Low-cost multispectral camera for applications in horti- and agriculture

Hedde van Hoorn; Hugo van Dam; Joshua Meijer; Roman Sillé; Arjan Lock; Steven van den Berg

doi:10.1117/12.2692910

13 March 2024 Low-cost multispectral camera for applications in horti- and agriculture

Hedde van Hoorn, Hugo van Dam, Joshua Meijer, Roman Sillé, Arjan Lock, Steven van den Berg

Proceedings Volume PC12879, Photonic Technologies in Plant and Agricultural Science; PC1287907 (2024) https://doi.org/10.1117/12.2692910
Event: SPIE LASE, 2024, San Francisco, California, United States

Conference Poster

Abstract

Spectral imaging is widely applied in pest detection and yield estimation in agri- and horticulture. Illumination based spectral imaging (instead of selection on the detector side) could provide a more cost-effective solution, potentially enabling applications for which current spectral imaging technology is too costly. In this contribution we present the development of a low-cost approach for quantitative spectral imaging, with spectral selection using LED-based illumination at various wavelengths. We used a Printed Circuit Board (PCB) approach with a motherboard, which is implemented as a Pi-Hat and controls the LEDs. The motherboard is connected to a donut-shaped PCB with eight surface mounted LEDs with spectra from 400 - 940 nm to select wavelengths. We use a monochrome Si-camera sensitive to all wavelengths, a light diffuser and a 3D printed holder. Using our setup, we register a multispectral image by successively switching LED illumination and grabbing frames. We validated the spectral imaging capability using conventional reflection spectroscopy and color tiles. We are currently investigating various applications of this compact, low-cost solution for spectral imaging.

Citation Download Citation

Hedde van Hoorn, Hugo van Dam, Joshua Meijer, Roman Sillé, Arjan Lock, and Steven van den Berg "Low-cost multispectral camera for applications in horti- and agriculture", Proc. SPIE PC12879, Photonic Technologies in Plant and Agricultural Science, PC1287907 (13 March 2024); https://doi.org/10.1117/12.2692910

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