Patent ID: 11889988
Assignee: OLYMPUS CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC A  G  H | IPC A  G  H

Claim 17:
18. A method for controlling an endoscope apparatus including a light source apparatus and an image pickup apparatus, the light source apparatus being configured to sequentially or simultaneously generate first light and second light, wherein a wavelength band of the first light belongs to a red color gamut, and a wavelength band of the second light being out of the wavelength band of the first light and having a shorter wavelength than the first light, and the image pickup apparatus being configured to generate a first image-pickup signal of a first image based on return light from an object irradiated with the first light, and generate a second image-pickup signal of a second image based on the return light from the object irradiated with the second light, the method comprising:
acquiring signal intensity information based on a predetermined parameter indicating a present operation state of the light source apparatus,
wherein the signal intensity information is a ratio of (i) signal intensity of the first image-pickup signal when the object is irradiated with the first light having a central wavelength different from a predetermined central wavelength of the first light having the wavelength band belonging to the red color gamut, with respect to (ii) reference signal intensity of the image-pickup signal when the object is irradiated with the first light having the wavelength belonging to the red color gamut; and

performing, based on the signal intensity information, control of the light source apparatus to maintain a brightness ratio of the first image and the second image at a constant ratio.