The application provides a beat recognition method and device for a deformable object in a video
stream, which does not perform target recognition on images in the video
stream, but recognizes time frequencies of regular movements in the video
stream, thereby efficiently extracting periodic changes in time frequencies of specific signals from the video stream. The beat recognition method for the deformable object in the video stream comprises the following steps: step 1, extracting matched feature points in adjacent two frames of the video stream by using a
local matching and global
screening method, and recursively calculating the feature points with consistency in each frame of pictures based on the matched feature points; step 2, performing motion
statistical analysis on the feature points in multiple frames of pictures, and classifying the feature points into two categories, one category is background feature points with a significant similar movement rule, and the other category is deformable object feature points with a
significant difference from the first category; and step 3, analyzing and recognizing periodic rules and quantitative beats from the movement rule of the deformable object feature points.