# Supplemental Blue LED Lighting Array to Improve the Signal Quality in Hyperspectral Imaging of Plants

## TL;DR

Adding blue LED lights improves the quality of hyperspectral images of plants by boosting signal strength in the blue spectrum range.

## Contribution

A novel use of 470 nm blue LEDs to enhance hyperspectral imaging signal quality in the blue region for plant analysis.

## Key findings

- Supplemental blue LED lighting significantly improves signal quality in the 400–500 nm range.
- The LED array increases the signal-to-noise ratio in hyperspectral imaging systems for plant studies.

## Abstract

Hyperspectral imaging systems used in plant science or agriculture often have suboptimal signal-to-noise ratio in the blue region (400–500 nm) of the electromagnetic spectrum. Typically there are two principal reasons for this effect, the low sensitivity of the imaging sensor and the low amount of light available from the illuminating source. In plant science, the blue region contains relevant information about the physiology and the health status of a plant. We report on the improvement in sensitivity of a hyperspectral imaging system in the blue region of the spectrum by using supplemental illumination provided by an array of high brightness light emitting diodes (LEDs) with an emission peak at 470 nm.