Browsing Institutt for elektroniske systemer by Journals "Proceedings of SPIE, the International Society for Optical Engineering"
Now showing items 1-15 of 15
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A random forest-based method for selection of regions of interest in hyperspectral images of ex vivo human skin
(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
(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 ... -
Classification of municipal solid waste using deep convolutional neural network model applied to multispectral images
(Peer reviewed; Journal article, 2021)Minimization of the environmental impact of the incineration process and to produce energy efficiently are the most important considerations in obtaining efficient operation of waste-to-energy (WtE) plants. WtE operation ... -
Combined 3D model acquisition and autofocus tracking system for hyperspectral line-scanning devices
(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 ... -
Feasibility of supercontinuum sources for use in glucose sensing by absorption spectroscopy
(Journal article; Peer reviewed, 2019)Diabetes mellitus 1 requires tight control of the blood glucose levels to avoid harmful effects of either too high (hyperglycemia) or too low (hypoglycemia) blood sugar. Due to the availability of low-cost components, ... -
First step towards an interferometric and localized surface plasmon fiber optic sensor
(Journal article; Peer reviewed, 2017)We present a first demonstration of a novel multi-parameter fiber optic (FO) sensor concept based on gold nanoparticles (GNP) embedded in a stimuli-responsive hydrogel material. A hemispherical hydrogel immobilized on the ... -
Hyperspectral characterization of an in vitro wound model
(Journal article; Peer reviewed, 2014)Wound healing is a complex process not fully understood. There is a need of better methods to evaluate the different stages of healing, and optical characterization is a promising tool in this respect. In this study ... -
Hyperspectral characterization of tissue in the SWIR spectral range: a road to new insight?
(Journal article; Peer reviewed, 2019)Hyperspectral imaging is a generic imaging modality allowing high spectral and spatial resolution over a wide wavelength range from the visible to mid-infrared. Short wavelength infrared (SWIR) hyperspectral imaging is ... -
Interferometric and localized surface plasmon based fiber optic sensor
(Journal article; Peer reviewed, 2017)We demonstrate a novel single point, multi-parameter, fiber optic sensor concept based on a combination of interferometric and plasmonic sensor modalities on an optical fiber end face. The sensor consists of a microFabry-Perot ... -
Mid-infrared spectroscopy with a fiber-coupled tuneable quantum cascade laser for glucose sensing
(Peer reviewed; Journal article, 2020)A fiber-coupled transmission spectroscopy setup using a pulsed external-cavity quantum cascade laser (EC-QCL, 1200-900 cm−1 ) has been developed and demonstrated for measurements of aqueous solutions. The system has been ... -
Novel localized surface plasmon resonance based optical fiber sensor
(Journal article; Peer reviewed, 2016)Over the last decade various optical fiber sensing schemes have been proposed based on local surface plasmon resonance (LSPR). LSPR are interacting with the evanescent field from light propagating in the fiber core or by ... -
Pushing the limits of beam-steering lens arrays
(Journal article; Peer reviewed, 2019)An essential part of a concentrated solar power system is the solar tracker. Tracking is usually implemented by rotating the entire optical system to follow the sun, adding to the bulk and complexity of the system. ... -
Signal enhancement in microstructured silicon attenuated total reflection elements with quantum cascade laser-based spectroscopy
(Peer reviewed; Journal article, 2020)Sensors in mid-infrared spectroscopy based on attenuated total reflection (ATR) sensing with internal reflection elements (IREs) facilitate easier measurements of aqueous solutions or other opaque analytes. Micromachined ... -
The effect of dimensionality reduction on signature-based target detection for hyperspectral imaging
(Journal article; Peer reviewed, 2019)Target detection is one of the more popular applications of hyperspectral remote sensing. To enhance the detection rate, it is common to do preprocessing to reduce the effects of noise and other forms of undesired interference ... -
Vessel contrast enhancement in hyperspectral images
(Journal article; Peer reviewed, 2015)Imaging of vessel structures can be useful for investigation of endothelial function, angiogenesis and hyper-vascularization. This can be challenging for hyperspectral tissue imaging due to photon scattering and absorption ...