An image testing apparatus simulating sun and moon light conditions

Abstract

The utility model discloses an image test equipment of simulating sun and moon light condition, including the inside integral sphere with analog light source, be used for fixing and moving the mobile base of integral sphere, be located integral sphere one side's light outlet, the outside of light outlet is equipped with the box type light source simulator for providing analog ambient light, be equipped with the moon phase simulation adjusting mechanism between the box type light source simulator with light outlet, the light transmission shape of light outlet forms the moon phase conversion of different shape after adjusting through moon phase simulation adjusting mechanism. Can accurate simulation sun, moon light condition and the different form of moon phase to provide more reliable comprehensive test environment for camera detection, and more effective iteration promotes the image quality of camera under more complex weak light light environment.

Description

Technical Field

[0001] This utility model relates to the technical field of camera image testing devices, and is applied to the evaluation of camera images in the mobile phone, security, and automotive industries. Specifically, it relates to an image testing device that simulates sunlight and moonlight conditions. Background Technology

[0002] With the development of camera applications, the requirements for image performance under various complex lighting environments, including strong light and weak light, are increasing. In image testing and R&D, the accuracy of night scene mode reproduction of moonlight environments directly affects user experience. Imaging stability must be maintained throughout the entire lunar cycle from new moon to full moon; regardless of sunlight or moonlight conditions, cameras need to accurately capture the color and details of objects. Existing lighting testing devices have many shortcomings, making it difficult to accurately simulate real sunlight and moonlight conditions, especially limiting the quantitative analysis of color characteristics of complex textures and irregularly shaped objects. For example, to ensure image quality under complex lighting environments (such as the high dynamic range of sunlight and the low illumination of moonlight), existing testing schemes are mostly based on a single light source (such as halogen lamps or fixed color temperature LEDs). To address this issue, corresponding solutions exist, the most common being the use of a single fixed color temperature LED light source or a common integrating sphere light source for testing. However, the color temperature range of these light sources is narrow, and the adjustment precision is low, making it impossible to flexibly simulate changes in sunlight and moonlight under different times and weather conditions. Furthermore, existing devices also have the following limitations:

[0003] The lack of lunar phase simulation: The shape of the moon (full moon, half moon, crescent moon) directly affects the camera's ability to resist glare from low-light point light sources. However, the traditional integrating sphere only provides a fixed circular light-emitting surface, which cannot flexibly simulate changes in the shape of the moon phase and cannot simulate the differences in point light source scattering caused by crescent moon light. It cannot meet the needs of testing the impact of moon light shape on camera image performance, resulting in incomplete testing of camera glare suppression algorithms.

[0004] Weak spectral simulation capabilities: Few spectral channels; low spectral resolution; difficulty in inputting custom spectral data (such as a scene where moonlight and sunlight are mixed); inability to accurately match the mixed spectrum of moonlight (including the ultraviolet band) and sunlight.

[0005] Insufficient uniformity: Uneven illumination distribution on the surface of irregularly shaped objects can lead to color analysis errors (such as color cast at the lens edge), making it impossible to guarantee stable and uniform illumination in a large test area;

[0006] Controlled closure: It is impossible to achieve flexible closed-loop calibration and other functions in collaboration with third-party instruments, so existing image testing equipment needs to be improved. Summary of the Invention

[0007] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide an image testing device that simulates the conditions of sunlight and moonlight, which can accurately simulate the different forms of sunlight, moonlight and lunar phases, thereby providing a more reliable and comprehensive testing environment for camera inspection and more effectively iteratively improving the image quality of cameras in more complex low-light environments.

[0008] To address the aforementioned technical problems, the objective of this application is achieved through the following technical solution:

[0009] An image testing device simulating lunar and solar light conditions includes an integrating sphere with an internal simulated light source, a movable base for fixing and moving the integrating sphere, and a light outlet located on one side of the integrating sphere. A box-type light source simulator for providing simulated ambient light is provided outside the light outlet. A lunar phase simulation adjustment mechanism is provided between the box-type light source simulator and the light outlet. The light transmission shape of the light outlet is adjusted by the lunar phase simulation adjustment mechanism to form different lunar phase changes.

