Algorithm 3: judgment of video tamper

Input:suspicious tampering point set in S, the variable counter for peak point C

$\mathrm{Output}: \mathrm{frame} \mathrm{insertion} \mathrm{set}{S}_{insert }$$, \mathrm{frame} \mathrm{deletion} \mathrm{set} S_{delete}$

$1: S_{insert }=\varnothing ,S_{delete}=\varnothing$

$2: \mathbf{f}\mathbf{o}\mathbf{r} i=1;i<C;i++$do

$3: \mathbf{f}\mathbf{o}\mathbf{r} j=i+1;j<C;j++$do

$4: \mathbf{i}\mathbf{f} j>C$:

$5: \mathrm{add} i$$\mathrm{into} S_{delete}$

6:      else:

$7: \mathrm{calculate} OF$$\mathrm{fluctuation} \mathrm{feature} \mathrm{r} \mathrm{between} \mathrm{frame} S\left[i\right]-1$$\mathrm{and} S\left[j\right]+1$

$8: \mathbf{i}\mathbf{f} r\approx 1$:

$9: \mathrm{add} i,j$$\mathrm{into} S_{insert }$

10:         end if

11:      end if

12:   end for

13: end for