CN107280675B - Skin color detection method and device and depilation equipment - Google Patents
Skin color detection method and device and depilation equipment Download PDFInfo
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- CN107280675B CN107280675B CN201710364517.2A CN201710364517A CN107280675B CN 107280675 B CN107280675 B CN 107280675B CN 201710364517 A CN201710364517 A CN 201710364517A CN 107280675 B CN107280675 B CN 107280675B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/1032—Determining colour for diagnostic purposes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
Abstract
The invention belongs to the field of beauty care and provides a skin color detection method and device and depilating equipment. In the invention, the skin color detection method firstly emits white light to the skin of a target area if the skin is detected to be close to a skin depilating device, then obtains the light information of the target light of the white light after diffuse reflection of the skin of the target area, and finally determines the skin color information of the skin of the target area according to the light information of the target light. The invention can determine the skin color information of the skin of the target area according to the light information of the target light which is emitted to the skin of the target area and subjected to diffuse reflection of the skin of the target area.
Description
Technical Field
The invention belongs to the field of beauty care, and particularly relates to a skin color detection method and device and depilating equipment.
Background
In the field of beauty care technology, since existing depilating devices are strictly prohibited to be used on dark skin, when the depilating device is used, a human skin color needs to be detected to determine whether a user can safely use the depilating device.
The existing skin color detection system generally takes a picture of the skin of a target area through an image acquisition device such as a camera, performs image processing and mathematical analysis on the obtained picture, and performs approximate processing on the result to obtain the skin color information of a human body. However, the existing skin color detection system has complex algorithm and higher cost, and cannot be widely applied to small household appliances.
Therefore, the existing skin color detection system has the problems of complex algorithm and high cost.
Disclosure of Invention
The invention provides a skin color detection method, a skin color detection device and depilating equipment, and aims to solve the problems that an existing skin color detection system is complex in algorithm and high in cost.
A first aspect of the present invention provides a skin color detection method, where the skin color detection method includes:
emitting white light to the skin of the target area if skin is detected to be proximate to the skin epilation device;
acquiring light information of target light after the white light is subjected to diffuse reflection by the skin of the target area;
and determining the skin color information of the skin of the target area according to the light information of the target light.
A second aspect of the present invention provides a skin color detection apparatus, including:
the emitting module is used for emitting white light to the skin of the target area if the skin is detected to be close to the skin depilating device;
the acquisition module is used for acquiring the light information of the target light after the white light is subjected to diffuse reflection by the skin of the target area;
and the skin color determining module is used for determining the skin color information of the target area skin according to the light information of the target light.
A third aspect of the invention provides a skin epilation device comprising the above-described skin tone detection means.
In the invention, the skin color detection method firstly emits white light to the skin of a target area if the skin is detected to be close to a skin depilating device, then obtains the light information of the target light of the white light after diffuse reflection of the skin of the target area, and finally determines the skin color information of the skin of the target area according to the light information of the target light. The invention can determine the skin color information of the skin of the target area according to the light information of the target light which is emitted to the skin of the target area and subjected to diffuse reflection of the skin of the target area.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating an implementation of a skin color detection method according to an embodiment of the present invention;
fig. 2 is a block diagram of a skin color detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 shows an implementation flow of a skin color detection method provided by an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, which are detailed as follows:
as shown in fig. 1, a skin color detection method includes:
step S101: if skin is detected proximate to the skin epilation device, white light is emitted to the target area of skin.
In the embodiment of the invention, when the skin color of the target area skin is obtained, if the target area skin is detected to be close to the skin epilation device, white light is emitted to the target area skin, so that the target area skin forms diffuse reflection to the white light.
Specifically, in the embodiment of the present invention, it is preferable that white light having a predetermined color temperature range and a predetermined luminance range be emitted to the skin of the target area, for example, white light having a color temperature range of 6000 kelvin to 6500 kelvin and a luminance range of 200 to 250 millicandela per square meter may be emitted to the skin of the target area. In addition, in the embodiment of the present invention, the white light is a white light with a wavelength of 500 nm to 1100 nm; in a preferred embodiment, the white light is white light having a wavelength of 805 nm to 810 nm.
