Application of K-Nearest Neighbor Classification for Static Webcams Visibility Observation

Table 4

Overview of disadvantages of the proposed method.

Disadvantages
Visibility related	Visibility is not strictly horizontal
	It can neglect shallow fog
	Visibility is observed only in some direction
	Threshold values will not be the same by all locations in the webcam network
Processing related	Not applicable in the area without any residual light at night
	Labeling must be done by human
	Locating observation landmarks must be done by human
	The algorithm may encounter challenges when employed in more automated settings or with moving cameras