US Patent 10922576 Hair curl measurement

A method of measuring indications of hair type of a user, the method comprising the steps of: providing a mobile device; providing a reference card, the reference card including one or more reference markers; providing one or more of the user's hairs at the 5 surface of the reference card; acquiring one or more images of said one or more hairs using the mobile device; identifying the path of each of the one or more hairs along the reference card; and calculating the curve of each hair from its identified path.