Step S102: and acquiring light information of the target light after the white light is subjected to diffuse reflection by the skin of the target area.
When it is detected in step S101 that the skin is close to the skin epilation device and white light is emitted to the target area skin, the target area skin diffusely reflects the white light, and in step S102, light information of the target light after diffuse reflection by the target area skin can be obtained through diffuse reflection by the target area skin.
Step S103: determining skin color information of the skin of the target area according to the light information of the target light.
After the light information of the target light is acquired through the step S102, the skin color information of the skin of the target area is acquired according to the light information of the target light. For example, the skin color of the skin of the target area obtained from the light information of the target light may be light or may be dark.
As an embodiment of the present invention, the light information of the target light in the step S102 is RGB values of the target light, and the step S103 specifically includes:
calculating a G ratio in the target light, and determining skin color information of the skin in the target area according to the G ratio; wherein the G ratio is the ratio between the B value and the G value in the target light.
In the basic principle of colorimetry, namely three primary colors, any one color can be generated by combining three colors of red (R), green (G) and blue (B) according to different numerical proportions, wherein the red, the green and the blue are three primary colors, and the color range of the combination of the three colors is the widest. The numerical values of the three colors may be referred to simply as R, G, and B numerical values, respectively. In the embodiment of the present invention, the target light may also be considered to be formed by combining the above three colors according to a certain numerical ratio, and we may define a concept of G ratio, i.e. the ratio between the B value and the G value. When the light information in the target light is obtained in step S102, RGB values in the target light may be further obtained, in the step of the embodiment of the present invention, a G ratio in the target light may be calculated by using the RGB values in the target light, and after the G ratio of the target light is determined, the skin color information of the skin in the target area may be determined according to the G ratio.
As an embodiment of the present invention, specifically, the determining the skin color information of the skin in the target area according to the G ratio specifically includes:
if the G ratio is in a first preset interval, determining that the skin of the target area is dark black skin;
if the G ratio is in a second preset interval, determining that the skin of the target area is bright black skin;
and if the G ratio is in a third preset interval, determining the skin color information of the skin in the target area according to the sum of the R numerical value, the B numerical value and the G numerical value in the RGB numerical values of the target light.
In the embodiment of the invention, the skin color information of the skin in the target area can be determined through the G ratio. In particular, see table 1 below:
table 1: presetting skin color information table
Specifically, if the G ratio is less than or equal to 0.4, that is, the G ratio in the first preset interval is less than or equal to 0.4, it is determined that the skin in the target area is dark black skin, and because the G ratio (i.e., the ratio of the B value to the G value) of dark black skin is more reduced than the G ratio of normal skin, and even more reduced than the G ratio of bright black skin, the G ratio of dark black skin is smaller than or even smaller than the G ratio of bright black skin. Therefore, when the G ratio is in the first preset interval, it is determined that the skin of the target area is dark black skin, and in addition, in the actual operation process, because dark black skin in asian and europeans is rare or almost zero, dark black skin in african race is relatively more, and therefore, when skin color detection is performed on the skin of asian or europeans, dark black skin is rarely detected.
If the G ratio is greater than 0.4 and less than 0.57, that is, the G ratio is greater than 0.4 and less than 0.57 in the second predetermined interval, it is determined that the skin in the target area is bright black skin, because the G value of the bright black skin is decreased compared with the general skin color, and the B value is much smaller than the B value of the general skin color, and the decrease degree of the B value of the bright black skin is much smaller than the decrease degree of the G value in the bright black skin. Therefore, the G ratio of the bright black skin is significantly reduced compared to that of the normal skin, and therefore, when the G ratio is in the second predetermined interval, it can be determined that the skin in the target area is bright black.
If the G ratio is greater than or equal to 0.57, that is, the G ratio is greater than or equal to 0.57 in the third preset interval, the skin color information of the skin in the target area may be determined according to the sum of the R value, the B value, and the G value in the RGB values of the target light. Because the G ratio of the common skin in the step is relatively close and has small difference, the skin color information is determined by the G ratio in the interval, which is likely to have wrong judgment, and even the skin color information can not be effectively identified. Therefore, when the G ratio is in the third preset interval, different skin color information can be distinguished according to the sum of the R value, the G value and the B value, and the skin color information of the skin in the target area can be accurately determined. Therefore, when the G ratio is in the third preset interval, the skin color information of the skin in the target area can be determined according to the sum of the R value, the B value and the G value in the target light.
