... A-MKL_4, whichdemonstrates that the information from other event classesDUAN ET AL.: VISUAL EVENT RECOGNITION IN VIDEOS BY LEARNING FROM WEB DATA 1677TABLE 4Means and Standard Deviations (Percent) ... (respectively, ST features) occupy 41.7 megabytes(respectively, 17.9 megabytes) on average. In this work,each type of features is vector-quantized into visual words by using k-means. Considering the ... 2012Visual Event Recognition in Videos by Learning from Web Data Lixin Duan, Dong Xu, Member, IEEE, Ivor Wai-Hung Tsang, andJiebo Luo, Fellow, IEEEAbstract—We propose a visual event recognition...