A monitoring device and a control method, control apparatus, and storage medium thereof

Abstract

A monitoring device and a control method, a control device and a storage medium thereof, the monitoring device comprising: a light reduction structure, an imaging structure and a controller, wherein: the light reduction structure is configured to provide light reduction processing of different light reduction degrees on input external light according to the control of the controller, and to emit the light reduction processed external light to the imaging structure; the imaging structure is configured to image based on the incident light and output an imaging signal to the controller; and the controller is configured to generate an image according to the imaging signal and control the light reduction degree of the light reduction structure according to the image. The scheme provided in the embodiment provides a monitoring device capable of realizing multi-stage light reduction, adapting to different environmental light and improving monitoring effect.

Description

Technical Field

[0001] This article relates to monitoring technology, and in particular to a monitoring device and its control method, control device, and storage medium. Background Technology

[0002] With the rapid pace of urbanization, high-rise buildings are springing up all over the world, and more and more communities are building high-rise residential buildings. However, there are still people carelessly throwing objects from high-rise buildings, posing a huge safety hazard to pedestrians and their property. How to effectively monitor objects being thrown from buildings is an urgent problem to be solved.

[0003] Current high-rise building object-throwing surveillance solutions on the market are basically designed to be installed on the ground, monitoring the high-rise area from below. However, using conventional surveillance cameras presents problems such as poor image quality at night and the need for additional lighting to disturb residents; while using large-aperture cameras is limited by daylight conditions. Due to the influence of weather, time, geographical location, and season, the camera installation methods are highly limited, and differences in lighting conditions can significantly impact the monitoring effectiveness. Summary of the Invention

[0004] This application provides a monitoring device and its control method and control apparatus, which can improve the monitoring effect.

[0005] This application provides a monitoring device, including: a light-reducing structure, an imaging structure, and a controller, wherein:

[0006] The light reduction structure is configured to provide light reduction processing of different degrees to the input ambient light according to the control of the controller, and to output the light reduced ambient light to the imaging structure.

[0007] The imaging structure is configured to perform imaging based on incident light and output an imaging signal to the controller;

[0008] The controller is configured to generate an image based on the imaging signal and control the degree of light reduction of the light-reducing structure based on the image.

[0009] In an exemplary embodiment, the light reduction structure includes a plurality of light reduction units and a light reduction control driving module, wherein the plurality of light reduction units are cascaded, wherein:

[0010] The light reduction control drive module is configured to enable or de-enable the light reduction unit according to the control of the controller;

[0011] The light reduction unit is configured such that, when enabled by the light reduction control driving module, it reduces the incident light to the transmittance of the light reduction unit before extruding it to the subsequent structure; and when deenabled by the light reduction control driving module, it allows the incident light to be completely transmitted to the subsequent structure, which is either a subsequent light reduction unit of the light reduction unit or the imaging structure.

[0012] In one exemplary embodiment, the transmittance of the plurality of light-reducing units is different.

[0013] In an exemplary embodiment, the controller controls the light reduction structure to reduce the light level based on the image, including: in response to the average brightness of the image being greater than a preset maximum brightness threshold and the light reduction structure not reaching the maximum light reduction level, controlling the light reduction structure to increase the light reduction level; and in response to the average brightness of the image being less than a preset minimum brightness threshold and the light reduction structure not reaching the minimum light reduction level, controlling the light reduction structure to decrease the light reduction level.

[0014] In an exemplary embodiment, the controller controls the light reduction degree of the light reduction structure according to the image, including: reducing the shutter speed in response to the average brightness of the image being greater than a preset maximum brightness threshold and the light reduction structure reaching the maximum light reduction degree; and increasing the shutter speed in response to the average brightness of the image being less than a preset minimum brightness threshold and the light reduction structure reaching the minimum light reduction degree.

[0015] This disclosure provides a monitoring device control method, applied to the aforementioned monitoring device, including:

[0016] An image is acquired, and the degree of light reduction of the light-reducing structure is controlled based on the image.

[0017] In an exemplary embodiment, controlling the degree of light reduction of the light-reducing structure based on the image includes:

[0018] When the average brightness of the image is greater than the preset maximum brightness threshold and the light reduction structure has not reached the maximum light reduction degree, the light reduction structure is controlled to increase the light reduction degree.

[0019] When the average brightness of the image is less than a preset minimum brightness threshold and the light reduction structure has not reached the minimum light reduction level, the light reduction structure is controlled to reduce the light reduction level.

[0020] In an exemplary embodiment, the light reduction degree of the light reduction structure includes multiple light reduction levels, and controlling the light reduction structure to increase the light reduction degree or control the light reduction structure to decrease the light reduction degree includes: controlling the light reduction structure to increase the light reduction level by one level or controlling the light reduction structure to decrease the light reduction level by one level.

[0021] In an exemplary embodiment, controlling the degree of light reduction of the light-reducing structure based on the image further includes:

[0022] When the average brightness of the image is greater than a preset maximum brightness threshold and the light reduction structure reaches its maximum light reduction level, reduce the shutter speed.

[0023] When the average brightness of the image is less than a preset minimum brightness threshold and the light reduction structure reaches the minimum light reduction level, the shutter speed is increased.

[0024] In one exemplary embodiment, the method further includes the image including a weighted region, wherein the brightness of the weighted region meets a preset monitoring requirement.

[0025] This disclosure provides a monitoring device control apparatus, including a memory and a processor. The memory stores a program, which, when read and executed by the processor, implements the monitoring device control method described in any of the above embodiments.

[0026] This disclosure provides a computer-readable storage medium storing one or more programs that can be executed by one or more processors to implement the monitoring device control method described in any of the above embodiments.

