Patent ID: 8343037

Claim:
An endoscope apparatus comprising: an insertion portion for insertion into a body cavity; an image-acquisition unit that acquires an image of the inside of the body cavity at a tip of the insertion portion; an insertion-length measuring unit that is disposed at a base end of the insertion portion and that measures an insertion length of the insertion portion inside the body cavity; a storage unit that stores the image acquired by the image-acquisition unit in association with the insertion length measured by the insertion-length measuring unit; a following decision unit that determines whether insertion movement at the tip of the insertion portion follows insertion movement at the base end of the insertion portion; a correcting unit that corrects the insertion length of the insertion portion associated with the image acquired by the image-acquisition unit so as to cancel a change in the insertion length measured by the insertion-length measuring unit in a period where the insertion movement at the tip does not follow the insertion movement at the base end, on the basis of a determination result from the following decision unit.