CN115251837A

CN115251837A - Skin measuring instrument, skin measuring system and skin measuring method

Info

Publication number: CN115251837A
Application number: CN202210600962.5A
Authority: CN
Inventors: 魏志坚; 刘汀科; 赖丽娟
Original assignee: Xiamen Solex High Tech Industries Co Ltd
Current assignee: Xiamen Solex High Tech Industries Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-11-01
Also published as: WO2023231820A1

Abstract

The invention discloses a skin measuring instrument, which comprises: the device comprises two conductive contact terminals, a light-emitting component, an image acquisition component and a control circuit; the control circuit is respectively connected with the two contact terminals so as to form a loop when the two contact terminals are in contact with the skin; the control circuit is connected with the light-emitting component to turn on the light source when the two contact terminals are both contacted with the skin and turn off the light source when the two contact terminals are not fully contacted with the skin; the control circuit is connected with the image acquisition assembly so as to control image acquisition according to the definition of the picture after the light source is started, and/or control image acquisition and detect the definition of the acquired image. The skin measuring instrument disclosed by the invention starts the light source after being tightly attached to the skin, and starts photographing after the picture is clear, so that the light source is prevented from dazzling, the accuracy of the detection result is improved, and the experience of a user is improved.

Description

Skin measuring instrument, skin measuring system and skin measuring method

Technical Field

The invention relates to the technical field of skin detection, in particular to a skin measuring instrument, a skin measuring system and a skin measuring method.

Background

The skin measuring system is an instrument for detecting skin, and can help consumers to intuitively and quickly know the health condition of the skin by matching with professional detection software. At present, a portable skin measuring system is more and more popular with users, and a comparison document "a skin measuring system and a skin measuring method thereof, CN109602393A", discloses a skin measuring system which comprises a pen body, a mobile phone and a cloud server, wherein the pen body comprises: the image collector is used for shooting an optical image of the skin and converting the optical image into an electric signal; the image processor is connected with the image collector and used for receiving the electric signal output by the image collector and generating an image file according to the electric signal; the wireless transmission module is connected with the image processor and is used for transmitting the image file generated by the image processor to a mobile phone in a wireless mode; the mobile phone is used for displaying an image file and uploading the image file to a cloud server; the cloud server is used for obtaining skin data after carrying out operation processing on the image file of the skin and feeding the skin data back to the mobile phone. Therefore, the pen body of the comparison file only has a simple image acquisition function, whether the pen body contacts the skin or not is not judged, the on/off of the light source is not controlled, and the definition of the image is not detected, so that the accuracy of the detection result cannot be guaranteed.

Disclosure of Invention

The invention mainly aims to provide a skin measuring instrument, a skin measuring system and a skin measuring method, which overcome the defects of the prior art, the light source is started after the skin is tightly attached, and meanwhile, the photographing is started after the picture is clear, so that the light source is prevented from dazzling, the accuracy of the detection result is improved, and the experience of a user is improved.

The invention adopts the following technical scheme:

in one aspect, a skin test instrument comprises:

two conductive contact terminals;

a light emitting assembly for emitting a light source;

the image acquisition assembly is used for acquiring a skin image;

the control circuit is respectively connected with the two contact terminals so as to form a loop when the two contact terminals are both contacted with the skin; the control circuit is connected with the light-emitting component to turn on the light source when the two contact terminals are both contacted with the skin and turn off the light source when the two contact terminals are not fully contacted with the skin; the control circuit is connected with the image acquisition assembly so as to control image acquisition according to the definition of the picture after the light source is started, and/or control image acquisition and detect the definition of the acquired image.

Preferably, the light source emitted by the light-emitting component at least comprises one of natural light, UV light or polarized light; the control circuit is connected with the light-emitting component and is also used for controlling and switching natural light, UV light or polarized light.

Preferably, the light emitting assembly includes: a lamp bead and a polarizing film; the lamp beads are used for emitting natural light or UV light; the polaroid is arranged in front of the lamp bead and used for converting light emitted by the lamp bead into polarized light.

