SYSTEM AND METHOD FOR AUTOMATED HAIRSTYLE PROCESSING AND HAIR CUTTING DEVICE
20190047162 ยท 2019-02-14
Inventors
- Cornelis Johannes Zandsteeg (Eindhoven, NL)
- Raymon Henk Uit De Bulten (Eindhoven, NL)
- Lolke Klaas Salverda (Eindhoven, NL)
Cpc classification
International classification
Abstract
The present disclosure relates to an automated hairstyle processing method, an an automated hairstyle processing system, and an automated hair cutting device, the system (10) comprising a memory unit (48) arranged to store a predefined hairstyle model (90) including hair property representing values and body shape representing values, particularly head shape representing values, a sampling unit (76) arranged to sample an actual body shape portion, particularly an actual head shape, of a to be treated subject (12), involving detecting deviations from a model body shape portion of the predefined hairstyle model, a processing unit (42) arranged to adapt a hair property model (94) of the predefined hairstyle model, in case deviations between the actual body shape and the model body shape portion are detected, so as to compensate the actual body shape deviations, the adaptions to the hair property model (94) being local adaptations.
Claims
1. A method of automated hairstyle processing comprising the following steps: providing a predefined hairstyle model including hair property representing values and body shape representing values, particularly head shape representing values, sampling an actual body shape portion, particularly an actual head shape, of a to be treated subject, involving detecting deviations from a model body shape portion of the predefined hairstyle model, and in case deviations between the actual body shape and the model body shape portion are detect, adapting a hair property model of the predefined hairstyle model so as to compensate the actual body shape deviations; wherein the step of adapting the hair property model involves a local adjustment of the hair property model.
2. The method as claimed in claim 1, wherein the step of detecting deviations of the actual body shape portion from the model body shape portion of the predefined hairstyle model involves detecting considerable deviations that exceed a defined range or threshold, and wherein the step of adapting the hair property model of the predefined hairstyle model is performed when considerable deviations are present.
3. The method as claimed in claim 1, wherein an overall appearance of a processed haircut is maintained within an accepted tolerance level by adapting the hair property representing values of the hairstyle model.
4. The method as claimed in claim 1, wherein the predefined hairstyle model includes a topological hair model including a set of data points involving position values and hair property values, particularly hair length values.
5. The method as claimed in claim 1, wherein the step of adapting the hair property model comprises at least one of the following steps: in case depressed features with respect to the model body shape portion are detected, adding a compensating offset to involved hair property representing values, particularly hair length values, in case elevated features with respect to the model body shape portion are detected, deducting a compensating offset from involved hair property representing values, particularly hair length values, and in case displaced features or unsymmetrical features at respective sides of the skin or head are detected, adding a relocating offset to involved hair property representing values, particularly hair length values or hair presence values.
6. The method as claimed in claim 1, wherein the step of sampling the actual body shape is performed when the hair of the to be treated subject is processed, and wherein an in-process adaption of the hair property model is performed.
7. The method as claimed in claim 1, wherein the sampled actual body shape is used for an adaption of the hair property model for a subsequent hair processing operation.
8. The method as claimed in claim 1, wherein the step of sampling the actual body shape is performed in a sampling mode, preferably prior to a subsequent hair processing operation in which an adapted hair property model is used.
9. The method as claimed in claim 7, wherein an iteration procedure is performed involving a repetitive refinement of the body shape sampling and the hair property model adaption.
10. The method as claimed in claim 1, wherein the step of sampling the actual body shape involves providing a position indicating section that is arranged, when moved in an arbitrary and/or targeted fashion, to record a point cloud representing the outer shape of a skin portion of a part of the body of the to be treated subject.
11. A system for automated hairstyle processing, the system comprising: a memory unit arranged to store a predefined hairstyle model including hair property representing values and body shape representing values, particularly head shape representing values, a sampling unit arranged to sample an actual body shape portion, particularly an actual head shape, of a to be treated subject, a processing unit arranged to detect deviations from a model body shape portion of the predefined hairstyle model, and to adapt a hair property model of the predefined hairstyle model, in case deviations between the actual body shape and the model body shape portion are detected, so as to compensate the actual body shape deviations according to claim 1.
12. The system as claimed in claim 11, further comprising a position determination unit that is arranged to record a point cloud representing the outer shape of a skin portion of a part of the body of the to be treated subject.