As an embodiment of the present invention, specifically, if the G ratio is in a third preset interval (that is, when the G ratio is greater than or equal to 0.57), the determining the skin color information of the skin in the target area according to the sum of the R value, the B value, and the G value in the RGB values of the target light specifically includes:
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a first preset range, determining the skin color information of the skin in the target area as first preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a second preset range, determining the skin color information of the skin in the target area as second preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a third preset range, determining the skin color information of the skin in the target area as third preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fourth preset range, determining the skin color information of the skin in the target area as fourth preset skin color information;
and if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fifth preset range, determining the skin color information of the skin in the target area as fifth preset skin color information.
In the embodiment of the invention, as the sum of the R numerical value, the B numerical value and the G numerical value changes from small to large, the skin color information of the skin of the target area changes from dark to light and from black to white, namely the smaller the sum of the R numerical value, the B numerical value and the G numerical value is, the darker and darker the skin color information of the skin of the target area is; the larger the sum of the R value, the B value, and the G value is, the lighter and whiter the skin color information of the skin of the target area is. The first preset skin color information and the second preset skin color information are dark skin relative to the third preset skin color information, the fourth preset skin color information and the fifth preset skin color information; the third preset skin color information, the fourth preset skin color information and the fifth preset skin color information are light-colored skin relative to the first preset skin color information and the second preset skin color information. See table 1 above for details:
(1) when the G ratio is greater than or equal to 0.57, and the sum of the R value, the B value, and the G value is greater than or equal to 1370 and is less than 1525, that is, the first preset range is a range in which the sum of the three RGB values is greater than or equal to 1370 and is less than 1525, it may be determined that the skin color information of the target area is the first preset skin color information.
(2) When the G ratio is greater than or equal to 0.57, and the sum of the R value, the B value, and the G value is greater than or equal to 1525 and less than 1775, that is, the second preset range is a range in which the sum of the three RGB values is greater than or equal to 1525 and less than 1775, it may be determined that the skin color information of the target area is the second preset skin color information.
(3) When the G ratio is greater than or equal to 0.57, and the sum of the R value, the B value, and the G value is greater than or equal to 1775 and is less than 2025, that is, the third preset range is that the sum of the three RGB values is greater than or equal to 1775 and is less than 2025, it may be determined that the skin color information of the target area is the third preset skin color information.
(4) When the G ratio is greater than or equal to 0.57, and the sum of the R value, the B value, and the G value is greater than or equal to 2025 and is less than 2275, that is, the fourth preset range is that the sum of the three RGB values is greater than or equal to 2025 and is less than 2275, it may be determined that the skin color information of the target area is the fourth preset skin color information.
(5) When the G ratio is greater than or equal to 0.57, and the sum of the R value, the B value, and the G value is greater than or equal to 2275 and is less than 2525, that is, the fifth preset range is a range in which the sum of the three RGB values is greater than or equal to 2275 and is less than 2525, it may be determined that the skin color information of the target area is the fifth preset skin color information.
When the G ratio is equal to or greater than 0.57 and the sum of the R value, the B value, and the G value is smaller than 1370 or greater than 2525, since the sum of the R value, the B value, and the G value of the general skin color information is in the range of 1370 to 2525, the sum of the R value, the B value, and the G value of substantially most of the skin color information is in the range of 1370 to 2525, and therefore, the skin color detection is not required any more when the range is out of the above range, and it can be considered that the range is out of the operating range of the skin color detection system. In addition, in the actual skin color detection process, the situation that the sum of the R numerical value, the B numerical value and the G numerical value exceeds the interval range basically does not occur, so that the condition that the sum of the RGB numerical values is defined to be within the interval range can be met, and most of or even all of skin color detection can be met.
