Brightness control method, device and equipment of automobile projection headlamp and storage medium

Abstract

The invention provides a brightness control method and device for an automobile projection headlamp, equipment and a storage medium. According to the specific implementation scheme, the method comprises the steps that the target brightness of a light-emitting target projected by the automobile projection headlamp and the environment brightness of the surrounding environment of the light-emitting target are obtained; calculating the brightness contrast of the target brightness and the ambient brightness; comparing the brightness contrast with a preset contrast reference range; and if the brightness contrast exceeds the contrast reference range, generating a corresponding brightness adjusting signal according to a deviation index of the brightness contrast relative to the contrast reference range so as to control the automobile projection headlamp to correspondingly adjust the brightness of the light-emitting target. Through the implementation of the scheme of the invention, the brightness contrast analysis is performed in combination with the projection target brightness of the automobile projection headlamp and the ambient brightness, and the headlamp brightness adjustment is adaptively performed, so that the identification degree of the projection target of the automobile projection headlamp is ensured, the glare influence is reduced, and the visual comfort and identifiability are realized.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to the field of automobile lighting control technology. Specifically, the present application discloses a brightness control method, device, equipment and storage medium for automobile projection headlights. Background Art

[0002] In recent years, the degree of automobile intelligence has been continuously improved, and various intelligent technologies have been applied to automobiles. Automobile projection headlights are a typical application. At present, in addition to providing traditional nighttime lighting, automobile headlights can also project light to form personalized luminous targets such as light blankets and logos to provide special indication effects, etc. However, the automobile projection headlights provided in the relevant technologies do not compromise between visual comfort and luminous target recognizability. Usually, they only unilaterally consider the recognizability of luminous targets, and blindly increase the luminous brightness of the headlights, which will produce a greater glare effect and reduce the visual comfort of the human eye.

[0003] It is worth noting that the techniques described in this section are not necessarily techniques that have been previously conceived or employed. Unless otherwise indicated, it should not be assumed that any technique described in this section is considered to be prior art simply because it is included in this section. Similarly, unless otherwise indicated, the issues mentioned in this section should not be considered to have been recognized in any prior art. Summary of the invention

[0004] The embodiments of the present application provide a brightness control method, device, equipment and storage medium for a vehicle projection headlight, aiming to solve at least one of the problems in the related art to a certain extent.

[0005] A first aspect of an embodiment of the present application provides a brightness control method for a vehicle projection headlight, comprising:

[0006] Obtaining the target brightness of the luminous target projected by the automobile projection headlight, and obtaining the ambient brightness of the environment surrounding the luminous target;

[0007] Calculating the brightness contrast between the target brightness and the ambient brightness;

[0008] The brightness contrast is compared with a preset contrast reference range; wherein the glare index of the luminous target corresponding to the contrast reference range is lower than a preset index threshold and the luminous target recognition degree is higher than a preset recognition degree threshold;

[0009] If the brightness contrast exceeds the contrast reference range, a corresponding brightness adjustment signal is generated according to a deviation index of the brightness contrast relative to the contrast reference range to control the automobile projection headlight to adjust the luminous target brightness accordingly.

[0010] A second aspect of the embodiment of the present application provides a brightness control device for a vehicle projection headlight, comprising:

[0011] An acquisition module, used to acquire the target brightness of the luminous target projected by the automobile projection headlight, and to acquire the ambient brightness of the surrounding environment of the luminous target;

[0012] A calculation module, used for calculating the brightness contrast between the target brightness and the ambient brightness;

[0013] A comparison module, used to compare the brightness contrast with a preset contrast reference range; wherein the glare index of the luminous target corresponding to the contrast reference range is lower than a preset index threshold and the luminous target recognition degree is higher than a preset recognition degree threshold;

[0014] The control module is used to generate a corresponding brightness adjustment signal according to a deviation index of the brightness contrast relative to the contrast reference range if the brightness contrast exceeds the contrast reference range, so as to control the automobile projection headlight to adjust the luminous target brightness accordingly.

[0015] A third aspect of an embodiment of the present application provides an electronic device, comprising: a memory and a processor, wherein the processor is used to execute a computer program stored in the memory, and when the processor executes the computer program, it implements each step of the brightness control method of the automotive projection headlight provided in the first aspect of the embodiment of the present application.

