【音视频开发】视频中运动模糊与拖影现象深度解析技术文档θ = arctan ( v y v x ) L = v x 2 + v y 2 × Δ t I ( x , y ) = 1 N ∑ i = 0 N − 1 I 0 ( x − v x i Δ t , y − v y i Δ t ) \theta = \arctan\left(\frac{v_y}{v_x}\right) \\ L = \sqrt{v_x^2 + v_y^2} \times \Delta t \\ I(x,y) = \frac{1}{N}\sum_{i=0}^{N-1} I_0(x-v