Rotary multispectral facial image acquisition device

Abstract

The utility model discloses a rotary multispectral facial image acquisition device, which belongs to the technical field of image acquisition and comprises a base, a light shield, a chin support, a forehead frame and a shooting component. The light shield has a degree of freedom of moving along the track; the shooting assembly is arranged in the face containing cavity and used for collecting face image information. The light shield comprises the base shell and the two movable shells capable of rotating reversely, when face collection is not carried out, the two movable shells are overlapped on the base shell, the opening of the face containing cavity is large, a user can put the chin on the chin support, the forehead abuts against the forehead frame, and therefore the user can position the head in a relaxed mode, and the face collection effect is good. When face collection is carried out, the two movable shells rotate reversely, the head of a user is covered, external light is shielded, the light shield can rotate around the face of the user during collection, the user does not need to rotate the head, and the use experience is good.

Description

Technical Field

[0001] This utility model relates to the field of image acquisition technology, specifically to a rotating multispectral facial image acquisition device. Background Technology

[0002] Facial multispectral image acquisition technology has broad application prospects in fields such as medical aesthetics, skin detection, and identity recognition. By capturing the absorption, reflection, or scattering characteristics of the face under different wavelengths of light (including sunlight, polarized light, and UV light), this technology can provide richer and more in-depth biometric information than conventional RGB images, such as key details like subcutaneous blood vessel distribution, pigmentation status, and skin microstructure.

[0003] Current equipment for facial multispectral image acquisition typically requires specific, controlled ambient lighting conditions to obtain stable, high-quality images. This is primarily because fluctuations in ambient light, stray light interference, and specular highlights caused by facial oils can severely impact the image's signal-to-noise ratio, consistency, and detail resolution. To overcome ambient light interference, a common technical solution is to use a darkroom structure. Users must insert their heads through a narrow opening into a fixed, enclosed internal space to locate and adjust the position of their chin and forehead for accurate positioning. This process often feels cramped, inconvenient, and even stressful for users. Since the camera doesn't move during acquisition, users must turn their heads left and right to complete the facial capture, resulting in a poor user experience. Utility Model Content

[0004] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a rotating multispectral facial image acquisition device, which facilitates head positioning and light shielding.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a rotating multispectral facial image acquisition device, comprising:

[0006] A base, on which a track is provided;

[0007] A light shield, the light shield having the freedom to move along a track, and a face-receiving cavity provided on the inner side of the light shield;

[0008] The chin rest is fixed to the base and located within the facial cavity;

[0009] The forehead support is set within the facial cavity via a bracket.

[0010] The camera module, located within the face cavity, is used to capture facial image information.

[0011] The light shield includes a base shell and two movable shells rotatably mounted on the base shell. The two movable shells rotate in opposite directions on the base shell and cooperate with the base shell to form a cover with an open bottom.

[0012] Preferably, the two movable shells are a first movable shell and a second movable shell, the top of the base shell is provided with a first through hole, the top of the first movable shell is fixed with a first rotating shaft passing through the first through hole; the top of the first movable shell is provided with a second through hole passing through the first rotating shaft, and the top of the second movable shell is fixed with a second rotating shaft passing through the second through hole.

[0013] Preferably, a first gear is fixed to the end of the first rotating shaft, a second gear is fixed to the end of the second rotating shaft, and a first driving mechanism for driving the first gear and the second gear to rotate in opposite directions is provided inside the base shell.

[0014] Preferably, the first driving mechanism includes:

[0015] The first motor is fixed inside the base shell;

[0016] The third gear is fixed on the output shaft of the first motor and meshes with the first gear;

[0017] The fourth gear is rotatably mounted inside the base housing and meshes with the third gear and the second gear.

[0018] Preferably, a protective cover for covering the first gear, the second gear, and the first drive mechanism is fixed inside the base shell.

[0019] Preferably, the outer circumferential wall of the first rotating shaft and the inner wall of the first through hole are respectively provided with a first annular groove and a second annular groove; an elastic retaining ring is sleeved inside the first annular groove, and when the first annular groove is aligned with the second annular groove, the elastic retaining ring simultaneously abuts against the first annular groove and the second annular groove.

[0020] Preferably, the end of the elastic retaining ring near the chin rest has a conical surface.

[0021] Preferably, the track is circular, and the axis of the track coincides with the axis of the first rotating shaft and the axis of the second rotating shaft; a slider is fixed on the base shell and slidably installed in the track, and a second driving mechanism for driving the slider to move along the track is provided in the base.

[0022] Preferably, the second drive mechanism includes:

[0023] The second motor is fixed inside the base, and the base has a mounting cavity that communicates with the track.

