Camera correction device
By designing a camera correction device including a light source, a base plate, a rotating plate and a positioning structure, the problem of traditional correction methods being affected by human factors is solved, and the consistency and efficiency of the camera correction effect are achieved.
Patent Information
- Application Number
- CN202421970389.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The traditional white balance correction and flat-field equalization methods are easily affected by human factors, resulting in poor consistency of correction effects.
A camera correction device is designed, including a light source, a base plate, a rotary plate and a positioning structure. By placing the camera at the opposing light hole position on the rotating plate and rotating the rotating plate, the first positioning part and the second positioning part are aligned, thereby aligning the light transmitting hole and the opposing light hole, ensuring that the light source position and the camera position are consistent.
It improves the consistency of camera correction effects, reduces the probability of problems such as inconsistent light source position, inconsistent calibration reference and manual operation error, and ensures the consistency of flat field correction and white balance effects of multiple camera products.
Smart Images
Figure CN223024487U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of camera calibration, and particularly relates to a camera calibration device. Background Art
[0002] In modern image processing technology, white balance correction and flat field equalization are very important steps, which directly affect the quality of the final image. Especially in application scenarios that require high-precision imaging, such as industrial inspection, medical imaging, scientific research and other fields, it is crucial to ensure accurate image color and uniform brightness.
[0003] Traditional white balance correction and flat field equalization usually rely on the method of manually holding the camera, that is, the operator needs to manually align the camera with a standard white or gray reference board, or a specific flat field equalization light source, to obtain a reference image for calibration.
[0004] However, the above method is easily affected by human factors, and the consistency of the calibration effect is not good. Summary of the Utility Model
[0005] The main purpose of the utility model is to provide a camera calibration device, aiming to improve the consistency of the camera calibration effect.
[0006] To achieve the above purpose, an embodiment of the utility model proposes a camera calibration device, which includes:
[0007] A light source;
[0008] A bottom plate, arranged on one side of the light source, and the bottom plate is provided with a light-transmitting hole;
[0009] A rotating plate, rotatably arranged on the bottom plate along a rotation axis, and the rotating plate is provided with a light-aligning hole. The distances from the centers of the light-transmitting hole and the light-aligning hole to the rotation axis are equal; and
[0010] A positioning structure, including a first positioning part arranged on the bottom plate and a second positioning part arranged on the rotating plate. Rotate the rotating plate so that the first positioning part and the second positioning part are aligned to align the light-transmitting hole and the light-aligning hole.
[0011] In an embodiment, the first positioning part is configured as a first positioning hole, the second positioning part is configured as a second positioning hole, and the distances from the centers of the first positioning hole and the second positioning hole to the rotation axis are equal.
[0012] In an embodiment, a plurality of light-aligning holes are arranged at intervals along the rotation path of the rotating plate. Each light-aligning hole is correspondingly provided with a second positioning hole, and the apertures of the plurality of light-aligning holes are different from each other.
[0013] In one embodiment, the rotating plate is provided with a placement groove, and the light alignment hole is provided at the bottom of the placement groove.
[0014] In one embodiment, the rotating plate is provided with weight-reducing holes.
[0015] In one embodiment, the weight-reducing holes extend along the rotation path of the rotating plate.
[0016] In one embodiment, the bottom plate and the light source are detachably connected.
[0017] In one embodiment, the light source includes a housing and a light-emitting element disposed inside the housing. The housing is provided with a mounting opening opposite to the light-transmitting hole. The light-emitting center of the light-emitting element is aligned with the center of the light-transmitting hole, and the bottom plate and the housing are detachably connected.
[0018] In one embodiment, the opening area of the mounting opening is larger than the opening area of the light-transmitting hole;
[0019] And / or, the light-transmitting hole and the light alignment hole are configured as circular holes, and the mounting opening is configured as a square opening.
[0020] In one embodiment, the housing is provided with heat dissipation holes.
[0021] In the technical solution of the present application, through the provided rotating plate and positioning structure, during calibration, the camera is placed at the position of the light alignment hole on the rotating plate, and then the rotating plate is rotated so that the first positioning portion and the second positioning portion are cooperatively aligned. At this time, the light alignment hole can be aligned with the light-transmitting hole, so that the positions of the light source and the camera are kept consistent, improving the unity of the calibration standard for testing the camera. It can be understood that each time the camera is calibrated, a unified light source can be used, reducing the probability of problems such as inconsistent light source positions, inconsistent calibration references, and manual operation errors, and improving the consistency of the flat field calibration and white balance effects of various camera products during the development and debugging, production and manufacturing processes. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.
