| CPC A61B 1/0638 (2013.01) [A61B 1/000094 (2022.02); A61B 1/00045 (2013.01); A61B 1/00057 (2013.01); A61B 1/05 (2013.01); A61B 1/0655 (2022.02); A61B 1/0661 (2013.01); A61B 1/2736 (2013.01)] | 14 Claims |
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1. An endoscope system comprising:
a light source that emits first illumination light and second illumination light having an emission spectrum different from an emission spectrum of the first illumination light;
a light source controller that automatically switches the first illumination light and the second illumination light and emits each of the first illumination light and the second illumination light for a light emission period of at least one or more frames;
an image pickup sensor that includes specific pixels having sensitivity to the first illumination light and the second illumination light; and
a processor configured to function as:
an image acquisition unit that acquires first image signals obtained in a case where an image of biological tissue illuminated with the first illumination light is picked up by the image pickup sensor, and second image signals obtained in a case where an image of biological tissue illuminated with the second illumination light is picked up by the image pickup sensor; and
a display controller that causes a display to automatically switch and display a first observation image obtained on the basis of the first image signals and a second observation image obtained on the basis of the second image signals,
wherein the first image signals include first specific color signals output from the specific pixels, and the second image signals include second specific color signals output from the specific pixels,
the light source controller causes the first illumination light and the second illumination light to be emitted under specific light amount conditions, so that a signal value of the first specific color signal for specific biological tissue corresponding to at least specific biological tissue, which is a part of the biological tissue, among the first specific color signals is equal to a signal value of the second specific color signal for specific biological tissue corresponding to at least the specific biological tissue among the second specific color signals,
a light amount condition of the first illumination light and a light amount condition of the second illumination light in a case where a first calculation value obtained using a light intensity of the first illumination light, a spectral reflectivity of the specific biological tissue, and a spectral sensitivity of the specific pixel is equal to a second calculation value obtained using a light intensity of the second illumination light, the spectral reflectivity of the specific biological tissue, and the spectral sensitivity of the specific pixel are used as the specific light amount conditions,
the spectral reflectivity of the specific biological tissue is an average spectral reflectivity of a plurality of parts obtained by averaging of spectral reflectivities of biological tissue of the plurality of parts,
the plurality of parts include a gullet, a stomach, and a large intestine.
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