[0010] The box-shaped light source simulator added at the light outlet of the integrating sphere can simulate the lighting environment of uniform sunlight and uniform moonlight. It provides various strong light, weak light and complex light to meet the image performance requirements of the test object after shooting, so as to meet the camera's accurate capture of the color and details of the object under sunlight and moonlight conditions. The simulated light source inside the integrating sphere serves as the main light source of moonlight / sunlight, which can simulate the light of the sun and moon. In addition, with the simulation of the light source inside the integrating sphere and the change of the shape of the light outlet by the moon phase simulation adjustment mechanism, it can also simulate shooting the sun and the moon under different moon phases, thus avoiding the problem of missing moon phase simulation.

[0011] Preferably, the lunar phase simulation adjustment mechanism includes a storage box connected to the box-type light source simulator and the light outlet on both sides, a light-transmitting hole through the storage box, an adjustable opening and closing plate and a limiting device inside the storage box, wherein the opening and closing plate moves along the limiting device to simulate different lunar phase shapes with the light-transmitting hole.

[0012] The limiting device can limit and guide the movement of the opening and closing plate, so that the opening and closing plate can combine with the circular light-transmitting hole during the movement to form light-transmitting holes of different lunar phases. Finally, after combining with different light sources in the integrating sphere to simulate light, the sun and moon for shooting are formed.

[0013] Preferably, the limiting device includes two parallel slide rails and an elongated limiting hole on one side of the storage box. The two sides of the opening and closing plate are slidably disposed in the slide rails, and one side of the opening and closing plate extends outward through the limiting hole.

[0014] Preferably, the left and right sides of the opening and closing plate are respectively provided with arc-shaped grooves and arc-shaped protrusions, and the upper side of the opening and closing plate is also provided with a bent driving block. One end of the driving block extends out of the storage box through the limiting hole. The opening and closing plate forms different moon phase shapes after cooperating with the light-transmitting hole through the arc-shaped grooves and arc-shaped protrusions respectively.

[0015] Existing technologies lack designs for simulating moonlight shapes, while this application achieves moonlight simulation of various shapes such as full moon, half moon, and crescent moon through a combination of light-transmitting holes and opening and closing plates, enriching the test scenarios of cameras under moonlight conditions and helping to more comprehensively evaluate their image performance under different moonlight environments.

[0016] Preferably, the inner wall of the light outlet of the integrating port is provided with a matte coating.

[0017] The inner wall of the light output channel of the integrating port is coated with an 18% gray non-reflective matte coating to avoid stray light interference and ensure the clarity of the light spot edge.

[0018] Preferably, the box-type light source simulator includes a box with openings on the front and rear sides, a light source controller located on the top of the box, and the rear side of the box is closed by the storage box.

[0019] By controlling the top light source, uniform illumination can be provided, simulating ambient light interference, thereby satisfying the ambient light pattern and ensuring stable and uniform illumination in a large test area. This makes the illuminance distribution on the surface of irregularly shaped objects more uniform and reduces color analysis errors in the acquired images (such as color cast at the lens edge).

[0020] Preferably, the analog light source in the light source controller is linked to the analog light source in the integrating sphere.

[0021] Preferably, both the light source controller and the simulated light source within the integrating sphere are LED multispectral light sources, supporting color temperature and spectral simulation, or simulation based on input target spectral data.

[0022] Preferably, the color temperature range accuracy (CCT) of the LED multispectral light source is 2000~20000K, and the accuracy is ≤100K.

[0023] Preferably, the illuminance of the LED multispectral light source is in the range of 30-50000 lux.

[0024] Preferably, the spectral range of the LED multispectral light source is 340nm~780nm.

[0025] By replacing the LED multispectral light source, the problem of weak spectral simulation capability can be solved. It has more spectral channels, higher spectral resolution, and can input custom spectral data according to different needs (such as a scene of moonlight spectrum and sunlight mixed), so as to accurately match the mixed spectrum of moonlight (including ultraviolet band) and sunlight.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] 1. The test subjective image cards include subjective scene cards such as blue sky and white clouds, with low diffuse reflection and reflectivity. It also provides subjective scenes with detailed textures and color gradients. It is mainly used for camera image evaluation in industries such as mobile phones, security, and automobiles. It constructs a full-scene sun and moon light simulation environment through dual light sources. With the moon phase simulation adjustment mechanism, it can accurately simulate the sun and moon light conditions and different moon phases, thus providing a more reliable and comprehensive test environment for camera testing. In night scene mode testing, it can simulate the full spectrum and illumination range test from full moon to new moon, and more effectively iterate and improve the image quality of cameras in more complex low-light environments.