[0023] Figure 1 is a schematic structural diagram of an embodiment of the camera calibration device of the present invention;
[0024] Figure 2 isFigure 1 Schematic structural diagram of the rotating plate in
[0025] Figure 3 is Figure 1 Schematic structural diagram of the bottom plate in
[0026] Figure 4 is Figure 1 Schematic structural diagram of the light source in
[0027] Explanation of the reference numerals in the drawings:
[0028] 100. Light source; 110. Housing; 111. Heat dissipation holes; 120. Light-emitting element; 200. Bottom plate; 210. Light-transmitting holes; 300. Rotating plate; 310. Light-aligning holes; 320. Placing grooves; 330. Weight-reducing holes; 410. First positioning portion; 420. Second positioning portion.
[0029] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments
[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the embodiments of the present utility model.
[0031] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0032] In addition, the descriptions such as "first" and "second" in the embodiments of the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0033] In the embodiments of the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.
[0034] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the embodiments of the present utility model.
[0035] A camera is a common electronic product. Under ideal conditions, when the external irradiation is uniform, the gray value of each pixel point in the camera image should be equal. However, due to the differences in the structure and manufacturing process of the camera chip itself, the responses of each pixel on the camera chip are inconsistent. At the same time, there are also differences in dark current noise, etc., resulting in different actual gray values for each pixel. The above phenomenon is called the response non-uniformity of the detector. The purpose of flat-field correction is to correct the above non-uniformity and ensure the consistency of the camera image during debugging and production.
[0036] In addition, different types of light environments will produce different color tendencies on objects. The human eye visual system can self-adjust and adapt in different light environments to identify white objects. However, a camera will directly record colors, resulting in the possibility of color cast in the captured image, such as being bluish or reddish. Usually, the camera system has an automatic white balance function to correct the color cast phenomenon.
[0037] Currently, camera flat-field correction and white balance are mainly carried out by manually holding the camera and using a light source or white paper for correction. This method is affected by many factors such as the brightness of the light source, the material of the white paper, the camera angle, the working distance, and manual operation, and cannot ensure consistency during debugging and production, resulting in inconsistent color restoration degrees and obvious color differences between different camera products.
[0038] In view of this, the embodiments of the present utility model provide a camera correction device. By setting a rotating plate and a positioning structure, during correction, the camera is placed at the position of the light-aligning hole on the rotating plate, and then the rotating plate is rotated so that the first positioning portion and the second positioning portion are aligned with each other. At this time, the light-aligning hole can be aligned with the light-transmitting hole, so that the positions of the light source and the camera are kept consistent, improving the unity of the correction standard for testing the camera, and further improving the consistency of the correction effect.
[0039] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.
[0040] like Figures 1 to 3 As shown, the embodiment of the utility model provides a camera calibration device, the camera calibration device comprises:
[0041] The light source 100 can emit light to provide stable lighting;
[0042] The bottom plate 200 is disposed on one side of the light source 100, and the bottom plate 200 is provided with a light-transmitting hole 210. It can be understood that the light emitting direction of the light source 100 is toward the light-transmitting hole 210 on the bottom plate 200, and the light can be irradiated to the camera through the light-transmitting hole 210. Optionally, the bottom plate 200 is disposed above the light source 100;
[0043] The rotating plate 300 is rotatable on the bottom plate 200 along a rotation axis, and a light hole 310 is provided on the rotating plate 300, and the distances from the center of the light-transmitting hole 210 and the center of the light-transmitting hole 310 to the rotation axis are equal. It can be understood that the rotating plate 300 is disposed on the surface of the bottom plate 200 away from the light source 100, and rotates on the bottom plate 200 along the rotation axis. The light hole 310 is provided on the rotating plate 300, and the camera is placed on the rotating plate 300, and the lens of the camera is aligned with the light hole 310. The distances from the center of the light-transmitting hole 210 and the center of the light-transmitting hole 310 to the rotation axis are equal, and the light-transmitting hole 210 and the light hole 310 can be aligned by rotating the rotating plate 300, which is simple and convenient; and
[0044] The positioning structure includes a first positioning portion 410 provided on the bottom plate 200 and a second positioning portion 420 provided on the rotating plate 300. The rotating plate 300 is rotated so that the first positioning portion 410 and the second positioning portion 420 are aligned to align the light transmission hole 210 and the light aiming hole 310. It can be understood that, through the cooperation of the first positioning portion 410 and the second positioning portion 420, it can be ensured that the light transmission hole 210 and the light aiming hole 310 can be aligned when the rotating plate 300 is rotated to a predetermined position, thereby reducing the inconsistency caused by manual operation errors. In other words, as long as the rotating plate 300 is rotated to the position where the first positioning portion 410 and the second positioning portion 420 cooperate, at this time, the light transmission hole 210 and the light aiming hole 310 will inevitably be aligned, so that each calibration can ensure that the camera is located at the same position of the light source 100.
