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US 11,231,366 B2Granted
Method and device for determining a gloss value of hair
AssigneeHenkel AG & Co. KGaA
InventorsBurkhard Mueller, Torsten Lechner
Life of this patent
Estimating the term…
Abstract
In various exemplary embodiments, a device for determining the gloss value of hair is provided. The device includes a light source for illuminating at least one hair with light, where the at least one hair is arranged to extend along a cylinder section-like carrier in such a way that a plurality of adjacent hair sections is arranged essentially perpendicular to a cylinder axis. The device further includes a portable camera for capturing a digital image of the at least one hair during illumination and a portable electronic data processing device for determining a gloss value of the hair based on the digital image.
Claims14
A method for determining a suggested hair care product for gloss enhancement of hair, comprising:
- illuminating at least one hair with light, wherein said at least one hair is arranged to extend along a cylinder support with a plurality of adjacent hair sections arranged perpendicular to a cylinder axis;
- during illumination, capturing a digital image of the at least one hair by a portable camera;
- determining, via a processor, a gloss value of the hair from a multi-stage gloss scale based on a brightness of the digital image, by examination of the digital image that includes transforming the digital image into a color space that includes a brightness parameter;
- determining, via the processor, the suggested hair care product for gloss enhancement from a plurality of hair care products for gloss enhancement, wherein each of the plurality of hair care products for gloss enhancement has an associated gloss enhancement level, and wherein determining of the suggested hair care product for gloss enhancement is based on the determined gloss value, and wherein a hair care product with a higher gloss generation level is suggested for hair with a lower gloss value;
- and
- outputting, via an output device, the suggested hair care product for gloss enhancement, via instructions provided to the output device by the processor;
- wherein:
- the light is linearly polarized, with an oscillation plane of the polarized light running along the cylinder axis;
- the step of determining the gloss value of the hair comprises determining the gloss value of the hair based on a brightness ratio of reflected to diffuse scatter of the digital image, and based on a table of known values of gloss values of hair correlated with brightness ratios of reflected to diffuse scatter;
- and
- the outputting comprises outputting, via instructions provided by the processor to a display screen of a smart phone, the suggested hair care product for gloss enhancement.
8 more elements
A device for determining a suggested hair care product for gloss enhancement of hair, comprising:
- a light source for illuminating at least one hair with light, wherein the at least one hair is arranged extending along a cylinder support with a plurality of hair sections arranged side by side are perpendicular to a cylinder axis;
- a portable camera for capturing a digital image of the at least one hair during illumination;
- an output device;
- and
- a portable electronic data processing device configured to:
- determine a gloss value of the hair from a multi-stage gloss scale based on a brightness of the digital image by examination of the digital image that includes transforming the digital image into a color space that includes a brightness parameter;
- determine the suggested hair care product for gloss enhancement from a plurality of hair care products for gloss enhancement, wherein each of the plurality of hair care products for gloss enhancement has an associated gloss enhancement level, and wherein determining of the suggested hair care product for gloss enhancement is based on the determined gloss value, and wherein a hair care product with a higher gloss generation level is suggested for hair with a lower gloss value;
- and
- provide instructions for outputting, to the output device, the suggested hair care product for gloss enhancement;
- wherein the output device is configured to output the suggested hair care product for gloss enhancement in accordance with the instructions provided to the output device by the processor;
- wherein the light emitted from the light source is linearly polarized, with an oscillation plane of the polarized light running along the cylinder axis;
- and
- wherein the portable electronic data processing device is configured to:
- determine the gloss value of the hair based on a brightness ratio of reflected to diffuse scatter of the digital image, and based on a table of known values of gloss values of hair correlated with brightness ratios of reflected to diffuse scatter;
- and
- provide the instructions for outputting, to a display screen of a smart phone, the suggested hair care product for gloss enhancement.
13 more elements
Dependencies are inferred from the claim text.