A semantic unit based event detection scheme in soccer videos is proposed in this paper.The scheme can be characterized as a three-layer framework. At the lowest layer, low-level featuresincluding color, texture, edge...A semantic unit based event detection scheme in soccer videos is proposed in this paper.The scheme can be characterized as a three-layer framework. At the lowest layer, low-level featuresincluding color, texture, edge, shape, and motion are extracted. High-level semantic events aredefined at the highest layer. In order to connect low-level features and high-level semantics, wedesign and define some semantic units at the intermediate layer. A semantic unit is composed of asequence of consecutives frames with the same cue that is deduced from low-level features. Based onsemantic units, a Bayesian network is used to reason the probabilities of events. The experiments forshoot and card event detection in soccer videos show that the proposed method has an encouragingperformance.展开更多
精彩事件检测在体育视频语义分析领域具有很高的学术研究价值和广泛的市场应用前景.利用隐条件随机场(hidden conditional random field,HCRF)模型在表达和识别语义事件方面的强大功能,创新性地提出了一种融合了HCRF和情感激励模型(affe...精彩事件检测在体育视频语义分析领域具有很高的学术研究价值和广泛的市场应用前景.利用隐条件随机场(hidden conditional random field,HCRF)模型在表达和识别语义事件方面的强大功能,创新性地提出了一种融合了HCRF和情感激励模型(affective arousal model,AAM)的精彩事件检测方法.首先,通过精彩事件视频结构语义分析,定义了13种多模态语义线索,以准确描述精彩事件富含的语义信息;其次,在基于概念格的多模态语义线索聚类基础上,添加时域特征信息,以构建特征值加权的情感激励模型,得到了各类精彩事件的情感激励值;最后,在小规模训练样本情况下,有效建立了各类精彩事件检测的HCRF模型,基于视频语义镜头序列、情感激励值序列和精彩事件之间的映射关系,从多模态语义线索、视频结构语义、情感语义等多个维度挖掘了精彩事件的潜在规律,实现了同一HCRF模型下各类精彩事件的同时检测.实验证明了该方法的有效性.展开更多
文摘A semantic unit based event detection scheme in soccer videos is proposed in this paper.The scheme can be characterized as a three-layer framework. At the lowest layer, low-level featuresincluding color, texture, edge, shape, and motion are extracted. High-level semantic events aredefined at the highest layer. In order to connect low-level features and high-level semantics, wedesign and define some semantic units at the intermediate layer. A semantic unit is composed of asequence of consecutives frames with the same cue that is deduced from low-level features. Based onsemantic units, a Bayesian network is used to reason the probabilities of events. The experiments forshoot and card event detection in soccer videos show that the proposed method has an encouragingperformance.
