CN110349202B - Hairstyle design method based on face analysis - Google Patents

Hairstyle design method based on face analysis Download PDF

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CN110349202B
CN110349202B CN201910605576.3A CN201910605576A CN110349202B CN 110349202 B CN110349202 B CN 110349202B CN 201910605576 A CN201910605576 A CN 201910605576A CN 110349202 B CN110349202 B CN 110349202B
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hair style
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灏规捣
尹海
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Hefei Jumei Network Technology Co ltd
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    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D44/00—Other cosmetic or toiletry articles, e.g. for hairdressers' rooms
    • A45D44/005—Other cosmetic or toiletry articles, e.g. for hairdressers' rooms for selecting or displaying personal cosmetic colours or hairstyle
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/50—Information retrieval; Database structures therefor; File system structures therefor of still image data
    • G06F16/58—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
    • G06F16/583—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually using metadata automatically derived from the content
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/60—Analysis of geometric attributes
    • G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/60—Analysis of geometric attributes
    • G06T7/68—Analysis of geometric attributes of symmetry
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/16—Human faces, e.g. facial parts, sketches or expressions
    • G06V40/168—Feature extraction; Face representation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30196—Human being; Person
    • G06T2207/30201—Face

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Abstract

The invention relates to a hairstyle design method based on face analysis, which belongs to the technical field of hairstyle design, wherein the method analyzes the face of a person to obtain the face characteristic value of each person, and screens a plurality of hairstyle graphs which are the same as the face of the user and have the closest face characteristic value through the face characteristic value of a picture in a face library to form a picture set for the user to select; the invention adopts the proportion of the upper court, the middle court and the lower court in the whole face as the weight for the first time, and quantifies the face by analyzing the forehead characteristic, the cheek characteristic and the lower jaw characteristic, thereby overcoming the deviation caused by sensory judgment; the hairstyle picture screened by the invention is matched with the face of the user, so that the matching degree is higher and the matching effect is better.

