Abstract: An image processing device includes: one or more processors including hardware. The one or more processors are configured to: calculate, on a basis of a reference image acquired by capturing an image of a reference subject which has an optical characteristic that is equivalent to at least a part of a living body, image transformation parameters through congruence transformation that transforms a coordinate corresponding to a color of target region included in the reference image defined in a color space into a coordinate corresponding to an achromatic color in the color space; and perform, in the color space on a basis of the calculated image transformation parameters, the congruence transformation of colors of a color image acquired by capturing an image of the living body, the color image being constituted by at least two monochromatic image corresponding to different illumination having different center wavelengths.

Abstract: An endoscope apparatus including: a light source configured to emit illumination light including light in a first wavelength band included in a blue wavelength band, light in a first narrowband included in a green wavelength band, and light in a second narrowband having a same light absorption coefficient of hemoglobin as that of the light in the first narrowband; an imager configured to acquire a first image of an object in the first wavelength band, a first narrowband image of the object in the first narrowband, and a second narrowband image of the object in the second narrowband; and a processor including hardware. The processor is configured to implement acquiring scattering characteristics information based on a comparison result between the first narrowband image and the second narrowband image, and generating an observation image using the first image, the first narrowband image, and the scattering characteristics information.

Abstract: An image processing device includes: one or more processors including hardware. The one or more processors are configured to: calculate, on a basis of a reference image acquired by capturing an image of a reference subject which has an optical characteristic that is equivalent to at least a part of a living body, image transformation parameters through congruence transformation that transforms a coordinate corresponding to a color of target region included in the reference image defined in a color space into a coordinate corresponding to an achromatic color in the color space; and perform, in the color space on a basis of the calculated image transformation parameters, the congruence transformation of colors of a color image acquired by capturing an image of the living body, the color image being constituted by at least two monochromatic image corresponding to different illumination having different center wavelengths.

Abstract: An endoscope apparatus including: a light source configured to emit illumination light including light in a first wavelength band included in a blue wavelength band, light in a first narrowband included in a green wavelength band, and light in a second narrowband having a same light absorption coefficient of hemoglobin as that of the light in the first narrowband; an imager configured to acquire a first image of an object in the first wavelength band, a first narrowband image of the object in the first narrowband, and a second narrowband image of the object in the second narrowband; and a processor including hardware. The processor is configured to implement acquiring scattering characteristics information based on a comparison result between the first narrowband image and the second narrowband image, and generating an observation image using the first image, the first narrowband image, and the scattering characteristics information.

Abstract: An imaging phantom according to the present invention includes a main body having an optical characteristic simulating an optical characteristic of biological tissue and a structure (3) installed in the main body, the structure having a fractal structure simulating a tissue structure having a fractal nature present in the biological tissue.

Abstract: An endoscope system includes: an endoscope with a unit to be inserted into a subject and captures an inside image of the subject by an imaging unit provided in the unit to generate an image signal; an optical apparatus including a measurement probe to be inserted into the subject through the unit; an endoscope unit that switches between observation light of a plurality of wavelengths and outputs the observation light to observe a target object from the unit; a probe unit that outputs measurement light to measure characteristics of the target object via the measurement probe; a light unit that receives return light via the measurement probe, the return light caused by reflection and/or scattering of the measurement light on the target object; and a switching unit that switches a wavelength band of the measurement light to a different wavelength band from the observation light outputted by the endoscope unit.

Abstract: An optical measurement apparatus that measures an optical property of a scattering medium includes a light source that supplies illumination light having at least one spectral component, an illumination fiber for guiding the light supplied by the light source and emitting the light to the scattering medium, a detection fiber for receiving returned light from the scattering medium at a tip thereof and guiding the returned light toward a base end thereof, a detecting unit that detects light output from the base end of the detection fiber, a measuring unit that measures a property of the scattering medium based on a detection result obtained by the detecting unit, and a switching unit that switches between total areas of emission regions, in which light is emitted, at an end face of the illumination fiber.

Abstract: An optical measurement device includes: a measurement light source unit that emits measurement light; measurement probe including an illumination fiber configured to radiate the measurement light to a living tissue, and a light-receiving fiber configured to receive return light of the measurement light reflected and/or scattered from the living tissue; a detection unit that detects the return light; an illumination control unit that causes the measurement light source unit to execute alternately emission and stoppage of the measurement light during the measurement and to emit the measurement light such that the emission time is longer than the stoppage time; and a computation unit that removes, from an intensity of return light of the measurement light detected by the detection unit, a detected intensity of return light of the observation light radiated by an endoscope and reflected from the living tissue.

Abstract: An optical measurement apparatus that measures a property of a scatterer, including: a light source that supplies illumination light having at least one spectral component; an illumination fiber that propagates, to a distal end thereof, light supplied from a proximal end thereof by the light source and illuminates light onto the scatterer from the distal end; first and second light detection fibers, each outputting, from a proximal end thereof, returned light from the scatterer, the returned light entering from a distal end thereof, the first and second light detection fibers having distal end positions different from each other in a longitudinal direction; a detection unit that detects light output from the proximal ends of the first and second light detection fibers; and a measurement unit that measures a property of the scatterer based on a result of the detection by the detection unit.

Abstract: An endoscope system includes: an endoscope with a unit to be inserted into a subject and captures an inside image of the subject by an imaging unit provided in the unit to generate an image signal; an optical apparatus including a measurement probe to be inserted into the subject through the unit; an endoscope unit that switches between observation light of a plurality of wavelengths and outputs the observation light to observe a target object from the unit; a probe unit that outputs measurement light to measure characteristics of the target object via the measurement probe; a light unit that receives return light via the measurement probe, the return light caused by reflection and/or scattering of the measurement light on the target object; and a switching unit that switches a wavelength band of the measurement light to a different wavelength band from the observation light outputted by the endoscope unit.

Abstract: An optical measurement apparatus that measures a property of a scatterer, including: a light source that supplies illumination light having at least one spectral component; an illumination fiber that propagates, to a distal end thereof, light supplied from a proximal end thereof by the light source and illuminates light onto the scatterer from the distal end; first and second light detection fibers, each outputting, from a proximal end thereof, returned light from the scatterer, the returned light entering from a distal end thereof, the first and second light detection fibers having distal end positions different from each other in a longitudinal direction; a detection unit that detects light output from the proximal ends of the first and second light detection fibers; and a measurement unit that measures a property of the scatterer based on a result of the detection by the detection unit.