[0016] A fourth aspect of an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, each step of the brightness control method of a vehicle projection headlight provided in the first aspect of the embodiment of the present application is implemented.

[0017] As can be seen from the above, according to the brightness control method, device, equipment and storage medium of the automobile projection headlight provided by the present application scheme, the target brightness of the luminous target projected by the automobile projection headlight is obtained, and the ambient brightness of the surrounding environment of the luminous target is obtained; the brightness contrast between the target brightness and the ambient brightness is calculated; the brightness contrast is compared with the preset contrast reference range; wherein the glare index of the luminous target corresponding to the contrast reference range is lower than the preset index threshold and the luminous target recognition is higher than the preset recognition threshold; if the brightness contrast exceeds the contrast reference range, a corresponding brightness adjustment signal is generated according to the deviation index of the brightness contrast relative to the contrast reference range to control the automobile projection headlight to adjust the brightness of the luminous target accordingly. Through the implementation of the present application scheme, the brightness contrast analysis is performed in combination with the projection target brightness and the ambient brightness of the automobile projection headlight, and the headlight brightness is adaptively adjusted, which reduces the glare effect while ensuring the recognition of the projection target of the automobile projection headlight, that is, it has both visual comfort and recognizability.

[0018] It should be understood that the content described in this section is not intended to identify the key or important features of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings exemplarily illustrate the embodiments and constitute a part of the specification, and together with the text description of the specification, are used to explain the exemplary implementation of the embodiments. The drawings shown are for illustrative purposes only and do not limit the scope of the claims. In all drawings, the same reference numerals refer to similar but not necessarily identical elements.

[0020] Figure 1 A schematic diagram of the basic flow of a brightness control method for a vehicle projection headlight provided in an embodiment of the present application;

[0021] Figure 2 A detailed flow chart of a brightness control method for a vehicle projection headlight provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the functional modules of a brightness control device for a vehicle projection headlight provided in one embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0025] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0026] In order to solve the problem that the car projection headlight in the related art cannot take into account both the visual comfort and recognizability of the projection target, an embodiment of the present application provides a brightness control method for a car projection headlight, which can be applied to electronic devices such as vehicle-mounted terminals, such as Figure 1 This is a basic flow chart of the brightness control method of the automotive projection headlight provided in this embodiment. The brightness control method includes the following steps:

[0027] Step 101: Acquire the target brightness of the luminous target projected by the automobile projection headlight, and acquire the ambient brightness of the surrounding environment of the luminous target.

[0028] The luminous target of this embodiment may be any customized, personalized graphic logo, and the projection subject may be the road surface, ground, wall, etc. near the car.

[0029] In an optional implementation of this embodiment, the target brightness and the ambient brightness can be obtained through data collected by a specific vehicle-mounted optical measurement device (such as a brightness meter, a spectrometer, etc.).

[0030] In another optional implementation of this embodiment, a two-dimensional image can also be collected for the imaging area including the luminous target projected by the car's projection headlights; based on the image information of the two-dimensional image, the target brightness of the luminous target and the ambient brightness of the environment surrounding the luminous target are obtained.

[0031] Specifically, in practical applications, two-dimensional images can be obtained by taking pictures with a vehicle-mounted camera, which is usually conventional front-mounted hardware and mainly serves functions such as intelligent driving. This embodiment reuses it in the vehicle projection headlight control scene, which is more cost-effective than installing independent vehicle-mounted optical measurement equipment such as brightness meters, and has wide feasibility. It is worth mentioning that for the luminous target area and the surrounding environment area in the two-dimensional image, this embodiment obtains the optical indicators at the pixel level in each area, and then the brightness of the luminous target area and the surrounding environment area can be calculated using the integral method, the average method, the weighted method, etc.

[0032] In an optional implementation of this embodiment, the above-mentioned acquisition of the target brightness of the luminous target projected by the automobile projection headlight includes: taking the edge of the luminous target projected by the automobile projection headlight as a reference, selecting a preset peripheral area of ​​the luminous target in the luminous target; and acquiring the target brightness of the peripheral area of ​​the luminous target. And / or, acquiring the ambient brightness of the surrounding environment of the luminous target includes: taking the edge of the luminous target projected by the automobile projection headlight as a reference, selecting an ambient area around the luminous target within a preset extension range; and acquiring the ambient brightness of the selected ambient area.

