Abstract: A method and device for determining the color homogeneity of hair is provided. In accordance with various exemplary embodiments, a method comprises providing a digital image in which hair is depicted and which is parameterized in a color space which is defined by employing a parameter set in which one of the parameters is a hue, defining at least one hair analysis region in the digital image, determining a hue distribution in at least one hair analysis region, and determining at least one color homogeneity value on the basis of the determined hue distribution.

Abstract: Methods for determining the straightness value of a hairstyle are provided. In accordance with an embodiment, a method comprises: defining at least one hair analysis region in a digital image in which hair is depicted; ascertaining hair profiles of the hair depicted in the at least one hair analysis region, wherein the hair profiles of all hair depicted in the hair analysis region form a totality of the hair profiles; ascertaining a main direction of the hair profiles; and ascertaining the straightness value of the hairstyle on the basis of the main direction of the hair profiles and the totality of hair profiles.

Abstract: In various exemplary embodiments, a method for computer-aided hair color counseling is provided. The method may comprise: recording a digital image of hair of a user and additional objects by employing a camera, identifying a hair region area in the digital image in which the hair is depicted, identifying a new hair color, aligning a hair projection region in which the hair is projected, of a transparent or reflecting screen or a system of screen and one-way mirror in a manner such that, to an observer of the screen, a combination of the objects transmitted or reflected by the screen is produced with the hair projection region, wherein the hair projection region is aligned in a manner such that it essentially covers a hair transmission/reflection region in which to the observer, the transmitted or reflected user's hair would appear, and projecting the hair projection region in the new hair color.

Abstract: A method for computer-assisted determination of a cosmetic product is provided.

Abstract: A method for determining a hair colouring result of a hair dye for dyeing hair involves determining, for each partial area of a hair region of hair to be dyed, a value for a first initial state parameter and for a second initial state parameter in the particular partial area. The first initial state parameter contains information concerning a hair state and the second initial state parameter contains information regarding a hair colour. The first initial state parameter and the second initial state parameter describe an initial colour state of the hair to be dyed in the partial area. The method further involves determining the initial colour state of the hair to be dyed for the hair region and computer-assisted determination, for a particular hair dye, of a forecast hair colouring result for the hair in the hair region, taking into consideration the determined initial colour state of the hair in the hair region.

Abstract: A method for determining a body area condition is provided. The method may includes determining at least one body condition parameter and determining the body area condition using the at least one body condition parameter. The determining of the body condition parameter includes recording, during a sequential exposing of a body area of a user to light of different colors by a display of a portable data processing device, a plurality of images of at least a part of the light which has interacted with the body area, determining a spectral characteristic of the body area by the plurality of images, comparing the spectral characteristic with calibration spectral characteristics obtained for a plurality of calibration body areas, and determining the body condition parameter including a result of the comparison.

Abstract: A hair treatment system is provided and may comprise a sensor device having at least one condition sensor for capturing a hair condition parameter and/or an environmental parameter, and an electrical hair treatment device. The hair treatment device may comprise an application device for applying a hair treatment agent to the hair, a hair treatment unit, and an electronic circuit device, wherein the electronic circuit device may be coupled to the sensor device in order to receive the captured hair condition parameter and/or the environmental parameter and/or a hair treatment parameter, and wherein the electronic circuit device may be configured to control the hair treatment on the basis of the received captured hair condition parameter and/or environmental parameter and/or hair treatment parameter, wherein the hair treatment may comprise an application of the hair treatment agent and a mechanical and/or thermal treatment by employing the hair treatment unit.

Abstract: In various embodiments, a method of providing a hair treatment agent is provided. The method can have a detecting of at least one sensor value on hair of a user by employing at least one portable sensor, a determining of a hair condition of the user by employing the detected at least one sensor value, a computer-assisted determining of a user-specific hair treatment agent including the determined hair condition, and a preparing of the determined user-specific hair treatment agent by employing a hair treatment agent mixing device.

Abstract: A method for determining a user-specific hair treatment by determining and inclusion of the degree of damage of hair is provided. To this end, initially, with the aid of near-infrared and/or infrared spectra of the keratin fibres of an individual, the amino acid oxidation product content is determined and a degree of damage is derived from it via a calibration model. Individual treatment advice that is based on the determined degree of damage is issued.

Abstract: A hair treatment agent is provided herein. The hair treatment agent includes in a cosmetic carrier (a) at least one compound of the general formula (I). R1 denotes a hydrogen atom or a structural element of formula (II). x denotes an integer from 1 to 100. The radical R2 in each of the structural elements of formula (II) can be selected independently of the preceding structural element of formula (II). M1 denotes the grouping —OM2 or a structural element of formula (III). y denotes an integer from 1 to 100. M2 denotes a hydrogen atom, an equivalent of one or more cations or an ammonia ion (NH4)+.

