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| 镜头频度用于视频检索的研究 |
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白雪生1,2, 徐光祐1,2, 史元春1,2
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1.清华大学计算机科学与技术系,北京,100084;2.清华大学智能技术与系统国家重点实验室,北京,100084
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| 摘要: |
| 在电影、电视等观赏类视频信号中,情节的紧张程度一般都在镜头的切换频率上得以体现,而在对此类视频信号的检索中，用户往往希望能够根据情节紧张程度来进行检索.文章提出了对此类视频信号的镜头切换频率进行度量,并根据得到的镜头频度进行视频检索的方法,给出了视频流的镜头分割算法,以及为减小漏分/错分影响所采用的镜头频度度量——镜头平均帧数的鲁棒计算方法.文章还阐述了利用镜头频度进行视频检索的基本思想及算法细节,并给出了对于实际影片视频信号检索的实验结果和分析. |
| 关键词: 视频检索,镜头频度,镜头切变,镜头渐变,镜头平均帧数. |
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| 基金项目:本文研究得到国家863高科技项目基金和国家“211”学科建设项目基金资助. |
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| Using Shot Frequency in Video Retrieval |
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BAI Xue-sheng,XU Guang-you,SHI Yuan-chun
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| Abstract: |
| In the film, television and many other videos, exciting video sections are usually reflected by their frequent shot changes, and such sections are the most frequently objects in retrieval of this kind of video. In this paper, a method on retrieving videos according to their shot change frequencies is presented. Scene transition analysis has done on real videos, and video segmentation algorithm for both cut and dissolve are developed. To lessen the influence of error and missing shot segmentations, a robust calculation method of shot frequency on shot sequence acquired is proposed. Basic ideas and algorithm modules are given in detail, also with the experimental results on film video and analysis. |
| Key words: Video retrieval, shot frequency, shot cut, chromatic edit, average frame number. |
