LED for hyperspectral imaging – a new selection method
-
Tobias Heimpold
,
Stefan Drechsel
Abstract
Hyperspectral imaging (HSI) has become a sophisticated technique in modern applications such as food analyses, recycling technology, medicine, pharmacy and forensic science. It allows one to analyse both spatial and spectral information from an object. But hyperspectral cameras are still expensive due to their extended wavelength range. The development of new light-emitting diodes (LED) in the recent past enables another approach to HSI using a monochrome camera in combination with a LED-based illumination. However, such a system has a lower spectral resolution. Additionally, the growing supply of LED on the market complicates the selection of LED. In this paper, we propose a new time efficient selection method for the design process of an illumination. It chooses an optimised LED combination from an existing database to match a predefined spectral power distribution. Therefore, an algorithm is used to evaluate various LED combinations. Furthermore, the method considers the spectral behaviour of each LED in dependence of forward current and temperature of the solder point. Our method has already shown promise during the selection process for even spectral distributions which is demonstrated in the study. Additionally, we will show its potential for HSI illuminations.
Author Statement
Research funding: Authors state no funding involved.
Conflict of interest: Authors state no conflict of interest.
Informed consent: Informed consent is not applicable.
Ethical approval: The conducted research is not related to either human or animals use.
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©2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Guest Editorial
- Optical imaging methods in medicine: how can we escape the plausibility trap?
- Special Issue Articles
- Diffuse near-infrared imaging of tissue with picosecond time resolution
- A compact hyperspectral camera for measurement of perfusion parameters in medicine
- LED for hyperspectral imaging – a new selection method
- Approaches for calibration and validation of near-infrared optical methods for oxygenation monitoring
- Hyperspectral imaging in perfusion and wound diagnostics – methods and algorithms for the determination of tissue parameters
- Algorithms for mapping kidney tissue oxygenation during normothermic machine perfusion using hyperspectral imaging
- Intraoperative mapping of the sensory cortex by time-resolved thermal imaging
- Intraoperative motion correction in neurosurgery: a comparison of intensity- and feature-based methods
- Optical molecular imaging of corpora amylacea in human brain tissue
- Intraoperative optical imaging of metabolic changes after direct cortical stimulation – a clinical tool for guidance during tumor resection?
- Application of optical and spectroscopic technologies for the characterization of carious lesions in vitro
- Hyperspectral imaging: innovative diagnostics to visualize hemodynamic effects of cold plasma in wound therapy
- Hyperspectral imaging as a possible tool for visualization of changes in hemoglobin oxygenation in patients with deficient hemodynamics – proof of concept
- Cardiovascular assessment by imaging photoplethysmography – a review
Articles in the same Issue
- Frontmatter
- Guest Editorial
- Optical imaging methods in medicine: how can we escape the plausibility trap?
- Special Issue Articles
- Diffuse near-infrared imaging of tissue with picosecond time resolution
- A compact hyperspectral camera for measurement of perfusion parameters in medicine
- LED for hyperspectral imaging – a new selection method
- Approaches for calibration and validation of near-infrared optical methods for oxygenation monitoring
- Hyperspectral imaging in perfusion and wound diagnostics – methods and algorithms for the determination of tissue parameters
- Algorithms for mapping kidney tissue oxygenation during normothermic machine perfusion using hyperspectral imaging
- Intraoperative mapping of the sensory cortex by time-resolved thermal imaging
- Intraoperative motion correction in neurosurgery: a comparison of intensity- and feature-based methods
- Optical molecular imaging of corpora amylacea in human brain tissue
- Intraoperative optical imaging of metabolic changes after direct cortical stimulation – a clinical tool for guidance during tumor resection?
- Application of optical and spectroscopic technologies for the characterization of carious lesions in vitro
- Hyperspectral imaging: innovative diagnostics to visualize hemodynamic effects of cold plasma in wound therapy
- Hyperspectral imaging as a possible tool for visualization of changes in hemoglobin oxygenation in patients with deficient hemodynamics – proof of concept
- Cardiovascular assessment by imaging photoplethysmography – a review
