CN110558940A - image acquisition device for skin detection - Google Patents
image acquisition device for skin detection Download PDFInfo
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- CN110558940A CN110558940A CN201910808758.0A CN201910808758A CN110558940A CN 110558940 A CN110558940 A CN 110558940A CN 201910808758 A CN201910808758 A CN 201910808758A CN 110558940 A CN110558940 A CN 110558940A
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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
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
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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
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Abstract
the invention provides an image acquisition device for skin detection, comprising: the device comprises a fixed seat, an imaging cavity, a light source component, a filter component and a camera; the imaging cavity is rotatably arranged on the fixed seat and is provided with an imaging window; the light source assembly is arranged in the imaging cavity and comprises a UV light source, a polarized light source, a white light source and white light sources, wherein the UV light source, the polarized light source and the white light source are formed at two sides of the imaging window, and the white light sources are arranged at the upper side and the lower side of the cavity; the filter assembly is positioned in front of the camera lens, is rotatably arranged on the imaging cavity and comprises a UV filter, a cross polarization filter, a parallel polarization filter and a light hole, and the filter, the light hole and the light source form different light source filter combinations; the camera is used for collecting the face image according to the camera parameters corresponding to the light source filter combinations under different light source filter combinations. The invention can realize the accurate collection of the front, left side and right side images of the face.
Description
Technical Field
The invention relates to an image acquisition device, in particular to an image acquisition device for skin detection.
Background
With the improvement of living standard, people pay more and more attention to external appearance. People can regularly peel skin and diagnose the mechanism and detect the skin to carry out pertinence treatment and maintenance. At present, skin is basically detected by a machine, the skin of a user is photographed by image acquisition equipment, then a worker analyzes and processes the picture to obtain a corresponding diagnosis scheme, and the parameters and the light source setting of a camera are the key for comprehensively, truly and accurately photographing the face condition.
Therefore, how to achieve comprehensive, real and accurate photographing of the face of the user to provide a targeted care solution is a challenge to be solved.
Disclosure of Invention
In view of the above technical problem, an embodiment of the present invention provides an image capturing device for skin detection, which is used for accurately capturing a facial image of a user.
the technical scheme adopted by the invention is as follows:
An embodiment of the present invention provides an image capturing device for skin detection, including: the device comprises a fixed seat, an imaging cavity, a light source component, a filter component and a camera;
an embodiment of the present invention provides an image capturing device for skin detection, including: the device comprises a fixed seat, an imaging cavity, a light source component, a filter component and a camera;
the imaging cavity is rotatably arranged on the fixed seat through a rotating mechanism, the front side of the imaging cavity is open and used for placing a face, and an imaging window is formed in the rear side of the imaging cavity;
The light source assembly is arranged in the imaging cavity and comprises three groups of light sources which are formed on two sides of the imaging window and symmetrically arranged from near to far and two groups of light sources which are respectively arranged on the upper side and the lower side of the imaging cavity, wherein the three groups of light sources arranged on the two sides are respectively a UV light source, a polarized light source and a white light source, and the two groups of light sources arranged on the upper side and the lower side are respectively white light sources;
The filter assembly is positioned in front of a camera lens and comprises a filter support and a driving mechanism, the filter support is rotatably arranged on the imaging cavity through the driving mechanism, a light hole and 3 filters are arranged on the filter support, and the filters are respectively a UV filter, a cross polarization filter for generating a cross polarization image and a parallel polarization filter for generating a parallel polarization image;
Wherein, through rotating the filter support rotates different filters and light trap to corresponding to the position of formation of image window and open corresponding light source and realize different light source filter combinations, include: the light source filter assembly comprises a first standard light source filter assembly, a second standard light source filter assembly, a cross polarized light source filter assembly, a parallel polarized light source filter assembly and a UV light source filter assembly, wherein the first standard light source filter assembly consists of a light hole and a white light source, the second standard light source filter assembly consists of the light hole, the polarized light source and the white light source, the cross polarized light source filter assembly consists of the cross polarized light filter and the polarized light source, the parallel polarized light source filter assembly consists of the parallel polarized light filter and the polarized light source, and the UV light source filter assembly consists of the UV filter and the UV light source;
the camera is connected with the rear side of the imaging cavity, rotates along with the rotation of the imaging cavity, and is used for collecting images of the front side, the left side and the right side of the face through the imaging window according to camera parameters corresponding to the light source filter combinations under different light source filter combinations.
