectra from camera responses mainly depends on the spectral estimation algorithm used, the camera and filters selected, and the light source used to illuminate the object. We present and compare ...
    • Simulator for Lokførerskolen 

      Ip, Marco; Karpowicz, Michael-Angelo; Kragset, Julian (Bachelor thesis, 2022)
      DeskSim er et togsimuleringsprogram skapt i jMonkeyEngine av Lokførerskolen, som har formålet å lære studenter prinsippene av togkunduktering gjennom å gi dem et tryggt miljø hvor de kan få førstehånds erfaring. Vi ble ...