Interactive road sign system

Abstract

The invention relates to the technical field of image data processing, in particular to an interactive road sign system which comprises a data acquisition module, a determination module, an adjustment module, an adjustment module, a judgment module, a drawing module and a correction module. Through real-time monitoring and dynamic adjustment, various environmental changes can be effectively handled, and it is ensured that road sign information is always clearly visible under different weather, visibility and driving conditions. The system automatically adjusts the display contrast and definition of the road sign by comprehensively considering water mist, particle diameter, facial definition and real-time position, ensures that the target can accurately receive the road sign information under the condition of severe weather such as haze and rainwater or limited sight distance, and improves the accuracy of the target. The system also analyzes the association between the road sign display effect and the visibility by drawing a change curve, further optimizes the display setting, and effectively solves the problem that the display effect of the system is unstable in a complex environment due to strong light source dependence.

Description

Technical Field

[0001] The present invention relates to the technical field of image data processing, and in particular to an interactive road sign system. Background Art

[0002] As urban environments become increasingly complex, pedestrians rely on road sign systems to provide accurate guidance during their daily journeys. However, conventional road sign systems often struggle to maintain sufficient clarity and visibility in adverse weather conditions, such as light haze, drizzle, or low light. These adverse weather conditions can affect the recognition of road signs, increasing the risk of pedestrians getting lost or misjudging their routes. Therefore, there is an urgent need for an interactive road sign system that can automatically adjust its display content based on weather and environmental changes, thereby improving visibility and pedestrian safety in varying weather conditions.

[0003] Patent document CN101034515A discloses a modular system for luminous signs, especially road signs, which includes a support structure and a plurality of modules, usually in the form of letters, graphics or symbols, which can be positioned on the support structure. Each module is composed of a main body and has at least one LED light source arranged in the main body and at least one pair of terminals for electrically connecting the LED light source to a power supply. The main body is made of a substantially transparent material that can serve as a light conductor.

[0004] It can be seen that the display effect of this system is highly dependent on the brightness and stability of the LED light source. Therefore, under long-term use or in harsh environments such as high temperature and humidity, the degradation or unstable performance of the LED light source will lead to a decrease in the display effect; since the system uses multiple LED light sources and each module has an independent light source, the overall system energy consumption is high, especially in scenarios that require long-term continuous operation or large-area coverage, resulting in uneconomical power consumption. Summary of the Invention

[0005] To this end, the present invention provides an interactive road sign system, which is used to automatically adjust the display contrast and clarity of the road sign by comprehensively considering water mist, particle diameter, facial clarity and real-time position, so as to overcome the problem in the prior art that the system has unstable display effect in complex environments due to its strong dependence on light sources.

[0006] To achieve the above object, the present invention provides an interactive road sign system, comprising: A data acquisition module is used to collect the real-time area and average particle diameter of water mist on the surface of the camera shield on the interactive road sign, as well as the real-time facial clarity and position of targets in the monitoring area; The interactive road sign displays road sign information with a preset contrast and a preset display clarity; a determination module connected to the data acquisition module, for determining regional visibility according to the real-time area and the real-time average particle diameter; an adjustment module connected to the determination module, configured to adjust the preset contrast according to the visibility of the area to form a temporary contrast; an adjustment module, connected to the data acquisition module and the adjustment module respectively, for adjusting the temporary contrast according to the real-time facial clarity to form an adjusted contrast; a determination module connected to the data acquisition module, configured to determine whether the preset display clarity needs to be corrected based on the real-time position and the preset standard distance, and to form a determination result; a drawing module, connected to the data acquisition module, the determination module, and the judgment module, respectively, for drawing a picture change curve based on the judgment result, the real-time facial clarity, and the real-time position, and drawing a visibility change curve based on the judgment result, the real-time position, and the regional visibility; A correction module is connected to the drawing module and is used to correct the preset display clarity according to the picture change curve and the visibility change curve to form an adjusted display clarity.

[0007] Furthermore, the determining module includes: an area deviation calculation unit, configured to calculate a relative deviation between the real-time area and a preset standard area to form an area deviation; a diameter fluctuation calculation unit, for calculating the standard deviation of the real-time average particle diameter to form a diameter fluctuation value; a fluctuation deviation calculation unit, connected to the diameter fluctuation calculation unit, for calculating the diameter fluctuation deviation according to the diameter fluctuation value; A weighted calculation unit is connected to the area deviation calculation unit and the fluctuation deviation calculation unit respectively, and is used to perform weighted summation according to a preset area weight, a preset diameter weight, the area deviation and the diameter fluctuation deviation to form regional visibility.

[0008] Furthermore, the fluctuation deviation calculation unit includes: a fluctuation comparison subunit, for comparing the diameter fluctuation value with a preset diameter fluctuation threshold value to form a fluctuation comparison result; The fluctuation deviation calculation subunit is connected to the fluctuation comparison subunit and is used to calculate the relative deviation between the diameter fluctuation value and the preset diameter fluctuation threshold when the fluctuation comparison result shows that the diameter fluctuation value is greater than the preset diameter fluctuation threshold, so as to form the diameter fluctuation deviation.

