| http://www.w3.org/ns/prov#value | - Another endoscope inserting direction detecting method in accordance with the present invention consists mainly of: a first step of determining inserting-direction candidates, that is, candidates for an endoscope inserting direction in which an endoscope should be inserted; a second step of receiving an endoscopic image; a third step of detecting the direction of a change in brightness in the endo
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