Signal processing apparatus, signal processing method and computer readable medium
First Claim
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,wherein the optical intensity detecting section detects the intensity of the light from the subject at the first wavelength, at which a light absorption characteristic of the subject takes a minimal value and at the second wavelength, at which the light absorption characteristic of the subject takes a maximal value;
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,wherein the pigment component identifying section identifies intensities for respective R, G and B components of the pigment component of the subject image, based on the color information stored in the subject information storing section, andwherein the illumination light component identifying section identifies intensities for respective R, G and B components of the illumination light component of the subject image, by subtracting intensities for respective R, G, and B components of the pigment component identified by the pigment component identifying section from intensities for respective R, G, and B components of color information of the subject image; and
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.
1 Assignment
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Accused Products
Abstract
A signal processing apparatus includes an optical intensity detecting section that detects an intensity of light from a subject at a first wavelength and a second wavelength, where the first wavelength is different from the second wavelength, a pigment component identifying section that identifies a pigment component in the light from the subject, based on (i) 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 (ii) a difference between the intensity at the first wavelength and the intensity at the second wavelength that are detected by the optical intensity detecting section, and an illumination light component identifying section that identifies an illumination light component in the light from the subject, based on a subject image obtained by image-capturing the subject and the pigment component identified by the pigment component identifying section.
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Citations
14 Claims
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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:
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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, wherein the optical intensity detecting section detects the intensity of the light from the subject at the first wavelength, at which a light absorption characteristic of the subject takes a minimal value and at the second wavelength, at which the light absorption characteristic of the subject takes a maximal value; 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, wherein the pigment component identifying section identifies intensities for respective R, G and B components of the pigment component of the subject image, based on the color information stored in the subject information storing section, and wherein the illumination light component identifying section identifies intensities for respective R, G and B components of the illumination light component of the subject image, by subtracting intensities for respective R, G, and B components of the pigment component identified by the pigment component identifying section from intensities for respective R, G, and B components of color information of the subject image; and 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A signal processing method 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 method comprising:
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obtaining a subject image including R, G, and B components; detecting 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; identifying 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 in the intensity detecting; identifying the illumination light component of the subject image, based on the subject image and the pigment component identified in the pigment component identifying, wherein said detecting comprises detecting the intensity of the light from the subject at the first wavelength, at which a light absorption characteristic of the subject takes a minimal value and at the second wavelength, at which the light absorption characteristic of the subject takes a maximal value; storing 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, wherein the identifying the illumination light component comprises identifying intensities for respective R, G and B components of the pigment component of the subject image, based on the color information stored in the storing color information, and wherein, said identifying the illumination light component comprises identifying intensities for respective R, G and B components of the illumination light component of the subject image, by subtracting intensities for respective R, G, and B components of the identified pigment component from intensities for respective R, G, and B components of color information of the subject image; and generating, by a processor of a computer, an image of the identified illumination light component by subtracting color information of the identified pigment component from the color information of the subject image. - View Dependent Claims (12)
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13. A non-transitory computer readable medium storing thereon a program for use with a signal processing apparatus that separates 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 program causing a computer to perform functions in executable sections, the executable sections comprising:
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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, wherein the optical intensity detecting section detects the intensity of the light from the subject at the first wavelength, at which a light absorption characteristic of the subject takes a minimal value and at the second wavelength, at which the light absorption characteristic of the subject takes a maximal value; 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, wherein the pigment component identifying section identifies intensities for respective R, G and B components of the pigment component of the subject image, based on the color information stored in the subject information storing section, and wherein the illumination light component identifying section identifies intensities for respective R, G and B components of the illumination light component of the subject image, by subtracting intensities for respective R, G, and B components of the pigment component identified by the pigment component identifying section from intensities for respective R, G, and B components of color information of the subject image; and 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. - View Dependent Claims (14)
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Specification