Endoscope apparatus, endoscope image processing apparatus, endoscope apparatus actuation method, and recording medium

An endoscope image processing apparatus comprising:

• a processor configured to:
• acquire signal intensity information based on a predetermined parameter indicating a present operation state,
• wherein the signal intensity information is a ratio of (i) signal intensity of a first image-pickup signal of a first image, the first image-pickup signal being generated based on return light from an object irradiated with a first light having a central wavelength different from a predetermined central wavelength of a first light having a wavelength band belonging to a red color gamut, with respect to (ii) reference signal intensity of the first image-pickup signal when the object is irradiated with the first light having a wavelength belonging to the red color gamut;
• and
• perform, based on the signal intensity information, control to maintain a brightness ratio of the first image and a second image at a constant ratio, the second image being picked up based on return light from the object irradiated with a second light, 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.

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.

A non-transitory computer-readable recording medium storing a program used in an endoscope apparatus including a light source apparatus, an image pickup apparatus, and a processor, 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, wherein the program causes the processor to at least perform:

• 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.