Preferably, the control circuit comprises a light source circuit and a main control circuit; the two contact terminals are respectively connected with the light source circuit to form a closed loop; the light source circuit is connected with the main control circuit to send signals output by the contact terminal and receive signals returned by the main control circuit to control the light-emitting component to turn on or turn off the light source; the main control circuit is connected with the image acquisition assembly to control image acquisition.

Preferably, the control circuit comprises a communication module; the communication module is used for being connected with external terminal equipment.

Preferably, the skin measuring instrument further comprises: a power supply module; the power supply module is connected with the control circuit to supply power.

Preferably, the skin measuring instrument further comprises: a switch module; the switch module is connected with the control circuit to start the skin measuring instrument.

Preferably, the skin measuring instrument further comprises: a voice prompt module; the voice prompt module is connected with the control circuit to perform voice prompt.

Preferably, the skin measuring instrument further comprises: the detection head, the fixed seat and the lower shell are arranged in sequence; the two contact terminals are oppositely arranged on the detection head; the light-emitting component is arranged in the detection head; the image acquisition assembly is arranged in the fixed seat; the control circuit is arranged in the lower shell and/or the fixed seat.

Preferably, the skin measuring instrument further comprises a top cover; the detection head and the fixed seat are arranged in the top cover; the top cover is connected with the lower shell to form a whole.

In a second aspect, a skin test system comprises the skin test instrument; the system also comprises external terminal equipment; the external terminal device is connected with the skin measuring instrument to control the skin measuring instrument to start the skin measuring according to a set instruction, the skin measuring instrument sends the collected image to the external terminal device, and the external terminal device obtains skin data after carrying out operation processing on the collected image.

In a third aspect, a skin test system comprises the skin test instrument; the system also comprises external terminal equipment and a cloud server; the external terminal equipment is connected with the skin measuring instrument to control the skin measuring instrument to start the skin measuring according to a set instruction, and the skin measuring instrument sends the acquired image to the external terminal equipment; the skin measuring instrument or the external terminal device uploads the acquired image to the cloud server, the cloud server performs operation processing to obtain skin data, and the skin data are sent to the external terminal device.

In a fourth aspect, a method of skin measurement, comprising:

s102, detecting the received electric signal, and controlling to start one light source in a preset light source set when the value of the electric signal reaches a preset value;

s104, starting to collect skin images, detecting the definition of a picture before photographing, and controlling photographing to collect the images when the picture is detected to be clear;

s106, judging whether image acquisition of all light sources in a preset light source set is finished or not, and if so, turning off the light sources; if not, controlling one of the un-turned-on light sources to be turned on, and repeating the steps 104-106.

Preferably, in S102, when the value of the electrical signal reaches a preset value, controlling to turn on one light source in a preset light source set, specifically including:

and when the value of the electric signal reaches a preset value and lasts for a preset time, controlling to start one light source in a preset light source set.

Preferably, the S104 further includes:

when the picture is not clear, the voice prompts the adjustment of the position and/or the adjustment of the pressing force.

Preferably, after S104, the method further includes:

and S105, judging the definition of the acquired image, if the acquired image is clear, executing S106, otherwise, prompting to acquire again by voice, and repeating the steps 104-106 after restarting the corresponding light source.

Preferably, the image definition algorithm model is used for obtaining the definition of the picture or the collected image, and the definition conversion function is used for obtaining the definition probability of the picture or the collected image.

Preferably, the S104 further includes: judging the definition type according to the definition probability of the picture or the collected image, wherein the definition type comprises definition, general definition or blur; if the picture is clear, controlling to take the picture; if the preset key is normally clear, judging whether the preset key is pressed, if so, forcibly photographing, and otherwise, carrying out voice prompt; if the information is unclear, voice prompt is carried out.

Preferably, after S106, the method further includes:

s108, prompting the next skin detection point, and repeating the steps 102-106.