optionally, the preset camera parameters include an aperture parameter value, a shutter parameter value, and an ISO parameter value, wherein,
under the first standard light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/60, ISO parameter value is 100;
Under the second standard light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/60, ISO parameter value is 100;
Under the cross polarized light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 100;
Under the combination of the parallel polarized light source filter, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 100;
Under the combination of the UV light source filter, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 1250.
Optionally, the imaging device further comprises an initial position locating device, the initial position locating device is used for locating the initial position of the rotation of the filter assembly when the device is powered on, the initial position locating device comprises a retro-reflection type photoelectric sensor arranged on the imaging cavity and a signal reflection plate arranged on the filter support, and the position of the retro-reflection type photoelectric sensor is an initial alignment position.
Optionally, the UV light source comprises a UV LED lamp and a UV filter disposed at a front side of the UV LED lamp; the polarized light source comprises a white light LED lamp and a polaroid arranged on the front side of the white light LED lamp, and the polarization angle of the polaroid is 0 degree; the white light source comprises a white light LED lamp and a diffuse reflection plate arranged on the front side of the white light LED lamp.
optionally, an included angle between a normal of a plane where the UV light source is located and a plane where the face is located is 60 °, an included angle between a normal of a plane where the polarized light source is located and a plane where the face is located is 45 °, and a normal of a plane where the white light source is located is perpendicular to the plane where the face is located;
The light source intensity of each light source is 5500K, and the distance between each light source and the face is 280 +/-5 mm.
optionally, the cross polarization filter is at 90 ° to the polarized light source and the parallel polarization filter is at 0 ° to the polarized light source.
Optionally, the imaging device further comprises a forehead limiting component and a lower jaw supporting component, wherein the forehead limiting component is movably arranged on the upper side of the imaging cavity, and the lower jaw supporting component is arranged on the fixed seat.
optionally, the center of the forehead limiting piece, the center of the mandible supporting piece and the extension line of the center line of the camera lens intersect with the center lines of the forehead limiting piece and the mandible supporting piece and are located on the same plane, and the plane is perpendicular to the horizontal plane.
Optionally, the inner side of the imaging cavity is formed into a cambered surface; two lighting sources are further arranged on the upper side of the imaging cavity.
Optionally, the rotating mechanism includes an annular guide rail and a slider sliding along the annular guide rail, the annular guide rail is fixed on the fixing seat, one end of the slider is connected with the imaging cavity, the other end of the slider is connected with a driving device installed on the fixing seat through a connecting rod, and the connecting rod drives the slider to slide along the annular guide rail under the driving of the driving device.
According to the image acquisition equipment for skin detection provided by the embodiment of the invention, different filters are arranged in front of the camera lens and different light sources are arranged in the rotatable imaging cavity, so that different light source filter combinations can be formed by the filters and the corresponding light sources, and the images of the front side, the left side and the right side of the face can be accurately acquired by the different light source filter combinations and the rotation of the imaging cavity.
Drawings
Fig. 1 is a schematic structural diagram of an image acquisition device for skin detection according to an embodiment of the present invention;
Fig. 2 is another schematic structural diagram of an image capturing device for skin detection according to an embodiment of the present invention;
Fig. 3 is another schematic structural diagram of an image capturing device for skin detection according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an operation of an image capturing device for skin detection according to an embodiment of the present invention.
