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US 11,452,455 B2Granted
Skin reflectance and oiliness measurement
AssigneeCanfield Scientific, Incorporated
InventorSachin V. Patwardhan
Life of this patent
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Abstract
Apparatuses and methods are disclosed for generating a quantitative indication of the degree of oiliness of skin. In exemplary embodiments, a difference image generated from parallel- and a cross-polarized images of an area of skin is subjected to an intensity thresholding operation. An oiliness metric is generated based on the average intensity of those pixels whose intensities do not exceed the threshold, and/or on the average intensity of those pixels whose intensities exceed the threshold. An indication based on the metric is generated and output.
Claims22
A method comprising:
- obtaining a parallel-polarized image of a skin area;
- obtaining a cross-polarized image of the skin area;
- generating a difference image from the parallel and cross-polarized images;
- determining at least one portion of the difference image representative of a corresponding at least one portion of the skin area exhibiting uniform reflectance, wherein the at least one portion of the skin area exhibiting uniform reflectance corresponds to at least one portion of the difference image having an intensity less than a threshold intensity;
- determining an oiliness metric based on the at least one portion of the skin area exhibiting uniform reflectance as having skin surface oil, the oiliness metric being indicative of a skin surface oil quantity, including determining an average intensity of pixels of the difference image having intensities less than the threshold intensity;
- and
- outputting an indication of the oiliness metric.
4 more elements
An apparatus comprising:
- a storage device configured to store instructions;
- and
- a processor configured to execute instructions stored in the storage device to:
- obtain a parallel-polarized image of a skin area;
- obtain a cross-polarized image of the skin area;
- generate a difference image from the parallel and cross-polarized images;
- determine at least one portion of the difference image representative of a corresponding at least one portion of the skin area exhibiting uniform reflectance wherein the at least one portion of the skin area exhibiting uniform reflectance corresponds to at least one portion of the difference image having an intensity less than a threshold intensity;
- determine an oiliness metric based on the at least one portion of the skin area exhibiting uniform reflectance as having skin surface oil, the oiliness metric being indicative of a skin surface oil quantity, including determining an average intensity of pixels of the difference image having intensities less than the threshold intensity;
- and
- output an indication of the oiliness metric.
7 more elements
A method comprising:
- obtaining a parallel-polarized image of a skin area;
- obtaining a cross-polarized image of the skin area;
- generating a difference image from the parallel and cross-polarized images;
- determining at least one portion of the difference image representative of a corresponding at least one portion of the skin area exhibiting specular reflectance, including determining at least one portion of the difference image having an intensity greater than a threshold intensity;
- determining at least one portion of the difference image representative of a corresponding at least one portion of the skin area exhibiting uniform reflectance, including determining at least one portion of the difference image having an intensity less than the threshold intensity;
- determining an oiliness metric based on the at least one portion of the skin area exhibiting uniform reflectance as having skin surface oil, the oiliness metric being indicative of a skin surface oil quantity, including determining:
- (i) an average intensity of said pixels of the difference image having intensities greater than the threshold intensity, and (ii) an average intensity of pixels of the difference image having intensities less than the threshold intensity;
- and
- outputting an indication of the oiliness metric.
6 more elements
An apparatus comprising:
- a storage device configured to store instructions;
- and
- a processor configured to execute instructions stored in the storage device to:
- obtain a parallel-polarized image of a skin area;
- obtain a cross-polarized image of the skin area;
- generate a difference image from the parallel and cross-polarized images;
- determine at least one portion of the difference image representative of a corresponding at least one portion of the skin area exhibiting specular reflectance, including determining at least one portion of the difference image having an intensity greater than a threshold intensity;
- determine at least one portion of the difference image representative of a corresponding at least one portion of the skin area exhibiting uniform reflectance including determining at least one portion of the difference image having an intensity less than the threshold intensity;
- determine an oiliness metric based on the at least one portion of the skin area exhibiting uniform reflectance as having skin surface oil, the oiliness metric being indicative of a skin surface oil quantity, including determining:
- (i) an average intensity of said pixels of the difference image having intensities greater than the threshold intensity, and (ii) an average intensity of pixels of the difference image having intensities less than the threshold intensity;
- and
- output an indication of the oiliness metric.
9 more elements
Dependencies are inferred from the claim text.