Compared with the prior art, the invention has the following beneficial effects:

(1) The skin test instrument of the present invention comprises: the device comprises two conductive contact terminals, a light-emitting component, an image acquisition component and a control circuit; the control circuit is respectively connected with the two contact terminals to form a closed loop when contacting with the skin, when the signal output by one contact terminal is detected to rise and reach a preset value (current value or voltage value), the skin is judged to be contacted by the skin measuring instrument, the light source light-emitting component is controlled to be started, and definition detection is carried out before and/or after image acquisition; according to the invention, the light source is started to seal the detection area after the skin measuring instrument contacts the skin, so that on one hand, the light source emitted by the skin measuring instrument is not influenced by ambient light, the intensity of the light source is ensured to be consistent every time, the detection accuracy is improved, on the other hand, the dazzling of the detection light source and the damage to eyes (the instrument is close to the eyes when the face is detected) can be avoided, and the electricity is saved; the invention carries out definition detection before and/or after image acquisition, and can ensure that the acquired image is a clear image, thereby improving the accuracy of the detection result;

(2) The invention can automatically switch the light source, automatically turn on/off the light source, make the voice prompt picture or image unclear, prompt the skin measuring instrument to leave the skin by voice, etc., thus realizing automatic control and interaction and improving the experience of the user;

(3) The skin measuring instrument can detect one position of the face or a plurality of designated positions of the whole face according to the detection instruction of the external terminal equipment, and the detection of each position triggers three light sources (natural light, UV light and polarized light) to carry out image acquisition, thereby meeting various requirements of skin detection and analysis.

The above description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the description of the technical means more comprehensible.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a perspective view of a skin measurement instrument according to a first embodiment of the present invention;

FIG. 2 is an exploded view of a skin test instrument according to a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a skin measurement instrument according to a first embodiment of the present invention;

FIG. 4 is a cross-sectional view of a portion of a test head and a mounting base according to a first embodiment of the invention;

fig. 5 is a schematic structural view of a contact terminal forming a loop with skin according to a first embodiment of the invention;

fig. 6 is a schematic structural diagram of a loop formed by the light source circuit and the main control circuit according to the first embodiment of the present invention;

fig. 7 is a block diagram of a skin measurement system (interaction between a skin measurement instrument and an external terminal device) according to a second embodiment of the present invention;

fig. 8 is a flowchart illustrating interaction between a skin measurement instrument and an external terminal device according to a second embodiment of the present invention;

fig. 9 is a block diagram of a skin measurement system (interaction between a skin measurement instrument, an external terminal device, and a cloud server) according to a third embodiment of the present invention;

FIG. 10 is a flowchart of a skin test method according to a fourth embodiment of the present invention;

fig. 11 is a flowchart of a local skin measurement method including three light sources according to a fourth embodiment of the present invention, in which (a) the definition detection before image acquisition is included, and (b) the definition detection before image acquisition and after image acquisition is included;

fig. 12 is a flowchart of a full-face skin measurement method including three light sources according to a fourth embodiment of the present invention, where (a) includes sharpness detection before image acquisition, and (b) includes sharpness detection before image acquisition and after image acquisition.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is to be understood that the embodiments described are merely exemplary embodiments, rather than exemplary embodiments, and that all other embodiments may be devised by those skilled in the art without departing from the scope of the present invention.

In the description of the present invention, it is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements.

In the description of the present invention, it should be noted that, unless explicitly specified or limited otherwise, the step identifiers S101, S102, S103, etc. are used for convenience only and do not indicate the execution sequence, and the corresponding execution sequence may be adjusted.

Example one

Referring to fig. 1 to 6, a skin measuring instrument 1 includes:

two contact terminals 10 that are electrically conductive;

a light emitting assembly 11 for emitting a light source;

an image acquisition component 12 for acquiring skin images;

the control circuit is respectively connected with the two contact terminals 10 so as to control one contact terminal to send out a signal and receive a signal output by the other contact terminal, and the contact state of the two contact terminals 10 and the skin is obtained according to the received signal; the control circuit is connected with the light-emitting component 11 to turn on the light source when the two contact terminals 10 are both contacted with the skin and turn off the light source when the two contact terminals 10 are not fully contacted with the skin; the control circuit is connected with the image acquisition assembly 12 to control image acquisition according to the definition of a picture after the light source is started, and/or control image acquisition and detect the definition of an acquired image.