Detailed Description
in order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, an embodiment of the present invention provides an image capturing apparatus for skin detection, including: the device comprises a fixed seat 1, an imaging cavity 2, a light source assembly 3, a filter assembly 4 and a camera (not shown). The imaging cavity 2 is rotatably arranged on the fixed seat 1 through a rotating mechanism, the front side of the imaging cavity 2 is open and used for placing a face, and an imaging window 5 is formed at the rear side of the imaging cavity; the light source assembly 3 is arranged in the imaging cavity 2 and comprises three groups of light sources which are formed on two sides of the imaging window 5 and symmetrically arranged from near to far and two groups of light sources which are respectively arranged on the upper side and the lower side of the imaging cavity 2, wherein the three groups of light sources arranged on the two sides are respectively a UV light source 301, a polarized light source 302 and a white light source 303, and the two groups of light sources arranged on the upper side and the lower side are respectively the white light source 303; filter component 4, before being located the camera lens, including filter support and actuating mechanism, the filter support passes through actuating mechanism rotatably sets up on the formation of image cavity, be provided with light trap and 3 filters on the filter support, the filter is the UV filter respectively, is used for producing the cross polarization filter of cross polarization image and is used for producing the parallel polarization filter of parallel polarization image, wherein, through rotating the filter support is rotatory to corresponding to filter and the light trap of difference the position of formation of image window and open corresponding light source and realize different light source filter combinations, include: a first standard light source filter combination, a second standard light source filter combination, a cross polarized light source filter combination, a parallel polarized light source filter combination and a UV light source filter combination, wherein the first standard light source filter combination is composed of the light hole and the white light source 303, the second standard light source filter combination is composed of the light hole, the polarized light source 302 and the white light source 303, the cross polarized light source filter combination is composed of the cross polarized filter and the polarized light source 302, the parallel polarized light source filter combination is composed of the parallel polarized filter and the polarized light source 302, and the UV light source filter combination is composed of the UV filter and the UV light source 301; (ii) a The camera is connected with the rear side of the imaging cavity 2, rotates along with the rotation of the imaging cavity, and is used for collecting images of the front side, the left side and the right side of the face through the imaging window 5 according to camera parameters corresponding to the light source filter combinations under different light source filter combinations.
In a specific embodiment of the present invention, the rotation of the imaging cavity 1, the rotation of the filter holder, and the selective opening of the light source assembly 3 can be controlled by a control instruction sent by an upper computer, so that the camera can acquire images of the front, left, and right sides of the face under different light source filter combinations, that is, the images of each face are acquired for 5 times, and 5 photos are taken in total. In an example, the preset control instruction may include instructing to rotate the filter support according to a preset light source filter combination sequence, so as to rotate the filter or the light hole corresponding to each light source filter combination to a position corresponding to the imaging window, and turn on the corresponding light source and trigger the camera to take a picture, so that accurate acquisition of facial images of the camera under different light source filter combinations sequenced according to a time sequence can be achieved, and the acquired images can be sent to an upper computer to be processed correspondingly. In an example of the present invention, the preset control instruction may include an instruction to rotate the filter holder to switch the filters and turn on the light source assembly according to an order of the first standard light source filter combination, the second standard light source filter combination, the cross polarized light source filter combination, the parallel polarized light source filter combination, and the UV light source filter combination, which is not limited to this, and other different combination orders may be set according to actual situations as long as the facial image can be clearly and comprehensively collected.
