Hyperspectral reflectance system for plant diagnostics

The article presents a hyperspectral reflectance system. The spectral range of the system varies from 480 to 900 nm with a spectral resolution of approximately 5 nm and a spatial resolution of at least 0.1 mm. The developed system is able to measure the reflectivity of objects, resulting in a two-dimensional image with full spectral information in each pixel ("hypercube"). The article describes the procedure for image calibration and correction with respect to system artifacts caused by optics and lighting conditions across the entire spectrum. The operation of the hyperspectral imaging system was demonstrated on the samples of the Siberian 12 wheat leaves, healthy and affected by powdery mildew (Blumeria graminis (DC) Speer). The proposed use of the hyperspectral reflectance system is to conduct research in early detection and localization of agricultural plants lesions.