13. An automated hair cutting device, particularly a hand-held device, comprising: an engagement section arranged to engage a haired portion of a subject of interest, a cutting length adjustment section, a position indicating section, and a control interface arranged to communicate with a processing unit wherein the control interface is operable to exchange operational data, the operational data comprising hair property representing values, particularly hair length values, and body shape representing values, wherein the cutting length adjustment section is operable based on the operational data so as to define an actual cutting length in accordance with the predefined hairstyle model, wherein the position indicating section is operable to detect an actual position of the device based on which a data representation of an outer body shape of the subject may be obtained, and wherein, in case deviations between the actual body shape and the model body shape portion are detected, the cutting length adjustment section is operable based on adapted operational data so as to compensate the actual body shape deviations by providing a local adjustment of the operational data.
14. Computer program comprising program code means for causing a computer to carry out the steps of the method as claimed in claim 1 when said computer program is carried out on a computing device.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0064] These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter. In the following drawings
[0065]
[0066]
[0067]
[0068]
[0069]
[0070]
[0071]
[0072]
[0073]
[0074]
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0075]
[0076] As already indicated further above, the present disclosure generally relates to grooming, processing and styling human hair and animal hair which involves head hair and body hair.
[0077] The system 10 comprises a hair cutting device 20 which may be also referred to as automated hair cutting device. The device 20 is arranged as a hand-held or hand-guided device. The device 20 may be basically arranged as a hair cutting appliance which is supplemented by additional processing and control capabilities. Generally, the device 20 may be grasped by a user and operated so as to cut hair at the subject 12. This may involve moving the device 20 through the haired portion 16 at the head portion 14 of the subject 12 and cutting hairs to a desired length.
[0078] The device 20 may be held and operated by the subject 12 itself (whose haircut is to be processed). In the alternative, the device 20 may be operated by another individual. The operator of the hand-held device 20 shall be referred to hereinafter as the user.
[0079] The device 20 comprises a blade set 22 which is not explicitly shown in
[0080] The system 10 further comprises a position determination unit 30 which may be also referred to as tracking unit or position detection unit. The position determination unit 30 is indicated in
[0081] As exemplarily shown in
[0082] Further, user feedback units 44, 46 may be provided so as to establish an interaction between the user and the hair cutting device 20 via the computing device 40. For instance, the user feedback units may comprise a display or screen 44 and speakers 46. The computing device 40 may further comprise a memory unit 48 which may be arranged to store hairstyle and/or haircut models. Further operational data may be stored in the memory unit 48. In
[0083] As will be discussed further below, the hair cutting device 20 and the computing device 40 are preferably arranged to exchange data therebetween. This may for instance involve a wireless and/or a cable communication.
[0084] There are further embodiments of the system 10 wherein the hair cutting device 20 as such provides sufficient computing capacity. However, also if this is the case, providing the computing device 40 may be beneficial for a setup and further configuration operations.
[0085]
[0086] In
[0087] In some embodiments, the position indicating section 60 is operable to cooperate with a positional reference 32. In
[0088] The device 20 further comprises a control interface 62 through which data and information may be exchanged. In one embodiment of the system 10, the device 20, the position determination unit 30 and the computing device 40 (refer also to
[0089] Hence, a sampling unit 74 of the computing device 40 may be supplied with samples which involve the actual position of the device 20 with respect to the positional reference 32 and, consequently, with respect to the subject 12. Hence, by moving the device 20 along and in close proximity to the head of the subject 12, a virtual data representation of the actual shape thereof may be obtained. In other words, assuming that a certain sampling rate is used, a point cloud, data mash or data set may be generated which represents the shape of at least a part of the head 14.
[0090] The computing device 40 as shown in
[0091] In case the deviation detection unit 76 detects a significant deviation, for instance a considerable protrusion or depression at the scalp of the subject 12, the model adaption unit 70 may adapt the hairstyle model accordingly so as to ensure the desired overall appearance and accuracy of the haircut.
[0092] The computing device 40 of
[0093] The arrangement of
[0094] Needless to say, remote position sensors as illustrated in
[0095]
[0096] The hairstyle model 90 involves a scalp or head model 92 describing a model shape of the subject 12, i.e. at the level of the skin or scalp. The hairstyle or haircut model 90 further involves a hair length model 94 which may be also referred to as hair property model. The hair length model 94 involves respective hair length values associated with respective positions at the model 92 representing a skin or scalp contour of the subject 12. The scalp model 92 and the hair length model 94 jointly form the hairstyle model 90. Hence, when performing a hair cutting operation, the position determination unit 30 (
[0097]
[0098] As indicated above, the scalp model 92 does not necessarily match an actual individual. Rather, the scalp model 92 may represent a predefined model corresponding to another individual or to a fictional standard person.
