发明名称 |
System and method for seat occupancy detection from ceiling mounted camera using robust adaptive threshold criteria |
摘要 |
A method for detecting sitting behavior includes acquiring a sequence of frames capturing a scene-of-interest at an overhead view. The method includes detecting at least one empty seat within the scene-of-interest and associating the seat as being unoccupied and the frame as a reference frame. The method includes extracting reference features describing a region of the unoccupied seat in the reference frame and quantifying the reference features to form a reference feature vector. The method includes extracting features describing the region in a given frame and quantifying the features to form a current feature vector. The method includes measuring a change in a feature vector over time using the reference feature vector and the current feature vector. The method includes and determining a status of the seat in the given frame as being one of occupied and unoccupied based on the change in the feature vector. |
申请公布号 |
US9378421(B2) |
申请公布日期 |
2016.06.28 |
申请号 |
US201514673943 |
申请日期 |
2015.03.31 |
申请人 |
Xerox Corporation |
发明人 |
Loce Robert P.;Sultani Waqas;Wu Hao;Xu Beilei |
分类号 |
G06K9/00;G06K9/32;G06K9/46;G06K9/62 |
主分类号 |
G06K9/00 |
代理机构 |
Fay Sharpe LLP |
代理人 |
Fay Sharpe LLP |
主权项 |
1. A method for detecting sitting behavior, the method comprising:
acquiring a sequence of frames capturing a scene-of-interest at an overhead view; detecting at least one empty seat within the scene-of-interest and associating the seat as being unoccupied and the frame as a reference frame; extracting reference features describing a region of the unoccupied seat in the reference frame and quantifying the reference features to form a reference feature vector; extracting features describing the region in a given frame and quantifying the features to form a current feature vector; measuring a change in a feature vector over time using the reference feature vector and the current feature vector; and, determining a status of the seat in the given frame as being one of occupied and unoccupied based on the change in the feature vector. |
地址 |
Norwalk CT US |