Analyzing apparatus

An analyzing apparatus comprising:

• a light source apparatus;
• an image sensor that generates color image data by capturing an image of biological tissue illuminated by light generated by the light source apparatus, the color image data being RGB color image data;
• an indicator calculator that calculates an indicator X that indicates a feature amount Q of the biological tissue, based on the color image data;
• and
• a feature amount acquirer that acquires the feature amount Q based on the indicator X,
• wherein the light source apparatus switches between generating light for calculating the indicator X and normal light,
• the feature amount acquirer includes a contribution calculator that calculates a contribution C based on at least two colors of single-color image data included in the color image data, the contribution C quantifying a degree of contribution of scattering on a spectral characteristic of the biological tissue,
• the feature amount acquirer acquires the feature amount Q based on the indicator X and the contribution C,
• the contribution calculator calculates the contribution C based on color image data obtained by capturing an image of the biological tissue illuminated by the normal light as a ratio of R single-color image data to G or B single-color image data in the color image data of one frame, and
• the light for calculating includes:
• first light that has a continuous spectrum distributed in a first wavelength region in which light is absorbed by first and second biological substances included in the biological tissue;
• and
• second light that has a continuous spectrum distributed in a second wavelength region in the first wavelength region,
• the light source apparatus switches between generating the first light, the second light, and the normal light, and
• the indicator calculator calculates the indicator X based on first observation image data G1 obtained by capturing an image of the biological tissue illuminated by the first light and second observation image data G2 obtained by capturing an image of the biological tissue illuminated by the second light,
• wherein each wavelength bounding the first wavelength region and the second wavelength region is located at an isosbestic point.