[0045] In the technical solution adopted in this embodiment, through the provided rotating plate 300 and positioning structure, during calibration, the camera is placed at the position of the light alignment hole 310 on the rotating plate 300, and then the rotating plate 300 is rotated so that the first positioning portion 410 and the second positioning portion 420 are cooperatively aligned. At this time, the light alignment hole 310 can be aligned with the light transmission hole 210, so that the positions of the light source 100 and the camera are kept consistent, improving the unity of the calibration standard for testing the camera. It can be understood that each time the camera is calibrated, a unified light source 100 can be used, reducing the probability of problems such as inconsistent positions of the light source 100, inconsistent calibration references, and manual operation errors, and improving the consistency of the flat field calibration and white balance effects of various camera products during the development and debugging, production and manufacturing processes.
[0046] In an embodiment of the present utility model, the first positioning portion 410 is configured as a first positioning hole, the second positioning portion 420 is configured as a second positioning hole, and the distances from the centers of the first positioning hole and the second positioning hole to the rotation axis are equal. In this embodiment, both the first positioning portion 410 and the second positioning portion 420 are through holes. It can be understood that the first positioning portion 410 is configured as a first positioning hole, and the second positioning portion 420 is configured as a second positioning hole. Since the distances from the centers of the first positioning hole and the second positioning hole to the rotation axis are equal, that is, the centers of the first positioning hole and the second positioning hole are located on the same virtual circumference, as long as the rotating plate 300 is rotated, the first positioning hole and the second positioning hole can be aligned, which is simple and convenient, reducing the complexity of the positioning structure.
[0047] In an embodiment of the present utility model, a plurality of light alignment holes 310 are provided at intervals along the rotation path of the rotating plate 300, and a second positioning hole is correspondingly provided for each light alignment hole 310, and the apertures of the plurality of light alignment holes 310 are different from each other. In this way, one rotating plate 300 can be compatible with placing a variety of cameras with different interfaces and sizes. When replacing and using different cameras, only need to place the camera at the position of the light alignment hole 310 corresponding to its size, and by rotating the rotating plate 300, the second positioning hole corresponding to the light alignment hole 310 where the camera is placed and the first positioning hole are aligned, then the switching can be completed. During the entire switching process, there is no need to replace different receiving plates, and only need to complete it through rotation operation, which is convenient to operate and can effectively improve work efficiency.
[0048] In an embodiment of the present utility model, referring to Figure 1 and Figure 2 , the rotating plate 300 is provided with a placement groove 320, and the light alignment hole 310 is provided at the bottom of the placement groove 320. Through the provided placement groove 320, the camera can be positioned or fixed, preventing the camera from moving and causing inconsistent calibration positions, thereby improving the consistency of the calibration effect. Optionally, the shape of the placement groove 320 is adapted to the shape of the camera.
[0049] In an embodiment of the present utility model, referring toFigure 1 and Figure 2 The rotating plate 300 is provided with weight-reducing holes 330. By providing the weight-reducing holes 330, the weight of the rotating plate 300 can be reduced, saving the effort of the operator when rotating the rotating plate 300.
[0050] In an embodiment of the present invention, the weight-reducing holes 330 extend along the rotation path of the rotating plate 300. In this way, the uniformity of the weight distribution of the rotating plate 300 on the rotation path can be improved.
