Patent · US Active

Method for determining a greyness level of a strand of hair

US12121133B2 · kind B2 · utility

0Cited by

4References

19Claims

0Family size

Assignee

Henkel AG & Co. KGaA · DE

Inventors

Hans Georg Knuebel · Goldkronach, DE
Lucile Bonnin · Dressendorf, DE
Astrid Kroos · Monheim, DE

Key dates

Filing date	Dec 17, 2019
Grant date	Oct 22, 2024
Priority date	—
Expiry date	Oct 13, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/30196
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method for determining a greyness level of a strand of hair and a system adapted to implement this method are provided. First, an image of the strand of hair representing it according to a predefined representation standard is obtained. The image comprises a portion representing the strand of hair with pixels. Then, for each pixel of the portion, a luminance value is determined. After that an amount of pixels in the portion for which the determined luminance value is above a threshold luminance value is determined. Finally, the greyness level of the strand of hair is determined by estimating a ratio of the determined amount of pixels over a total amount of pixels in the portion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.