[0009] Furthermore, the adjustment module includes: a visibility comparison unit, configured to compare the visibility of the area with a preset standard visibility to form a visibility comparison result; An adjustment unit is connected to the visibility contrast and is used to adjust the preset contrast according to a preset adjustment coefficient and a relative deviation between the regional visibility and the preset standard visibility to form a temporary contrast when the visibility comparison result shows that the regional visibility is less than the preset standard visibility.

[0010] Furthermore, the adjustment module includes: A facial clarity comparison unit, configured to compare the real-time facial clarity with a preset standard clarity to form a facial clarity comparison result; an adjustment unit connected to the facial clarity contrast unit and configured to adjust the temporary contrast according to a relative deviation between the real-time facial clarity and the preset standard clarity and a preset adjustment coefficient to form an adjusted contrast when the real-time facial clarity contrast result indicates that the facial clarity is less than the preset standard clarity.

[0011] Furthermore, the determination module includes: a position calculation unit, configured to calculate a distance between the real-time position and the landmark to form a first distance; a position comparison unit, connected to the position calculation unit, for comparing the first distance with the preset standard distance to form a position comparison result; a recording unit connected to the position comparison unit, for recording a duration of the position comparison result when the position comparison result indicates that the first distance is smaller than the preset standard distance; A determination unit is connected to the recording unit and is used to determine whether the preset display clarity needs to be corrected based on a comparison result between the duration and a preset standard duration, thereby forming a determination result.

[0012] Furthermore, the drawing module includes: a picture curve drawing unit, configured to draw a curve of the real-time facial clarity change based on the real-time position change to form a picture change curve when the determination result is that the duration is greater than a preset standard duration; The visibility curve drawing unit is used to draw a curve of the regional visibility based on the real-time position change to form a visibility change curve when the determination result is that the duration is greater than a preset standard duration.

[0013] Furthermore, the correction module includes: a consistency calculation unit, configured to calculate a Pearson correlation coefficient between the image change curve and the visibility change curve to form a change consistency; The correction unit is used to correct the preset display definition according to the change consistency to form an adjusted display definition.

[0014] Furthermore, the correction unit includes: A consistency comparison subunit, used to compare the change consistency with a preset standard consistency to form a consistency comparison result; A correction subunit is connected to the consistency comparison subunit and is used to correct the preset display clarity according to the relative deviation between the change consistency and the preset standard consistency and the preset correction coefficient when the consistency comparison result is that the change consistency is less than the preset standard consistency, thereby forming an adjusted display clarity.

[0015] Furthermore, the correction unit further includes: an adjustment fluctuation calculation subunit, connected to the correction subunit, for calculating the standard deviation of all the adjusted display definition quantities within a preset fluctuation adjustment time period to form an adjustment fluctuation value; The standard adjustment subunit is connected to the adjustment fluctuation calculation subunit and is used to adjust the preset standard consistency according to the relative deviation between the adjustment fluctuation value and the preset standard adjustment fluctuation value and the preset standard adjustment coefficient when the adjustment fluctuation value is greater than the preset standard adjustment fluctuation value.

[0016] Compared with existing technologies, the present invention offers the advantage of effectively responding to various environmental changes through real-time monitoring and dynamic adjustment, ensuring that road sign information remains clearly visible in varying weather, visibility, and driving conditions. The system automatically adjusts the display contrast and clarity of road signs by comprehensively considering water mist, particle diameter, facial clarity, and real-time location, ensuring that targets can accurately receive road sign information even in inclement weather such as haze and rain, or when visibility is limited. The system also analyzes the correlation between road sign display and visibility by plotting change curves, further optimizing display settings. Furthermore, the real-time correction function effectively reduces potential risks associated with visibility changes, enhancing the system's intelligence, adaptability, and reliability, and effectively addressing the issue of unstable display effects in complex environments due to the system's strong dependence on light sources.

[0017] Furthermore, through multiple calculation steps, the water mist conditions around interactive road signs are accurately evaluated, which can accurately capture the dynamic changes of water mist coverage and particle size in the environment, and provide real-time feedback to the interactive road sign system to ensure automatic adjustment of display clarity and contrast, thereby improving the system's visibility and user experience under complex weather conditions and ensuring the accurate transmission of road information.

[0018] Furthermore, by calculating fluctuation deviations, the system can monitor and adjust the clarity of road sign displays in real time, especially in cases where the water mist particles are large or the fluctuations are large, to ensure the accuracy of the displayed information.

[0019] Furthermore, by dynamically adjusting the preset contrast, the system can adaptively adjust the display effect of road signs according to changes in real-time visibility, ensuring that road sign information is still clearly visible even in environmental conditions with low visibility. This can effectively improve the adaptability and robustness of the system, improve user experience, and enhance road safety, especially in low visibility conditions such as fog, haze, rain and snow, to ensure the accuracy of information transmission.

