Field wave height and period measurement method, device and system and medium

The invention relates to a field wave height and period measurement method, device and system and a medium. The method comprises the following steps: S1, acquiring a wave video of a monitoring field; s2, reading a frame of video frame image from the wave video in sequence and processing the video frame image to obtain a height value of the video frame image; s3, calculating an average value of the height values of the plurality of video frame images to obtain an average height value; s4, for each video frame image, calculating a height difference value between the height value of the video frame image and the average height value to obtain a wave surface elevation corresponding to the video frame image; s5, obtaining a plurality of upper cross zero points and lower cross zero points according to the wave surface elevations corresponding to the plurality of video frame images, and calculating a wave period by two adjacent upper cross zero points or two adjacent lower cross zero points; and S6, for each wave pe