Category definition and machine recognition results on CCV database, including the best AP performance (in parenthesis),
precision-recall curves, and frames from top 8 videos in the test set (based on all the three features;
ordered from left to right, and top to bottom). We see significant improvements resulting from the fusion of
multiple features, which achieves the best performance for all the categories. Top-ranked
videos in the test set are mostly correct; false positives are marked using dashed bounding boxes.
Discernible faces are masked here due to privacy concern.