Description

Hairstyle design method based on face analysis
Technical Field
The invention belongs to the technical field of hairstyle design, and particularly relates to a hairstyle design method based on facial analysis.
Background
Hair styling is a comprehensive art that takes advantage of hair length, angle, color matching, and the designer's preferences and habits. At present, the work of designing the hair style is mainly completed by a hairdresser, the designed hair style is different due to different preferences and habits of different hairdressers, and if the preferences and habits of the hairdresser are inconsistent with the habits of a user, the designed hair style obviously cannot meet the requirements of the user.
At present, when a user selects to change his own hair style, the user often visually judges and selects by looking at an atlas, but the atlas is of a model face shape, and the hair styles are beautiful on the atlas, but only can be explained to be suitable for the model on the atlas, but not for himself. This is why the user often fails to cut the hair style after selecting his/her favorite hair style through the album, and the user can not get around the strange circle of 'cutting the head three days ugly'.
In addition, some hair stylists can perform hair style design according to the atlas and the conditions of the user, in this case, the final effect of the cut-out can be generally appreciated by the user, but when introducing the design concept of the hair stylists, the user is in a blank state, cannot imagine how the final effect is, and cannot give the hair stylists their hair with complete confidence.
In order to enable a user to visually understand a hairstyle to be trimmed, a plurality of hairstyle design software has been developed, and the software has a respective hairstyle library and can match the hairstyle drawings with the face images.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a hairstyle designing method based on a face analysis.
The invention realizes the purpose through the following technical scheme:
a hair style design method based on face analysis comprises the following steps:
s1, acquiring a face image of a user with an exposed forehead on the front side, and judging the face shape of the user;
s2, carrying out face feature analysis on the face image of the user, and calculating a face feature value;
and S3, screening from a preset hair style library according to the face characteristic value, selecting a plurality of hair style graphs which have the same face shape as the user and are closest to the face characteristic value, and forming a picture set for the user to select.
Further preferably, the method for performing facial feature analysis on the user face image and calculating a facial feature value in step S2 includes the steps of:
s2.1, extracting the face in the face image of the user, correcting the face in the current image by taking the center line of the right middle part above the upper lip as a Y-axis baseline of the image to ensure that the left face and the right face are symmetrical to obtain a right face image, carrying out contour recognition on the right face image, and displaying the recognized face contour line on the right face image;
s2.2, extracting characteristic points of the frontal face image, including a midpoint a of a connecting line of the left and right eyebrow center points1With a1Intersection a of the X-axis line as the base point and the face contour line2、a3Upper end point b of human midline1In b with1Intersection b of X-axis line as base point and face contour line2、b3，a1And b1Midpoint c of connecting line1In addition to c1Intersection c of the X-axis line as the base point and the face contour line2、c3And the intersection d of the face contour line and the Y-axis base line1、d2(ii) a Wherein, with b1、c1Dividing the frontal face image into an upper court, an atrium and a lower court from top to bottom by an X-axis line serving as a base point;
step S2.3, calculating the areas S of an upper court, an atrium and a lower court1、S2、S3And its ratio omega in the whole facex：
Figure BDA0002120682500000031
S2.4, calculating face characteristic parameter values including forehead characteristic parameter value Z1Cheek feature parameter value Z2Value Z of characteristic parameter of lower jaw3。
S2.5, the ratio omega of the upper court, the middle court and the lower court in the whole face shapexCalculating the face characteristic value W omega by combining the face characteristic parameter value for weighting1Z1+ω2Z2+ω3Z3。
Further preferably, the forehead characteristic parameter Z1Cheek characteristic parameter Z2Characteristic of the lower jaw Z3And satisfies the following conditions:
Figure BDA0002120682500000032
Figure BDA0002120682500000033
Figure BDA0002120682500000034
wherein L represents a length.
Further preferably, the data information in the preset hair style library of step S3 includes: the face image and the hair style chart of the user or the model exposed out of the forehead, the face shape and the face characteristic value of the user or the model are collected in the front.
Further preferably, the step S3 further includes integrating the face image of the user and the selected photo album image to form a hair style album for the user to select.
The invention has the beneficial effects that:
1) according to the method, the face shape of each person is analyzed, the face shape characteristic value of each person is obtained, and a hairstyle graph closest to the face shape of the user is screened for the user to select through the face shape characteristic value of the picture in the face shape library, so that the method is more specific;
2) the invention adopts the proportion of the upper court, the middle court and the lower court in the whole face as the weight for the first time, and quantifies the face by analyzing the forehead characteristic, the cheek characteristic and the lower jaw characteristic, thereby overcoming the deviation caused by sensory judgment;
3) when the hairstyle atlas screened by the method is matched with the face of the user, the matching degree is high, and the matching effect is good;
4) by incorporating the hairstyle of the user into the hairstyle library, the data of the hairstyle library can be updated adaptively, compared with the hairstyle library constructed only for standard faces such as models, the user can see more unmodified real images, and compared with an atlas shot by the models, the hairstyle library has more impression of corners.
Drawings
FIG. 1 is a flow chart of a design method of the present invention;
FIG. 2 is a schematic diagram of feature points of a face image
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
The embodiment provides an intelligent hair style design method based on face analysis, as shown in fig. 1, including the following steps:
s1, acquiring a face image of a user with an exposed forehead on the front side, and judging the face shape of the user;
s2, carrying out face feature analysis on the face image of the user, and calculating a face feature value, wherein the face feature value comprises the following steps:
s2.1, extracting the face in the face image of the user, correcting the face in the current image by taking the center line of the right middle part above the upper lip as a Y-axis baseline of the image to ensure that the left face and the right face are symmetrical to obtain a right face image, carrying out contour recognition on the right face image, and displaying the recognized face contour line on the right face image; under the condition that the identification is not accurate enough, manual adjustment can be carried out;
s2.2, extracting the feature points of the frontal face image, as shown in FIG. 2, including the midpoint a of the connecting line of the left and right eyebrow center points1With a1Intersection a of the X-axis line as the base point and the face contour line2、a3Upper end point b of human midline1In b with1Intersection b of X-axis line as base point and face contour line2、b3，a1And b1Midpoint c of connecting line1In addition to c1Intersection c of the X-axis line as the base point and the face contour line2、c3And the intersection d of the face contour line and the Y-axis base line1、d2(ii) a Wherein, with b1、c1Dividing the frontal face image into an upper court, an atrium and a lower court from top to bottom by an X-axis line serving as a base point;
step S2.3, calculating the areas S of an upper court, an atrium and a lower court1、S2、S3And its occupation in the whole faceRatio omegax：
Figure BDA0002120682500000051
S2.4, calculating a face characteristic parameter value, comprising the following steps:
(1) characteristic parameter value Z of forehead1And satisfies the following conditions:
Figure BDA0002120682500000061
the forehead characteristic parameter reflects the length of the forehead occupying the whole face and the forehead width, Z1The larger the value, the forehead is pointed and elongated, Z1The smaller the value is, the forehead is in a wide and short type;
(2) cheek feature parameter value Z2And satisfies the following conditions:
Figure BDA0002120682500000062
cheek feature parameter reflects cheek width, Z2The larger the value, the wider the cheek, Z2The smaller the value, the sharp cheek is indicated;
(3) value of characteristic parameter of jaw Z3And satisfies the following conditions:
Figure BDA0002120682500000063
the characteristic parameters of the lower jaw reflect the sharpness, Z, of the lower jaw3The larger the value, the longer the mandible is, Z3The smaller the value, the shorter the jaw is;
wherein L represents a length.
S2.5, calculating a face characteristic value W:
W＝ω1Z1+ω2Z2+ω3Z3
s3, screening from a preset hairstyle library according to the face characteristic value, and selecting a plurality of hairstyle graphs which are the same as the face of the user and have the closest face characteristic value to form a picture set; the preset hair style library comprises a face image of the frontal exposed forehead of a user or a model, a hair style graph of the user or the model, the face of the user or the model and a face characteristic value of the user or the model; and finally, integrating the face image of the user and the selected picture set image to form a hair style atlas for the user to select.
S4, a hairdresser trims and shapes the hair style according to the hair style selected by the user; if the user satisfaction of the shaped hair style is high, the facial image of the user and the related parameters (including the face shape and the facial feature values) thereof acquired in steps S1 and S2 and the shaped hair style map obtained in step S3 may be included in the hair style library for other users to refer to and select.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (3)

