Foot arch recognition imaging structure

Abstract

The utility model relates to the technical field of foot arch recognition, in particular to a foot arch recognition imaging structure which comprises an ultra-wide-angle camera arranged at the bottom of a shielding camera obscura, a standing panel is arranged above the shielding camera obscura, the image acquisition end of the ultra-wide-angle camera is right opposite to the standing panel, and the image acquisition end of the ultra-wide-angle camera is connected with the shielding camera obscura. The edge of the image acquisition range of the ultra-wide angle camera is located on the inner wall of the shielding camera obscura; the height of the standing panel is reduced by arranging the ultra-wide-angle camera, so that a user can conveniently go up and down, and safe and reliable identification and use are ensured; meanwhile, the imaging range of the ultra-wide-angle camera is adjusted, so that the imaging edge of the ultra-wide-angle camera is located on the inner wall of the shielding camera obscura, and therefore it is guaranteed that the final image comprises an image with the periphery being dark and the middle being the sole, and the problem that the imaging quality is poor due to image distortion when the sole is located on the imaging edge is solved; it is further guaranteed that plantar image processing is simpler and more accurate, the recognition precision is guaranteed, and the actual use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of arch recognition, and in particular to an arch recognition imaging structure. Background Art

[0002] The arch structure is elastic. During walking, the arch can absorb and cushion the shock of walking. If the development is not guided correctly, it may lead to poor development of the arch. That is, flat feet. When the bones of children's feet gradually develop into rows and the gaps between the bones decrease, flat feet will be formed permanently. Flat feet will greatly reduce the body's ability to exercise.

[0003] Existing arch recognition devices usually use a telephoto lens, so as to ensure that the captured plantar image is clear and has small edge distortion, thereby ensuring that the captured plantar image is reliable and effective, and thus obtaining accurate recognition results; however, due to the different lengths of human feet, in order to meet the needs of most users, the captured image needs to be able to completely include the sole of the foot, and the use of a telephoto lens will increase the distance between the standing panel and the standing panel, thereby increasing the height of the standing panel, making it inconvenient for the elderly and children to get on and off the standing panel; if the distance between the telephoto lens and the standing panel is reduced, the size of the captured plantar image will be smaller, which can only meet the recognition needs of some users with smaller soles;

[0004] However, if a wide-angle lens is used, for example, the Chinese invention patent with the announcement number CN115474742B provides a method for measuring the arch of the foot and a method for customizing insoles based on the arch coefficient. Images of the soles of the left and right feet are collected by two high-definition image acquisition cameras arranged on the inside of the image acquisition device. At the same time, according to Figures 9 and 10 in the drawings of the patent specification, it can be seen that the image acquisition angles of the camera in the length and width directions used in this solution are between 60° and 90°, that is, a wide-angle lens is used, and the acquisition range of the wide-angle lens is the range of the standing panel.

[0005] Although a wide-angle lens can easily capture the image of the entire sole of the foot, the edges of the wide-angle lens image are severely distorted, which leads to inaccurate results in plantar image recognition and unreliable arch recognition, which cannot meet actual usage requirements. Utility Model Content

[0006] The utility model aims to provide a foot arch recognition imaging structure to solve the problem of edge distortion when the current foot arch recognition equipment collects foot sole images.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A foot arch recognition imaging structure comprises an ultra-wide-angle camera arranged at the bottom of a shielding dark box, a standing panel is arranged above the shielding dark box, an image acquisition end of the ultra-wide-angle camera is opposite to the standing panel, and an edge of the image acquisition range of the ultra-wide-angle camera is located on the inner wall of the shielding dark box.

[0009] It is further defined that the number of the ultra-wide-angle cameras is two, the two ultra-wide-angle cameras are arranged at the same height along the length direction of the shielding darkroom, and the edge of the image acquisition range of the ultra-wide-angle camera is located within the inner wall of the shielding darkroom and the image acquisition range of the other ultra-wide-angle camera.