[0033] Specifically, in practical applications, the glare effect is usually caused by a relatively strong difference in light and dark. Therefore, when performing optical analysis, the area that deserves more attention should be the adjacent area between the target and the environment. Therefore, this embodiment takes the edge of the projection target of the automobile projection headlight as a reference, extends a certain range inward to select a peripheral area to obtain the target brightness for subsequent analysis, and extends a certain range outward to select an environmental area to obtain the corresponding environmental brightness.

[0034] Step 102: Calculate the brightness contrast between the target brightness and the ambient brightness.

[0035] Specifically, the brightness contrast of this embodiment is used to measure the brightness difference between the projection target and the surrounding environment. In practical applications, the brightness contrast can be obtained by dividing the values ​​of the two.

[0036] Step 103: Compare the brightness contrast with a preset contrast reference range.

[0037] Among them, the contrast reference range of this embodiment corresponds to a glare index of the luminous target that is lower than a preset index threshold and a luminous target recognition degree that is higher than a preset recognition degree threshold. For the brightness control method of this embodiment, the core implementation purpose is to simultaneously ensure the visual comfort and recognizability of the projection target. Therefore, when performing the pre-optical analysis in this embodiment, the optical parameters referenced should be adapted to low glare index and high recognition degree. It is worth mentioning that this embodiment can only preset a unified contrast reference range, such as 10:1 to 200:1, or preset multiple different contrast reference ranges to adapt to different application scenarios.

[0038] In an optional implementation manner of this embodiment, before comparing the brightness contrast with the preset contrast reference range, the method further includes: acquiring environmental attribute information of the surrounding environment of the luminous target; and determining a corresponding contrast reference range based on the environmental attribute information.

[0039] The environmental attribute information of this embodiment includes at least one of the following: environmental material characteristics, environmental status, and the environmental material characteristics are related to the reflection characteristics of objects in the environment, and the environmental status includes a bright environment or a dark environment. In this embodiment, in order to ensure the headlight control accuracy in different scenes, the contrast reference range can be determined according to the actual environmental attributes. It is worth mentioning that for the specific method of obtaining the environmental status, this embodiment can compare the ambient brightness of the environment around the luminous target with a preset brightness threshold (for example, 10cd / m 2 ) is compared, and then the environmental state is determined according to the comparison result, wherein when the environmental brightness is greater than the brightness threshold, the current environment is determined to be a bright environment, otherwise, it is a dark environment.

[0040] It should also be noted that the usage scenario of the car is a road driving scenario, so the lighting environment of the car projection headlights is generally a road environment, and the road environment includes the following components: road surface, roadside objects, then, the environmental material characteristics are usually related to the road surface material characteristics (such as the reflection characteristics of asphalt pavement and concrete pavement) and / or the roadside object material characteristics (such as the reflection characteristics of roadside vegetation and roadside buildings).

[0041] In an optional implementation of this embodiment, the above-mentioned calculation of the brightness contrast between the target brightness and the ambient brightness includes: extracting the ambient brightness of the road surface surrounding the luminous target from the ambient brightness, and calculating the brightness contrast between the target brightness and the ambient brightness of the road surface. Correspondingly, before comparing the brightness contrast with the preset contrast reference range, it also includes: extracting the non-road environment brightness on both sides of the luminous target from the ambient brightness, and calculating the brightness contrast between the ambient brightness of the road surface and the brightness of the non-road environment on both sides.

[0042] In actual applications, when the car projection headlight projects a luminous target, the road environment around the luminous target and the non-road environment on both sides (i.e., the environment where the roadside objects are located) will be illuminated. Therefore, in order to achieve the best headlight brightness optimization effect, this embodiment takes into account the comprehensive field of view of the environment, not only the brightness difference between the projected target and the surrounding road environment, but also the brightness difference between the surrounding road environment and the non-road environment on both sides, and then combines these two brightness contrasts to comprehensively analyze the visual comfort and recognition of the currently projected luminous target. Optionally, the contrast reference range of the brightness contrast between the target brightness and the surrounding road environment brightness can be less than or equal to 200:1, and the contrast reference range of the brightness contrast between the surrounding road environment brightness and the non-road environment brightness on both sides can be greater than or equal to 0.5 and less than 1.

[0043] Step 104: If the brightness contrast exceeds the contrast reference range, a corresponding brightness adjustment signal is generated according to a deviation index of the brightness contrast relative to the contrast reference range to control the automobile projection headlight to adjust the luminous target brightness accordingly.