1. A hair style design method based on face analysis is characterized by comprising the following steps:
s1, acquiring a face image of a user with an exposed forehead on the front side, and judging the face shape of the user;
s2, carrying out face feature analysis on the face image of the user, and calculating a face feature value;
s3, screening from a preset hairstyle library according to the face characteristic value, selecting a plurality of hairstyle graphs which are the same as the face of the user and have the closest face characteristic value to form a picture set for the user to select;
s4, a hairdresser trims and shapes the hair style according to the hair style selected by the user; if the user satisfaction of the shaped hair style is high, the facial image of the user and the related parameters thereof acquired in steps S1 and S2 and the shaped hair style diagram can be included in the hair style library of step S3 for other users to refer to and select under the condition that the user agrees;
the method for performing face feature analysis on the user face image and calculating the face feature value in step S2 includes the steps of:
s2.1, extracting the face in the face image of the user, correcting the face in the current image by taking the center line of the right middle part above the upper lip as a Y-axis baseline of the image to ensure that the left face and the right face are symmetrical to obtain a right face image, carrying out contour recognition on the right face image, and displaying the recognized face contour line on the right face image;
s2.2, extracting characteristic points of the frontal face image, including a midpoint a of a connecting line of the left and right eyebrow center points1With a1Intersection a of the X-axis line as the base point and the face contour line2、a3Upper end point b of human midline1In b with1Intersection b of X-axis line as base point and face contour line2、b3，a1And b1Midpoint c of connecting line1In addition to c1Intersection c of the X-axis line as the base point and the face contour line2、c3And the intersection d of the face contour line and the Y-axis base line1、d2(ii) a Wherein, with b1、c1Dividing the frontal face image into an upper court, an atrium and a lower court from top to bottom by an X-axis line serving as a base point;
step S2.3, calculating the areas S of an upper court, an atrium and a lower court1、S2、S3And its ratio omega in the whole facex：
Figure FDA0003052532740000021
S2.4, calculating face characteristic parameter values including forehead characteristic parameter value Z1Cheek feature parameter value Z2Value Z of characteristic parameter of lower jaw3；
S2.5, the ratio omega of the upper court, the middle court and the lower court in the whole face shapexIs a weight, knotCalculating the face characteristic value W-omega by combining the face characteristic parameter values1Z1+ω2Z2+ω3Z3；
Characteristic parameter of forehead Z1Cheek characteristic parameter Z2Characteristic of the lower jaw Z3And satisfies the following conditions:
Figure FDA0003052532740000022
Figure FDA0003052532740000023
Figure FDA0003052532740000024
wherein L represents a length.
2. The method for designing a hair style based on the face analysis as claimed in claim 1, wherein the data information in the preset hair style library of step S3 comprises: the face image of the frontal exposed forehead of the user or the model, the hair style chart of the user or the model, the face shape of the user or the model and the face characteristic value of the user or the model.
3. The method for designing a hair style based on the face analysis of claim 1, wherein the step S3 further comprises integrating the face image of the user and the selected photo set image to form a hair style album for the user to select.
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