Algorithm 1: Reduce the impact of illumination changes

$\mathrm{Input}: \mathrm{video} \mathrm{frames}{I}^{\left(p\right)}(1\le p\le N)$$, \mathrm{set} THR\_R$ as threshold selected for peak point,

$THR\_R \mathrm{as} \mathrm{threshold} \mathrm{selected} \mathrm{for} ME$.

Output: store position of suspicious tampering point in S.

$1: S = \varnothing$, C = 0 //C is the variable counter for peak point

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

$3: \mathrm{calculate} OF$ $\mathrm{fluctuation} \mathrm{feature} r_i$ $\mathrm{and} \mathrm{motion} \mathrm{entropy} ME$

$4: \mathbf{i}\mathbf{f} r_{i}THR\_R$then

$5: \mathrm{add} i$$\mathrm{into} S$

$6: C+=1$

7:  end if

8: end for

$9: \mathbf{i}\mathbf{f} C\ge 1$

$10: \mathbf{i}\mathbf{f} ME\le THR\_E \mathbf{t}\mathbf{h}\mathbf{e}\mathbf{n}$

11:   (a) return FORGED VIDEO

$13: \left(\mathrm{b}\right) \mathrm{store} S,C$

14:  else run Algorithm 2

15:  end if

16:else return ORIGINAL VIDEO

17:end if