Method, device and system for identifying field wave height and period based on video, and medium

The invention relates to a method, a device and a system for identifying field wave height and period based on a video, and a medium. The method comprises the following steps: S1, acquiring a wave video of a monitoring field through monitoring equipment; s2, sequentially selecting a frame of video frame image from the wave video and processing the video frame image to obtain a height value of a wave surface corresponding to the shooting time of the video frame image; s3, calculating an average height value of the height values corresponding to the plurality of shooting times; s4, calculating a height difference value between the height value of the wave surface corresponding to each shooting time and the average height value to obtain a wave surface elevation corresponding to the shooting time; s5, obtaining a plurality of upper-span zero points and a plurality of lower-span zero points according to the wave surface elevations corresponding to the plurality of shooting times, and then calculating a wave perio