Specifically, a control chip (such as a single chip or an MCU) of the control circuit is connected to the two contact terminals 10, after the skin measurement instrument 1 is started, the control chip sends a continuous pulse signal (such as a PWM signal) to one contact terminal (the first contact terminal 101) through an output port, the first contact terminal sends a signal to the outside after receiving the pulse signal, and when the skin measurement instrument is not in contact with the skin, the other contact terminal (the second contact terminal 102) receives the signal sent by the first contact terminal through air (i.e., forms a loop with air) and outputs the signal to the control chip through an electronic component (such as a resistor, etc.), the control chip receives the signal output by the second contact terminal through a receiving terminal, and since the air has no conductivity (occasionally very weak conductivity) in most cases, the electrical signal received by the control chip is 0 or a small value; after contacting with the skin, the other contact terminal (the second contact terminal 102) receives the signal sent by the first contact terminal 101 through the skin of the human body (i.e. forming a loop with the skin of the human body, see fig. 5) and outputs the signal to the control chip through an electronic component (such as a resistor, etc.), the control chip receives the signal output by the second contact terminal 102 through a receiving terminal, and the control chip can receive a large electrical signal value which changes suddenly after contacting with the skin due to the conductivity of the skin. In this embodiment, the electrical signal may be a voltage signal, and when the control chip detects that the voltage signal is greater than a preset voltage value, it is determined that the two contact terminals 10 have contacted the skin, so as to control to turn on the light source; similarly, when the control chip detects that the voltage signal is smaller than the preset voltage value, it is determined that at least one of the two contact terminals 10 is not in contact with the skin, so as to control the on/off.

According to the invention, the light source is started to seal the detection area after the skin measuring instrument 1 contacts the skin, so that on one hand, the light source emitted by the skin measuring instrument 1 is not influenced by ambient light, the light source intensity is ensured to be consistent every time, the detection accuracy is improved, on the other hand, the dazzling of the detection light source and the damage to eyes (the instrument is close to the eyes when the face is detected) can be avoided, and the electricity is saved; the invention carries out definition detection before and/or after image acquisition, and can ensure that the acquired image is a clear image, thereby improving the accuracy of the detection result.

In this embodiment, the light source emitted by the light emitting assembly 11 includes at least one of natural light, UV light, or polarized light; the control circuit is connected with the light emitting component 11 and is further used for controlling and switching natural light, UV light or polarized light. The control circuit controls the natural light, the UV light or the polarized light to be turned on and off sequentially or randomly according to the preset. In one embodiment, the natural light may be controlled to be turned on first after the two contact terminals 10 are detected to contact the skin, the skin image may be automatically collected under UV light after the skin image is collected under the natural light, the skin image may be automatically collected under polarized light finally, and the light source may be controlled to be turned off after the skin image is collected under all three light sources. It should be noted that, what sequence of the three light sources is triggered may be set according to specific needs, and this embodiment is not limited. Of course, according to the detection requirement, only one or two of the three light sources can be turned on, that is, only the skin image under one or two light sources needs to be collected.

Different light sources have different wavelengths, and different spectral images can be acquired by penetrating into different skin depths. For example, natural light can irradiate soft scattered light from all directions, and the condition of facial skin can be comprehensively evaluated; the polarized light can weaken direct reflected light, and the skin color unevenness and sensitivity (red blood silk) of the subcutaneous part of the surface can be observed; UV light can penetrate the surface layer of the skin to the lower part of the epidermis, trapping hair follicle blockages (porphyrins) and the like.

Referring to fig. 4, the light emitting assembly 11 includes: a lamp bead 111 and a polarizing plate 110; the lamp beads 111 are used for emitting natural light or UV light; the polarizer 110 is disposed in front of the lamp bead 111, and is configured to convert light emitted by the lamp bead 111 into polarized light. Specifically, referring to fig. 2, the polarizer 110 includes a polarizer 1101 and an analyzer 1102.

Referring to fig. 6, the control circuit includes a light source circuit 131 and a main control circuit 132; the two contact terminals 10 are respectively connected with the light source circuit 131 to form a closed loop; the light source circuit 131 is connected to the main control circuit 132 to send signals output by the contact terminals, and receives signals returned by the main control circuit 132 to control the light emitting assembly 11 to turn on or off the light source; the main control circuit 132 is connected to the image capturing assembly 12 to control image capturing.

