Browsing NTNU Open by Author "George, Sony"
Now showing items 1-20 of 62
-
3D Object Quality Metrics and their Differences: How Can We Evaluate Quality of Digitization?
Storeide, Markus Sebastian Bakken; George, Sony; Sole, Aditya Suneel; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2024)Selecting the optimal resolution and post-processing techniques of 3D objects for cultural heritage documentation is one of the most distinguishable challenges within 3D imaging. Many techniques exist to document a tangible ... -
Acquisition strategies for in-situ hyperspectral imaging of stained-glass windows: case studies from the Swiss National Museum
Babini, Agnese; Lombardo, Tiziana; Schmidt-Ott, Katharina; George, Sony; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2023)Over the last decade, hyperspectral imaging has become a popular technique for the non-invasive identification and mapping of painting materials in many typologies of artworks, thanks to the possibility of obtaining spectral ... -
An automatic image-based system for detecting wild and stocked fish
Myrum, Espen; Nørstebø, Simen Andre; George, Sony; Pedersen, Marius; Museth, Jon (Journal article; Peer reviewed, 2019)Fish stocking is the method of raising fish in a hatchery and releasing them into a river or lake to sustain or increase an existing population or to create a population. This has been practised in many countries, including ... -
Automated Salamander Recognition Using Deep Neural Networks and Feature Extraction
Bakløkken, Jørgen; Schoeler, Felix; Nørholm, Hugo (Bachelor thesis, 2019)Hensikten med dette prosjektet er å utvikle et automatisert verktøy og metode som kan identifisere salamandere ved å bruke deres individspesifikke bukmønstre. Vi har undersøkt en rekke med forskjellige eksisterende metoder ... -
Automated salamander recognition using deep neural networks and feature extraction
Bakløkken, Jørgen; Schoeler, Felix; Nørholm, Hugo; George, Sony; Pedersen, Marius; Dervo, Børre Kind (Journal article; Peer reviewed, 2019)This paper presents a study conducted to recognize salamanders by using their unique body markings based on images. The detection and matching of unique patterns in a salamander’s body can be complex due variability in ... -
Automatic Redeye Correction Algorithm with Multilevel Eye Confirmation
George, Sony; Hardeberg, Jon Yngve; George, Tomson G.; Nampoori, V. P. N. (Journal article; Peer reviewed, 2010)Redeye is a well-known problem in portrait photography. This effect is caused by the light entering the subject's eye through the pupil and reflection from the retina back to the imaging sensor. Many of the existing redeye ... -
Automatisk gjenkjenning av settefisk
Nørstebø, Simen Andre; Myrum, Espen (Bachelor thesis, 2019)Norsk institutt for naturforskning ønsket å se om det var mulig å automatisk gjenkjenne om en undervannsvideo viser en settefisk eller villfisk. I denne rapporten skal vi se nærmere på ulike metoder for å løse dette problemet ... -
Changes in the visual appearance of polychrome wood caused by (accelerated) aging
Sidorov, Oleksii; Hardeberg, Jon Yngve; George, Sony; Harvey, Joshua; Smithson, Hannah (Peer reviewed; Journal article, 2020)This work takes a step towards understanding fundamental aspects of appearance change in cultural heritage. Particularly, we concentrate on the case study of the Hedal Madonna – a polychrome wood sculpture dated to the ... -
Character-based Writer Verification of Ancient Hebrew Square-script Manuscripts: On Edge-direction Feature
Tobing, Tabita; Skrabánek, Pavel; Yildirim-Yayilgan, Sule; George, Sony; Elgvin, Torleif (Journal article, 2023)Handwriting significantly contributes to the task of the writer identification and verification of modern and historical documents. This work developed a writer verification system for ancient Hebrew square-script manuscripts, ... -
Classification of forensic hyperspectral paper data using hybrid spectral similarity algorithms
D, Deepthi; Melit Devassy, Binu; George, Sony; Nussbaum, Peter; Tessamma, Thomas (Peer reviewed; Journal article, 2022)Document forgeries that involve modification of the materials used, such as ink and paper, provide evidence of any malpractices being performed. Forensic specialists use different techniques to identify and classify these ... -