[0020] Furthermore, by adjusting the contrast in real time, it is ensured that the displayed information of the road signs always maintains high readability and accuracy under different lighting and environmental conditions, thereby improving the efficiency of information communication.

[0021] Furthermore, based on the position changes monitored in real time, it is determined whether the display clarity of the road sign needs to be adjusted. By comparing the difference and duration between the first distance and the preset standard distance, it is ensured that the display clarity is corrected in specific circumstances, thereby further improving the display effect of the interactive road sign and the effectiveness of information communication, especially when the target distance is too close, to avoid the display being too blurry or inaccurate, which helps to improve road safety and information recognition accuracy.

[0022] Furthermore, by drawing picture change curves and visibility change curves, the system can intuitively reflect the changing trends of road sign display clarity and regional visibility, thereby improving the effectiveness and readability of road sign information transmission.

[0023] Furthermore, by introducing the calculation of change consistency, the system can comprehensively evaluate the correlation between picture clarity and visibility, ensuring the rationality and accuracy of the display effect in actual applications. The adjusted display clarity can effectively respond to different environmental changes and optimize the quality of information display.

[0024] Furthermore, by comparing the consistency of changes with a preset standard, the system can accurately determine whether the display meets the expected clarity standard. If the consistency is detected to be low, the system automatically makes corresponding corrections, adjusting the display clarity to improve the accuracy of information transmission. This can enhance the adaptive ability of road sign display and maintain a clear and easy-to-read display in changing environments.

[0025] Furthermore, by monitoring display clarity adjustment fluctuations in real time, the system can effectively address instabilities caused by environmental changes, ensuring more precise and stable display clarity adjustments. When display clarity adjustment fluctuations exceed a preset range, the correction unit can promptly adjust the consistency standard to maintain the system's display quality within an acceptable range, thereby improving the system's adaptability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the interactive road sign system of this embodiment; Figure 2 is a schematic diagram of the interactive road sign of this embodiment; Figure 3 This is a decision logic diagram for the diameter fluctuation deviation calculation subunit in this embodiment; Figure 4 This is a decision logic diagram for adjusting the preset contrast by the adjustment unit in this embodiment. DETAILED DESCRIPTION

[0027] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0028] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0029] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0030] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] See also Figure 1 , which is a schematic diagram of the interactive road sign system of this embodiment; Please continue reading Figure 2 As shown, it is a schematic diagram of the interactive road sign of this embodiment; This embodiment provides an interactive road sign system, including: a data acquisition module for collecting, through a camera, the real-time area and average particle diameter of water mist on the surface of a camera protective cover 1 on the interactive road sign, the real-time facial clarity and position of targets within the monitoring area, and displaying the road sign information on a display board 2 with a preset contrast and preset display clarity on the interactive road sign; a determination module connected to the data acquisition module, for determining regional visibility according to the real-time area and the real-time average particle diameter; an adjustment module connected to the determination module, configured to adjust the preset contrast according to the visibility of the area to form a temporary contrast; an adjustment module, connected to the data acquisition module and the adjustment module respectively, for adjusting the temporary contrast according to the real-time facial clarity to form an adjusted contrast; a determination module connected to the data acquisition module, configured to determine whether the preset display clarity needs to be corrected based on the real-time position and the preset standard distance, and to form a determination result; a drawing module, connected to the data acquisition module, the determination module, and the judgment module, respectively, for drawing a picture change curve based on the judgment result, the real-time facial clarity, and the real-time position, and drawing a visibility change curve based on the judgment result, the real-time position, and the regional visibility; A correction module is connected to the drawing module and is used to correct the preset display clarity according to the picture change curve and the visibility change curve to form an adjusted display clarity.

[0032] Real-time facial clarity refers to the level of clarity assessed based on the quality of facial images captured by cameras in interactive road sign systems. This level of clarity is typically determined by factors such as image resolution, lighting conditions, camera focus, and image noise. Real-time facial clarity is typically determined through image processing algorithms that analyze facial images captured by cameras, calculating facial detail and contrast. Facial recognition or image clarity algorithms are typically used to assess whether these images meet established clarity standards. In this embodiment, real-time facial clarity is determined by performing image quality analysis on facial images captured by cameras. First, the camera captures the image, and then image processing algorithms (such as image contrast analysis, blur detection, or facial recognition) calculate the image clarity. These algorithms assess the image resolution, noise level, contrast, and clarity of facial features to determine the real-time facial clarity value.

[0033] The preset contrast is the initial display contrast setting, typically set between 50% and 100% based on the sign's ambient lighting conditions, the characteristics of the display device, and visual requirements. In this embodiment, the preset contrast is set to 70%, which balances brightness and readability in most common environments, ensuring a clear display and avoiding visual discomfort caused by excessive contrast.

[0034] The preset display resolution refers to the initial image or text display accuracy, which depends on the resolution of the display device, viewing distance, and environmental conditions, and is typically set between 720p and 1080p. In this embodiment, the preset display resolution is set to 1080p to ensure that most targets can clearly see the road sign information in common usage scenarios while avoiding unnecessary computing pressure caused by excessive resolution.

