METHOD FOR DETERMINING A GREYNESS LEVEL OF A STRAND OF HAIR
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United States of America
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Issued Date -
Mar 3, 2022
app pub date -
Dec 17, 2019
filing date -
Dec 17, 2019
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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.
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