Colour-Balanced Edge-Guided Digital Inpainting: Applications on Artworks
Ciortan, Irina-Mihaela; George, Sony; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2021)The virtual inpainting of artworks provides a nondestructive mode of hypothesis visualization, and it is especially attractive when physical restoration raises too many methodological and ethical concerns. At the same time, ... -
Comparison of Hyperspectral Imaging and Fiber-Optic Reflectance Spectroscopy for Reflectance and Transmittance Measurements of Colored Glass
Babini, Agnese; Green, Philip John; George, Sony; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2022)The work presented in this paper is part of a wider research project, which aims at documenting and analyzing stained glass windows by means of hyperspectral imaging. This technique shares some similarities with UV-VIS-IR ... -
Comparison of Imaging Models for Spectral Unmixing in Oil Painting
Grillini, Federico; Thomas, Jean Baptiste; George, Sony (Peer reviewed; Journal article, 2021)The radiation captured in spectral imaging depends on both the complex light–matter interaction and the integration of the radiant light by the imaging system. In order to obtain material-specific information, it is important ... -
Comparison of Ink Classification Capabilities of Classic Hyperspectral Similarity Features
Melit Devassy, Binu; George, Sony; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2019)Ink classification is an active topic in historic and forensic document analysis. In this work, we compared the ink classification capabilities of five commonly used and wellproven similarity measures for classification ... -
Comparison of Pigment Classification Algorithms on Non-Flat Surfaces using Hyperspectral Imaging
Mandal, Dipendra Jee; Pedersen, Marius; George, Sony; Boust, Clotilde (Peer reviewed; Journal article, 2023)Cultural heritage objects, such as paintings, provide valuable insights into the history and culture of human societies. Preserving these objects is of utmost importance, and developing new technologies for their analysis ... -
A Comprehensive Tensor Framework for the Clustering of Hyperspectral Paper Data with an Application to Forensic Document Analysis
Francis, Jobin; Madathil, Baburaj; George, Sudhish N; George, Sony (Peer reviewed; Journal article, 2021)In forensic document analysis, the authenticity of a document must be properly checked in the context of suspected forgery. Hyperspectral Imaging (HSI) is a non-invasive way of detecting fraudulent papers in a multipage ... -
Contactless Classification of Strawberry Using Hyperspectral Imaging
Melit Devassy, Binu; George, Sony (Peer reviewed; Journal article, 2020)Rapid non-contact estimation of fruit quality parameters is an essential factor for an efficient food processing pipeline. We propose a novel workflow for the contactless classification of strawberries based on their sugar ... -
Dimensionality reduction and visualisation of hyperspectral ink data using t-SNE
Melit Devassy, Binu; George, Sony (Peer reviewed; Journal article, 2020)Ink analysis is an important tool in forensic science and document analysis. Hyperspectral imaging (HSI) captures large number of narrowband images across the electromagnetic spectrum. HSI is one of the non-invasive tools ... -
Distributed Equipment Tracking in Unreliable Network Environments
Möckel, Johannes; Ruud, Ole Martin Ødevald; Strangstadstuen, Roald (Bachelor thesis, 2020)Sambandsseksjonen, G6, i Opplanske Heimevernsdistrikt skal til en hver tid ha kontroll over materiell og utstyr. De ønsker å anskaffe et digitalt system for å spore utstyret deres. Hovedutfordring er at systemet må settes ... -
Enhancing Chat Moderation with Soft Biometric Keystroke Dynamics
Milward, Joachim Olerud; Olsen, Nicolai Andre; Johansen, Vegard (Bachelor thesis, 2024)Å støtte chattemoderatorer ved å redusere arbeidsmengden deres når det gjelder å fjerne uønsket innhold og eliminere nettgrooming i spillsamfunn er et essentielt tiltak for å opprettholde brukervennlige og innbydende ...