Information processing device, information processing method, program, image processing device, and image processing method

An information processing method executed by an information processing device, the information processing method comprising:

• estimating, on a basis of spectral reflectance information of a target subject and spectral information of a target light source, a sensor output that is output spectral information of a spectral sensor in a case where the spectral sensor has sensed the target subject irradiated with light from the target light source;
• and
• obtaining, as a computation algorithm of band-narrowing processing that is processing of estimating spectral information for a larger number of wavelengths than the number of output wavelengths of the spectral sensor on a basis of the output spectral information of the spectral sensor, a computation algorithm that minimizes an error between a wavelength characteristic indicated by post-band-narrowing spectral information obtained by executing the band-narrowing processing based on the sensor output and a wavelength characteristic indicated by the spectral reflectance information of the target subject.

A program readable by a computer device, the program causing the computer device to execute functions of:

• estimating, on a basis of spectral reflectance information of a target subject and spectral information of a target light source, a sensor output that is output spectral information of a spectral sensor in a case where the spectral sensor has sensed the target subject irradiated with light from the target light source;
• and
• obtaining, as a computation algorithm of band-narrowing processing that is processing of estimating spectral information for a larger number of wavelengths than the number of output wavelengths of the spectral sensor on a basis of the output spectral information of the spectral sensor, a computation algorithm that minimizes an error between a wavelength characteristic indicated by post-band-narrowing spectral information obtained by executing the band-narrowing processing based on the sensor output and a wavelength characteristic indicated by the spectral reflectance information of the target subject.

An image processing device comprising:

• a spectral image generation unit that generates a narrow-band image for a larger number of wavelengths than the number of output wavelengths of a spectral sensor by executing band-narrowing processing based on an output of the spectral sensor using a computation algorithm obtained by an information processing device including a sensor output estimation processing unit that estimates, on abasis of spectral reflectance information of a target subject and spectral information of a target light source, a sensor output that is output spectral information of the spectral sensor in a case where the spectral sensor has sensed the target subject irradiated with light from the target light source, and a derivation processing unit that obtains, as the computation algorithm of the band-narrowing processing that is processing of estimating spectral information for a larger number of wavelengths than the number of output wavelengths of the spectral sensor on a basis of the output spectral information of the spectral sensor, a computation algorithm that minimizes an error between a wavelength characteristic indicated by post-band-narrowing spectral information obtained by executing the band-narrowing processing based on the sensor output and a wavelength characteristic indicated by the spectral reflectance information of the target subject.