in the embodiment of the invention, the inner side of the imaging cavity 2 is formed into a cambered surface, which is beneficial to irradiating light on the face; the upper side of the imaging cavity 2 is also provided with two illumination sources 7, such as LED lamps, for illuminating the imaging cavity before taking a picture in order to adjust the position of the face under the field of view of the camera. The imaging window 5 may be a square opening suitable for camera lens shooting. The imaging cavity 2 can be rotationally connected with the fixed seat 1 through a rotating mechanism. In an example, the rotating mechanism may include an annular guide rail and a slider sliding along the annular guide rail, the annular guide rail is fixed on the fixing seat, one end of the slider is connected with the imaging cavity, the other end of the slider is connected with a driving device installed on the fixing seat through a connecting rod, and the connecting rod drives the slider to slide along the annular guide rail under the driving of the driving device, so as to realize the rotation of the imaging cavity. In one example, the driving device may be a stepping motor, which may be connected to the link by a lead screw. In one example, the maximum angle at which the imaging cavity 2 can be rotated left and right along the circular guide rail can be 35 ° centered on the frontal position, so that image acquisition of the frontal, left and right sides of the face can be achieved.
In an embodiment of the present invention, the UV light source 301 may be implemented by a UV LED lamp and a UV filter, and may specifically include a UV LED lamp disposed on the imaging cavity 2 and a UV filter disposed on a front side of the UV LED lamp, the polarization light source 302 may be implemented by a common white LED lamp and a polarizer, and may specifically include a white LED lamp disposed on the imaging cavity 2 and a polarizer disposed on a front side of the white LED lamp, a polarization angle of the polarizer is 0 degree, the white light source 303 may be implemented by a common white LED lamp and a diffuse reflection plate, and may specifically include a white LED lamp disposed on the imaging cavity 2 and a diffuse reflection plate disposed on a front side of the white LED lamp, and the diffuse reflection plate may make emitted light softer. In one example, an included angle between a normal line of a plane where the UV light source is located and a plane where the face is located is 60 degrees, an included angle between a normal line of a plane where the polarized light source is located and a plane where the face is located is 45 degrees, and a normal line of a plane where the white light source is located is perpendicular to the plane where the face is located; the light source intensity of each light source may be 5500K. The distance of each light source from the face may be approximately equal, in one example, 280 ± 5 mm. In the specific implementation of the invention, because the filter is added in front of the camera lens, the filter is also added in front of the LED lamp, and the included angle between the normal of the plane where each light source is located and the plane where the face is located and the distance between each light source and the face are limited, better shooting effect can be presented.
furthermore, in an embodiment of the present invention, the cross polarization filter is at 90 ° to the polarized light source, and the parallel polarization filter is at 0 ° to the polarized light source.
In addition, the image acquisition equipment of the invention further comprises an initial position positioning device, wherein the initial position positioning device is used for positioning the rotating initial position of the filter support when the equipment is powered on and operates every time, the initial position positioning device comprises a regression reflection type photoelectric sensor arranged on the imaging cavity and a signal reflection plate arranged on the filter support, and the position of the regression reflection type photoelectric sensor is an initial alignment position and can be specifically arranged at the top axis position outside the imaging cavity. In actual operation, when the equipment runs at each power-on, the driving mechanism can rotate the filter support according to a control command, and when the signal reflection plate rotates to pass through the retro-reflection type photoelectric sensor, the retro-reflection type photoelectric sensor can judge that the filter assembly is located at an initial alignment position, so that a signal representing that the signal reflection plate is located at the initial alignment position is sent, and the current operation of the driving mechanism is stopped.
