微空间场景与视频分析相结合的审讯室异常行为检测
作者简介:胡加佩(1986-),女,江苏无锡人,博士生,研究方向为影视GIS、视频监控与空间关系等。E-mail:demon688@163.com
收稿日期: 2013-08-26
要求修回日期: 2013-11-29
网络出版日期: 2014-07-10
基金资助
“十二五”国家支撑计划项目“视频GIS与突发公共事件的感知控制系统”(2012BAH35B02)
江苏省高校自然科学重大基础研究项目“基于平面视频的可量测三维视频构建关键技术研究”(10KJA420025)
A Method of Abnormal Behavior Detection in Interrogation Room Based on Video Analysis Combined with Micro-spatial Environment
Received date: 2013-08-26
Request revised date: 2013-11-29
Online published: 2014-07-10
Copyright
行为检测是智能视频分析的研究热点。目前,行为分析主要是基于视频图像空间,而丰富的空间场景信息并未得到有效利用。事实上,个体行为与空间场景紧密关联,不同场景可能具有不同的行为表征。本文以审讯室的典型微空间场景为例,以刑讯逼供行为检测为研究内容,探究空间场景约束下的个体异常行为检测方法。首先,从行为变量的概念出发,解析了刑讯逼供的行为变量和行为类型;其次,分析了刑讯逼供行为变量的视频特征,并设计了相应的行为变量检测模型;再次,通过灭点计算实现了空间场景和视频图像的双向映射关系的解算,并在此基础上设计了顾及空间场景的刑讯逼供行为分级分类检测策略;最后,通过模拟实验对本文方法的可行性进行了分析验证。
胡加佩 , 王小勇 , 刘学军* . 微空间场景与视频分析相结合的审讯室异常行为检测[J]. 地球信息科学学报, 2014 , 16(4) : 545 -552 . DOI: 10.3724/SP.J.1047.2014.00545
The detection of anomalous human behaviors has received tremendous attention in the research of intelligent video analysis. However, most of existing methods for anomaly analysis are based on image space, and abundant information in the geographical space goes unused. In fact, human activities are closely related to geographical spaces, and different scenario types may correspond to different classes of human behaviors. So, in this paper we chose interrogation room as a representative of the micro-spatial environment and conducted a study on the anomaly detection of extorting confessions by torture, considering the spatial constraints. Firstly, the concept of behavioral variables has been stated, and then behavioral variables and their classes of extorting confessions by torture have been deeply analyzed. Secondly, the video characters of behavioral variables of extorting confessions by torture have been discussed and their corresponding detection models have further been designed. Plus, a bi-directional mapping model between the geographical space and the image space has been constructed according to vanishing points. This proposed mapping method can effectively avoid the calculation of intrinsic and extrinsic camera parameters. Based on above, a hierarchical and classified strategy for anomaly detection of extorting confessions by torture has been developed, considering the spatial constraints to human behaviors without learning and training processes. At last, the presented method in this paper is tested and verified by a series of simulated experiments.
Fig.1 Behavior types of extorting confessions by torture图1 刑讯逼供行为类型 |
Fig.2 Alert area options in interrogation room图2 审讯室场景警戒区域设置 |
Fig.3 Mapping results from geographical space to image space图3 场景到视频映射结果 |
Fig.4 Flow chart of anomaly detection in interrogation room considering spatial constraints图4 顾及场景约束的审讯室异常行为检测算法流程图 |
Fig.5 User interface of our system图5 系统主界面 |
Fig.6 Startup interface of the behavioral recognition图6 行为识别启动界面 |
Fig.7 Recognition results of serious violence图7 重暴力行为识别结果 |
Fig.8 Recognition results of mild violence图8 轻暴力行为识别结果 |
The authors have declared that no competing interests exist.
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