Patent ID: 9681831
Date: 2017-06-20
CPC Classifications: A61B,A61K,A61M,H04N

Claim:
1. An endoscope system, comprising: a processor device configured to acquire a first image signal corresponding to a first wavelength range where an amount of light absorption changes according to concentration of yellow dye, a second image signal corresponding to a second wavelength range where the amount of light absorption changes according to a blood volume of an observation target, and a third image signal corresponding to a third wavelength range where a change in the amount of light absorption according to the concentration of the yellow dye is small compared with the first wavelength range and a change in the amount of light absorption according to the blood volume is small compared with the second wavelength range, calculate a first signal ratio for each pixel based on the first and second image signals and calculates a second signal ratio for each pixel based on the second and third image signals, and calculate a threshold value for comparison with the first signal ratio according to the second signal ratio and generate a warning signal for giving a warning for prompting cleaning of the observation target based on a comparison result between the first signal ratio and the threshold value.