In the embodiment of the invention, the filter support is arranged behind the imaging window, and the distance between the plane where the filter support is located and the plane where the camera lens is located is constant, namely the relative position between the filter support and the camera lens is kept fixed. In a specific example, as shown in fig. 3, the filter holder may be a pentagon structure formed with a circular mounting hole at each corner position, the respective filters may be fixed to the mounting holes by screws or the like, and the signal reflection plate is also mounted to one of the mounting holes. In one example, the driving mechanism for driving the filter holder may be a dc gear motor having a motor shaft connected to the filter holder, and the rotation of the motor shaft rotates the filter holder. When the filter holder is rotated by the dc gear motor, it is possible to detect whether the mounting hole for each switching is located at a position corresponding to the imaging window by the detecting means. In one example, the detection device can include a shutter disposed at an outer edge of each mounting hole and an optoelectronic switch disposed on the imaging cavity, and in a particular example, the optoelectronic switch can be disposed at a location near the imaging window. When a signal representing that the filter assembly is located at an initial alignment position is received, the direct-current speed reduction motor starts to drive the filter support to rotate, when the photoelectric switch detects that the signal is blocked by a first blocking piece, the photoelectric switch can send a signal representing that a mounting hole corresponding to the blocking piece is located at a position corresponding to an imaging window, the direct-current speed reduction motor can stop the operation based on the signal, then after shooting under the light source filter combination is completed, the filter support can be continuously driven to rotate according to a control instruction until the next blocking piece triggers the photoelectric switch, and therefore, shooting of pictures under all the light source filter combination is completed. Because in actual operation, can set up the installation order of filter and light trap according to predetermined light source filter combination order, so, can know that what the separation blade that cuts off photoelectric switch at different moments corresponds is the filter or the light trap to and which filter. However, the drive mechanism may be a motor having an encoder, so that it is possible to determine whether or not the mounting hole for each switching is located at a position corresponding to the imaging window without providing a detection device. In the case of a coding motor, the switching can be controlled by how much rotation is performed with respect to the initial alignment position, for example, in the case of 5 mounting holes, the filter holder can be controlled to rotate counterclockwise or clockwise by 72 ° for every rotation to perform one switching.
In an embodiment of the invention, the preset camera parameters comprise an aperture parameter value, a shutter parameter value and an ISO parameter value, wherein, in one illustrative example: under the first standard light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/60, ISO parameter value is 100; under the second standard light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/60, ISO parameter value is 100; under the cross polarized light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 100; under the combination of the parallel polarized light source filter, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 100; under the combination of the UV light source filter, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 1250. The camera parameters may be adjusted based on actual conditions, for example, according to the intensity of the ambient light and the model of the camera, as long as the adjusted camera parameters can obtain the required picture quality. In one example, the camera of the embodiment of the present invention may be a Canon camera, but may be other cameras as well.
In the specific shooting process, the shooting of the face image can be realized at different light source filter combinations and camera parameters based on the rotation of the imaging cavity, and when the image of one face is shot, the image needs to be shot respectively under 5 light source filter combinations and corresponding camera parameters, so that the face condition can be reflected more accurately and comprehensively.
in an embodiment of the invention, the camera may be fixed to the imaging volume 2 by a fixing bracket 6, as shown in fig. 2 and 3. The fixing bracket 6 may include a connecting portion 601 connected to the imaging cavity 2 and a supporting portion 602 fixed to the connecting portion, a snap ring for fixing the camera lens is formed on the supporting portion 602, and the camera lens is snapped into the snap ring, so that the camera is fixed.
Furthermore, the image capturing device according to the embodiment of the present invention may further include a forehead limiting component 8 and a lower jaw supporting component 9, wherein the forehead limiting component 8 is movably disposed on the upper side of the imaging cavity 2, and the lower jaw supporting component 9 is disposed on the fixing base 1. In one example, the forehead limiting member 8 may include a connecting rod and a limiting member, the connecting rod may be a circular metal rod and fixedly installed at a central position of the imaging cavity 2, the limiting member may include a connecting portion and a contact portion, the connecting portion is movably connected with the metal rod, so that the limiting member can move up and down along the metal rod and rotate around the metal rod, and the fixing on the metal rod may be achieved by a limiting nut. The contact portion is located below the connection portion for contacting with the forehead of the user, and the structure of the contact portion is not particularly limited in the present invention, and any structure capable of limiting the forehead may be implemented, and in one example, the contact portion may be formed in a bar shape having arc-shaped protrusions protruding in the forehead direction at both ends. The lower jaw supporting piece 9 is fixed on the fixed seat 1 and forms a contact surface which is jointed with the lower jaw. In one example, the center of the forehead stop 8, the center of the chin support 9, and the center line extension of the camera lens intersect and are coplanar with the center lines of the forehead stop 8 and the chin support 9, i.e., lie in the same plane, and the plane is perpendicular to the horizontal plane so that the human face is centered in the lens frame.