[0044] In actual applications, if the brightness contrast exceeds the reference range, it indicates that the current headlight working parameters are inappropriate, and the projected luminous target is either too low in brightness to ensure sufficient recognition, or too high in brightness to produce a large glare effect, making it impossible to ensure visual comfort. Based on this, this embodiment calculates the deviation value or degree of deviation of the actual brightness contrast relative to the reference range, and then adaptively generates a brightness adjustment signal to instruct the automotive projection headlight to adjust the headlight working parameters, so that the brightness of the projected luminous target is adaptively adjusted, thereby achieving a comprehensive optimization effect of low glare and high recognition.

[0045] In an optional implementation of the present embodiment, if the brightness contrast is greater than the upper limit value of the contrast reference range, a corresponding brightness reduction signal is generated according to the deviation index of the brightness contrast relative to the upper limit value, so as to control the automobile projection headlights to correspondingly reduce the brightness of the luminous target; if the brightness contrast is less than the lower limit value of the contrast reference range, a corresponding brightness increase signal is generated according to the deviation index of the brightness contrast relative to the lower limit value, so as to control the automobile projection headlights to correspondingly increase the brightness of the luminous target.

[0046] In practical applications, when the brightness contrast is greater than the upper limit of the contrast reference range (for example, the aforementioned 200:1), it means that the brightness of the luminous target is too high compared to the brightness of the surrounding environment, and there is a large glare effect. The brightness of the luminous target needs to be appropriately reduced, and the scale is reduced to ensure that the luminous target is recognizable while the glare effect is within the acceptable range of the human eye. In addition, when the brightness contrast is less than the lower limit of the contrast reference range (for example, the aforementioned 10:1), it means that the brightness of the luminous target is too low compared to the brightness of the surrounding environment, resulting in that the recognizability of the luminous target cannot be guaranteed. In this case, the brightness of the luminous target needs to be appropriately increased, and the scale is increased to ensure that the glare effect is within the acceptable range of the human eye while the luminous target meets the requirement of being clearly recognizable.

[0047] In an optional implementation of the present embodiment, the brightness reduction signal is a transitional brightness reduction signal to control the brightness of the projection light of the automobile projection headlight to gradually decrease from the center to the edge of the self-luminous target; and / or, the brightness increase signal is a transitional brightness increase signal to control the brightness of the projection light of the automobile projection headlight to gradually increase from the edge to the center of the self-luminous target.

[0048] Specifically, the gradual decrease in brightness and the gradual increase in brightness of this embodiment can follow a linear function or a GAMMA function. This embodiment essentially controls the car projection headlights to project multi-level transition light, and the edge brightness of the luminous target is close to the ambient brightness, which can better control the glare effect of the luminous target on the human eye.

[0049] In an optional implementation of the present embodiment, after comparing the brightness contrast with the preset contrast reference range, the method further includes: if the brightness contrast is within the contrast reference range, comparing the target brightness with the preset brightness range; wherein the luminous target recognition degree corresponding to the brightness range meets the clear recognition requirement; if the target brightness is greater than the upper limit value of the brightness range, a corresponding brightness reduction signal is generated in combination with a deviation index between the target brightness and the upper limit value of the brightness range to control the vehicle projection headlights to correspondingly reduce the luminous target brightness; if the target brightness is less than the lower limit value of the brightness range, a corresponding brightness increase signal is generated in combination with a deviation index between the target brightness and the lower limit value of the brightness range to control the vehicle projection headlights to correspondingly increase the luminous target brightness.

[0050] Specifically, in practical applications, the contrast reference range can be set based on the basic recognition requirements, and this embodiment can further set a luminous target brightness range that meets the clear recognition requirements, such as [10,200] cd / m 2 . In this embodiment, for the case where the brightness contrast is within the contrast reference range, this embodiment further provides an optimization mechanism to better balance the glare perception and the recognition of the luminous target, that is, the brightness of the luminous target is compared with the brightness reference range. If it exceeds the upper limit of the brightness reference range, although the recognition of the luminous target will be better, it will make the glare perception adaptation improve, that is, the high brightness behavior is a meaningless behavior, so this embodiment controls the car projection headlights to appropriately reduce the brightness of the luminous target so that the brightness of the luminous target is within the brightness reference range, thereby optimizing the glare effect. In addition, if the brightness of the luminous target is lower than the lower limit of the brightness reference range, although the glare effect of the luminous target is low, the brightness of the luminous target is appropriately increased so that the brightness of the luminous target is within the brightness reference range, the glare effect is still within an acceptable range, and the luminous target can be more recognizable.