[0035] The preset standard distance refers to the ideal viewing distance for road signs. It is typically set based on the sign's installation location, display size, and the viewer's viewing distance requirements, and is generally between 1 and 3 meters. In this embodiment, the preset standard distance is set to 2 meters. This distance is suitable for most urban roads or public places, ensuring clear display of road sign information and meeting the viewing needs of most targets.

[0036] The data acquisition module acquires real-time information such as mist area, particle diameter, facial clarity, and target location. The determination module calculates regional visibility based on the mist area and particle diameter. The adjustment module adjusts the sign display contrast based on visibility, creating a temporary contrast ratio. The adjustment module further optimizes the contrast based on real-time facial clarity, creating an adjusted contrast ratio. The judgment module determines whether to adjust the preset display clarity based on the distance between the target location and the sign. The drawing module uses image change curves and visibility change curves to reflect the changing relationship between the sign display and visibility. The correction module adjusts the sign display clarity based on the analysis of these curves to ensure clear presentation of sign information.

[0037] Through real-time monitoring and dynamic adjustments, it can effectively respond to various environmental changes, ensuring that road sign information remains clearly visible in varying weather, visibility, and driving conditions. The system automatically adjusts the display contrast and clarity of road signs by comprehensively considering water mist, particle diameter, facial clarity, and real-time location, ensuring that targets can accurately receive road sign information even in inclement weather such as fog and rain, or when visibility is limited. The system also analyzes the correlation between road sign display and visibility by plotting change curves to further optimize display settings. Furthermore, the real-time correction function effectively reduces potential risks associated with visibility changes, enhancing the system's intelligence, adaptability, and reliability, and effectively resolving the issue of unstable display effects in complex environments due to the system's strong dependence on light sources.

[0038] Specifically, the determination module includes: an area deviation calculation unit, configured to calculate a relative deviation between the real-time area and a preset standard area to form an area deviation; a diameter fluctuation calculation unit, for calculating the standard deviation of the real-time average particle diameter to form a diameter fluctuation value; a fluctuation deviation calculation unit, connected to the diameter fluctuation calculation unit, for calculating the diameter fluctuation deviation according to the diameter fluctuation value; A weighted calculation unit is connected to the area deviation calculation unit and the fluctuation deviation calculation unit respectively, and is used to perform weighted summation according to a preset area weight, a preset diameter weight, the area deviation and the diameter fluctuation deviation to form regional visibility.

[0039] The preset standard area is the reference area of ​​water mist coverage on the camera shield surface, which depends on the actual size of the shield and the distribution of the water mist on the surface. It is typically set between tens and hundreds of square centimeters. In this embodiment, it is set to 0.2 square meters, which effectively covers the actual water mist area of ​​a typical shield and ensures judgment accuracy under different environmental conditions. By properly setting the preset standard area, the accuracy of the system's real-time visibility judgment can be improved, avoiding errors caused by settings that are too large or too small, thereby optimizing the adjustment effect of display clarity.

[0040] The preset area weight refers to the degree to which the fog area influences the final visibility result when calculating regional visibility. It depends on the importance of area in actually affecting visibility. It is generally set between 0.3 and 0.5, and in this example, it is set to 0.4. This ensures that area deviation has an appropriate proportion in the visibility calculation, avoiding bias caused by over-reliance on area while effectively reflecting the actual impact of area on visibility.

[0041] The preset diameter weight refers to the degree to which fluctuations in the diameter of water mist particles affect the final visibility result when calculating regional visibility. This weight is typically set between 0.5 and 0.7, and in this example, it is set to 0.6. This ensures that changes in particle diameter have sufficient weight in the visibility calculation, accurately reflecting the impact of particle fluctuations on road sign visibility and providing a more precise basis for adjustment.

[0042] Regional visibility refers to the visibility level within the monitoring area of ​​an interactive road sign system, based on the coverage area and particle diameter fluctuations of the water mist on the camera shield. This comprehensive assessment reflects the degree to which road signs clearly display information. Regional visibility directly affects the clarity of road sign display content: higher visibility results in clearer information, while lower visibility can lead to blurry or difficult-to-read information. Therefore, regional visibility plays a key role in adjusting road sign display clarity and contrast, improving road safety and the effectiveness of information communication.

[0043] First, the area deviation calculation unit quantifies the difference between the real-time water mist coverage area and the preset standard area, thereby reflecting the degree of water mist expansion; then, the diameter fluctuation calculation unit measures the fluctuation of real-time particle diameter to evaluate the distribution of water mist particles; then, the fluctuation deviation calculation unit calculates the diameter fluctuation deviation by comparing the particle diameter fluctuation value with the standard value, and further refines the change in water mist concentration; finally, the weighted calculation unit comprehensively calculates the area deviation and diameter fluctuation deviation according to the preset weights to obtain the visibility value of the area, thereby providing a basis for the system to adjust the display effect in real time.

