Browsing NTNU Open by Author "Farup, Ivar"
Now showing items 1-20 of 79
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3D reconstruction of gastrointestinal regions using shape-from-focus
Ahmad, Bilal; Farup, Ivar; Floor, Pål Anders (Peer reviewed; Journal article, 2023)3D shape reconstruction from images is an active topic in computer vision. Shape-from-Focus (SFF) is an important approach which requires image stack in a focus controlled manner to infer the 3D shape. In this article, 3D ... -
3D Reconstruction of Gastrointestinal Regions Using Single-View Methods
Ahmad, Bilal; Floor, Pål Anders; Farup, Ivar; Hovde, Øistein (Peer reviewed; Journal article, 2023)Capsule endoscopy is about to become an alternative to traditional colonoscopy. One uses a wireless camera to visualize the gastrointestinal (GI) tract. A 3D model based on image sequences obtained from wireless capsule ... -
3D Reconstruction of GI Regions from Single Images
Ahmad, Bilal; Floor, Pål Anders; Farup, Ivar; Kresović, Milan (Peer reviewed; Journal article, 2022)3D shape reconstruction from images is one of the problem under investigation in the field of computer vision. Shape-from-shading (SfS) is an important approach which requires the reflectance properties of surface and light ... -
3D Reconstruction of the Human Colon from Capsule Endoscope Video
Floor, Pål Anders; Farup, Ivar; Pedersen, Marius (Peer reviewed; Journal article, 2022)In this paper we investigate the possibility of constructing 3D models of longer sections of the human colon using image sequences obtained from wireless capsule endoscope (WCE) video to provide enhanced viewing for ... -
3D Shape Reconstruction from Capsule Endoscopy Video
Ahmad, Bilal (Doctoral theses at NTNU;2024:125, Doctoral thesis, 2024)Wireless Capsule Endoscopy (WCE) has revolutionized the field of gastroenterology by providing an alternative to traditional endoscopy, as it is less invasive and requires no sedation. It is a patient-friendly procedure ... -
A Computational Framework for Colour Metrics and Colour Space Transforms
Farup, Ivar (Journal article; Peer reviewed, 2016)An object-oriented computational framework for the transformation of colour data and colour metric tensors is presented. The main idea of the design is to represent the transforms between spaces as compositions of objects ... -
A Virtual Reality Clinical Education Tool for Medical Students in Norway
Helgestad, Amund; Rønning, Kristian Aakervik; Lien, Thomas Vincent (Bachelor thesis, 2022)Medisinsk utdanning i Norge står for tiden ovenfor en utfordring; det er et ønske å kunne øke antallet studentplasser, men muligheten for dette er begrenset av tilbudet til å gi praktisk klinikkundervisning. Zimmer Digital ... -
Additivity Constrained Linearisation of Camera Calibration Data
Andersen, Casper Find; Farup, Ivar; Hardeberg, Jon Yngve (Peer reviewed; Journal article, 2023)When characterising a digital camera spectrally or colourimetrically, the camera response to a generally diffusely reflecting colour chart is often employed. The recorded responses to the light incident from each colour ... -
Administrasjonssystem for datavitenskapsoppgaver
Aanesen, Johan; Klausen, Brede Fritjof; Danielsen, Svein Are (Bachelor thesis, 2019)Prosjektets mål har vært å lage et web basert system som simplifiserer oppgave innlevering og gjennomgang av andre sine oppgaver, dette erstatter den tidligere brukte organiseringen gjennom regneark. Gjennom bacheloren har ... -
Administrasjonssystem for datavitenskapsoppgaver
Aanesen, Johan; Klausen, Brede Fritjof; Danielsen, Svein Are (Bachelor thesis, 2019)Prosjektets mål har vært å lage et web basert system som simplifiserer oppgave innlevering og gjennomgang av andre sine oppgaver, dette erstatter den tidligere brukte organiseringen gjennom regneark. Gjennom bacheloren har ... -
ADS-B - Reception, Processing and Display
Malde, Andreas Follevaag; Sundt-Hansen, Fredrik (Bachelor thesis, 2024)Electronic Chart Centre (ECC) er et selskap som driver med utvikling og vedlikehold av digitale kartløsninger i samarbeid med blant annet Kartverket. Selskapet ønsker å vise mer informasjon i kartapplikasjonene sine, som ... -
An Evaluation of Colour-to-Greyscale Image Conversion by Linear Anisotropic Diffusion and Manual Colour Grading
Barba, Aldo; Farup, Ivar; Pedersen, Marius (Journal article; Peer reviewed, 2019)In the paper "Colour-to-Greyscale Image Conversion by Linear Anisotropic Diffusion of Perceptual Colour Metrics", Farup et al. presented an algorithm to convert colour images to greyscale. The algorithm produces greyscale ... -
Anisotropic Diffusion for Depth Estimation in Shape from Focus Systems
Ahmad, Bilal; Farup, Ivar; Floor, Pål Anders (Chapter, 2024)Shape from focus is a monocular method that uses the camera’s focus as the primary indicator for depth estimation. The initial depth map is usually improved by penalizing the L2 regularizer as a smoothness constraint, which ... -
Appitude
Holden, Bent (Bachelor thesis, 2018)Denne oppgaven vil ta for seg utviklingen av en smarttelefon applikasjon. Applikasjonen sitt formål er å kunne se nærmere på bruk av eksterne sensorer til å måle og utlede statistiske verdier, fra en spesiell skiteknikk ... -
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 ... -
Automatic EX-Inspection
Stordal, Cim (Bachelor thesis, 2018)Faulty electrical cables pose a signi cant and severe risk to both people and equipment, especially on oil rigs where electrical cables and highly combustible gases are separated by thin barriers. This thesis describes an ... -
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, ... -
Bio-Inspired Multimodal Imaging in Reduced Visibility
Lapray, Pierre-Jean; Thomas, Jean Baptiste; Farup, Ivar (Journal article; Peer reviewed, 2022) -
Colour-to-greyscale image conversion by linear anisotropic diffusion of perceptual colour metrics
Farup, Ivar; Pedersen, Marius; Alsam, Ali (Chapter, 2018)We present an algorithm for conversion of colour images to greyscale. The underlying idea is that local perceptual colour differences in the colour image should translate into local differences in greylevel in the greyscale ... -
A Comparison of Regularization Methods for Near-Light-Source Perspective Shape-from-Shading
Ahmad, Bilal; Floor, Pål Anders; Farup, Ivar (Peer reviewed; Journal article, 2022)3D shape reconstruction from images is an active topic in computer vision. Shape-from-Shading is an important approach which requires the surface properties and light source position to infer the 3D shape. A L2 regularizer ...