Blar i NTNU Open på forfatter "Randeberg, Lise Lyngsnes"
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3D-overflatemodellering basert på stereoskopiske bilder
Røren, Thomas Thorsen (Master thesis, 2012)Prosjektet har omhandlet utvikling av en prototype 3D-modell som er basert på stereoskopiske bilder. Hensikten er å modellere kroniske hudsår for visualisering og dybdeestimering av sårene. Modelleringen vil kunne brukes ... -
A Hyperspectral Imaging System using an Acousto-Optic Tunable Filter - Constructing and evaluating the hyperspectral imaging system
Baranda Castrillo, Alejandro (Master thesis, 2015)The aim of this work was to built a high performance hyperspectral imaging system, a state-ofthe- art technology with applications among many fields, like medicine. Chapter 1 introduces this technology and its benefits. ... -
A Priori Spectroscopy of Coffee Roasts
Solberg, Erling (Master thesis, 2021)Før brygging må kaffe brennes. Kaffebrennere ønsker så mye kontroll over brenneprosessen som mulig. I dag er kaffebrenning for det meste manuelt arbeid med lite eller ingen instrumentering. Kjemisk sammensetning er viktig ... -
A random forest-based method for selection of regions of interest in hyperspectral images of ex vivo human skin
Bjorgan, Asgeir; Randeberg, Lise Lyngsnes (Journal article; Peer reviewed, 2019)Hyperspectral imaging is a useful tool for characterization of human tissue. However, the vast amount of data created makes it challenging and tedious to manually select spatial regions of interest for further processing. ... -
Application of smoothing splines for spectroscopic analysis in hyperspectral images
Bjorgan, Asgeir; Randeberg, Lise Lyngsnes (Journal article; Peer reviewed, 2019)The spectral and spatial resolution of hyperspectral imaging is useful for investigation of tissue autofluorescence. The low-light, noisy conditions in fluorescence imaging usually necessitates noise removal for extraction ... -
Area and Severity Estimation of Psoriasis
Myklebust, Adrian Isak (Master thesis, 2020)Psoriasis er en verdensomspennende sykdom som fører til utslett på ulike deler av kroppen. Den varierer i alvorlighetsgrad fra mild til alvorlig, og har negativ påvirkning på de berørte menneskenes livskvalitet. Årsaken ... -
Bilirubin estimates from smartphone images of newborn infants’ skin correlated highly to serum bilirubin levels
Aune, Anders; Vartdal, Gunnar; Bergseng, Håkon; Randeberg, Lise Lyngsnes; Darj, Elisabeth (Peer reviewed; Journal article, 2020)Aim Neonatal jaundice is an important cause of morbidity and mortality, and identifying the condition remains a challenge. This study evaluated a novel method of estimating bilirubin levels from colour‐calibrated ... -
Can hyperspectral imaging be used to map corrosion products on outdoor bronze sculptures?
Catelli, Emilio; Randeberg, Lise Lyngsnes; Strandberg, Helena; Alsberg, Bjørn Kåre; Maris, Assimo; Vikki, Lily (Journal article; Peer reviewed, 2018)The application of hyperspectral imaging in the field of cultural heritage investigation is growing rapidly. In this study, short wavelength infrared hyperspectral imaging (960–2500 nm) has been explored as a potential ... -
Can spectral-spatial image segmentation be used to discriminate experimental burn wounds?
