US Patent 11039732 Endoscopic system and method of operating same

An image selection unit selects a B2 image signal of which an image blurring amount satisfies a first condition, from a B2 image signal at a first timing T1 or B2 image signals at the second timing T2 to an N-th timing TN. A computed image signal generation unit performs computation based on a B1 image signal at the first timing T1 and a second image signal selected in the image selection unit, thereby generating a computed image signal.