Specifically, referring to fig. 2, the two contact terminals 10 are disposed on the detection head 14; the light emitting component 11 and the light source circuit 131 are both arranged inside the detection head 14, so that the two contact terminals 10 and the light source circuit 131 have a short distance, on one hand, the circuit wiring is more convenient, and on the other hand, the circuit precision is higher. The light source circuit 131 is connected to the main control circuit 132 through a light source interface 1322 to form a loop, and the image capturing module is connected to the main control circuit 132 through a camera interface 1321 to form a loop.

It should be noted that the light source circuit 131 and the main control circuit 132 may also be configured by one circuit (integrated on one circuit board), specifically according to the need, and this embodiment is not limited.

In this embodiment, the control circuit includes a communication module 1323; the communication module is used for being connected with the external terminal device 2. Specifically, the communication module may be a wireless communication module, such as a WIFI module/bluetooth module.

In this embodiment, the skin measuring apparatus 1 further includes: a power supply module 17; the power supply module 17 is connected with the control circuit to supply power. The power module can comprise a rechargeable lithium battery, and is convenient to use.

In this embodiment, the skin measurement instrument 1 further includes: a switch module 18; the switch module 18 is connected with the control circuit to turn on the skin measuring instrument 1. Specifically, the switch module 18 is disposed on a housing of the skin measurement instrument 1, and includes a key switch or a touch switch. After the key switch is pressed or the touch switch is touched, the skin measuring instrument 1 can be controlled to be started.

In this embodiment, the skin measurement instrument 1 further includes: a voice prompt module; the voice prompt module is connected with the control circuit to perform voice prompt. Specifically, the close contact with the skin can be prompted when the two contact terminals 10 are not in full contact with the skin; prompting that the lamp is to be turned on to collect images and the like after the measuring contact terminals are all contacted with the skin; prompting the adjustment position or the pressing force degree and the like when the picture before the collection is unclear or the image after the collection is unclear; prompting that the acquisition is finished after all the images are acquired, and asking that the images leave the skin or moving to the next detection point (specific detection points can be prompted, such as the forehead, the cheek, the nose or the chin and the like); during the collecting process, if the two contact terminals 10 do not contact the skin completely, the corresponding prompt can be performed. Specifically, how to perform the prompt and what kind of scene to perform the prompt may be set as required.

In this embodiment, the skin measurement instrument 1 further includes: the detection head 14, the fixed seat 15 and the lower shell 16 are arranged in sequence; the two contact terminals 10 are oppositely arranged on the detection head 14; the light emitting assembly 11 is arranged in the detection head 14; the image acquisition assembly 12 is arranged in the fixed seat 15; the control circuit is arranged in the lower housing 16 and/or the fixed base 15.

Specifically, the end of the detection head 14 is provided with two openings 142 for accommodating the two contact terminals. The two contact terminals 10 are oppositely arranged on the end face of the detection head 14, so that when the end face of the detection head 14 is completely attached to the skin, the two contact terminals can both contact the skin, and the contact detection can be more accurate.

Specifically, the two contact terminals 10 may be plastic plated parts or metal parts, as long as the two contact terminals are conductive, and in order to make the skin measuring instrument 1 more portable, the two contact terminals 10 of the present embodiment are plastic plated parts.

The detection head 14 is further provided with a detection port, the light source emitted by the light emitting component 11 can irradiate the skin through the detection port 141, and correspondingly, the image acquisition component 12 can acquire a skin picture or an image through the detection port. The detection port can be empty, and transparent plastics can be arranged for blocking as long as the light source is not filtered.

When the control circuit includes the light source circuit 131 and the main control circuit 132 as described above, the light source circuit 131 is disposed in the fixing base 15, and the main control circuit 132 is disposed in the lower housing 16.

In this embodiment, the skin measuring apparatus 1 further includes a top cover 19; the detection head 14 and the fixed seat 15 are arranged in the top cover 19; the top cover 19 is connected to the lower case 16 to form a single body. The top cover 19 is used for preventing dust from entering the detection head 14 to protect the skin measuring instrument 1, and when the skin measuring instrument is used, the top cover 19 can be removed for detection.