Paluchowski, Lukasz A.; Nordgaard, Håvard B.; Bjorgan, Asgeir; Hov, Håkon; Berget, Sissel Marie; Randeberg, Lise Lyngsnes (Journal article; Peer reviewed, 2016)Hyperspectral imaging (HSI) is a noncontact and noninvasive optical modality emerging the field of medical research. The goal of this study was to determine the ability of HSI and image segmentation to discriminate burn ... -
Characterization of biological tissue using statistical and physics-based hyperspectral image processing methods
Paluchowski, Łukasz Andrzej (Doctoral theses at NTNU;2018:402, Doctoral thesis, 2018) -
Combined 3D model acquisition and autofocus tracking system for hyperspectral line-scanning devices
Bjorgan, Asgeir; Lukasz, Paluchowski; Seljebotn, Svein Tore Koksrud; Randeberg, Lise Lyngsnes (Journal article; Peer reviewed, 2019)Obtaining a sharp and focused image is essential to fully utilize the advantages of hyperspectral imaging. For line scanning hyperspectral devices, focusing is a challenge in applications where the height and/or position ... -
Continuous Autofocus for Line Scanning Hyperspectral Camera
Seljebotn, Svein Tore (Master thesis, 2012)Good focus quality is essential in imaging applications. For a hyperspectral line scanning camera, lack of continuous autofocus will quickly make the image become out of focus, given curved or sloped objects. In spite of ... -
Data for characterization of the optical properties of Atlantic salmon (Salmo salar) blood
Svendsen, Eirik; Randeberg, Lise Lyngsnes; Føre, Martin; Finstad, Bengt; Olsen, Rolf-Erik; Bloecher, Nina; Alfredsen, Jo Arve (Peer reviewed; Journal article, 2023)Photoplethysmography is a recent addition to physio-logging in Atlantic salmon which can be used for pulse oximetry provided that the properties for light propagation in salmon tissues are known. In this work, optical ... -
Deblurring hyperspectral images of structures embedded in turbid media
Tenstad, Torstein (Master thesis, 2022)Spredning av lys er en utfordring ved hyperspektral avbildning av strukturer i turbide medium: Bildene blir uskarpe, og kan modelleres som en konvulsjon mellom et ideelt, klart bilde og en punkspredefunksjon. Metoder for ... -
Design of a novel biosensor implant for farmed Atlantic salmon (Salmo salar)
Svendsen, Eirik; Føre, Martin; Randeberg, Lise Lyngsnes; Alfredsen, Jo Arve (Chapter, 2021)Accessing the welfare status of animals in salmon farming is a challenge due to the large production scale and limited diversity of technologies available to quantify individuals’ behavioural and physiological parameters. ... -
Development of a Smartphone-based diagnostic Tool for Jaundice
Vartdal, Gunnar (Master thesis, 2014)Jaundice is the cause of an estimated 114,100 deaths among newborn annually. Most of these deaths occur in the poorest regions of the world where current diagnostic technologies are too expensive. In this thesis, several ... -
Diagnostic applications of diffuse reflectance spectroscopy
Randeberg, Lise Lyngsnes (Doktoravhandlinger ved NTNU, 1503-8181; 2005:100, Doctoral thesis, 2005)This thesis covers a wide field of applications, with an emphasis on applications of reflectance spectroscopy for diagnostic purposes. Reflectance spectroscopy in the visible part of the spectrum has been proved to be a ... -
Documenting skin bruises with smartphone imaging
Zimmermann, Pauline Hardeberg (Master thesis, 2021)Målet med denne oppgaven er å utvikle og teste en standardisert metode for dokumentasjon av blåmerker. En slik metode kan bidra til å forbedre rettsmedisinsk bevis i rettsaker som omhandler vold og kan bistå helsepersonell ... -
ECG augmented pulse oximetry in Atlantic salmon (Salmo salar)—A pilot study
Svendsen, Eirik; Føre, Martin; Randeberg, Lise Lyngsnes; Olsen, Rolf-Erik; Finstad, Bengt; Remen, Mette; Bloecher, Nina; Alfredsen, Jo Arve (Peer reviewed; Journal article, 2023)Understanding the tolerance limits of fish is crucial for developing aquaculture operations that ensure good animal welfare. However, there exist little data describing the physiological responses in farmed Atlantic salmon, ... -
Estimation of skin optical parameters for real-time hyperspectral imaging applications
Bjorgan, Asgeir; Milanic, Matija; Randeberg, Lise Lyngsnes (Journal article; Peer reviewed, 2014)Hyperspectral imaging combines high spectral and spatial resolution in one modality. This imaging technique is a promising tool for objective medical diagnostics. However, to be attractive in a clinical setting, the technique ...