Active and Passive Electro-Optical Sensors for Health Assessment in Food Crops

Sensors

Ian Goodwin¹  David William Lamb¹  Dario Stefanelli¹  Roberto Sabatini²  Hai Pham²  Alessandro Gardi²  Thomas Fahey² 

[1] Food Agility CRC Ltd., 81 Broadway, Melbourne, NSW 2007, Australia;School of Engineering, RMIT University, Melbourne, VIC 3000, Australia;

关键词: agriculture;    sensor;    electro-optics;    remote sensing;    fluorescence;    multispectral;   

DOI  :  10.3390/s21010171

来源: DOAJ

【 摘 要 】

In agriculture, early detection of plant stresses is advantageous in preventing crop yield losses. Remote sensors are increasingly being utilized for crop health monitoring, offering non-destructive, spatialized detection and the quantification of plant diseases at various levels of measurement. Advances in sensor technologies have promoted the development of novel techniques for precision agriculture. As in situ techniques are surpassed by multispectral imaging, refinement of hyperspectral imaging and the promising emergence of light detection and ranging (LIDAR), remote sensing will define the future of biotic and abiotic plant stress detection, crop yield estimation and product quality. The added value of LIDAR-based systems stems from their greater flexibility in capturing data, high rate of data delivery and suitability for a high level of automation while overcoming the shortcomings of passive systems limited by atmospheric conditions, changes in light, viewing angle and canopy structure. In particular, a multi-sensor systems approach and associated data fusion techniques (i.e., blending LIDAR with existing electro-optical sensors) offer increased accuracy in plant disease detection by focusing on traditional optimal estimation and the adoption of artificial intelligence techniques for spatially and temporally distributed big data. When applied across different platforms (handheld, ground-based, airborne, ground/aerial robotic vehicles or satellites), these electro-optical sensors offer new avenues to predict and react to plant stress and disease. This review examines the key sensor characteristics, platform integration options and data analysis techniques recently proposed in the field of precision agriculture and highlights the key challenges and benefits of each concept towards informing future research in this very important and rapidly growing field.

【 授权许可】

Unknown