Further, in the embodiment of the present invention, the image capturing device for skin detection may further include a controller, and the controller is configured to control the operation of the driving mechanism and the driving device and control the selective activation of the light source assembly based on a control instruction sent by the upper computer. In one example, the controller may be a programmable logic controller PLC, which is provided on the holder 1.
In the specific implementation of the image acquisition device for skin detection provided by the invention, the PLC can control the rotation of the filter support to realize the correspondence between the specified mounting hole and the imaging window according to the control instruction of the upper computer and control the corresponding light source to be started, specifically, the PLC can drive the rotation of the imaging cavity by controlling the stepping motor and control the direct current motor to realize the rotation of the filter support, and the camera can take pictures according to the control instruction of the upper computer, and the working principle of the image acquisition device provided by the invention can be shown in FIG. 4. Specifically, after the equipment is powered on for the first time, the PLC can control the filter support to carry out initial position calibration according to the instruction, and after the calibration is finished, the equipment enters a shooting waiting state. When shooting a positive image, a user stretches the head into the imaging cavity, the lower jaw abuts against the lower jaw bearing component, the forehead is in contact with the forehead limiting component, and the forehead limiting component can be adjusted to fit different faces. Then, the PLC switches the filters and turns on corresponding light sources in sequence according to the light source filter combination sequence of the first standard light source filter combination, the second standard light source filter combination, the cross polarized light source filter combination, the parallel polarized light source filter combination and the UV light source filter combination according to the instruction, and the camera takes pictures of the face according to corresponding camera parameters according to the instruction of the upper computer under each light source combination, and takes 5 pictures in total. When the left side image is shot, the PLC controls the imaging cavity to rotate leftwards for 35 degrees for example according to the instruction, then sequentially switches the filters and turns on corresponding light sources according to the light source filter combination sequence of the first standard light source filter combination, the second standard light source filter combination, the cross polarized light source filter combination, the parallel polarized light source filter combination and the UV light source filter combination according to the instruction, and under each light source filter combination, the camera shoots the face according to corresponding camera parameters according to the instruction of an upper computer to shoot 5 photos. When the right side image is shot, the PLC controls the imaging cavity to rotate rightwards according to the instruction, the imaging cavity rotates to a position forming an angle of 35 degrees with the front position, then the filters are sequentially switched and corresponding light sources are started according to the light source filter combination sequence of the first standard light source filter combination, the second standard light source filter combination, the cross polarized light source filter combination, the parallel polarized light source filter combination and the UV light source filter combination according to the instruction, and under each light source filter combination, the camera shoots the face according to corresponding camera parameters according to the instruction of an upper computer, and 5 pictures are shot in total. The shot pictures can be transmitted to the upper computer through the camera for processing by the upper computer.
The above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An image acquisition device for skin detection, characterized by comprising: the device comprises a fixed seat, an imaging cavity, a light source component, a filter component and a camera;
The imaging cavity is rotatably arranged on the fixed seat through a rotating mechanism, the front side of the imaging cavity is open and used for placing a face, and an imaging window is formed in the rear side of the imaging cavity;
The light source assembly is arranged in the imaging cavity and comprises three groups of light sources which are formed on two sides of the imaging window and symmetrically arranged from near to far and two groups of light sources which are respectively arranged on the upper side and the lower side of the imaging cavity, wherein the three groups of light sources arranged on the two sides are respectively a UV light source, a polarized light source and a white light source, and the two groups of light sources arranged on the upper side and the lower side are respectively white light sources;
The filter assembly is positioned in front of a camera lens and comprises a filter support and a driving mechanism, the filter support is rotatably arranged on the imaging cavity through the driving mechanism, a light hole and 3 filters are arranged on the filter support, and the filters are respectively a UV filter, a cross polarization filter for generating a cross polarization image and a parallel polarization filter for generating a parallel polarization image;
Wherein, through rotating the filter support rotates different filters and light trap to corresponding to the position of formation of image window and open corresponding light source and realize different light source filter combinations, include: the light source filter assembly comprises a first standard light source filter assembly, a second standard light source filter assembly, a cross polarized light source filter assembly, a parallel polarized light source filter assembly and a UV light source filter assembly, wherein the first standard light source filter assembly consists of a light hole and a white light source, the second standard light source filter assembly consists of the light hole, the polarized light source and the white light source, the cross polarized light source filter assembly consists of the cross polarized light filter and the polarized light source, the parallel polarized light source filter assembly consists of the parallel polarized light filter and the polarized light source, and the UV light source filter assembly consists of the UV filter and the UV light source;
The camera is connected with the rear side of the imaging cavity, rotates along with the rotation of the imaging cavity, and is used for collecting images of the front side, the left side and the right side of the face through the imaging window according to camera parameters corresponding to the light source filter combinations under different light source filter combinations.