[0010] It is further defined that the image acquisition angle α of the ultra-wide-angle camera in the length direction of the obstructed dark box is 95° to 105°, and the image acquisition angle β of the ultra-wide-angle camera in the width direction of the obstructed dark box is 95° to 125°.

[0011] It is further defined that the width of the inner wall of the shielding dark box is 2a, then the distance h between the ultra-wide-angle camera and the top of the standing panel satisfies The length of the arch image collected by the ultra-wide-angle camera image collection end in the length direction of the standing panel Where s is the distance between the ultra-wide-angle camera and the corresponding side wall of the shielding dark box, The distance f between the two ultra-wide-angle cameras satisfies

[0012]

[0013] It is further defined that the inner wall of the shielding dark box is provided with a low-reflective layer.

[0014] It is further defined that the standing panel is a one-way light-transmitting glass panel.

[0015] It is further defined that a light strip is provided on the peripheral side of the standing panel.

[0016] It is further defined that an identification base is provided on the outer side of the shielding dark box, and the standing panel is connected to the identification base through a glass pressing edge.

[0017] It is further defined that the long side of the glass edge is connected to the upper end surface of the identification base, the short side of the glass edge extends vertically downward to the upper end surface of the standing panel, the glass edge is arranged around the peripheral side of the standing panel, and the outer side of the corner of the glass edge is a downward inclined slope.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] 1. The utility model lowers the height of the standing panel by setting an ultra-wide-angle camera, which is convenient for users to get on and off and ensures safe and reliable recognition; at the same time, the imaging range of the ultra-wide-angle camera is adjusted so that the imaging edge of the ultra-wide-angle camera is located on the inner wall of the shielding dark box, thereby ensuring that the final image includes an image with the sole of the foot in the middle which is pitch black all around, avoiding the problem of poor imaging quality due to image distortion when the sole of the foot is located at the edge of the imaging, further ensuring that the processing of the sole image is simpler and more accurate, ensuring recognition accuracy, and meeting actual use needs.

[0020] 2. The utility model collects images of the soles of the left and right feet respectively by setting two ultra-wide-angle cameras, and avoids the sole images being located at the edge of the imaging by adjusting the layout positions of the two ultra-wide-angle cameras, thereby ensuring stable and reliable imaging.

[0021] 3. The utility model sets a low-reflective layer on the inner wall of the shielding dark box, thereby facilitating the distinction between the sole image and the edge image, thereby improving the accuracy of image processing; by setting the standing panel as a one-way light-transmitting glass, the influence of the external light of the shielding dark box on the imaging is further avoided, while ensuring that the ultra-wide-angle camera can clearly capture the sole image, thereby improving the imaging quality and the recognition accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the disassembled structure of the utility model;

[0023] Figure 2 Schematic diagram of imaging of the ultra-wide-angle camera of the utility model in the length direction, a is a schematic diagram of imaging of two ultra-wide-angle cameras in the length direction, and b is a schematic diagram of the image range collected by the two ultra-wide-angle cameras on the standing panel;

[0024] Figure 3 This is a schematic diagram of imaging in the width direction of the ultra-wide-angle camera of the utility model;

[0025] Figure 4 This is a schematic diagram of the glass edge pressing structure of the utility model;

[0026] In the figure: 10-identification base; 11-standing panel; 20-ultra-wide-angle camera; 30-shielding dark box; 31-low-reflective layer; 40-glass edge; 41-edge connection hole; 50-light strip; 60-assembly base. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0028] Example 1

[0029] refer to Figure 1 The present embodiment provides an arch recognition imaging structure, including a shielding dark box 30, an ultra-wide-angle camera 20 and a standing panel 11, wherein the ultra-wide-angle camera 20 is arranged at the bottom of the shielding dark box 30, and the standing panel 11 is arranged above the shielding dark box 30. The image acquisition end of the ultra-wide-angle camera 20 is arranged vertically upward and directly opposite to the standing panel 11, so as to collect the image of the sole of the foot on the standing panel 11.

