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

An information processing method that is performed by an information processing apparatus, the method comprising:

• estimating a sensor input that is spectral information of input light to a spectral sensor on a basis of spectral reflectance information of a target subject and spectral information of a target light source;
• estimating a sensor output that is spectral information output by the spectral sensor according to the sensor input on a basis of spectral sensitivity information of the spectral sensor and the sensor input;
• and
• obtaining an arithmetic algorithm that minimizes an error between a wavelength characteristic indicated by post-narrow-band spectral information obtained by performing narrow-band processing based on the sensor output and a wavelength characteristic indicated by the sensor input as an arithmetic algorithm of the narrow-band processing that is processing of estimating spectral information on a larger number of wavelengths than a number of output wavelengths of the spectral sensor on a basis of the output spectral information of the spectral sensor.

A program readable by a computer device, the program causing the computer device to realize a function of:

• estimating a sensor input that is spectral information of input light to a spectral sensor on a basis of spectral reflectance information of a target subject and spectral information of a target light source;
• estimating a sensor output that is spectral information output by the spectral sensor according to the sensor input on a basis of spectral sensitivity information of the spectral sensor and the sensor input;
• and
• obtaining an arithmetic algorithm that minimizes an error between a wavelength characteristic indicated by post-narrow-band spectral information obtained by performing narrow-band processing based on the sensor output and a wavelength characteristic indicated by the sensor input as an arithmetic algorithm of the narrow-band processing that is processing of estimating spectral information on a larger number of wavelengths than a number of output wavelengths of the spectral sensor on a basis of the output spectral information of the spectral sensor.

An image processing apparatus that uses an arithmetic algorithm obtained by an information processing apparatus, the information processing apparatus including a sensor input estimation unit that estimates a sensor input that is spectral information of input light to a spectral sensor on a basis of spectral reflectance information of a target subject and spectral information of a target light source;

• a sensor output estimation unit that estimates a sensor output that is spectral information output by the spectral sensor according to the sensor input on a basis of spectral sensitivity information of the spectral sensor and the sensor input;
• and a derivation processing unit that obtains an arithmetic algorithm that minimizes an error between a wavelength characteristic indicated by post-narrow-band spectral information obtained by performing narrow-band processing based on the sensor output and a wavelength characteristic indicated by the sensor input as an arithmetic algorithm of the narrow-band processing that is processing of estimating spectral information on a larger number of wavelengths than a number of output wavelengths of the spectral sensor on a basis of the output spectral information of the spectral sensor,
• the image processing apparatus comprising:
• a spectral image generation unit that generates a narrow-band image with respect to a larger number of wavelengths than a number of output wavelengths of the spectral sensor by performing the narrow-band processing based on an output of the spectral sensor.

An image processing method that is performed by an image processing apparatus, the image processing apparatus using an arithmetic algorithm obtained by an information processing apparatus, the information processing apparatus including a sensor input estimation unit that estimates a sensor input that is spectral information of input light to a spectral sensor on a basis of spectral reflectance information of a target subject and spectral information of a target light source;

• a sensor output estimation unit that estimates a sensor output that is spectral information output by the spectral sensor according to the sensor input on a basis of spectral sensitivity information of the spectral sensor and the sensor input;
• and a derivation processing unit that obtains an arithmetic algorithm that minimizes an error between a wavelength characteristic indicated by post-narrow-band spectral information obtained by performing narrow-band processing based on the sensor output and a wavelength characteristic indicated by the sensor input as an arithmetic algorithm of the narrow-band processing that is processing of estimating spectral information on a larger number of wavelengths than a number of output wavelengths of the spectral sensor on a basis of the output spectral information of the spectral sensor,
• the method comprising:
• generating a narrow-band image with respect to a larger number of wavelengths than a number of output wavelengths of the spectral sensor by performing the narrow-band processing based on an output of the spectral sensor.