[0099] However, it has been observed that in many individuals considerable deviations of the head or scalp shape are present. An actual scalp shape of the individual shown in
[0100] Assuming that the predefined hairstyle model 90 is imposed on the actual individual without compensating the deviation 110, a respective deviation would be also present at the processed haircut as the depression 112 would be reflected in a corresponding hairstyle imperfection.
[0101] Therefore, in accordance with at least some embodiments and aspects of the present disclosure, it is proposed to detect respective deviations so as to obtain an actual scalp shape based on which the predefined hairstyle model may be adjusted so as to ensure that the resulting haircut can be achieved at the desired accuracy and appearance.
[0102] With reference to
[0103] The chart of
[0104] In
[0105] In the predefined hairstyle model 90 illustrated in
[0106] The actual hairstyle model 130 of
[0107] As further indicated in
[0108] The compensation approach illustrated in
[0109] However, further types of deviations may be present. In this context, reference is made to
[0110] Basically the same may apply to unsymmetrical features which may for instance involve a left ear and a right ear that are arranged at a different height level at the head of one and the same individual.
[0111] Generally, a relocating offset 150 may be derived and applied to the hairstyle model which may for instance trigger a relocation of a model hairline.
[0112] Reference is made to
[0113] The method involves a first step S10 which includes providing a hairstyle or haircut model for a hair cutting operation. The hairstyle model involves a combined scalp and hair length model defining position-dependent hair length values. The hairstyle model may be provided from a memory unit, step S12. In the alternative, the hairstyle model may be obtained from a cloud or online environment, step S14.
[0114] The method may further involve a step S16 which includes detecting a current position of a hand-held device with respect to a body portion of interest of a to-be-treated subject. A sampling step S18 may follow which includes sampling a large number of position values which may result in a point cloud which generates a representation of at least a portion of the head or scalp of the subject.
[0115] In yet another step S20, deviations between the detected actual head model and a head model underlying the predefined hairstyle model are detected. The deviations may for instance involve depressions, elevations, dislocated features, asymmetric features, etc.
[0116] A decision step S22 may follow which includes an assessment as to whether or not the detected deviations are within a defined (allowed) range. In case the deviations exceed the defined range or threshold, an adaption step S24 may follow. Consequently, the hairstyle model may be adapted to current conditions, particularly to an actual head or scalp shape. The adapted model may be stored in the memory unit, step S26, or may be distributed via a cloud or online environment, step S28.
[0117] A further step S30 involves the hair processing or hair cutting operation as such. Automated hair cutting involves so-called smart hair cutting devices which are arranged to adapt or adjust the current hair length dependent on an actual position of the device, for instance by operating a motorized spacing comb. Therefore, also an unexperienced or non-professional user may achieve haircuts and hairstyles at a considerably impressive quality level.
[0118] In the step S30, the adapted model processed in a step S24 may be used. When it is assessed in the decision step S22 that the deviations are small enough so that no adaption of the hairstyle model is required, the adaption step S24 may be bypassed.
[0119] As indicated by a dashed arrow connecting the blocks for the steps S30 and S16, the hairstyle model adaptation may be an iterative process. For instance, when one and the same individual is treated several times, allowed deviations from the predefined contour or shape model may be gradually reduced so as to further improve the hairstyle appearance.
[0120]
[0121] In
[0122] In the alternative or in addition, a step S52 may be provided which involves the generation of a hairstyle model by another individual whose hair is styled. Both generic models as provided by the step S50 and individual models as provided by the step S52 may form a basis for a model adaption procedure as discussed herein.
[0123] For instance, the models provided by the steps S50 and S52 may be distributed via a cloud environment, step S54. The models may be downloaded or otherwise stored in a memory unit, step S56. A further subsequent step S58 involves selecting and providing a respective hairstyle model for a planned hairstyling operation.
[0124] A further step S60 may follow which involves a model adaption to a certain individual. As already discussed above, the model adaption may involve a detection of the individual's head or scalp shape and, consequently, a match of the predefined shape and the individual's shape. In case significant deviations are detected, an adaption and adjustment action may take place.
[0125] The adapted model may be stored in a memory unit, step S62. Further, the adapted model may be distributed via an online or cloud environment, step S64.
[0126] A further step S66 involves the desired hair processing operation which is based on the adapted model. As indicated by a dashed line that connects the boxes indicating the steps S60 and S66, also the hair processing operation may be used to further refine and adapt the underlying hairstyle model.
[0127] While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.
[0128] In the claims, the word comprising does not exclude other elements or steps, and the indefinite article a or an does not exclude a plurality. A single element or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
[0129] A computer program may be stored/distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with or as part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems.
[0130] Any reference signs in the claims should not be construed as limiting the scope.