IMAGE PROCESSING DEVICE, AND METHOD FOR OPERATING ENDOSCOPE SYSTEM

摘要

An image processing device that enhances changes in color of mucosa or the like that may occur at the time of atrophy of stomach due to atrophic gastritis and a method for operating an endoscope system are provided. A first signal ratio (-log(B/G)) between a B image signal and a G image signal is calculated. A second signal ratio (-log(G/R)) between the G image signal and an R image signal is calculated. A difference between first and second signal ratios in a first area and first and second signal ratios in a specific area is increased to enhance a color difference between normal mucosa and an abnormal region (an atrophic mucosal region and a deep blood vessel region). The color difference between the normal mucosa and the abnormal region in a case where at least one of the RGB image signals is a narrowband image signal is greater than the color difference in a case where all of the RGB image signals are broadband image signals.