[0051] In order to better illustrate the embodiment of the present application, an embodiment of the present application also provides a detailed brightness control method for a vehicle projection headlight, such as Figure 2 The figure is a detailed flow chart of a brightness control method provided in an embodiment of the present application, which specifically includes the following process:

[0052] Step 201, collecting a two-dimensional image of an imaging area including a luminous target projected by a vehicle projection headlight;

[0053] Step 202: acquiring the target brightness of the luminous target and the ambient brightness of the surrounding environment of the luminous target based on the image information of the two-dimensional image;

[0054] Step 203, calculating the brightness contrast between the target brightness and the ambient brightness;

[0055] Step 204: Acquire the environmental material characteristics and environmental status of the surrounding environment of the luminous target, and determine the corresponding contrast reference range based on the environmental material characteristics and environmental status;

[0056] Step 205, comparing the brightness contrast with a preset contrast reference range;

[0057] Step 206: If the brightness contrast is greater than the upper limit of the contrast reference range, a corresponding brightness reduction signal is generated according to a deviation index of the brightness contrast relative to the upper limit, so as to control the automobile projection headlight to reduce the brightness of the luminous target accordingly;

[0058] Step 207: If the brightness contrast is less than the lower limit of the contrast reference range, a corresponding brightness enhancement signal is generated according to a deviation index of the brightness contrast relative to the lower limit to control the automobile projection headlight to correspondingly enhance the brightness of the luminous target.

[0059] It should be understood that the size of the serial number of each step in this embodiment does not mean the order of execution of the steps. The execution order of each step should be determined by its function and internal logic, and should not constitute a sole limitation on the implementation process of the embodiment of this application.

[0060] Figure 3 A brightness control device for a car projection headlight is provided in one embodiment of the present application. The brightness control device can be used to implement the brightness control method in the above embodiment, and mainly includes:

[0061] The acquisition module 301 is used to acquire the target brightness of the luminous target projected by the automobile projection headlight, and acquire the ambient brightness of the surrounding environment of the luminous target;

[0062] A calculation module 302 is used to calculate the brightness contrast between the target brightness and the ambient brightness;

[0063] A comparison module 303 is used to compare the brightness contrast with a preset contrast reference range; wherein the glare index of the luminous target corresponding to the contrast reference range is lower than a preset index threshold and the luminous target recognition is higher than a preset recognition threshold;

[0064] The control module 304 is used to generate a corresponding brightness adjustment signal according to a deviation index of the brightness contrast relative to the contrast reference range if the brightness contrast exceeds the contrast reference range, so as to control the automobile projection headlight to adjust the luminous target brightness accordingly.

[0065] In an optional implementation of the present embodiment, the brightness control device of the automobile projection headlight also includes: a determination module, used to obtain environmental attribute information of the surrounding environment of the luminous target; wherein the environmental attribute information includes at least one of the following: environmental material characteristics, environmental state, the environmental material characteristics are related to the reflection characteristics of objects in the environment, and the environmental state includes a bright environment or a dark environment; and determining a corresponding contrast reference range based on the environmental attribute information.

[0066] In an optional implementation of this embodiment, the comparison module is also used to: if the brightness contrast is within the contrast reference range, compare the target brightness with the preset brightness range; wherein the luminous target recognition corresponding to the brightness range meets the clear recognition requirement. Correspondingly, the control module is also used to: if the target brightness is greater than the upper limit of the brightness range, generate a corresponding brightness reduction signal in combination with the deviation index between the target brightness and the upper limit of the brightness range to control the car projection headlights to reduce the luminous target brightness accordingly; if the target brightness is less than the lower limit of the brightness range, generate a corresponding brightness increase signal in combination with the deviation index between the target brightness and the lower limit of the brightness range to control the car projection headlights to increase the luminous target brightness accordingly.

