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:
- 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 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 the 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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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.
12 Citations
9 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:
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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 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 the 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. 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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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 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 in the intensity detecting; and identifying the 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 in the pigment component identifying.
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9. A 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 function as:
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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 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 the 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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Specification