2. the image capturing apparatus according to claim 1, wherein the preset camera parameters include an aperture parameter value, a shutter parameter value, and an ISO parameter value, wherein,
under the first standard light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/60, ISO parameter value is 100;
Under the second standard light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/60, ISO parameter value is 100;
under the cross polarized light source filter combination, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 100;
under the combination of the parallel polarized light source filter, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 100;
under the combination of the UV light source filter, the camera parameters are as follows: aperture parameter value is 14, shutter parameter value is 1/10, ISO parameter value is 1250.
3. The image capturing apparatus according to claim 1, further comprising an initial position locating device for locating an initial position of rotation of the filter assembly at each power-on operation of the apparatus, the initial position locating device including a retro-reflection type photoelectric sensor provided on the imaging cavity and a signal reflection plate provided on the filter holder, the retro-reflection type photoelectric sensor being located at an initial alignment position.
4. The image capturing apparatus of claim 1, wherein the UV light source includes a UV LED lamp and a UV filter disposed in front of the UV LED lamp; the polarized light source comprises a white light LED lamp and a polaroid arranged on the front side of the white light LED lamp, and the polarization angle of the polaroid is 0 degree; the white light source comprises a white light LED lamp and a diffuse reflection plate arranged on the front side of the white light LED lamp.
5. The image acquisition device according to claim 1, wherein an angle between a normal line of a plane where the UV light source is located and a plane where the face is located is 60 degrees, an angle between a normal line of a plane where the polarized light source is located and a plane where the face is located is 45 degrees, and a normal line of a plane where the white light source is located is perpendicular to the plane where the face is located;
The light source intensity of each light source is 5500K, and the distance between each light source and the face is 280 +/-5 mm.
6. the image capture device of claim 1, wherein the cross polarization filter is at 90 ° to the polarized light source and the parallel polarization filter is at 0 ° to the polarized light source.
7. the image capturing device of claim 1, further comprising a forehead support movably disposed at an upper side of the imaging chamber and a mandible support disposed on the mounting.
8. the image capturing apparatus of claim 7, wherein the center of the forehead limiting member, the center of the chin support member, and the center line extension of the camera lens intersect the center lines of the forehead limiting member and the chin support member and are located on the same plane, and the plane is perpendicular to a horizontal plane.
9. The image acquisition device of claim 1, wherein the inside of the imaging cavity is formed as a curved surface; two lighting sources are further arranged on the upper side of the imaging cavity.
10. The image capturing device as claimed in claim 1, wherein the rotating mechanism includes a ring-shaped guide rail and a sliding block sliding along the ring-shaped guide rail, the ring-shaped guide rail is fixed on the fixing base, one end of the sliding block is connected to the imaging cavity, the other end of the sliding block is connected to a driving device installed on the fixing base through a connecting rod, and the connecting rod drives the sliding block to slide along the ring-shaped guide rail under the driving of the driving device.
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