[0024] The fifth gear is rotatably installed in the mounting cavity, and the second motor drives the fifth gear to rotate. The slider has teeth that mesh with the fifth gear.

[0025] Preferably, the shooting component includes:

[0026] The light source is fixed on the inner wall of the base shell;

[0027] A high-definition camera is fixed to the inner wall of the base shell;

[0028] The polarizer is mounted on the inner wall of the substrate.

[0029] The beneficial effects of this utility model are as follows:

[0030] This invention features a light shield comprising a base shell and two reversibly rotatable shells. When not capturing facial images, the two shells overlap the base shell, creating a large opening in the facial cavity. Users can place their chin on a chin rest and their forehead against a forehead brace, allowing for a more relaxed head positioning. During facial capture, the two shells rotate in opposite directions, covering the user's head and blocking external light. An internal light source illuminates the user's face, allowing a high-definition camera to capture an image. The light shield moves along a track, enabling the high-definition camera to move and capture a complete image of the user's face without requiring the user to turn their head. This results in more accurate image capture and a better user experience. Furthermore, the polarizer in this invention filters out highlights reflected from facial oils, making the facial images captured by the high-definition camera clearer and more detailed. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A three-dimensional view of the overall structure of a rotating multispectral facial image acquisition device provided for an embodiment of this utility model.

[0033] Figure 2 This is a front view of the overall structure of this utility model.

[0034] Figure 3 This is a top-view perspective view of the two movable shells of this utility model combined with the base shell to form a cover.

[0035] Figure 4 This is a perspective view taken from below when the two movable shells of this utility model are combined with the base shell to form a cover.

[0036] Figure 5 This is a top view of the overall structure of this utility model.

[0037] Figure 6 for Figure 5 Sectional view at point AA.

[0038] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0039] Figure 8 for Figure 5 Sectional view at point BB.

[0040] Figure 9 for Figure 8 A magnified view of a portion of point A in the middle.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Base, 2. Sunshade, 21. Base shell, 22. First movable shell, 221. First rotating shaft, 222. First gear, 223. First annular groove, 224. Second annular groove, 225. Elastic retaining ring, 23. Second movable shell, 231. Second rotating shaft, 232. Second gear, 3. Chin rest, 4. Forehead bracket, 5. Stand, 6. Shooting assembly, 61. Light source, 62. High-definition camera, 63. Polarizing filter, 7. First drive mechanism, 71. First motor, 72. Third gear, 73. Fourth gear, 8. Protective cover, 9. Slider, 10. Second motor, 11. Fifth gear, 12. Tooth pattern. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] Example 1

[0045] like Figures 1 to 9 As shown, Embodiment 1 of this utility model provides a rotating multispectral facial image acquisition device for high-precision acquisition of facial image information, including a base 1, a light shield 2, a chin rest 3, a forehead bracket 4, and a shooting component 6. The base 1 serves as the bottom support for the entire device, and an arc-shaped track is provided on it.

[0046] The sunshade 2 has the freedom to move along a track on the base 1, allowing it to move around the user's face. An internal face-receiving cavity is formed within the sunshade 2 to accommodate the user's face. The sunshade 2 includes a base shell 21 as the main body and two movable shells rotatably mounted on the base shell 21. These two movable shells are designed to rotate in opposite directions on the base shell 21; that is, when one rotates clockwise, the other rotates counterclockwise. Therefore, as... Figure 1 As shown, in the non-working state, or during the user positioning phase, the two movable shells can retract towards each other to provide a larger opening, allowing the user to easily place their face into the face-receiving cavity; as Figure 3 and Figure 4 As shown, when facial image acquisition is required, the two movable shells rotate and unfold in opposite directions, and together with the base shell 21, they form a complete cover with an open bottom, effectively wrapping the user's head and blocking external ambient light.

[0047] The chin rest 3 is fixedly mounted on the base 1 and positioned within the facial cavity formed by the light shield 2. Its function is to support and position the user's chin, providing a vertical positioning reference for the head. The forehead support 4 is fixed inside the facial cavity via a bracket 5 structure, located above the chin rest 3, and is used to assist in horizontally supporting the user's forehead, ensuring a stable head posture during image acquisition.

[0048] The imaging component 6 is also integrated into the inner wall of the face receiving cavity for directly acquiring multispectral image information of the user's face. The imaging component 6 includes at least a light source 61 for providing controllable illumination, a high-definition camera 62 for capturing images, and a polarizer 63 for optimizing image quality. The light source 61 can be LED beads with filters, symmetrically arranged on the inner walls of the base shell 21 on both sides of the high-definition camera 62 to uniformly illuminate the user's face. The polarizer 63 is positioned in front of the high-definition camera 62 and has both vertical and horizontal polarization effects, effectively filtering out specular reflections of highlights caused by facial oils, making facial details (such as texture and blemishes) captured by the high-definition camera 62 clearer and more delicate.

