Detection of suspicious activity and estimate of risk from human behavior shot by surveillance camera

In these days, surveillance camera system prevails as a security system at high speed because this system can monitor from remote places using Web camera attached to video monitor by network. Additionally, digital equipments such as Web camera, and hard disk drive are mass-produced, and are sold at low price. And, performance gain of these digital equipments improves at a rapid rate. Current surveillance camera system shows dynamic images from some oversight areas shot by multiple Web cameras at the same time. Then, this system makes observer´s mind and body tired because he/she has to watch enormous number of dynamic images been constantly updated. Moreover, this system has a serious problem, which is an observer slips over predictor of crime. This study extracts Motion Region from moving person, and measures Motion Quantity for measuring his/her active state. And, this proposal method finds the detecting point of suspicious activity, and estimates the degree of risk of the suspicious activity.