Blar i NTNU Open på forfatter "Floor, Pål Anders"
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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 ... -
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 ... -
Communication Aspects for a Measurement Based UWB in-Body to on-Body Channel
Floor, Pål Anders; Chavez-Santiago, Raul; Kim, Anna N.; Kansanen, Kimmo; Ramstad, Tor Audun; Balasingham, Ilangko (Journal article; Peer reviewed, 2019)A wireless capsule endoscopy (WCE) is a good option for the screening of the digestive system. To better facilitate detection of diseases at an early stage, gastroenterologists seek both higher frame rate and frame resolution ... -
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 ... -
Digitalt filter
Berge, Even; Floor, Pål Anders (Bachelor thesis, 2001)Oppgaven går i hovedsak ut på å simulere og vurdere ulike filterstrukturer for en DVB prosessor, og komme med en konklusjon på den best egnede strukturen.Utviklingsverktøyet QuartusII skal i tillegg testes for å se om ... -
Error reduction through post processing for wireless capsule endoscope video
Floor, Pål Anders; Farup, Ivar; Pedersen, Marius; Hovde, Øistein (Peer reviewed; Journal article, 2020)The wireless capsule endoscope (WCE) is a pill-sized device taking images, which are transmitting to an on-body receiver, while traveling through the digestive system. Since image data is transmitted through the human body, ... -
In-Body to On-Body Ultra WidebandPropagation Model Derived from Measurementsin Living Animals
Floor, Pål Anders; Chavez-Santiago, Raul; Brovoll, Sverre; Aardal, Øyvind; Bergsland, Jacob; Grymyr, Ole-Johannes; Halvorsen, Per Steinar; Palomar, Rafael; Plettemeier, Dirk; Hamran, Svein-Erik; Ramstad, Tor Audun; Balasingham, Ilangko (Journal article; Peer reviewed, 2015)Ultra wideband (UWB) radio technology for wireless implants has gained significant attention. UWB enables the fabrication of faster and smaller transceivers with ultra low power consumption, which may be integrated into ... -
Localization and Tracking of Intestinal Paths for Wireless Capsule Endoscopy
Bjørnevik, Anders Sandrib (Master thesis, 2015)Wireless capsule endoscopy (WCE) is a non-invasive technology used for visual inspection of the human gastrointestinal (GI) tract. Localization of the capsule is a vital component of the system, as this enables physicians ... -
On Path Length Estimation for Wireless Capsule Endoscopy
Bjørnevik, Anders; Floor, Pål Anders; Balasingham, Ilangko (Chapter, 2018)Wireless capsule endoscopy (WCE) is a non-invasive technology used for inspection of the gastrointestinal tract. Localization of the capsule is a vital part of the system enabling physicians to identify the position of ... -
On the Theory of Shannon-Kotel'nikov Mappings in Joint Source-Channel Coding
Floor, Pål Anders (Doctoral Theses at NTNU, 1503-8181; 185, Doctoral thesis, 2008)In this thesis an approach to joint source-channel coding using direct source to channel mappings is studied. The system studied communicates i.i.d. Gaussian sources on a point-to-point Gaussian memoryless channel with ... -
Single-Image-Based 3D Reconstruction of Endoscopic Images
Ahmad, Bilal; Floor, Pål Anders; Farup, Ivar; Andersen, Casper Find (Journal article; Peer reviewed, 2024)A wireless capsule endoscope (WCE) is a medical device designed for the examination of the human gastrointestinal (GI) tract. Three-dimensional models based on WCE images can assist in diagnostics by effectively detecting ... -
Zero Delay Joint Source Channel Coding for Multivariate Gaussian Sources over Orthogonal Gaussian Channels
Floor, Pål Anders; Kim, Anna N.; Ramstad, Tor Audun; Balasingham, Ilangko (Journal article; Peer reviewed, 2013-05-31)Communication of a multivariate Gaussian source transmitted over orthogonal additive white Gaussian noise channels using delay-free joint source channel codes (JSCC) is studied in this paper. Two scenarios are considered: ...