[0028] 2. The box-type light source simulator can ensure the uniformity of illumination on the surface of the tested irregularly shaped object, and supports inputting any target spectral curve to match the target spectrum in real time (input or preset), ensuring color temperature stability and illuminance linearity.

[0029] 3. By combining multispectral light sources and integrating spheres, it can highly reproduce the real conditions of sunlight and moonlight, providing a test environment that is closer to actual use scenarios. This allows for a more accurate evaluation of its image performance under sunlight and moonlight conditions, enabling dynamic switching between sunlight and moonlight illumination and simulation of lunar phases, covering full illumination testing of the camera from sunlight to moonlight.

[0030] 4. The multispectral integrating sphere light source has excellent color temperature stability and brightness stability, ensuring that the light source parameters remain stable during long-term testing and reducing the impact of light source fluctuations on camera image performance testing.

[0031] 5. It can solve the problem of quantitative analysis of color features of complex textured objects and irregularly shaped objects, expand the application scope of camera image performance testing, make it more suitable for various shooting scenarios and object types in actual use, and meet the testing needs of complex objects. Attached Figure Description

[0032] Figure 1 This is a side view of the overall structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the combined structure of the lunar phase simulation adjustment mechanism in this utility model;

[0034] Figure 3This is an exploded view of the lunar phase simulation adjustment mechanism in this utility model;

[0035] Figure 4 This is a schematic diagram of the opening and closing plate connected to the slide rail via a slider in this utility model;

[0036] Figure 5 This is a schematic diagram of the connection structure between the lunar phase simulation adjustment mechanism and the box-type light source simulator in this utility model;

[0037] Figure 6 This is a three-dimensional view of the overall structure of this utility model.

[0038] In the diagram: 1. Box-type light source simulator; 11. Box body; 12. Light source controller; 2. Lunar phase simulation adjustment mechanism; 21. Opening and closing plate; 211. C-shaped groove; 22. Limiting device; 221. Slide rail; 222. Limiting hole; 23. Storage box; 24. Light transmission hole; 3. Light outlet; 4. Integrating sphere; 5. Moving base; 6. Arc-shaped groove; 7. Adjuster; 8. Drive block; 9. Arc-shaped protrusion; 10. Slider. Detailed Implementation

[0039] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0040] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] like Figure 1As shown, an image testing device simulating lunar and solar light conditions includes an integrating sphere 4 with an internal simulated light source, a movable base 5 for fixing and moving the integrating sphere 4, and a light outlet 3 located on one side of the integrating sphere 4. A box-type light source simulator 1 for providing simulated ambient light is provided on the outside of the light outlet 3. A lunar phase simulation adjustment mechanism 2 is provided between the box-type light source simulator 1 and the light outlet 3. The light transmission shape of the light outlet 3 is adjusted by the lunar phase simulation adjustment mechanism 2 to form different lunar phase changes.

[0043] Compared to existing technologies, a box-type light source simulator 1 connected to a lunar phase simulation adjustment mechanism 2 is added to the light outlet 3 of the existing integrating sphere 4. This box-type light source simulator 1 can simulate uniform sunlight and uniform moonlight lighting environments, providing various strong, weak, and complex lighting conditions to meet the image performance requirements of the test object during shooting. This satisfies the camera's ability to accurately capture the color and detail of the object under sunlight and moonlight conditions. The simulated light source inside the integrating sphere 4 serves as the main light source for moonlight / sunlight, simulating both solar and lunar light. Combined with the lunar phase simulation adjustment mechanism 2, which adjusts the shape of the light outlet 3, it can create circular, elliptical, and crescent-shaped variations. This provides simulated shooting conditions for the sun and the moon under different lunar phases, thus solving the problem of missing lunar phase simulation during camera testing.