[0044] Through multiple calculation steps, the water mist situation around interactive road signs is accurately evaluated. The dynamic changes of water mist coverage and particle size in the environment can be accurately captured and fed back to the interactive road sign system in real time to ensure automatic adjustment of display clarity and contrast, thereby improving the system's visibility and user experience in complex weather conditions and ensuring the accurate transmission of road information.

[0045] Please continue reading Figure 3 As shown, it is a decision logic diagram of the diameter fluctuation deviation calculated by the fluctuation deviation calculation subunit of this embodiment; Specifically, the fluctuation deviation calculation unit includes: a fluctuation comparison subunit, for comparing the diameter fluctuation value with a preset diameter fluctuation threshold value to form a fluctuation comparison result; The fluctuation deviation calculation subunit is connected to the fluctuation comparison subunit and is used to calculate the relative deviation between the diameter fluctuation value and the preset diameter fluctuation threshold when the fluctuation comparison result shows that the diameter fluctuation value is greater than the preset diameter fluctuation threshold, so as to form the diameter fluctuation deviation.

[0046] The preset diameter fluctuation threshold is a reference value used to assess particle diameter fluctuations. It is typically set based on historical data, environmental standards, and actual application scenarios. It depends on the expected environmental conditions and tolerance for water mist impacts within the system design, and is typically set between 5% and 15%. In this embodiment, the preset diameter fluctuation threshold is set to 10%. This provides a reasonable estimate of the range of particle diameter variation under normal circumstances. When fluctuations exceed this threshold, an adjustment mechanism is promptly activated to ensure display clarity and visibility accuracy, preventing excessive fluctuations from impacting the transmission of road sign information.

[0047] First, the Fluctuation Comparison subunit compares the real-time diameter fluctuation value with the preset diameter fluctuation threshold to generate a fluctuation comparison result. Second, if the diameter fluctuation value exceeds the preset standard value, the Fluctuation Deviation Calculation subunit calculates the relative deviation based on the difference between the two values, resulting in the Diameter Fluctuation Deviation. Through this process, the system can accurately determine abnormalities in particle diameter fluctuations and further assess the extent of water mist impact.

[0048] By calculating fluctuation deviations, the system can monitor and adjust the clarity of road sign displays in real time, especially in cases where the water mist particles are large or the fluctuations are large, to ensure the accuracy of the displayed information.

[0049] Please continue reading Figure 4 As shown, it is a decision logic diagram of the adjustment unit of this embodiment for adjusting the preset contrast; Specifically, the adjustment module includes: a visibility comparison unit, configured to compare the visibility of the area with a preset standard visibility to form a visibility comparison result; An adjustment unit is connected to the visibility contrast and is used to adjust the preset contrast according to a preset adjustment coefficient and a relative deviation between the regional visibility and the preset standard visibility when the visibility comparison result shows that the regional visibility is less than the preset standard visibility, so as to form a temporary contrast, and the temporary contrast is positively correlated with the relative deviation.

[0050] The preset standard visibility is a unitless rating that indicates the visibility of road sign information under standard environmental conditions. It depends on the environmental conditions and the system's requirements for optimal display quality. The rating range is generally set between 0 and 100, with 100 representing optimal visibility and 0 indicating complete invisibility. In this embodiment, the preset standard visibility is set to 70 to ensure clear visibility of road sign information in most conditions, while also maintaining effective information transmission in inclement weather conditions by adjusting contrast and clarity. This setting ensures system stability while adapting to varying environmental conditions, ensuring the clarity and effectiveness of road sign display.

[0051] The preset adjustment factor is a parameter used to adjust the preset contrast, depending on the impact of visibility changes on clarity and the system's response speed. It is typically set between 0.1 and 1, and in this embodiment is set to 0.5. This provides appropriate contrast adjustment in poor visibility, avoiding over-adjustment that could result in an overly intense or blurred display, thereby maintaining the stability and accuracy of road sign information.

[0052] The adjustment module first compares the real-time regional visibility with a preset standard visibility to determine the visibility comparison result. If the real-time regional visibility is lower than the preset standard visibility, the adjustment unit adjusts the preset contrast ratio based on the relative deviation between the two and a preset adjustment coefficient, generating a temporary contrast ratio to optimize the display of road signs and ensure good visibility even in less-than-ideal conditions.

[0053] By dynamically adjusting the preset contrast, the system can adaptively adjust the display effect of road signs according to changes in real-time visibility, ensuring that road sign information remains clearly visible even in low-visibility environmental conditions. This can effectively improve the adaptability and robustness of the system, improve user experience, and enhance road safety, especially in low-visibility conditions such as fog, haze, rain, and snow, ensuring the accuracy of information communication.