[0030] Specifically, the edge of the image acquisition range of the ultra-wide-angle camera 20 is located at the inner wall of the shielding dark box 30, and the inner wall of the shielding dark box 30 is provided with a low-reflective layer 31, for example, a nylon fiber flocking material can be selected, so that the imaging side of the ultra-wide-angle camera 20 is the black or dark light content of the inner wall of the shielding dark box 30, and the middle of the imaging of the ultra-wide-angle camera 20 is the image of the sole of the foot with obvious lighting on the standing panel 11, thereby avoiding the problem of distortion caused by the sole image being located at the edge of the imaging, ensuring the recognition accuracy while meeting the image acquisition of the soles of general sizes; at the same time, it can also reduce the distance between the ultra-wide-angle camera 20 and the standing panel 11, which is convenient for users to get on and off, and meets the usage needs of different age groups.

[0031] To further illustrate, the number of ultra-wide-angle cameras 20 can be selected as one or two. When the number of ultra-wide-angle cameras 20 is one, one ultra-wide-angle camera 20 captures images of the soles of the two feet on the standing panel 11, and the distance between the two feet of the user needs to be reduced; preferably, the number of ultra-wide-angle cameras 20 is two. At this time, the two ultra-wide-angle cameras 20 are arranged left and right along the length direction of the shielding darkroom 30, and the two left and right cameras are arranged at the same height to ensure that the image acquisition conditions and range are the same. The two ultra-wide-angle cameras 20 respectively capture images of the soles of the left and right feet, which is convenient for acquisition and processing.

[0032] At this time, the edge of the image acquisition range of the ultra-wide-angle camera 20, that is, the inner wall of the shielding darkroom 30 is also located in the image acquisition range of another ultra-wide-angle camera 20. The image portion located within the image acquisition range of the other ultra-wide-angle camera 20 is regarded as the image edge portion and can also be discarded, thereby ensuring that the sole image captured by the ultra-wide-angle camera 20 is not distorted.

[0033] The ultra-wide-angle camera 20 is detachably connected to the bottom of the shielding dark box 30 via an assembly base 60, which is convenient for subsequent disassembly and replacement.

[0034] To further illustrate, the image acquisition angle α of the ultra-wide-angle camera 20 in the length direction of the shielding dark box 30 is 95°~105°, and the image acquisition angle β of the ultra-wide-angle camera 20 in the width direction of the shielding dark box 30 is 95°~125°, taking α=100° and β=120° as an example for illustration.

[0035] refer to Figure 2 , the standing panel 11 is arranged above the shielding dark box 30. Usually, the area of ​​the standing panel 11 is larger than that of the shielding dark box 30. Therefore, the inner wall length of the shielding dark box 30 is set to 414 mm, and the inner wall width is set to 324 mm = 2a. The height h between the image acquisition end of the ultra-wide-angle camera 20 and the top of the standing panel 11 is selected to meet Therefore, the height h=175 mm between the image acquisition end of the ultra-wide-angle camera 20 and the top of the standing panel 11 is taken as an example for explanation.

[0036] The distance f between the two ultra-wide-angle cameras 20 satisfies That is, tan40°×175mm=208.56mm<f<2×208.56mm=417.12mm. At this time, f=220mm is selected as an example for explanation.

[0037] The distance between the left ultra-wide-angle camera and the left side panel of the shielding dark box 30 is equal to the distance between the right ultra-wide-angle camera and the right side panel of the shielding dark box 30 and both are s, wherein the spacing s between the ultra-wide-angle camera 20 and the corresponding side panel satisfies That is, s<tan40°×175mm=208mm, and s=147mm is selected as an example for explanation.