[0049] Workflow: The subject first places their chin on the fixed chin rest 3 and their forehead against the forehead bracket 4 to stabilize their head position. At this time, the movable outer shell of the light shield 2 is in a retracted state for easy positioning. The operator starts the image analysis software on the computer and registers the user information. When ready to collect data, the two movable outer shells of the light shield 2 rotate in opposite directions and unfold synchronously, forming a relatively enclosed facial containment environment with the base shell. At the same time, the internal light source 61 is turned on to provide stable illumination. Subsequently, the software sends instructions to the circuit control board, which precisely controls the switching of the specific mode LED light source 61 (including UV light and vertical / horizontal polarized light) and triggers the autofocus high-definition camera 62 to take pictures at preset time intervals (default is three seconds / frame, customizable). Simultaneously, the entire light shield 2 moves slowly along the track of the base 1, allowing the high-definition camera 62 to take pictures around the user's head in a circumferential or specific angle, fully covering the left, center, right, and other sides of the face to obtain high-quality multi-angle images. The enclosed structure and moving shooting method effectively reduce external ambient light interference, ensuring image consistency and accuracy. All photos taken are automatically saved on the computer. The software performs image processing on them (including panning, zooming, diameter measurement, area measurement, etc.), combines quantitative and qualitative analysis to generate diagnostic results, and finally outputs them through a printer.

[0050] Example 2

[0051] Based on Embodiment 1, this embodiment further designs the driving method of the light shield 2. For ease of distinction, the two movable shells are referred to as the first movable shell 22 and the second movable shell 23, respectively. A first through hole is formed at the top of the base shell 21. A first rotating shaft 221 is fixedly connected to the top of the first movable shell 22, and the first rotating shaft 221 directly passes through and rotatably fits into the first through hole. A second through hole is formed in the central region of the first rotating shaft 221. A second rotating shaft 231 is fixedly connected to the top of the second movable shell 23, and the second rotating shaft 231 coaxially passes through the second through hole, thus achieving a nested relationship between the two. This allows the first movable shell 22 to rotate relative to the base shell 21 around its own first rotating shaft 221, while the second movable shell 23 rotates relative to both the first movable shell 22 and the base shell 21 around its own second rotating shaft 231.

[0052] like Figure 8 and Figure 9As shown, a first annular groove 223 is formed on the outer circumferential wall of the first rotating shaft 221. Simultaneously, a second annular groove 224 is formed on the inner wall of the first through hole. First, a retaining ring with elastic deformation capability is fitted into the first annular groove 223. When the first rotating shaft 221 is installed in place, the first annular groove 223 and the second annular groove 224 are precisely radially aligned. At this time, the retaining ring is engaged in the annular groove space formed by the first annular groove 223 and the second annular groove 224. Under its own elastic force, both ends of the retaining ring simultaneously abut against the inner walls of the first annular groove 223 and the second annular groove 224, thereby axially locking the first rotating shaft 221 onto the base shell 21, preventing it from moving up and down or loosening during operation, while not hindering the rotational movement of the first rotating shaft 221 within the first through hole. To facilitate the smooth insertion of the retaining ring into the first through hole along with the first rotating shaft 221 during installation, a tapered surface or chamfer is machined on one end of the elastic retaining ring 225 near the lower chin support 3 for guidance. This can play a guiding role during assembly, making it easier to press the retaining ring into the mating position.

[0053] To achieve precise synchronous reverse driving of the two movable shells, a first drive mechanism 7 is provided inside the base shell 21. A first gear 222 is fixedly installed at the end of the first rotating shaft 221 that extends into the interior space of the light shield 2. A second gear 232 is fixedly installed at the end of the second rotating shaft 231 that extends into the interior space of the light shield 2. The first drive mechanism 7 includes a first motor 71 that is stably mounted on the inner wall of the base shell 21. A third gear 72 is fixedly installed on the output shaft of the first motor 71. At the same time, a fourth gear 73 is rotatably mounted inside the base shell 21. The fourth gear 73 meshes with both the third gear 72 and the second gear 232. Since the third gear 72 also meshes with the first gear 222, the first motor 71 drives the first gear 222 to rotate through the third gear 72, thereby driving the first movable shell 22 to rotate. At the same time, the third gear 72 also drives the fourth gear 73 that meshes with it, and the fourth gear 73 drives the second gear 232 that meshes with it, thereby driving the second movable shell 23 to rotate. Due to the change in the transmission direction during gear meshing, it can be ensured that the first movable housing 22 and the second movable housing 23 achieve the required synchronous reverse rotation.

