Characterization of a Multispectral Imaging System Based on Narrow Bandwidth Power LEDs
Multispectral imaging systems using narrow-band power LEDs have become a feasible solution for a wide range of applications. Their fast response and simple implementation compensate for a low spectral resolution. In this article, we are filling a gap identified in the literature on multispectral sys...
| Autores principales: | , , , , , |
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| Formato: | article |
| Lenguaje: | Inglés |
| Publicado: |
IEEE Standards Association
2021
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.11939/7084 https://ieeexplore.ieee.org/abstract/document/9143139 |
| Sumario: | Multispectral imaging systems using narrow-band power LEDs have become a feasible solution for a wide range of applications. Their fast response and simple implementation compensate for a low spectral resolution. In this article, we are filling a gap identified in the literature on multispectral systems by presenting a detailed design of a light controller, as well as a characterization of the whole system by means of a correlation and a repeatability analysis. We use a reference color target to assess accuracy and precision by comparing our system with high-performance hyperspectral equipment used in fruit quality control. The system captures multispectral images (MSIs) with 15 different wavelengths (λ ∈ [410 950] nm). The main finding is a Pearson correlation index above 80% (ρ > 0.8) with a variance in the measure within 10% (σ 2 <; 0.1). We also examine the characteristics of the instrument at a maximum speed of 8 MSIs/s although this entails sacrificing precision (σ 2 <; 0.3). |
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