In the embodiment of the invention, the skin color detection method firstly emits white light to the skin of the target area if the skin is detected to be close to the skin epilation device, then obtains the light information of the target light after the white light is subjected to diffuse reflection by the skin of the target area, and finally determines the skin color information of the skin of the target area according to the light information of the target light. Compared with the existing skin color detection system, the skin color detection method in the embodiment of the invention has the advantages that the detection algorithm is simple, and the cost of the skin color detection system can be reduced.
Fig. 2 (corresponding to fig. 1) shows a module structure of a skin color detection apparatus according to an embodiment of the present invention, where each module included in the skin color detection apparatus in fig. 2 is used to execute each step in the embodiment corresponding to fig. 1, and specific reference is made to fig. 1 and the related description in the embodiment corresponding to fig. 1, which is not repeated herein. For convenience of explanation, only the parts related to the embodiments of the present invention are shown, and detailed as follows:
as shown in fig. 2, the skin color detection apparatus includes: a transmitting module 201, an obtaining module 202 and a skin tone determining module 203.
An emitting module 201, configured to emit white light to the skin of the target area if it is detected that the skin is close to the skin epilating apparatus.
The obtaining module 202 is configured to obtain light information of the target light after the white light is diffusely reflected by the skin of the target area.
A skin color determining module 203 for determining skin color information of the skin of the target area according to the light information of the target light.
Further, the light information of the target light is an RGB value of the target light, and the skin color determining module 203 determines the skin color information of the skin of the target area according to the light information of the target light specifically as follows:
calculating a G ratio in the target light, and determining skin color information of the skin in the target area according to the G ratio; wherein the G ratio is the ratio between the B value and the G value in the target light.
Further, the skin color determining module 203 determines the skin color information of the skin in the target area according to the G ratio specifically as follows:
if the G ratio is in a first preset interval, determining that the skin of the target area is dark black skin;
if the G ratio is in a second preset interval, determining that the skin of the target area is bright black skin;
and if the G ratio is in a third preset interval, determining the skin color information of the skin in the target area according to the sum of the R numerical value, the B numerical value and the G numerical value in the RGB numerical values of the target light.
Further, the skin color determining module 203 determines the skin color information of the skin of the target area according to the sum of the R value, the B value and the G value in the RGB values of the target light, specifically:
if the G ratio is in the third preset interval, determining the skin color information of the skin in the target area according to the sum of the R value, the B value and the G value in the RGB values of the target light specifically is:
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a first preset range, determining the skin color information of the skin in the target area as first preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a second preset range, determining the skin color information of the skin in the target area as second preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a third preset range, determining the skin color information of the skin in the target area as third preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fourth preset range, determining the skin color information of the skin in the target area as fourth preset skin color information;
and if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fifth preset range, determining the skin color information of the skin in the target area as fifth preset skin color information.
In the embodiment of the present invention, if it is detected that skin is close to a skin epilation device, the transmitting module 201 in the skin color detecting apparatus transmits white light to the skin of a target area, then the obtaining module 202 obtains light information of target light of the white light after diffuse reflection by the skin of the target area, and finally the skin color determining module 203 determines skin color information of the skin of the target area according to the light information of the target light. Compared with the existing skin color detection system, the skin color detection method in the embodiment of the invention has the advantages that the detection algorithm is simple, and the cost of the skin color detection system can be reduced.
In view of the above advantages of simple detection algorithm and capability of reducing the cost of the skin color monitoring system, the embodiment of the present invention further provides a skin depilating device, which includes the skin color detection device.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A skin color detection method, characterized in that the skin color detection method comprises:
emitting white light to the skin of the target area if skin proximity to the skin epilation device is detected, comprising: emitting white light with a preset color temperature range and a preset brightness range to the skin of the target area;
acquiring light information of target light after the white light is subjected to diffuse reflection by the skin of the target area;
determining skin color information of the skin of the target area according to the light information of the target light;
the light information of the target light is an RGB value of the target light, and the determining the skin color information of the skin of the target area according to the light information of the target light specifically includes:
calculating a G ratio in the target light, and determining skin color information of the skin in the target area according to the G ratio; wherein the G ratio is a ratio between a B value and a G value in the target light;
the determining of the skin color information of the target area skin according to the G ratio specifically comprises:
if the G ratio is in a first preset interval, determining that the skin of the target area is dark black skin;
if the G ratio is in a second preset interval, determining that the skin of the target area is bright black;
if the G ratio is in a third preset interval, determining skin color information of the skin in the target area according to the sum of an R numerical value, a B numerical value and a G numerical value in the RGB numerical values of the target light;
if the G ratio is in a third preset interval, determining the skin color information of the skin in the target area according to the sum of the R value, the B value and the G value in the RGB values of the target light specifically includes:
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a first preset range, determining the skin color information of the skin in the target area as first preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a second preset range, determining the skin color information of the skin in the target area as second preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a third preset range, determining the skin color information of the skin in the target area as third preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fourth preset range, determining the skin color information of the skin in the target area as fourth preset skin color information;
and if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fifth preset range, determining the skin color information of the skin in the target area as fifth preset skin color information.
