Algorithm 5 Calculating the utility of the photos

1:    Input: Local K-CoverPicTree

2:    Total utility = 0

3:    Call Algorithm 4

4:    for s = 1:S do

5:    for k = 1:K do

6:     if ((size of Photos(s, k) > 0)) then

7:       Total utility = Total utility + Area of sub-region × θ

8:     end if

9:    end for

10:   end for