Example two

Referring to fig. 7, a skin measurement system of the present embodiment includes a skin measurement device 1 according to the first embodiment; also included is an external terminal device 2; the external terminal device 2 is connected with the skin measuring instrument 1 to control the skin measuring instrument 1 to start skin measurement according to a set instruction, the skin measuring instrument 1 sends a collected image to the external terminal device 2, and the external terminal device 2 obtains skin data after performing operation processing on the collected image.

In this embodiment, external terminal equipment 2 include cell-phone, IPAD, computer or cosmetic instrument etc. install corresponding APP on cell-phone, IPAD, computer or the cosmetic instrument, the user sends down the detection instruction through APP and gives survey skin instrument 1, will survey the image transmission that skin instrument 1 gathered simultaneously and arrive on external terminal equipment 2's the APP, the APP carries out image display and information prompt, simultaneously, shows obtain skin data after external terminal equipment 2 carries out the operation to the image of gathering.

Specifically, the external terminal device 2 communicates with the skin measurement instrument 1 through a communication module.

Referring to fig. 8, for wireless communication, after the skin test apparatus 1 is powered on, it is connected to the external terminal device 2 through a network search device. Then, user registration or the like is performed through the APP of the external terminal device 2. After the registration is completed (or the registration is not needed, namely a temporary user), a detection instruction including full-face detection and local detection can be issued through the APP. The whole face detection may include forehead detection, cheek detection, nose detection, chin detection, and the like, and the skin measurement instrument 1 moves to another designated position after the image of one part is collected until all parts are collected. For local detection, a certain part of the face can be specified to be detected.

It should be noted that the skin measuring instrument 1 of the present invention can also collect the detection of the skin of other body parts besides the face.

EXAMPLE III

Referring to fig. 9, a skin measurement system of the present embodiment includes a skin measurement instrument 1 of the first embodiment; the system also comprises an external terminal device 2 and a cloud server 3; the external terminal device 2 is connected with the skin measuring instrument 1 to control the skin measuring instrument 1 to start skin measuring according to a set instruction, and the skin measuring instrument 1 sends the acquired image to the external terminal device 2; the skin measuring instrument 1 or the external terminal device 2 uploads the acquired image to the cloud server 3, the cloud server 3 performs operation processing to obtain skin data, and the skin data are sent to the external terminal device 2.

In this embodiment, external terminal equipment 2 include cell-phone, IPAD, computer or cosmetic instrument etc. install corresponding APP on cell-phone, IPAD, computer or the cosmetic instrument, the user issues the detection instruction through APP and gives survey skin instrument 1, will survey the image transmission that skin instrument 1 gathered simultaneously and arrive on external terminal equipment 2's the APP, the APP carries out image display and information prompt, simultaneously, shows cloud server 3 reachs skin data after carrying out the operation to the image of gathering.

Specifically, the external terminal device 2 and the cloud server 3 communicate with the skin measurement instrument 1 through a communication module.

For wireless communication, after the skin measuring instrument 1 is started, the connection with the external terminal device 2 and the cloud server 3 is realized through network searching equipment. Then, user registration or the like is performed through the APP of the external terminal device 2. After the registration is finished (or the registration is not required, namely a temporary user), a detection instruction can be issued through the APP, and the detection instruction comprises full-face detection and local detection. The whole face detection can comprise forehead detection, cheek detection, nose detection, chin detection and the like, and when the skin detection instrument 1 finishes collecting the image of one part, namely, the voice prompt or the information prompt moves to another specified position until all parts are collected. For local detection, a certain part of the face can be specified to be detected.

It should be noted that the skin measuring instrument 1 of the present invention can also be used for detecting the skin of other body parts besides the face.

Example four

Referring to fig. 10, a skin measurement method according to this embodiment includes:

s106, judging whether image acquisition of all light sources in a preset light source set is finished or not, and if so, turning off the light sources; if not, controlling one of the un-activated light sources to be activated, and repeating the steps 104-106.

