| abstract |
The invention discloses a method and a system for monitoring the spatial dynamic distribution of crop diseases and insect pests, belonging to the technical field of crop disease and insect pest monitoring. The continuous multispectral images are spliced, radiation corrected and de-noised respectively to obtain the surface reflectance image map of the area to be monitored; the surface reflectance normalized vegetation index NDVI is calculated according to the obtained surface reflectance image map of the area to be monitored. . The invention obtains a plurality of continuous multi-spectral images of the area to be monitored through a multi-spectral camera, and then performs splicing, radiation correction and denoising processing respectively, and finally obtains the surface reflectance normalized vegetation index NDVI, which has high judgment efficiency and high accuracy. . |