IMAGE PROCESSING APPARATUS FOR ELECTRONIC ENDOSCOPE, ELECTRONIC ENDOSCOPE SYSTEM, AND IMAGE PROCESSING METHOD FOR ELECTRONIC ENDOSCOPE

摘要

PROBLEM TO BE SOLVED: To provide an image processing apparatus for an electronic endoscope, an electronic endoscope system, and an image processing method for an electronic endoscope, which can improve the visibility of an image in a peripheral portion of a captured image under certain conditions without degrading the visibility of an image in a central portion of the captured image that is captured by a wide-angle objective lens.SOLUTION: When a value of the aspect ratio of the display area of an image display apparatus is larger than a value of the aspect ratio of a captured image indicated by an imaging signal, image processing is performed for making the magnification of an image in a peripheral portion outside a central portion of the captured image larger than the magnification of an image in the central portion so that the aspect ratio is matched to that of the display area of the image display apparatus. As a result, the magnification of the image in the peripheral portion of the captured image is increased by the use of the display area extending crosswise, without degrading the visibility of the image in the central portion of the captured image, thereby enabling improvement of the visibility of the image in the peripheral portion.SELECTED DRAWING: Figure 7