Algorithm 4 Removing redundant photos

1:    Input: Local K-CoverPicTree

2:    for s = 1:S do

3:   Find all photos that cover sub-region s (Photos(s))

4:   for k = 1:K do

5:     for b = 1:B do

6:       Find photos that cover (s, b) from the same sector view (Photos(s, b, k))

7:     end for

8:     Find photos that cover all BoIs of sub-region s from sector k (Photos(s, 1:B, k) = Photos(s, k))

9:   end for

10:    if (size of Photos(s, k) > 0) do

11:      Redundant Photos = Photos(s, b, k) − Photos(s, k)

12:      Remove each redundant photo from the corresponding parent Node(s, b, k) in Local K-CoverPicTree

13:    end if

14: end for