[0067] It should be noted that the brightness control methods of the automobile projection headlights in the aforementioned method embodiments can be implemented based on the brightness control device of the automobile projection headlights provided in this embodiment. Ordinary technicians in the relevant field can clearly understand that for the convenience and conciseness of description, the specific working process of the brightness control device of the automobile projection headlights described in this embodiment can be implemented by referring to the corresponding working process in the aforementioned method embodiments, and will not be repeated here.

[0068] Based on the technical solution of the embodiment of the present application, the target brightness of the luminous target projected by the automobile projection headlight is obtained, and the ambient brightness of the environment around the luminous target is obtained; the brightness contrast between the target brightness and the ambient brightness is calculated; the brightness contrast is compared with the preset contrast reference range; wherein the glare index of the luminous target corresponding to the contrast reference range is lower than the preset index threshold and the luminous target recognition is higher than the preset recognition threshold; if the brightness contrast exceeds the contrast reference range, a corresponding brightness adjustment signal is generated according to the deviation index of the brightness contrast relative to the contrast reference range to control the automobile projection headlight to adjust the brightness of the luminous target accordingly. Through the implementation of the solution of the present application, the brightness contrast analysis is performed in combination with the projection target brightness and the ambient brightness of the automobile projection headlight, and the headlight brightness is adaptively adjusted, which reduces the glare effect while ensuring the recognition of the projection target of the automobile projection headlight, that is, it has both visual comfort and recognizability.

[0069] Figure 4 An electronic device is provided in one embodiment of the present application. The electronic device can be used to implement the brightness control method of the automobile projection headlight in the above-mentioned embodiment, and mainly includes: a memory 401 and a processor 402. The memory 401 stores a computer program 403 that can be run on the processor 402. The memory 401 and the processor 402 are in communication connection. When the processor 402 executes the computer program 403, the brightness control method of the automobile projection headlight in the above-mentioned embodiment is implemented. The number of processors 402 can be one or more.

[0070] The memory 401 may be a high-speed random access memory (RAM) memory, or a non-volatile memory, such as a disk memory. The memory 401 is used to store executable program codes, and the processor 402 is coupled to the memory 401 .

[0071] Furthermore, the present application also provides a computer-readable storage medium, which may be provided in the electronic device in the above embodiments. Figure 4 Memory in the illustrated embodiment.

[0072] The computer readable storage medium stores a computer program, and when the computer program is executed by the processor, the brightness control method of the automobile projection headlight in the above-mentioned embodiment is implemented. Furthermore, the computer storable medium can also be a U disk, a mobile hard disk, a read-only memory (ROM), a RAM, a magnetic disk or an optical disk, etc., which can store program codes.

[0073] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0074] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0075] In addition, each functional module in each embodiment of the present application can be integrated into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

[0076] If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a readable storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned readable storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0077] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0078] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0079] The above is a description of the brightness control method, device, equipment and storage medium for the automotive projection headlights provided in this application. For technicians in this field, according to the ideas of the embodiments of this application, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A method for controlling the brightness of a vehicle projection headlight, characterized in that: include: Obtaining the target brightness of the luminous target projected by the automobile projection headlight, and obtaining the ambient brightness of the environment surrounding the luminous target; Calculating the brightness contrast between the target brightness and the ambient brightness; The brightness contrast is compared with a preset contrast reference range; wherein the glare index of the luminous target corresponding to the contrast reference range is lower than a preset index threshold and the luminous target recognition degree is higher than a preset recognition degree threshold; If the brightness contrast exceeds the contrast reference range, a corresponding brightness adjustment signal is generated according to a deviation index of the brightness contrast relative to the contrast reference range to control the automobile projection headlight to adjust the luminous target brightness accordingly.

2. The brightness control method according to claim 1, characterized in that: The step of obtaining the target brightness of the luminous target projected by the automobile projection headlights and obtaining the ambient brightness of the surrounding environment of the luminous area includes: Acquiring a two-dimensional image of an imaging area including a light-emitting target projected by a projector headlight of the vehicle; Based on the image information of the two-dimensional image, the target brightness of the luminous target and the ambient brightness of the surrounding environment of the luminous target are acquired.

3. The brightness control method according to claim 1, characterized in that: Before comparing the brightness contrast with the preset contrast reference range, the method further includes: Acquire environmental attribute information of the surrounding environment of the luminous target; wherein the environmental attribute information includes at least one of the following: environmental material characteristics and environmental state, wherein the environmental material characteristics are associated with the reflection characteristics of objects in the environment, and the environmental state includes a bright environment or a dark environment; The corresponding contrast reference range is determined based on the environmental attribute information.