The execution main body of the skin test method is a control chip (such as a singlechip or an MCU) of a control circuit. Specifically, the control chip is connected to the two contact terminals, the control chip sends a continuous pulse signal (such as a PWM signal) to one contact terminal (the first contact terminal) through an output port, the first contact terminal sends a signal to the outside after receiving the pulse signal, when the control chip is not in contact with the skin, the other contact terminal (the second contact terminal) receives the signal sent by the first contact terminal through air (i.e., forms a loop with the air) and outputs the signal to the control chip after passing through an electronic component (such as a resistor, etc.), the control chip receives the signal output by the second contact terminal through a receiving terminal, and since the air has no conductivity (occasionally very weak conductivity) in most cases, the electrical signal received by the control chip is 0 or a small value; after contacting with the skin, the other contact terminal (second contact terminal) receives the signal sent by the first contact terminal through the skin of the human body (i.e. forming a loop with the skin of the human body, see fig. 5) and outputs the signal to the control chip through an electronic component (such as a resistor, etc.), the control chip receives the signal output by the second contact terminal through a receiving terminal, and the control chip can receive a large electrical signal value which changes suddenly after contacting with the skin because the skin has conductivity.

The electrical signal may be a current signal or a voltage signal, preferably a voltage signal in this embodiment, and when the control chip detects that the voltage signal is greater than a preset voltage value, it is determined that the two contact terminals have contacted the skin, so as to control to turn on the light source; similarly, when the control chip detects that the voltage signal is smaller than the preset voltage value, at least one of the two contact terminals is judged not to be in contact with the skin, so that the on/off of the switch is controlled.

The preset light source set at least comprises one of natural light, UV light and polarized light. Specifically, it is possible to control whether only skin images under one light source or skin images under multiple light sources are acquired as needed.

Referring to fig. 11 and 12, in S102, when the value of the electrical signal reaches a preset value, controlling to turn on one light source in a preset light source set, specifically including:

In the using process, a user may have a condition of false contact, and in order to prevent detection triggering caused by the condition, the contact time of the two contact terminals needs to be judged.

In this embodiment, the S104 further includes:

In this embodiment, after S104, the method further includes:

In this embodiment, the image sharpness algorithm model is used to obtain the sharpness of the picture or the collected image, and the sharpness conversion function is used to obtain the sharpness probability of the picture or the collected image.

Specifically, the image sharpness algorithm model may be a convolutional neural network model. The method specifically comprises the steps of collecting a large number of image samples with different definition degrees in the early stage to train a model, using the trained convolutional neural network model to judge the definition of the collected pictures or images to output results, and carrying out numerical conversion on the output results of the convolutional neural network model through a definition conversion function to obtain definition probability.

In one embodiment, the binary results of the convolutional neural network model are transformed using the following sharpness transformation function. If the classification results output by the convolutional neural network model are-0.11 and 3, the ambiguity probability converted by the following formula is 47%, the definition probability is 95%, and the definition probability is greater than the ambiguity probability, so that the final result is clearly judged.

In another embodiment, the three classification results of the convolutional neural network model are transformed using the following sharpness transformation function. If the image is clear at 0.85, the convolutional neural network model is judged to be clear, if the image is clear at 0.1, the convolutional neural network model is judged to be generally clear, if the image is clear at 0.05, the convolutional neural network model is judged to be fuzzy, and then the convolutional neural network model is converted into a definition probability through a definition transfer function, wherein the definition probability is as follows:

it should be noted that, in other embodiments, whether to take a picture may also be controlled directly according to the output result of the convolutional neural network model.

The S104 further includes: judging the definition type according to the definition probability of the picture or the collected image, wherein the definition type comprises definition, general definition or blur; if the picture is clear, controlling to take the picture; if the preset key is normally clear, judging whether the preset key is pressed, if so, forcibly photographing, and otherwise, carrying out voice prompt; if the information is unclear, voice prompt is carried out. The judgment is carried out through the definition probability, and then the picture or the image can be judged to be clear, generally clear or fuzzy. In this embodiment, the sharpness probability of 0.9 or more is determined as sharpness, the sharpness probability of 0.7 to 0.9 is determined as normal sharpness, and the sharpness probability of 0.7 or less is determined as blur. The specific threshold value can be set as required.

In this embodiment, if the detection mode is set to full-face detection on the APP of the external terminal device, after S106, the method further includes:

s108, prompting the next skin detection point, and repeating the steps 102-106.

The invention can automatically switch the light source, automatically turn on/off the light source, make the voice prompt picture or image unclear, prompt the skin measuring instrument to leave the skin by voice, and the like, thereby realizing automatic control and interaction and improving the experience of users.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by the equivalent or modified embodiments and the modified concepts of the present invention.

