With remote sensing we refer to the acquisition of information about something without physically contacting with it. This technique is commonly used in various areas: forestry, agriculture and environmental applications such as desertification, soil erosion and water quality. Remote sensing has proved very useful in the field of agriculture by providing accurate information about the physiological state of the plants and water stress information.
For this purpose thermal cameras and multi / hyper-spectral used, acquiring spectral information in the visible and near infrared ranges. By combining information from different spectral bands, the user is able to gain valuable information about the status and plant water stress by using indicators such as the Normalized Difference Vegetation Index NDVI, Photochemical Reflectance Index (PRI), chlorophyll indexes and indicators of water stress.