Abstract
Plants can change their growth conditions due to external factors. In the management of crop cultivation, it is important to assess the growth conditions without harvesting the crops to minimize the reduction in productivity. In this study, we propose a method to assess the growth conditions of grapes based on different cultivation methods using hyperspectral imaging. By using a hyperspectral camera, It is possible to detect changes that are difficult to capture with a visible light camera.Specifically, we focused on vineyards with and without the installation of multi-sheet systems as a difference in cultivation methods. We captured images using a hyperspectral camera and calculated the Normalized Difference Vegetation Index (NDVI) from the captured images. By analyzing the temporal changes in NDVI, we evaluated the growth conditions.The results of the experiment suggested that by comparing the NDVI values after correcting for the effects of factors such as solar azimuth, angle, and imaging equipment, we can grasp the differences in growth conditions such as internal water content and sugar content in plants based on the presence or absence of mulch-sheet systems. Furthermore, the observation of NDVI indicated the potential for estimating Brix values.