[0038] refer to Figure 2 a in the figure. At this time, the imaging length c of the single ultra-wide-angle camera 20 in the length direction of the top of the standing panel 11 is c=s+tan(α / 2)×h=147mm+tan40°×175mm=355.6mm, that is, the length of the picture collected by the left ultra-wide-angle camera includes the length between the left side of the ultra-wide-angle camera and the corresponding side panel of 147mm and the entire imaging range of 208.6mm on its right side; the corresponding length of the picture collected by the right ultra-wide-angle camera includes the length between the right side of the ultra-wide-angle camera and the corresponding side panel of 147mm and the entire imaging range of 208.6m on its left side.

[0039] It can be seen that the imaging length of a single ultra-wide-angle camera 20 at the top of the standing panel 11 is 355.6 mm, and the imaging width of a single ultra-wide-angle camera 20 at the top of the standing panel 11 matches the width of the shielding dark box 30. The width of the inner wall of the shielding dark box 30 is 324 mm. Therefore, the imaging widths of the two ultra-wide-angle cameras 20 at the top of the standing panel 11 are both 324 mm.

[0040] Further explanation, in the length direction:

[0041] refer to Figure 2 In b, on the one hand, since the imaging length of the left ultra-wide-angle camera on its left side is theoretically 208.6mm, but since the spacing between it and the corresponding side panel is 147mm, the imaging edge of the left ultra-wide-angle camera on its left side exceeds the left edge of the standing panel 11, and the image acquisition end of the left ultra-wide-angle camera obtains the picture content of the black side wall of the dark box 30, and later on, by cutting off this part of the picture, the influence of the imaging distortion of the left edge of the left ultra-wide-angle camera on the arch image can be avoided; similarly, the distortion of the imaging of the right edge of the right ultra-wide-angle camera can also be avoided.

[0042] On the other hand, there is an overlapping area between the right image of the left ultra-wide-angle camera and the left image of the right ultra-wide-angle camera. In actual work, choose to crop the picture outside the midline of the overlapping area. For example, the picture of the overlapping part of the right side of the left ultra-wide-angle camera and the left side of the left ultra-wide-angle camera is cropped, that is, the picture on the right edge of the image captured by the left ultra-wide-angle camera is cropped, and half of the picture in the overlapping area is retained, thereby avoiding the distortion of the right edge of the imaging of the left ultra-wide-angle camera; similarly, the left area of ​​the overlapping picture on the left side of the right ultra-wide-angle camera can also be cropped to avoid the distortion of the left side imaging of the right ultra-wide-angle camera.

[0043] refer to Figure 3 , in the width direction:

[0044] That is, the imaging distortion of the ultra-wide-angle camera 20 in the front and rear directions, the image acquisition angle of the ultra-wide-angle camera 20 in the width direction of the shielding dark box 30 is 120°, and through calculation, it can be known that the actual imaging size is 2×tan60°×175mm=606mm, which is much larger than the width of the shielding dark box 30. By cropping the black image of the side wall of the shielding dark box 30 that is captured beyond the top port of the shielding dark box 30, the captured image of the standing panel 11 is retained. At this time, the image acquisition size of the ultra-wide-angle camera 20 in the width direction of the shielding dark box 30 is the inner wall width of the port of the shielding dark box 30, thereby avoiding the influence of the front and rear edges of the sole of the foot on the imaging after imaging, further improving the imaging quality, and reducing the height of the identification base 10 for easy identification and use.

[0045] To further explain, the standing panel 11 is a one-way light-transmitting glass panel, and the reflective surface of the standing panel 11 is arranged upward. During identification, the user stands on the reflective surface of the standing panel 11, so that the user standing on the standing panel 11 can see the reflected content of the outside world but cannot see the inside of the obstructed dark box 30, thereby avoiding the panic of children standing on the transparent glass; at the same time, it can also avoid the influence of the external environment on the imaging, further improving the imaging quality.

[0046] A light strip 50 is further provided on the peripheral side of the standing panel 11 , and the light strip 50 can provide green light with a wavelength of 620nm-630nm, thereby further improving the imaging quality.