[0044] Further improvements include, for example Figure 2 The lunar phase simulation adjustment mechanism 2 includes a storage box 23 connected to the box-type light source simulator 1 and the light outlet 3 on both sides, a light-transmitting hole 24 through the storage box 23, an adjustable opening and closing plate 21 and a limiting device 22 disposed inside the storage box 23. After the opening and closing plate 21 moves along the limiting device 22, it simulates different lunar phase shapes with the light-transmitting hole 24.

[0045] The lunar phase simulation adjustment mechanism 2 is fixed between the box-type light source simulator 1 and the light outlet 3 via the front and rear sides of the storage box 23, respectively. One side of the storage box 23 is fixed to the rear side of the box-type light source simulator 1 with screws, which can ensure the positional stability of the light-transmitting hole 24. The light-transmitting hole 24 is annular and is generally smaller than or equal to the light outlet 3. Since the integrating sphere 4 can be moved by the movable base 5, the light outlet 3 of the integrating sphere 4 and one side of the storage box 23 can be fixedly connected or separately connected. When needed, it can be moved and fitted to the outside of the light-transmitting hole 24. It can be adjusted according to different situations. In order to avoid light transmission problems at the connection, a sealing ring can also be used for buffering. An adjustable opening and closing plate 21 and a limiting device 22 are installed inside the container. When it is necessary to switch the light output shape of the circular light-transmitting hole 24, simply move the opening and closing plate 21 along the limiting device 22. The opening and closing plate 21 can block part of the light-transmitting hole 24 to simulate different lunar phases. Finally, after simulating light with different light sources in the integrating sphere 4, a simulated sun and moon for shooting is formed.

[0046] Further improvements include, for example Figure 3 and Figure 4 As shown, the limiting device 22 includes two parallel slide rails 221 and an elongated limiting hole 222 on one side of the storage box 23. The two sides of the opening and closing plate 21 are slidably disposed in the slide rails 221, and one side of the opening and closing plate 21 extends outward through the limiting hole 222.

[0047] The limiting device 22 consists of two horizontally mounted slide rails 221 on the upper and lower sides of the light-transmitting hole 24 and an elongated limiting hole 222 located on the rear side of the storage box 23 and parallel to the slide rails 221. The two sides of the opening and closing plate 21 are slidably connected to the slide rails 221, and one side of the opening and closing plate 21 extends outward through the limiting hole 222. When it is necessary to move the opening and closing plate 21, the operator can directly grasp the protruding part of the outwardly extending opening and closing plate 21 and slide it, so that the opening and closing plate 21 moves to the required position to form light-transmitting holes 24 of different shapes. During operation, it is manually operated. During testing, it can be adjusted to the required position at any time, making the operation simpler and more convenient.

[0048] Further improvements include, for example Figures 3-5 As shown, the left and right sides of the opening and closing plate 21 are respectively provided with arc-shaped grooves 6 and arc-shaped protrusions 9. The upper side of the opening and closing plate 21 is also provided with a bent driving block 8. One end of the driving block 8 extends out of the storage box 23 through the limiting hole 222. The opening and closing plate 21 forms different lunar phase shapes after cooperating with the light-transmitting hole 24 through the arc-shaped grooves 6 and arc-shaped protrusions 9 respectively.

[0049] Arc-shaped grooves 6 and arc-shaped protrusions 9 are respectively provided on the left and right sides of the opening and closing plate 21. During operation, the drive block 8 can slide left and right along the limiting hole 222, so that the arc-shaped grooves 6 and arc-shaped protrusions 9 can cooperate with the light-transmitting hole 24 to form different moon phases (full moon / half moon / crescent moon). That is, when the arc-shaped groove 6 enters the light-transmitting hole 24 and blocks it, the light-transmitting hole 24 can be simulated as the shape of the first quarter moon. When the arc-shaped protrusion 9 enters the light-transmitting hole 24, the light-transmitting hole 24 can be simulated as the shape of the last quarter moon. This provides simulated shooting conditions of the moon under different moon phases during shooting, solving the problem of the lack of moon phase simulation during camera testing. The upper side of the opening and closing plate 21 extends outward through the bent drive block 8, forming a handle structure, which is more convenient to operate and has a simple structure.