[0054] Specifically, the adjustment module includes: A facial clarity comparison unit, configured to compare the real-time facial clarity with a preset standard clarity to form a facial clarity comparison result; An adjustment unit is connected to the facial clarity contrast unit and is used to adjust the temporary contrast according to the relative deviation between the real-time facial clarity and the preset standard clarity and a preset adjustment coefficient when the real-time facial clarity contrast result shows that the facial clarity is less than the preset standard clarity, so as to form an adjusted contrast, wherein the adjusted contrast is positively correlated with the relative deviation.

[0055] The preset adjustment coefficient is a constant value used to adjust the temporary contrast. It is usually set by the system designer based on the actual environment and application requirements. It depends on the sensitivity requirements of the road sign display system for clarity adjustment and the amplitude of contrast changes under different environmental conditions. It is usually set between 0.1 and 1.0. In this embodiment, the preset adjustment coefficient is set to 0.5, which can balance the display clarity and system stability without causing excessive adjustment, ensuring that information can be effectively conveyed in different monitoring environments.

[0056] The adjustment module uses the facial clarity comparison unit to compare real-time facial clarity with a preset standard clarity, generating a facial clarity comparison result. If real-time facial clarity falls below the preset standard clarity, the adjustment unit dynamically adjusts the temporary contrast based on the relative deviation between the two and a preset adjustment factor, thereby improving the display quality and ensuring clearer and easier-to-read information.

[0057] By adjusting the contrast in real time, the displayed information of road signs can be ensured to maintain high readability and accuracy under different lighting and environmental conditions, thereby improving the efficiency of information communication.

[0058] Specifically, the determination module includes: a position calculation unit, configured to calculate a distance between the real-time position and the landmark to form a first distance; a position comparison unit, connected to the position calculation unit, for comparing the first distance with the preset standard distance to form a position comparison result; a recording unit connected to the position comparison unit, for recording a duration of the position comparison result when the position comparison result indicates that the first distance is smaller than the preset standard distance; A determination unit is connected to the recording unit and is used to determine that the preset display clarity needs to be corrected when the duration is greater than the preset standard duration, and to determine that the preset display clarity does not need to be corrected when the duration is less than or equal to the preset standard duration, thereby forming a determination result.

[0059] The preset standard duration refers to the time threshold used in the determination module to determine the change in distance between the real-time location and the landmark. It is a standard duration based on system design requirements and actual application scenarios, depending on the system's response speed requirements. It is usually set between a few seconds and tens of seconds to balance the system's sensitivity and stability. In this embodiment, it is set to 10 seconds, which can effectively avoid frequent adjustments caused by short-term distance changes or environmental factors, while ensuring effective identification of long-term distance deviations. By appropriately setting the preset standard duration, unnecessary adjustments caused by instantaneous changes can be avoided, thereby improving system stability and user experience.

[0060] In the determination module, the position calculation unit first calculates the distance between the real-time location and the landmark, generating a first distance. The position comparison unit then compares the first distance with a preset standard distance to produce a position comparison result. If the distance between the real-time location and the landmark is less than the preset standard distance, the recording unit records the duration of this result. Finally, based on the comparison of this duration with the preset standard duration, the determination unit determines whether the preset display clarity needs to be adjusted, thereby generating a determination result.

[0061] Based on the real-time monitored position changes, it is determined whether the display clarity of the road sign needs to be adjusted. By comparing the difference and duration between the first distance and the preset standard distance, the display clarity is ensured to be corrected in specific circumstances, further improving the display effect of the interactive road sign and the effectiveness of information communication. In particular, when the target distance is too close, it avoids the display being too blurry or inaccurate, which helps to improve road safety and information recognition accuracy.

[0062] Specifically, the drawing module includes: a picture curve drawing unit, configured to draw a curve of the real-time facial clarity change based on the real-time position change to form a picture change curve when the determination result is that the duration is greater than a preset standard duration; The visibility curve drawing unit is used to draw a curve of the regional visibility based on the real-time position change to form a visibility change curve when the determination result is that the duration is greater than a preset standard duration.

[0063] The drawing module includes a picture curve drawing unit and a visibility curve drawing unit. If the determination result indicates that the duration of the display exceeds a preset standard, the picture curve drawing unit draws a picture change curve based on the relationship between real-time facial clarity and real-time position changes; the visibility curve drawing unit draws a visibility change curve based on the relationship between regional visibility and real-time position changes. These two units work together to convert real-time changing data into visual curves, helping the system monitor and analyze the dynamic changes in road sign clarity and visibility as they change position.

[0064] By drawing picture change curves and visibility change curves, the system can intuitively reflect the changing trends of road sign display clarity and regional visibility, thereby improving the effectiveness and readability of road sign information transmission.

[0065] Specifically, the correction module includes: a consistency calculation unit, configured to calculate a Pearson correlation coefficient between the image change curve and the visibility change curve to form a change consistency; The correction unit is used to correct the preset display definition according to the change consistency to form an adjusted display definition.

[0066] First, the consistency calculation unit calculates the Pearson correlation coefficient between the image change curve and the visibility change curve to determine the change consistency. Next, the correction unit adjusts the preset display clarity based on the change consistency, resulting in the adjusted display clarity. Through this process, the system automatically adjusts the road sign display based on real-time monitoring of changing display clarity and visibility trends, ensuring more accurate information transmission.

