Table 2.

Notation used in this paper.

Symbol	Meaning
S	Camera node set, S = {S1, S2, …, Sn}, where Si also represent the position of the i-th camera node
P	Location of the intruder
R	Sensing radius of the camera node
r	Radius of the maximum full-view neighborhood coverage disk
r′	Radius of the trajectory for nodes around P
$\phi$	One-half of camera’s angle of view
$\theta$	Effective angle
l	Grid length in the triangle lattice-based deployment
λ	Sensor density for achieving full-view area coverage
Sc	Camera’s field of view (FoV)
D(P, r)	Disk with r as the radius and P as the center
Tk	The k-th sector
$\overrightarrow{d_i}$	Working direction of the i-th camera node
$\overrightarrow{f}$	Facial direction of the intruder
$\overrightarrow{r_s}$	Start line for dividing C(P, R) into T1, T2, …, Tk