[0050] In particular, when the opening and closing plate 21 is dynamically combined with spectral data (e.g., the crescent shape corresponds to the ultraviolet decay of the moonlight spectrum), the actual light spot shape of moonlight projected onto the camera can be simulated by changing the diffusion angle of the point light source. The position of the opening and closing plate 21 satisfies the moonlight spectral data (CIE standard), ensuring spectral characteristics when the shape changes, thus solving the technical defect that the fixed circular light-emitting surface of the traditional integrating sphere 4 cannot simulate the phases of the moon.

[0051] The opening and closing plate 21 is a sheet-like metal plate, and the driving block 8 is integrally formed with the opening and closing plate 21. The opening and closing plate 21 is bent to form a C-shaped groove 211 recessed to one side. The arc-shaped groove 6 and arc-shaped protrusion 9 are located on the left and right sides of the C-shaped groove 211, respectively. A slider 10 is provided at the outer corner of the C-shaped groove 211 to cooperate with the slide rail 221. The slider 10 is slidably connected to the slide rail 221. Through the design of the C-shaped groove 211, one side of the opening and closing plate 21 can fit into the storage box 23 installed on one side of the box-type light source simulator 1. This makes the light-transmitting hole 24 on the side near the box-type light source simulator 1 more accurate when simulating the lunar phase. It avoids the problem that the light from the light source inside the box-type light source simulator 1 can shine on the outer side of the opening and closing plate 21 due to the gap between the storage box 23 and the opening and closing plate 21, which would affect the image quality. This makes the accuracy of the lunar phase simulation higher. The two sides of the opening and closing plate 21 slide through the slider 10, which makes the sliding more flexible.

[0052] A further improvement is that an adjuster 7 is provided on the opening and closing plate 21, and the sliding resistance between the slider 10 and the slide rail 221 is adjusted by the adjuster 7.

[0053] Since the opening and closing plate 21 is installed through the cooperation of the slide rail 221 and the slider 10, and the friction between the two parts is generally not adjustable, the existing slide rail 221 and slider 10 are easily subject to external forces after installation and will automatically slide, which will cause the moon phase to be unable to be fixed during the test. Therefore, in order to solve this problem, an adjuster 7 is installed on the opening and closing plate 21. The adjuster 7 can adjust the sliding friction between the slide rail 221 and the slider 10, so that it can reach the required friction coefficient without jamming. During the adjustment of the opening and closing plate 21, the effect of manual stop and positioning can be achieved, and the sliding will not be caused by slight external vibrations.

[0054] A further improvement is made by providing an anti-glare coating on the inner wall of the light outlet 3 of the integration port.

[0055] The inner wall of the three light output channels of the integrating port is coated with an 18% gray non-reflective matte coating to avoid stray light interference and ensure the clarity of the light spot edge.

[0056] A further improvement is made to the case-type light source simulator 1, which includes a case 11 with openings on the front and rear sides, a light source controller 12 located on the top of the case 11, and the rear side of the case 11 is closed by the storage box 23.

[0057] The rear of the box 11 is sealed by the storage box 23. When an object is placed in the box 11, the light source controller 12 on the top can provide uniform illumination from sunlight and moonlight to simulate ambient light interference, meet the illumination pattern of ambient light, and ensure stable uniform illumination in a large test area. This makes the illuminance distribution on the surface of the irregularly shaped object more uniform and reduces the color analysis error (such as color cast at the edge of the lens) of the acquired image.

[0058] A further improvement is made in that the simulated light source in the light source controller 12 is linked with the simulated light source in the integrating sphere 4 for control; both the light source controller 12 and the simulated light source in the integrating sphere 4 use LED multispectral light sources, which support color temperature and spectral simulation, or simulation by inputting target spectral data; the color temperature range accuracy (CCT) of the LED multispectral light source is 2000~20000K, and the accuracy is ≤100K; the illuminance range of the LED multispectral light source is 30-50000 lux; and the spectral range of the LED multispectral light source is 340nm~780nm.