Abstract: A method for determining a degree of damage to hair is provided in the form of various embodiments. Said method can comprise the following steps: during the exposure of a hair sample to UV light (for example by employing a UV-LED), detecting fluorescence light emitted by the hair sample, determining a fluorescence intensity by employing the detected light, and determining the degree of damage to the hair using said fluorescence intensity.

Abstract: A method and device for determining the color homogeneity of hair is provided. In accordance with various exemplary embodiments, a method comprises providing a digital image in which hair is depicted and which is parameterized in a color space which is defined by employing a parameter set in which one of the parameters is a hue, defining at least one hair analysis region in the digital image, determining a hue distribution in at least one hair analysis region, and determining at least one color homogeneity value on the basis of the determined hue distribution.

Abstract: Methods for determining the straightness value of a hairstyle are provided. In accordance with an embodiment, a method comprises: defining at least one hair analysis region in a digital image in which hair is depicted; ascertaining hair profiles of the hair depicted in the at least one hair analysis region, wherein the hair profiles of all hair depicted in the hair analysis region form a totality of the hair profiles; ascertaining a main direction of the hair profiles; and ascertaining the straightness value of the hairstyle on the basis of the main direction of the hair profiles and the totality of hair profiles.

Abstract: The present disclosure relates to a method for determining a user-specific hair treatment with determination and inclusion of the degree of damage of the hair. To this end, the content of cysteic acid is firstly determined with the aid of near-infrared and/or infrared spectra of the keratin fibres of an individual and a degree of damage is derived via a calibration model. Individual treatment advice is output on the basis of the determined degree of damage.

Abstract: The present disclosure relates to hair treatment agents for reducing and/or preventing the bleeding and/or fading of artificially created hair colours, which agents comprise an aqueous cosmetic carrier, and (a) have a pH value ranging from about 3.5 to about 6.0, and (b) contain at least one alkaline earth salt of a dicarboxylic acid having from about 2 to about 8 C atoms. Further subjects of the present disclosure are a method and a multi-component packaging unit in which the aforesaid hair treatment agents are used. A further subject of the present disclosure is the use of a corresponding hair treatment agent for protecting the colour of dyed hair.

Abstract: A multicomponent packaging unit (kit of parts) for permanently changing the shape of keratinic fibers, in particular human hair, comprises the following packaged separately from one another: a container (i) containing a cosmetic agent (A), and a container (ii) containing a cosmetic agent (B), where agent (A) in container (i) contains at least one keratin-reducing compound, and agent (B) in container (ii) contains at least one compound of general formula (I) Also provides a method of using the kit and of using Bunte salts of formula (I) on hair.

Abstract: Disclosed is a method with different exemplary embodiments for determining a degree of damage to hair. Said method can comprise the following steps: during the exposure of a hair sample to near-infrared and/or infrared light, recording a spectrum of at least part of the near-infrared and/or infrared light that has interacted with the hair sample, comparing at least part of the spectrum with a spectroscopic calibration model obtained by near-infrared and/or infrared spectra and degrees of damage of a plurality of calibration hair samples, and determining the degree of damage to the hair using said comparison.

Abstract: Devices and methods for determining the thickness of hair are provided. An exemplary device includes a computing unit with a processor and a local memory. The processor is connected to the local memory and configured to read data from and/or to write data into the local memory. The device further includes a user input/output unit configured for interaction with a user. Also, the computing unit includes an image data input interface for receiving image data of at least one individual hair. The image data input interface is connected to the processor. Further, the computing unit includes a user interface connected to the user input/output unit and to the processor. The computing unit is configured to process the image data of the at least one individual hair to create hair thickness values of the at least one individual hair and to output the hair thickness values to the user interface.

Abstract: The present disclosure relates to a method for determining a user-specific hair treatment with determination and inclusion of the state of the hair. To this end, the content of at least one hair constituent is firstly determined with the aid of near-infrared and/or infrared and/or VIS and/or Raman spectra of the hair of an individual and a hair state is derived via a calibration model. Individual treatment advice is output on the basis of the determined hair state.

Abstract: A hair treatment agent is provided herein. The hair treatment agent includes in a cosmetic carrier (a) at least one compound of the general formula (I). R1 denotes a hydrogen atom or a structural element of formula (II). x denotes an integer from 1 to 100. The radical R2 in each of the structural elements of formula (II) can be selected independently of the preceding structural element of formula (II). M1 denotes the grouping —OM2 or a structural element of formula (III). y denotes an integer from 1 to 100. M2 denotes a hydrogen atom, an equivalent of one or more cations or an ammonia ion (NH4)+.