WEATHER DETECTOR, WEATHER DETECTION SYSTEM, AND WEATHER DETECTING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a weather detector, weather detection system and weather detecting method capable of quickly detecting meteorological states in a number of positions. SOLUTION: An image data obtained by photographing a snowing monitoring area is inputted (S10), and a two-dimensional discrete Fourier transform is performed for the image data (S12). The total sum of power spectra obtained by the two-dimensional discrete Fourier transform is calculated (S14), and the snowing state of the snowing monitoring area is judged on the basis of the value of the total sum of power spectra (S16).