[0059] The simulated light source in the light source controller 12 and the simulated light source in the integrating sphere 4 are linked for control. Through a dual-light source illuminance collaborative control algorithm, and based on the illuminance distribution weight calculated according to the 3D model of the surface of the object under test (obtained through structured light scanning), the output ratio of the integrating sphere 4 and the box light source can be adjusted in real time to ensure the uniformity of illuminance on the surface of irregularly shaped objects. When combined with the design of the relatively mature scene-based programming API interface, it can support secondary development by users (such as importing custom spectral curves and triggering tests by linking with cameras). The cloud storage provides 80 presets for local hardware storage, and the software can infinitely expand scene schemes (such as sunrise, moonrise, and aurora) through the database. By synchronously adjusting the color temperature, illuminance, and spectral weight of the two light sources through the software system, the simulation of day and night alternation scenes can be realized. During night scene mode testing, the full spectrum and illuminance range test from full moon to new moon can be simulated.

[0060] The simulated light sources in both the light source controller 12 and the integrating sphere 4 utilize LED multispectral light sources. The spectral matching algorithms are based on a weight matrix of 26 LED channels. By replacing the LED multispectral light sources, the system can highly replicate the real conditions of sunlight and moonlight, providing a test environment closer to actual usage scenarios. This allows for more accurate evaluation of image performance under sunlight and moonlight conditions, enabling dynamic switching between sunlight and moonlight illumination and simulation of lunar phases. It covers the full illuminance test of the camera from sunlight to moonlight, thus solving the problem of weak spectral simulation capabilities and ensuring the uniformity of illumination on the surface of the tested irregularly shaped object. The system features a large number of spectral channels, high spectral resolution, and supports input of any target spectral curve. Real-time matching of the target spectrum (input or preset) allows for input of custom spectral data according to different needs (such as a mixed scene of moonlight and sunlight), accurately matching the mixed spectrum of moonlight (including the ultraviolet band) and sunlight. The LED multispectral light source employs closed-loop calibration, with feedback data from a color spectroradiometer, dynamically correcting the light source output to ensure color temperature stability and illuminance linearity.

[0061] like Figure 6As shown, when evaluating camera images using an image testing device that simulates sunlight and moonlight conditions, it also includes a test subjective image card. This card includes subjective scene cards such as blue sky and white clouds, and scene cards with diffuse reflection and low reflectivity. It also provides subjective scenes with detailed textures and color gradients, primarily used for camera image evaluation in industries such as mobile phones, security, and automobiles. During testing, the camera is positioned directly in front of the box-type light source simulator 1. The object under test is then placed inside the box 11 of the simulator. The light source controller 12 simulates different light sources to illuminate the object, thus simulating uniform sunlight and uniform moonlight lighting environments. The camera can capture image data of the object under different light sources. Furthermore, by adjusting the shape of the light outlet 3 through the moon phase simulation adjustment mechanism 2, the light outlet 3 can be changed to a circle, a half-moon, or a crescent moon, simulating the shape and light of the sun and moon. This allows for the simulation of shooting the sun and the moon under different moon phases, thus avoiding the problem of missing moon phase simulation. During the shooting process, the external dual-light source collaborative system and high-precision control algorithm can be used to construct a full-scene simulated environment of sunlight and moonlight. This can accurately simulate different sunlight and moonlight conditions, providing a reliable testing environment for camera research and development and quality inspection, and effectively improving the image quality of the camera in complex low-light environments.

[0062] In particular, after the simulated light source inside the integrating sphere 4 was replaced with an LED multispectral light source, the color temperature and brightness stability of the multispectral integrating sphere 4 light source are excellent. This ensures that the light source parameters remain stable during long-term testing, reducing the impact of light source fluctuations on camera image performance testing and meeting the testing requirements of complex objects. Simulating the light source using an LED multispectral light source can also solve the problem of quantitative analysis of color characteristics for complex textured objects and irregularly shaped objects, expanding the application scope of camera image performance testing and making it more suitable for various shooting scenarios and object types in actual use.

[0063] Regarding the light source, in addition to LED box-type light sources and multispectral integrating sphere 4 light sources, other new light source technologies can also be considered, such as more efficient laser-induced fluorescence light sources. However, further research is needed on their performance under simulated sunlight and moonlight conditions and their compatibility with camera image performance testing. However, compared with other light sources, LED light sources have more prominent comprehensive advantages in terms of cost and stability, so the existing light source solutions are preferred.