4. The brightness control method according to claim 1, characterized in that: The step of obtaining the target brightness of the luminous target projected by the automobile projection headlight comprises: Taking the edge of the luminous target projected by the automobile projection headlight as a reference, a preset luminous target peripheral area is selected from the luminous target; Acquire the target brightness of the peripheral area of ​​the luminous target; And / or, obtaining the ambient brightness of the surrounding environment of the luminous target includes: Taking the edge of the luminous target projected by the car headlight as a reference, select the environment area around the luminous target within the preset extension range; Obtain the ambient brightness of the selected ambient area.

5. The brightness control method according to claim 1, characterized in that: If the brightness contrast exceeds the contrast reference range, a corresponding brightness adjustment signal is generated according to a deviation index of the brightness contrast relative to the contrast reference range to control the automobile projection headlight to adjust the brightness of the light-emitting target accordingly, including: If the brightness contrast is greater than the upper limit of the contrast reference range, a corresponding brightness reduction signal is generated according to a deviation index of the brightness contrast relative to the upper limit, so as to control the automotive projection headlight to reduce the brightness of the luminous target accordingly; If the brightness contrast is less than the lower limit of the contrast reference range, a corresponding brightness enhancement signal is generated according to a deviation index of the brightness contrast relative to the lower limit to control the automotive projection headlight to correspondingly enhance the brightness of the luminous target.

6. The brightness control method according to claim 5, characterized in that: The brightness reduction signal is a transitional brightness reduction signal to control the brightness of the projection light of the automobile projection headlight to gradually decrease from the center to the edge of the light-emitting target; And / or, the brightness enhancement signal is a transitional brightness enhancement signal to control the brightness of the projection light of the automobile projection headlight to gradually increase from the edge to the center of the light-emitting target.

7. The brightness control method according to claim 1, characterized in that: The calculating the brightness contrast between the target brightness and the ambient brightness includes: Extracting the ambient road brightness of the luminous target from the ambient brightness, and calculating the brightness contrast between the target brightness and the ambient road brightness; Before comparing the brightness contrast with the preset contrast reference range, the method further includes: The non-road environment brightness on both sides of the luminous target is extracted from the environment brightness, and the brightness contrast between the surrounding road environment brightness and the non-road environment brightness on both sides is calculated.

8. The brightness control method according to any one of claims 1 to 7, characterized in that: After comparing the brightness contrast with the preset contrast reference range, the method further includes: If the brightness contrast is within the contrast reference range, the target brightness is compared with a preset brightness range; wherein the luminous target recognition corresponding to the brightness range meets the clear recognition requirement; If the target brightness is greater than the upper limit of the brightness range, a corresponding brightness reduction signal is generated in combination with a deviation index between the target brightness and the upper limit of the brightness range to control the vehicle projection headlight to reduce the target brightness accordingly; If the target brightness is less than the lower limit of the brightness range, a corresponding brightness enhancement signal is generated in combination with a deviation index between the target brightness and the lower limit of the brightness range to control the vehicle projection headlight to correspondingly enhance the target brightness.

9. A brightness control device for a car projection headlight, characterized in that: include: An acquisition module, used to acquire the target brightness of the luminous target projected by the automobile projection headlight, and to acquire the ambient brightness of the surrounding environment of the luminous target; A calculation module, used for calculating the brightness contrast between the target brightness and the ambient brightness; A comparison module, used to compare the brightness contrast with a preset contrast reference range; wherein the glare index of the luminous target corresponding to the contrast reference range is lower than a preset index threshold and the luminous target recognition degree is higher than a preset recognition degree threshold; The control module is used to generate a corresponding brightness adjustment signal according to a deviation index of the brightness contrast relative to the contrast reference range if the brightness contrast exceeds the contrast reference range, so as to control the automobile projection headlight to adjust the luminous target brightness accordingly.

10. An electronic device, characterized in that: The device comprises a memory and a processor, wherein: The processor is used to execute the computer program stored in the memory; When the processor executes the computer program, the steps in the brightness control method of the automobile projection headlight described in any one of claims 1 to 8 are implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps in the brightness control method of an automobile projection headlight as claimed in any one of claims 1 to 8 are implemented.

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