期刊：
ACM International Conference Proceeding Series,2014年:177-180
作者机构：
[Ding, Wan; Yu, Xinguo] National Engineering Research Center for E-Learning, Central China Normal University, Wuhan, China;[Ye, Nan] School of Computing, National University of Singapore, Singapore
会议名称：
6th International Conference on Internet Multimedia Computing and Service, ICIMCS 2014
会议时间：
July 10, 2014 - July 12, 2014
会议地点：
Xiamen, China
关键词：
Character recognition;Event detection;Multimedia
摘要：
Goal events are important in automatic analysis of broadcast sports game videos, but previous approaches rely on visual or audio information which are hard to obtain. In this paper, we use superimposed texts to detect goals (both the occurrences of goal events and their types) for broadcast basketball video, and we propose a transition pattern based approach for both text extraction and goal detection. Our approach is lightweight and effectively handles main challenges in extracting superimposed texts: complex background, low-resolution and blur of the texts, which made standard localization and character recognition algorithms inaccurate. We focus on extracting superimposed game clock and game score texts in broadcast basketball video. We exploit transition patterns to develop a Hough transform for localization, and conditional random fields (CRFs) for both score digit recognition and goal detection. The experiments show that our transition pattern based approach leads to high accuracy for both superimposed text extraction and goal detection. Categories and Subject Descriptors I.2.10 [Artificial Intelligence]: Vision and Scene Understandings -Video Analysis. General Terms Algorithms. Copyright 2014 ACM.
期刊：
ACM International Conference Proceeding Series,2013年:364-367
作者机构：
[Yu, Xinguo; Cheng, Jun; Song, Wu; He, Bin] National Engineering Research Center for E-Learning, Center China Normal University, Wuhan, 430079, China
会议名称：
5th International Conference on Internet Multimedia Computing and Service, ICIMCS 2013
