Events Calendar

PhD Defense - Chen Sun

PhD Defense- Chen Sun


Title: Event Detection and Recounting from Large-scale Web Videos

Committee: Ramakant Nevatia, Yan Liu, B. Keith Jenkins (external member)

Abstract:
Whether captured by smart phones, surveillance cameras or self-driving cars, videos stand out as as one of the most important and informative media in the digital world. Videos bring temporal information to the visual recognition domain, and open doors to applications such as motion analysis, tracking and event detection.

The primary goal of my research is to detect high-level events (e.g. birthday party, town hall meeting) from unconstrained web videos， and to generate video recounts containing key event evidence. The ever-increasing popularity of video capturing devices and sharing websites has created a huge gap between the fast pace of video generation and our ability to index them. In response, I aim to build a semantic representation of videos with objects, actions, events and their interactions.

My PhD work mainly focuses on the following three aspects towards this goal: (1) utilize temporal information effectively; (2) extract rich semantics with moderate video annotations; (3) build connection between videos and language. In this talk, I will introduce my recent work on weakly-supervised action recognition, and automatic visual concept discovery for image description and retrieval. I will also provide a brief overview of the history and state-of-the-art methods for action and event recognition.

Location: Charles Lee Powell Hall (PHE) - 223

Audiences: Everyone Is Invited

Contact: Lizsl De Leon