Proving Reliability of Image Processing Techniques in Digital Forensics Applications

Listing 20

Involution property of images.

	Lemma negimg_involution: forall img: image,
	negimage (negimage img) = img.
	Proof.
	intros.
	induction img.
	+ simpl. auto.
	+ simpl. rewrite IHimg.
	rewrite negpix_involution.
	auto.
	Qed.