[0064] Regarding the control system: other brands or types of light source control systems can be used, but they may not be as good as the light source control system of this solution in terms of functional integration, control accuracy, and compatibility with the various light source devices in this invention.

[0065] Regarding the lunar phase substitution: A rotatable light shield can be placed in front of the light-emitting aperture, and different moonlight shapes can be simulated by changing the angle and position of the light shield. However, this structure may increase the complexity and cost of the device, and it is not as flexible as the existing hinged plate 21 design in achieving moonlight shape transformation. While using rotating filters to switch lunar phases by stacking filters of different apertures and rotating them, continuous shape adjustment cannot be achieved. The proposed hinged plate 21 design perfectly solves this problem, allowing for continuous adjustment from full moon to crescent moon simply through translation.

[0066] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. An image testing device simulating sunlight and moonlight conditions, comprising an integrating sphere (4) with an internal simulated light source, a movable base (5) for fixing and moving the integrating sphere (4), and a light outlet (3) located on one side of the integrating sphere (4), characterized in that: The outer side of the light outlet (3) is provided with a box-type light source simulator (1) for providing simulated ambient light. A lunar phase simulation adjustment mechanism (2) is provided between the box-type light source simulator (1) and the light outlet (3). The light transmission shape of the light outlet (3) is adjusted by the lunar phase simulation adjustment mechanism (2) to form different lunar phase changes.

2. The image testing device for simulating solar and lunar light conditions according to claim 1, characterized in that: The lunar phase simulation adjustment mechanism (2) includes a storage box (23) connected to the box-type light source simulator (1) and the light outlet (3) on both sides respectively, a light-transmitting hole (24) through the storage box (23), an adjustable opening and closing plate (21) and a limiting device (22) provided in the storage box (23). After the opening and closing plate (21) moves along the limiting device (22), it simulates different lunar phase shapes with the light-transmitting hole (24).

3. The image testing device for simulating solar and lunar light conditions according to claim 2, characterized in that: The limiting device (22) includes two parallel slide rails (221) and an elongated limiting hole (222) on one side of the storage box (23). The two sides of the opening and closing plate (21) are slidably disposed in the slide rails (221), and one side of the opening and closing plate (21) extends outward through the limiting hole (222).

4. The image testing device for simulating solar and lunar light conditions according to claim 3, characterized in that: The opening and closing plate (21) is provided with an arc-shaped groove (6) and an arc-shaped protrusion (9) on the left and right sides respectively. The opening and closing plate (21) is also provided with a bent driving block (8) on the upper side. One end of the driving block (8) extends out of the storage box (23) through the limiting hole (222). The opening and closing plate (21) forms different lunar phase shapes after the arc-shaped groove (6) and the arc-shaped protrusion (9) are respectively engaged with the light-transmitting hole (24).

5. The image testing device for simulating solar and lunar light conditions according to claim 2, characterized in that: The box-type light source simulator (1) includes a box (11) with openings on the front and back sides, and a light source controller (12) located on the top of the box (11). The rear side of the box (11) is closed by the storage box (23).

6. The image testing device for simulating solar and lunar light conditions according to claim 5, characterized in that: The analog light source in the light source controller (12) is linked with the analog light source in the integrating sphere (4) for control.

7. An image testing device simulating solar and lunar light conditions according to claim 6, characterized in that: The simulated light sources in the light source controller (12) and the integrating sphere (4) both adopt LED multispectral light sources, which support color temperature and spectrum simulation, or input target spectrum data for simulation.

8. The image testing device for simulating solar and lunar light conditions according to claim 7, characterized in that: The color temperature range accuracy (CCT) of the LED multispectral light source is 2000~20000K, and the accuracy is ≤100K.

9. The image testing device for simulating solar and lunar light conditions according to claim 8, characterized in that: The illuminance range of the LED multispectral light source is 30-50000 lux.

10. An image testing device simulating solar and lunar light conditions according to claim 9, characterized in that: The spectral range of the LED multispectral light source is 340nm~780nm.

Images