Patent ID: 9097589
Filing Date: 2015-08-04
Classification: A61B,G01J

Abstract:
1. A signal processing apparatus for separating light from a specified subject into an illumination light component and a pigment component, the illumination light component resulting from a color of light with which the subject is irradiated, the pigment component resulting from a color of a pigment of the subject, the signal processing apparatus comprising a processor, the processor including a program stored therein for causing the processor to perform executable sections, the executable sections comprising: a subject image obtaining section that obtains a subject image including R, G, and B components; an optical intensity detecting section that detects an intensity of the light from the subject at a first wavelength and a second wavelength, the first wavelength being different from the second wavelength; a pigment component identifying section that identifies the pigment component of the subject image, based on a difference between a first absorptance of the subject at the first wavelength and a second absorptance of the subject at the second wavelength, and a difference between an intensity at the first wavelength and an intensity at the second wavelength that are detected by the optical intensity detecting section; an illumination light component identifying section that identifies the illumination light component of the subject image, based on the subject image and the pigment component identified by the pigment component identifying section, a subject information storing section that stores color information of the subject indicating intensities of respective R, G and B components in association with the difference between the first absorptance and the second absorptance of the subject and the difference between the detected intensity at the first wavelength and the detected intensity at the second wavelength, an illumination light image generating section that generates an image of the illumination light component identified by the illumination light component identifying section, by subtracting color information of the pigment component identified by the pigment component identifying section from the color information of the subject image obtained by image-capturing the subject.