Camera with calibration device for hair analysis

US11369183B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Diane Metten · Goldkronach, DE
• Thorsten Knappe · Schenefeld, DE
• Anna Puls · Winsen, DE
• Rolf Bayersdoerfer · Hamburg, DE
• KATHARINA ROSCHER · Hamburg, DE

Key dates

• Filing date: Dec 12, 2017
• Grant date: Jun 28, 2022
• Expiry date: Jan 21, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J3/52
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Calibration devices for calibrating a camera, systems for computer-aided determination of hair colour information, and methods for calibrating a camera are provided herein. In an embodiment, a method for calibrating a camera includes recording a digital image of a piece of calibration information on a fibre from a plurality of fibres from natural hair or fibres that resemble natural hair by employing a camera. The fibre is identified in the digital image by employing a marker. A plurality of colour values are determined for a plurality of reference colours as the calibration information on the fibre in the digital image, wherein a reference colour value is assigned to each reference colour. The respective determined colour value for the plurality of the determined colour values is assigned to the respectively assigned reference colour value for the plurality of reference colour values.