Online Detection of Abnormal Events in Video Streams

Table 1

Different choices of feature 𝐹 to construct the covariance descriptor.

Feature vector 𝐹
𝐹1(6×6)	[𝑦𝑥𝑢𝑣𝑢𝑥𝑢𝑦]
𝐹2(6×6)	[𝑦𝑥𝑢𝑣𝑣𝑥𝑣𝑦]
𝐹3(8×8)	[𝑦𝑥𝑢𝑣𝑢𝑥𝑢𝑦𝑣𝑥𝑣𝑦]
𝐹4(12×12)	[𝑦𝑥𝑢𝑣𝑢𝑥𝑢𝑦𝑣𝑥𝑣𝑦𝑢𝑥𝑥𝑢𝑦𝑦𝑣𝑥𝑥𝑣𝑦𝑦]
𝐹5(17×17)	[𝑦𝑥𝑢𝑣𝑢𝑥𝑢𝑦𝑣𝑥𝑣𝑦𝑢𝑥𝑥𝑢𝑦𝑦𝑣𝑥𝑥𝑣𝑦𝑦𝐼𝐼𝑥𝐼𝑦𝐼𝑥𝑥𝐼𝑦𝑦]