[0051] In an embodiment of the present invention, the bottom plate 200 and the light source 100 are detachably connected. In this way, the maintenance or replacement of the light source 100 can be facilitated, and the bottom plate 200 or the light source 100 can also be replaced separately, saving costs. Optionally, the bottom plate 200 and the light source 100 can be detachably connected by a snap structure or bolts, which is not limited herein.
[0052] In an embodiment of the present invention, referring to Figure 4 , the light source 100 includes a housing 110 and a light-emitting element 120 provided inside the housing 110. The housing 110 is provided with an installation opening opposite to the light-transmitting hole 210. The light-emitting center of the light-emitting element 120 is aligned with the center of the light-transmitting hole 210, and the bottom plate 200 and the housing 110 are detachably connected. Specifically, the light-emitting element 120 can emit light, and the housing 110 can cover the outside of the light-emitting element 120, reducing the influence of the external environment on the light, further improving the consistency of the light, and thus improving the consistency of the calibration effect.
[0053] In an embodiment of the present invention, the opening area of the installation opening is larger than the opening area of the light-transmitting hole 210. In this way, the assembly of the light-emitting element 120 is facilitated, and the blocking of light can also be reduced;
[0054] And / or, the light-transmitting hole 210 and the light-aligning hole 310 are configured as circular holes, and the installation opening is configured as a square opening. Specifically, the circular hole helps the light to be more evenly distributed. Compared with other shapes, the circular hole has a smaller diffraction effect, and the scattering and reflection of light by the edge of the circular hole are less, which helps to maintain the purity of the light. The square opening can increase the opening area under the same aperture, which is more conducive to the assembly of the light-emitting element 120.
[0055] In an embodiment of the present invention, referring to Figure 4 , the housing 110 is provided with heat dissipation holes 111. In this way, the heat generated by the light-emitting element 120 during operation can be dissipated as soon as possible, reducing the internal temperature of the housing 110 and ensuring the normal operation of the light-emitting element 120.
[0056] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the embodiments of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the embodiments of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the embodiments of the present utility model.
Claims
1. A camera calibration device, characterized in that: The camera calibration device comprises: light source; A bottom plate, arranged on one side of the light source, the bottom plate being provided with a light-transmitting hole; A rotating plate is rotatably disposed on the bottom plate along a rotation axis, a light-aiming hole is disposed on the rotating plate, and the distances from the center of the light-transmitting hole and the center of the light-aiming hole to the rotation axis are equal; and The positioning structure comprises a first positioning part arranged on the bottom plate and a second positioning part arranged on the rotating plate. The rotating plate is rotated so that the first positioning part and the second positioning part are aligned to align the light transmission hole and the light alignment hole.
2. The camera calibration device according to claim 1, characterized in that: The first positioning portion is configured as a first positioning hole, the second positioning portion is configured as a second positioning hole, and the distances from the center of the first positioning hole and the center of the second positioning hole to the rotation axis are equal.
3. The camera calibration device according to claim 2, characterized in that: A plurality of the alignment holes are arranged at intervals along the rotation path of the rotating plate, each alignment hole is correspondingly provided with a second positioning hole, and the apertures of the plurality of alignment holes are different from each other.
4. The camera calibration device according to any one of claims 1 to 3, characterized in that: The rotating plate is provided with a placement groove, and the light-aiming hole is arranged at the groove bottom of the placement groove.
5. The camera calibration device according to claim 1, characterized in that: The rotating plate is provided with weight-reducing holes.
6. The camera calibration device according to claim 5, characterized in that: The weight-reducing holes extend along a rotation path of the rotating plate.
7. The camera calibration device according to claim 1, characterized in that: The bottom plate and the light source are detachably connected.
8. The camera calibration device according to claim 7, characterized in that: The light source comprises a shell and a light-emitting element arranged inside the shell. The shell is provided with a mounting opening opposite to the light-transmitting hole. The light-emitting center of the light-emitting element is aligned with the center of the light-transmitting hole. The bottom plate and the shell are detachably connected.
9. The camera calibration device according to claim 8, characterized in that: The opening area of the mounting opening is larger than the opening area of the light-transmitting hole; And / or, the light-transmitting hole and the light-aiming hole are configured as round holes, and the mounting opening is configured as a square opening.
10. The camera calibration device according to claim 8, characterized in that: The shell is provided with heat dissipation holes.