Claims

1. A skin measurement instrument, comprising:

two conductive contact terminals;

a light emitting assembly for emitting a light source;

the image acquisition assembly is used for acquiring a skin image;

2. The skin test instrument of claim 1, wherein the light source emitted by the light emitting assembly comprises at least one of natural light, UV light, or polarized light; the control circuit is connected with the light-emitting component and is also used for controlling and switching natural light, UV light or polarized light.

3. The skin measurement instrument of claim 2, wherein the light emitting assembly comprises: a lamp bead and a polarizing film; the lamp beads are used for emitting natural light or UV light; the polaroid sheet is arranged in front of the lamp beads and used for converting light emitted by the lamp beads into polarized light.

4. The skin test instrument of claim 1, wherein the control circuit comprises a light source circuit and a master control circuit; the two contact terminals are respectively connected with the light source circuit to form a closed loop; the light source circuit is connected with the main control circuit to send signals output by the contact terminal and receive signals returned by the main control circuit to control the light-emitting component to turn on or turn off the light source; the main control circuit is connected with the image acquisition assembly to control image acquisition.

5. The skin test instrument of claim 1, wherein the control circuit comprises a communication module; the communication module is used for being connected with external terminal equipment.

6. The skin measurement instrument of claim 1, further comprising: a power supply module; the power supply module is connected with the control circuit to supply power.

7. The skin measurement instrument of claim 1, further comprising: a switch module; the switch module is connected with the control circuit to start the skin measuring instrument.

8. The skin measurement instrument of claim 1, further comprising: a voice prompt module; the voice prompt module is connected with the control circuit to perform voice prompt.

9. The skin test instrument of claim 1, further comprising: the detection head, the fixed seat and the lower shell are arranged in sequence; the two contact terminals are oppositely arranged on the detection head; the light-emitting assembly is arranged in the detection head; the image acquisition assembly is arranged in the fixed seat; the control circuit is arranged in the lower shell and/or the fixed seat.

10. The skin test instrument of claim 9, further comprising a top cover; the detection head and the fixed seat are arranged in the top cover; the top cover is connected with the lower shell to form a whole.

11. A skin test system comprising a skin test instrument as claimed in any one of claims 1 to 10; the system also comprises external terminal equipment; the external terminal device is connected with the skin measuring instrument to control the skin measuring instrument to start skin measuring according to a set instruction, the skin measuring instrument sends the collected image to the external terminal device, and the external terminal device performs operation processing on the collected image to obtain skin data.

12. A skin test system comprising a skin test instrument as claimed in any one of claims 1 to 10; the system also comprises external terminal equipment and a cloud server; the external terminal equipment is connected with the skin measuring instrument to control the skin measuring instrument to start the skin measuring according to a set instruction, and the skin measuring instrument sends the acquired image to the external terminal equipment; the skin measuring instrument or the external terminal device uploads the collected image to the cloud server, the cloud server obtains skin data after operation processing, and the skin data are sent to the external terminal device.

13. A method of skin measurement, comprising:

s102, detecting a received electric signal, and controlling to start one light source in a preset light source set when the value of the electric signal reaches a preset value;

14. The method according to claim 13, wherein in S102, when the value of the electrical signal reaches a predetermined value, controlling to turn on one light source in a predetermined set of light sources, specifically comprising:

15. The method of claim 13, wherein S104 further comprises:

16. The method of claim 13, further comprising, after S104:

17. The skin test method of claim 13, wherein the sharpness of the picture or the captured image is obtained using an image sharpness algorithm model, and the sharpness probability of the picture or the captured image is obtained using a sharpness transfer function.

18. The method of claim 17, wherein S104 further comprises: judging the definition type according to the definition probability of the picture or the collected image, wherein the definition type comprises definition, general definition or fuzziness; if the picture is clear, controlling to take the picture; if the picture is generally clear, judging whether a preset key is pressed, if so, forcibly photographing, and otherwise, carrying out voice prompt; if not, voice prompt is carried out.

19. The method of claim 13, further comprising, after S106:

s108, prompting the next skin detection point, and repeating the steps 102-106.