The invention relates to the technical field of digital display, in particular to a national dance digital display
system which comprises a track node extraction module, a
rhythm segment optimization module, a trend stability recognition module, an action
information acquisition module and a synchronous recombination execution module. According to the method, angle abrupt
change points are extracted by constructing spatial vectors, action change recognition is enhanced, the
frame sequence structure analysis precision is improved, time length and amplitude dual stability standards are introduced in beat
paragraph screening, the accuracy and robustness of
rhythm recognition are enhanced, trend stable frames are extracted through slope fluctuation comparison, and the accuracy and robustness of
rhythm recognition are improved. The continuity of the rhythm flow direction and the centrality of node selection are ensured, the main limb movement is constructed by the path total distance, the
direction angle and the
frame time sequence, the clear structure and the consistent direction of the movement expression are ensured, the direction correction and rhythm scaling strategy is introduced in the dynamic recombination process, the smooth movement transition and the rhythm synchronization are ensured, and the reorganization efficiency is improved. And the rhythm coordination and the dynamic coherence of dance actions are obviously improved.