[0067] By introducing the calculation of change consistency, the system can comprehensively evaluate the correlation between picture clarity and visibility, ensuring the rationality and accuracy of the display effect in actual applications. The adjusted display clarity can effectively respond to changes in different environments and optimize the quality of information display.

[0068] Specifically, the correction unit includes: A consistency comparison subunit, used to compare the change consistency with a preset standard consistency to form a consistency comparison result; A correction subunit is connected to the consistency comparison subunit and is used to correct the preset display clarity according to the relative deviation between the change consistency and the preset standard consistency and a preset correction coefficient when the consistency comparison result is that the change consistency is less than the preset standard consistency, thereby forming an adjusted display clarity.

[0069] The preset standard consistency refers to the predetermined, ideal consistency standard value between the image change curve and the visibility change curve in the interactive sign system. It depends on the anticipated relationship between clarity and visibility during sign design, as well as the system's information transmission requirements under different environmental conditions. Typically, the preset standard consistency value is set between 0 and 1, with 1 representing perfect consistency and 0 representing perfect inconsistency. In this embodiment, the preset standard consistency is set to 0.85 to ensure a high degree of consistency between the sign's display clarity and visibility under varying environmental factors. This avoids information transmission failures due to blurry display or poor visibility, and balances the system's adaptability to changes in clarity and environmental factors without being overly sensitive or lax, thereby improving the reliability and safety of the sign system in practical applications.

[0070] First, the consistency comparison subunit compares the change consistency with the preset standard consistency to obtain a consistency comparison result. Next, the correction subunit calculates the relative deviation between the change consistency and the standard consistency based on the consistency comparison result, especially when the change consistency is less than the preset standard consistency. It then adjusts the preset display clarity using a preset correction factor, ultimately generating the adjusted display clarity. This process ensures that road sign clarity is optimized in a timely manner based on display consistency.

[0071] By comparing the consistency of changes with a preset standard, the system accurately determines whether the display meets the expected clarity standard. If the consistency is low, the system automatically makes corrections, adjusting the display clarity to improve the accuracy of information conveyed. This enhances the adaptive capabilities of road sign displays and ensures a clear, easily identifiable display in changing environments.

[0072] Specifically, the correction unit further includes: an adjustment fluctuation calculation subunit, connected to the correction subunit, for calculating the standard deviation of all the adjusted display definition quantities within a preset fluctuation adjustment time period to form an adjustment fluctuation value; The standard adjustment subunit is connected to the adjustment fluctuation calculation subunit and is used to adjust the preset standard consistency according to the relative deviation between the adjustment fluctuation value and the preset standard adjustment fluctuation value and the preset standard adjustment coefficient when the adjustment fluctuation value is greater than the preset standard adjustment fluctuation value.

[0073] The preset fluctuation adjustment duration refers to the length of the time window used to calculate display clarity adjustment fluctuations during the adjustment process. This determines the calculation period for clarity fluctuations and depends on environmental conditions, device response speed, and expected display stability. It is typically set between a few seconds and a few minutes. In this embodiment, it is set to 30 seconds to cover common variations in device response while avoiding misjudgments of frequent fluctuations caused by a too short duration.

[0074] The adjustment fluctuation calculation subunit calculates the standard deviation of all display clarity adjustments within a preset fluctuation adjustment period to obtain an adjustment fluctuation value. The standard adjustment subunit then compares this adjustment fluctuation value with a preset standard adjustment fluctuation value. If the adjustment fluctuation value exceeds the preset standard value, the correction unit adjusts the preset standard consistency based on the relative deviation between the two and a preset standard adjustment coefficient, thereby ensuring that the system's display clarity and consistency meet the set standards.

[0075] By monitoring display clarity adjustment fluctuations in real time, we can effectively address the instability caused by environmental changes and ensure more accurate and stable display clarity adjustment. When display clarity adjustment fluctuations exceed the preset range, the correction unit can promptly adjust the consistency standard to maintain the system's display effect within an acceptable range, thereby improving the system's adaptability and stability.

[0076] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0077] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An interactive road sign system, characterized in that: include: A data acquisition module is used to collect the real-time area and real-time average particle diameter of water mist on the surface of the camera shield on the interactive road sign, and the real-time facial clarity and real-time position of the target in the monitoring area; The interactive road sign displays road sign information with a preset contrast and a preset display clarity; a determination module connected to the data acquisition module, for determining regional visibility according to the real-time area and the real-time average particle diameter; an adjustment module, connected to the determination module, for adjusting the preset contrast according to the visibility of the area to form a temporary contrast; an adjustment module, which is connected to the data acquisition module and the adjustment module respectively, and is used to adjust the temporary contrast according to the real-time facial definition to form an adjusted contrast; A determination module, connected to the data acquisition module, for determining whether the preset display clarity needs to be corrected according to the real-time position and the preset standard distance, and forming a determination result; a drawing module, which is connected to the data acquisition module, the determination module and the judgment module respectively, and is used to draw a picture change curve according to the judgment result, the real-time facial clarity and the real-time position, and to draw a visibility change curve according to the judgment result, the real-time position and the regional visibility; A correction module is connected to the drawing module and is used to correct the preset display clarity according to the picture change curve and the visibility change curve to form an adjusted display clarity.