[0054] To prevent hair or other foreign objects from getting into or contaminating the gear transmission components, a protective cover 8 is fixedly installed inside the base shell 21. The protective cover 8 completely encloses the first gear 222, the second gear 232, and the first drive mechanism 7, ensuring the cleanliness and operational safety of the internal mechanical structure.

[0055] Example 3

[0056] Based on Embodiments 1 and 2, this embodiment further elaborates on the overall moving mechanism of the light shield 2. The track on the base 1 is designed as a ring, and the geometric axis of this ring track coincides with the rotation axes of the first rotating shaft 221 and the second rotating shaft 231 in Embodiment 2. An arc-shaped slider 9 is fixedly installed on the inner bottom surface of the base shell 21. The slider 9 can slide along the track. A second drive mechanism specifically designed to drive the slider 9 to move along the ring track is installed inside the base 1.

[0057] like Figure 6 and Figure 7 As shown, the second drive mechanism includes a second motor 10 fixed inside the base 1. The base 1 has a mounting cavity that communicates with the inner space of the track. A fifth gear 11 is rotatably mounted inside the mounting cavity. The output shaft of the second motor 10 directly drives the fifth gear 11 to rotate via a coupling or other transmission structure. Simultaneously, teeth 12 that mesh with the fifth gear 11 are machined on the side of the slider 9 facing the mounting cavity. When the second motor 10 starts and drives the fifth gear 11 to rotate, the fifth gear 11 generates a thrust or pull force through the meshing teeth 12, thereby pushing the entire slider 9, along with the light shield 2 fixed thereon, to move continuously along the circular track.

[0058] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A rotating multispectral facial image acquisition device, characterized in that, include: A base, on which a track is provided; A light shield, the light shield having the freedom to move along a track, and a face-receiving cavity provided on the inner side of the light shield; The chin rest is fixed to the base and located within the facial cavity; The forehead support is set within the facial cavity via a bracket. The camera module, located within the face cavity, is used to capture facial image information. The light shield includes a base shell and two movable shells rotatably mounted on the base shell. The two movable shells rotate in opposite directions on the base shell and cooperate with the base shell to form a cover with an open bottom.

2. The rotating multispectral facial image acquisition device as described in claim 1, characterized in that, The two movable shells are a first movable shell and a second movable shell. The top of the base shell is provided with a first through hole. The top of the first movable shell is fixed with a first rotating shaft passing through the first through hole. The top of the first movable shell is provided with a second through hole passing through the first rotating shaft. The top of the second movable shell is fixed with a second rotating shaft passing through the second through hole.

3. The rotating multispectral facial image acquisition device as described in claim 2, characterized in that, A first gear is fixed to the end of the first rotating shaft, and a second gear is fixed to the end of the second rotating shaft. A first driving mechanism for driving the first gear and the second gear to rotate in opposite directions is provided inside the base shell.

4. The rotating multispectral facial image acquisition device as described in claim 3, characterized in that, The first driving mechanism includes: The first motor is fixed inside the base shell; The third gear is fixed on the output shaft of the first motor and meshes with the first gear; The fourth gear is rotatably mounted inside the base housing and meshes with the third gear and the second gear.

5. The rotating multispectral facial image acquisition device as described in claim 4, characterized in that, The inner side of the base shell is fixed with a protective cover for covering the first gear, the second gear and the first drive mechanism.

6. The rotating multispectral facial image acquisition device as described in claim 2, characterized in that, The outer circumferential wall of the first rotating shaft and the inner wall of the first through hole are respectively provided with a first annular groove and a second annular groove; an elastic retaining ring is sleeved inside the first annular groove, and when the first annular groove and the second annular groove are aligned, the elastic retaining ring simultaneously abuts against the first annular groove and the second annular groove.

7. The rotating multispectral facial image acquisition device as described in claim 6, characterized in that, The elastic retaining ring has a conical surface at the end near the chin rest.

8. The rotating multispectral facial image acquisition device as described in claim 2, characterized in that, The track is circular, and the axis of the track coincides with the axis of the first rotating shaft and the axis of the second rotating shaft; a slider is fixed on the base shell and slidably installed in the track, and a second driving mechanism for driving the slider to move along the track is provided in the base.

9. The rotating multispectral facial image acquisition device as described in claim 8, characterized in that, The second drive mechanism includes: The second motor is fixed inside the base, and the base has a mounting cavity that communicates with the track. The fifth gear is rotatably installed in the mounting cavity, and the second motor drives the fifth gear to rotate. The slider has teeth that mesh with the fifth gear.

10. The rotating multispectral facial image acquisition device as described in claim 1, characterized in that, The imaging component includes: The light source is fixed on the inner wall of the base shell; A high-definition camera is fixed to the inner wall of the base shell; The polarizer is mounted on the inner wall of the substrate.

Images