A Tensor Based on Optical Flow for Global Description of Motion in Videos
Virgínia Fernandes Mota, Eder de Almeida Perez, Marcelo Bernardes Vieira, Luiz Maurílio da Silva Maciel, Fŕed́eric Precioso, Philippe-Henri Gosselin · 2012
Motion is one of the main characteristics that describe the semantic information of videos. In this work, a global video descriptor based on orientation tensors is proposed. This descriptor is obtained by combining polynomial coefficients calculated for each image in a video. The coefficients are found through the projection of the optical flow on Legendre polynomials, reducing the dimension of per frame motion estimations. The sequence of coefficients are then combined using orientation tensors. The global tensor descriptor created is evaluated by a classification of the KTH video database with a SVM classifier.