[0047] In order to avoid the standing panel 11 directly contacting the shielding dark box 30 and increasing the structural strength requirements of the shielding dark box 30 and thus increasing the cost, it is preferred to set an identification base 10 on the outside of the shielding dark box 30, and the standing panel 11 is connected to the identification base 10 through a glass pressing edge 40.

[0048] refer to Figure 4 The bottom end surface edge of the standing panel 11 can be selectively in contact with the identification base 10, or a support frame can be set in the identification base 10, and the standing panel 11 is connected to the identification base 10 through the support frame; the cross-section of the glass edge 40 is an L-shaped structure, the long side of the glass edge 40 covers the top end surface of the identification base 10, and the short side of the glass edge 40 is bent downward and extends to the top end surface of the standing panel 11. A edge connection hole 41 is opened on the long side of the glass edge 40, and the edge connection hole 41 is connected to the top end surface of the identification base 10 through screws, so that the standing panel 11 and the identification base 10 are stably connected above the shielding dark box 30.

[0049] The identification base 10 can be further configured as a stepped structure to facilitate the person to be inspected to step onto the standing panel 11 and to facilitate children to get on and off.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foot arch recognition imaging structure, characterized in that: The invention comprises an ultra-wide-angle camera (20) arranged at the bottom of a shielding dark box (30), a standing panel (11) being arranged above the shielding dark box (30), an image acquisition end of the ultra-wide-angle camera (20) facing the standing panel (11), and an edge of the image acquisition range of the ultra-wide-angle camera (20) being located on the inner wall of the shielding dark box (30).

2. The arch recognition imaging structure according to claim 1, characterized in that: The number of the ultra-wide-angle cameras (20) is two, and the two ultra-wide-angle cameras (20) are arranged at the same height along the length direction of the shielding dark box (30), and the edge of the image acquisition range of the ultra-wide-angle camera (20) is located within the inner wall of the shielding dark box (30) and the image acquisition range of the other ultra-wide-angle camera (20).

3. The arch recognition imaging structure according to claim 2, characterized in that: The image acquisition angle α of the ultra-wide-angle camera (20) in the length direction of the shielding dark box (30) is 95° to 105°, and the image acquisition angle β of the ultra-wide-angle camera (20) in the width direction of the shielding dark box (30) is 95° to 125°.

4. The arch recognition imaging structure according to claim 3, characterized in that: The inner wall width of the shielding dark box (30) is 2a, and the distance h between the ultra-wide-angle camera (20) and the top of the standing panel (11) satisfies The length of the arch image collected by the image collection end of the ultra-wide-angle camera (20) in the length direction of the standing panel (11) Where s is the distance between the ultra-wide-angle camera (20) and the corresponding side wall of the shielding dark box (30), The distance f between the two ultra-wide-angle cameras (20) satisfies 5. The arch recognition imaging structure according to claim 4, characterized in that: The inner wall of the shielding dark box (30) is provided with a low-reflective layer (31).

6. The arch recognition imaging structure according to any one of claims 1 to 5, characterized in that: The standing panel (11) is a one-way light-transmitting glass panel.

7. The arch recognition imaging structure according to claim 6, characterized in that: A light strip (50) is arranged on the peripheral side of the standing panel (11).

8. The arch recognition imaging structure according to any one of claims 1 to 5, characterized in that: An identification base (10) is arranged on the outside of the shielding dark box (30), and the standing panel (11) is connected to the identification base (10) via a glass pressing edge (40).

9. The arch recognition imaging structure according to claim 8, characterized in that: The long side of the glass edge (40) is connected to the upper end surface of the identification base (10), and the short side of the glass edge (40) extends vertically downward to the upper end surface of the standing panel (11). The glass edge (40) is arranged around the circumference of the standing panel (11), and the outer side of the corner of the glass edge (40) is a downwardly inclined slope.

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