Algorithm 1: Voting Scheme

Input: all candidate sorted images { $I_1,I_2,\dots ,I_n$ }

1: Vote for all sorted images { $I_1,I_2,\dots ,I_n$ };

2: If the top sorted three candidate images { $I_1,I_2,I_3$ } are associated with the same id;

3: Then, the best matching image $I_{best}$ is $I_1$;

4: Otherwise, the best matching can be acquired using the surf matching Algorithm;

Output: the best matching image $I_{best}$