On Temporal Order Invariance for View-invariant Action Recognition
WANG Chuanxu
DENG Haigang
Abstract：The invariance property of temporal order of action instances is explored during action execution and it is uti‐lized for devising a new view‐invariant action recognition approach .To ensure temporal order during matching ,spatiotempo‐ral features ,feature fusion and temporal order consistency constraint are utilized .Start by extracting spatiotemporal cuboid features from video sequences and applying feature fusion based on PCA and LPP algorithm to encapsulate within‐class simi‐larity for the same viewpoints .For each action class ,a feature fusion table is constructed to facilitate feature matching across different views .An action matching score is then calculated based on global temporal order constraint and number of matc‐hing features .Finally ,the action label of the class with the maximum value of the matching score is assigned to the query ac‐tion .Experimentation is performed on multiple view Inria Xmas motion acquisition sequences and West Virginia University action datasets ,with encouraging results ,that are comparable to the existing view‐invariant action recognition techniques .
Keywords：action recognitionfeature fusionspace-time featuresview-invariance
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1794-1798 )