2. The interactive road sign system according to claim 1, characterized in that: The determination module comprises: An area deviation calculation unit, used to calculate the relative deviation between the real-time area and a preset standard area to form an area deviation; A diameter fluctuation calculation unit, used to calculate the standard deviation of the real-time average particle diameter to form a diameter fluctuation value; a fluctuation deviation calculation unit, connected to the diameter fluctuation calculation unit, for calculating the diameter fluctuation deviation according to the diameter fluctuation value; A weighted calculation unit is connected to the area deviation calculation unit and the fluctuation deviation calculation unit respectively, and is used to perform weighted summation according to a preset area weight, a preset diameter weight, the area deviation and the diameter fluctuation deviation to form regional visibility.

3. The interactive road sign system according to claim 2, characterized in that: The fluctuation deviation calculation unit comprises: A fluctuation comparison subunit, used to compare the diameter fluctuation value with a preset diameter fluctuation threshold value to form a fluctuation comparison result; The fluctuation deviation calculation subunit is connected to the fluctuation comparison subunit and is used to calculate the relative deviation between the diameter fluctuation value and the preset diameter fluctuation threshold value to form the diameter fluctuation deviation when the fluctuation comparison result shows that the diameter fluctuation value is greater than the preset diameter fluctuation threshold value.

4. The interactive road sign system according to claim 3, characterized in that: The adjustment module comprises: A visibility comparison unit, used to compare the visibility of the area with a preset standard visibility to form a visibility comparison result; An adjustment unit is connected to the visibility contrast and is used to adjust the preset contrast according to a preset adjustment coefficient and a relative deviation between the regional visibility and the preset standard visibility to form a temporary contrast when the visibility comparison result shows that the regional visibility is less than the preset standard visibility.

5. The interactive road sign system according to claim 4, characterized in that: The adjustment module comprises: A facial clarity comparison unit, used to compare the real-time facial clarity with a preset standard clarity to form a facial clarity comparison result; An adjustment unit is connected to the facial clarity contrast unit and is used to adjust the temporary contrast according to a relative deviation between the real-time facial clarity and the preset standard clarity and a preset adjustment coefficient to form an adjusted contrast when the real-time facial clarity contrast result shows that the facial clarity is less than the preset standard clarity.

6. The interactive road sign system according to claim 5, characterized in that: The determination module comprises: A position calculation unit, used to calculate the distance between the real-time position and the road sign to form a first distance; a position comparison unit connected to the position calculation unit and configured to compare the first distance with the preset standard distance to form a position comparison result; a recording unit connected to the position comparison unit, and configured to record a duration of the position comparison result when the position comparison result indicates that the first distance is smaller than the preset standard distance; A determination unit is connected to the recording unit and is used to determine whether the preset display clarity needs to be corrected according to a comparison result between the duration and a preset standard duration, so as to form a determination result.

7. The interactive road sign system according to claim 6, characterized in that: The drawing module comprises: A picture curve drawing unit, used for drawing a curve of the real-time facial definition based on the real-time position change to form a picture change curve when the determination result is that the duration is greater than a preset standard duration; The visibility curve drawing unit is used to draw a curve of the regional visibility based on the real-time position change to form a visibility change curve when the determination result is that the duration is greater than a preset standard duration.

8. The interactive road sign system according to claim 7, characterized in that: The correction module comprises: A consistency calculation unit, used for calculating the Pearson correlation coefficient of the picture change curve and the visibility change curve to form a change consistency; The correction unit is used to correct the preset display clarity according to the change consistency to form an adjusted display clarity.

9. The interactive road sign system according to claim 8, characterized in that: The correction unit comprises: A consistency comparison subunit, used to compare the change consistency with a preset standard consistency to form a consistency comparison result; A correction subunit is connected to the consistency comparison subunit and is used to correct the preset display clarity according to the relative deviation between the change consistency and the preset standard consistency and a preset correction coefficient when the consistency comparison result is that the change consistency is less than the preset standard consistency, so as to form an adjusted display clarity.

10. The interactive road sign system according to claim 9, characterized in that: The correction unit also includes: An adjustment fluctuation calculation subunit, connected to the correction subunit, for calculating the standard deviation of all the adjusted display definition quantities within a preset fluctuation adjustment time length to form an adjustment fluctuation value; The standard adjustment subunit is connected to the adjustment fluctuation calculation subunit and is used to adjust the preset standard consistency according to the relative deviation between the adjustment fluctuation value and the preset standard adjustment fluctuation value and the preset standard adjustment coefficient when the adjustment fluctuation value is greater than the preset standard adjustment fluctuation value.

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