Multimedia Event Detection and Recounting (MED and MER)

This paper presents an overview and comparative analysis of our systems designed for TRECVID 2014 [1] multimedia event detection (MED) and recounting (MER) tasks, including all sub-tasks for Pre-Specified (PS) event detection, all sub-tasks except 100Ex for Ad-Hoc (AH) event detection, and 010Ex sub-task for both PS and AH event recounting. Multimedia Event Detection (MED) : Our main focus for the MED task is on the study of a new zero-example system, which aims to solve the 000Ex and SQ problems. The system can run either fully automatically or semi-automatically. Specifically, we test the automatic run in 000Ex submission and the semi-automatic run in SQ submission. Multimedia Event Recounting (MER) : For the 010Ex sub-tasks of both PS and AH event recounting, we design and implement a simple but effective system to optimize the concept-to-event relevance, evidence diversity and timing of evidential shots. We show that good performance can be achieved by only selecting the three shots with the highest confidence.