Methods and Systems for Imaging Skin Using Polarized Lighting
First Claim
Patent Images
1. An imaging system for imaging skin, comprising:
- a light source to illuminate a subject;
a first polarizer to polarize light provided by the light source to illuminate the subject;
a photodetector to acquire an image of the subject as illuminated by the light source; and
an adjustable second polarizer, coupled to the photodetector, to provide an adjustable degree of polarization of light received by the photodetector.
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Abstract
An imaging system for imaging skin includes a light source to illuminate a subject and a first polarizer to polarize light provided by the light source to illuminate the subject. The imaging system also includes a photodetector to acquire an image of the subject as illuminated by the light source and an adjustable second polarizer, coupled to the photodetector, to provide an adjustable degree of polarization of light received by the photodetector.
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Citations
26 Claims
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1. An imaging system for imaging skin, comprising:
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a light source to illuminate a subject; a first polarizer to polarize light provided by the light source to illuminate the subject; a photodetector to acquire an image of the subject as illuminated by the light source; and an adjustable second polarizer, coupled to the photodetector, to provide an adjustable degree of polarization of light received by the photodetector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of generating a sub-surface skin image, comprising:
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illuminating a subject with polarized light having a first polarization; setting an adjustable polarizer to a first setting to admit light having the first polarization onto a photodetector and otherwise reject light; with the adjustable polarizer in the first setting, using the photodetector to acquire a first image of the illuminated subject; setting the adjustable polarizer to a second setting to at least partially reject light having the first polarization and to at least partially admit light having polarization distinct from the first polarization onto the photodetector; with the adjustable polarizer in the second setting, using the photodetector to acquire a second image of the illuminated subject; and subtracting the first image from the second image to generate a third image of the subject. - View Dependent Claims (20, 21, 22, 23)
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24. A computer-implemented method of processing and displaying images of skin, comprising:
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receiving a first image of a subject, the first image having been acquired at an optical apparatus with the subject illuminated with light having a first polarization and the optical apparatus configured to receive light having the first polarization and to otherwise reject light; receiving a second image of the subject, the second image having been acquired at the optical apparatus with the subject illuminated with light having the first polarization and the optical apparatus configured to at least partially reject light having the first polarization and to at least partially receive light having polarization distinct from the first polarization; subtracting the first image from the second image to generate a third image of the subject; and displaying the third image.
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25. A system for processing and displaying images of skin, comprising:
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memory; a display; one or more processors; and one or more programs stored in the memory and configured for execution by the one or more processors, the one or more programs including; instructions to receive a first image of a subject, the first image having been acquired at an optical apparatus with the subject illuminated with light having a first polarization and the optical apparatus configured to receive light having the first polarization and to otherwise reject light; instructions to receive a second image of the subject, the second image having been acquired at the optical apparatus with the subject illuminated with light having the first polarization and the optical apparatus configured to at least partially reject light having the first polarization and to at least partially receive light having polarization distinct from the first polarization; instructions to subtract the first image from the second image to generate a third image of the subject; and instructions to display the third image.
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26. A computer readable storage medium storing one or more programs configured to be executed by a computer system to process and display images of skin, the one or more programs comprising:
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instructions to receive a first image of a subject, the first image having been acquired at an optical apparatus with the subject illuminated with light having a first polarization and the optical apparatus configured to receive light having the first polarization and to otherwise reject light; instructions to receive a second image of the subject, the second image having been acquired at the optical apparatus with the subject illuminated with light having the first polarization and the optical apparatus configured to at least partially reject light having the first polarization and to at least partially receive light having polarization distinct from the first polarization; instructions to subtract the first image from the second image to generate a third image of the subject; and instructions to display the third image.
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Specification