2. A skin tone detection apparatus, characterized in that the skin tone detection apparatus comprises:
an emitting module for emitting white light to the skin of the target area if it is detected that the skin is proximate to the skin epilation device, comprising: emitting white light with a preset color temperature range and a preset brightness range to the skin of the target area;
the acquisition module is used for acquiring the light information of the target light after the white light is subjected to diffuse reflection by the skin of the target area;
the skin color determining module is used for determining skin color information of the skin of the target area according to the light information of the target light;
the light information of the target light is an RGB value of the target light, and the skin color determining module determines the skin color information of the skin of the target area according to the light information of the target light specifically as follows:
calculating a G ratio in the target light, and determining skin color information of the skin in the target area according to the G ratio; wherein the G ratio is a ratio between a B value and a G value in the target light;
the skin color determining module determines the skin color information of the target area skin according to the G ratio, specifically:
if the G ratio is in a first preset interval, determining that the skin of the target area is dark black skin;
if the G ratio is in a second preset interval, determining that the skin of the target area is bright black;
if the G ratio is in a third preset interval, determining skin color information of the skin in the target area according to the sum of an R numerical value, a B numerical value and a G numerical value in the RGB numerical values of the target light;
the skin color determining module determines the skin color information of the target area skin according to the sum of the R value, the B value and the G value in the RGB values of the target light, specifically:
if the G ratio is in a third preset interval, determining the skin color information of the skin in the target area according to the sum of the R value, the B value and the G value in the RGB values of the target light specifically includes:
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a first preset range, determining the skin color information of the skin in the target area as first preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a second preset range, determining the skin color information of the skin in the target area as second preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a third preset range, determining the skin color information of the skin in the target area as third preset skin color information;
if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fourth preset range, determining the skin color information of the skin in the target area as fourth preset skin color information;
and if the G ratio is in a third preset interval and the sum of the R numerical value, the B numerical value and the G numerical value is in a fifth preset range, determining the skin color information of the skin in the target area as fifth preset skin color information.
3. A skin epilation device characterized in that the skin epilation device comprises skin tone detection means as claimed in claim 2.
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| CN108744294B (en) * | 2018-06-11 | 2020-04-07 | 广东龙晟医疗器械有限公司 | IPL skin care equipment, nursing method and medical information platform |
| CN110533732B (en) * | 2019-09-04 | 2021-11-26 | 厦门美图之家科技有限公司 | Method and device for identifying skin color in image, electronic equipment and storage medium |
| CN114521956B (en) * | 2021-12-31 | 2023-12-19 | 广州星际悦动股份有限公司 | Method, device and medium for controlling output energy based on skin color and dehairing instrument |
| CN117379033B (en) * | 2023-12-13 | 2024-02-20 | 深圳市宗匠科技有限公司 | Skin pigment detection method, device, computer equipment and storage medium |
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| CN101959469A (en) * | 2008-03-07 | 2011-01-26 | 皇家飞利浦电子股份有限公司 | Photo-epilation device |
| CN101893481A (en) * | 2009-05-18 | 2010-11-24 | 姜宁 | Method and system for testing and determining color attribute |
| CN105873537A (en) * | 2013-11-05 | 2016-08-17 | 家庭皮肤创新有限公司 | Combined galvanic and pulsed optical energy for depilation |
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