[0027] Compared with related technologies, this application embodiment includes a monitoring device and its control method, control apparatus, and storage medium. The monitoring device includes a light-reducing structure, an imaging structure, and a controller. The light-reducing structure is configured to provide light reduction processing of input ambient light to different degrees according to the control of the controller, and to output the light-reduced ambient light to the imaging structure. The imaging structure is configured to perform imaging based on the incident light and output an imaging signal to the controller. The controller is configured to generate an image based on the imaging signal and control the light reduction degree of the light-reducing structure based on the image. The solution provided in this embodiment offers a monitoring device capable of multi-level light reduction, adapting to different ambient light conditions and improving monitoring effectiveness.

[0028] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0030] Figure 1 A block diagram of a monitoring device provided as an exemplary embodiment;

[0031] Figure 2 A schematic diagram of a light reduction control drive module provided for an exemplary embodiment;

[0032] Figure 3 A flowchart of a monitoring device control method provided as an exemplary embodiment;

[0033] Figure 4 A schematic diagram of the weight region provided for an exemplary embodiment;

[0034] Figure 5 A flowchart of a monitoring device control method provided as an exemplary embodiment;

[0035] Figure 6 A schematic diagram of a monitoring equipment control device provided as an exemplary embodiment;

[0036] Figure 7 A schematic diagram of a computer-readable storage medium provided for an exemplary embodiment. Detailed Implementation

[0037] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0038] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0039] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0040] This disclosure provides a monitoring device equipped with a light-reducing structure capable of providing different levels of light reduction to cope with different ambient lighting conditions.

[0041] Figure 1 A block diagram of a monitoring device provided in an embodiment of this disclosure. Figure 1 As shown, this disclosure provides a monitoring device, including: a light-reducing structure, an imaging structure, and a controller, wherein:

[0042] The light reduction structure is configured to provide light reduction processing of different degrees to the input ambient light according to the control of the controller, and to output the light reduced ambient light to the imaging structure.

[0043] The imaging structure is configured to perform imaging based on incident light and output an imaging signal to the controller;

[0044] The controller is configured to generate an image based on the imaging signal and control the degree of light reduction of the light-reducing structure based on the image.

[0045] The monitoring device provided in this embodiment features a light-reducing structure that can reduce ambient light to varying degrees to adapt to different lighting conditions and improve image quality. Furthermore, the light-reducing structure is located outside the imaging structure, reducing coupling to subsequent optical modules, allowing it to adapt to different lenses and meet the needs of a wider range of lighting environments.

[0046] In one exemplary embodiment, the controller may be implemented using a DSP (Digital Signal Processing) processor or other processors.

[0047] In an exemplary embodiment, the light reduction structure may include a plurality of light reduction units and a light reduction control driving module, wherein the plurality of light reduction units are cascaded, wherein:

[0048] The light reduction control drive module is configured to enable or de-enable the light reduction unit according to the control of the controller;

[0049] The light reduction unit is configured such that, when enabled by the light reduction control driving module, it reduces the incident light to the transmittance of the light reduction unit before extruding it to the subsequent structure; and when deenabled by the light reduction control driving module, it allows the incident light to be completely transmitted to the subsequent structure, which is either a subsequent light reduction unit of the light reduction unit or the imaging structure.

[0050] In this embodiment, the light reduction structure uses multiple light reduction units, which are replaceable and controllable.

[0051] In one exemplary embodiment, the light reduction unit is, for example, a light reduction mirror, which is, for example, an ND (Neutral Density) filter, but the embodiments disclosed herein are not limited thereto.

[0052] In one exemplary embodiment, the light-reducing structure may include two light-reducing units. For example... Figure 1 As shown, the light reduction structure includes a primary light reduction unit and a secondary light reduction unit. External light is incident on the primary light reduction unit and, after processing by the primary light reduction unit (the transmittance of the primary light reduction unit is λ when enabled),... a When the light is fully transmitted (when enabled), the light is output to the secondary light-reducing unit. After light reduction processing by the secondary light-reducing unit (the transmittance of the secondary light-reducing unit is λ when enabled), the light is emitted. b (When enabled, it is completely transparent), λ a ≠λ b This allows for four levels of light reduction adjustment, with transmittance increasing from smallest to largest as follows: (λ...) a *λ b , λ b , λ a ,1)(Assume 1>λ a >λ b >0, the same below).

[0053] In an exemplary embodiment, the transmittance of the first light-reducing unit and the second light-reducing unit can be the same, i.e., λ. a =λ b At this point, three levels of light reduction can be achieved (λ). a *λ b , λ b or λ a 1). Using light reduction units with different transmittance can increase the light reduction level.

[0054] In another exemplary embodiment, more stages of light reduction units can be provided. For example, it can include a first-stage light reduction unit, a second-stage light reduction unit, and a third-stage light reduction unit cascaded in sequence, wherein the transmittance λ of the first-stage light reduction unit is... a The transmittance λ of the secondary light-reducing unit b The transmittance λ of the third-level light-reducing unitc , and λ a ≠λ b ≠λ c , 1 > λ a >λ b >λ c If the transmittance is greater than 0, then eight levels of light reduction can be achieved, with the transmittance from smallest to largest being (λ) a *λ b *λ c , λ b *λ c , λ a *λ c , λ a *λ b , λ c , λ b , λ a ,1).

[0055] Figure 2 This is a schematic diagram of a light reduction control driving module provided for an exemplary embodiment. In this embodiment, the light reduction unit may include two units. Figure 2 As shown, the dimming control driving module provided in this embodiment may include a driving chip U1 and a connector J1. The driving chip U1 includes pins 1 to 8, wherein:

[0056] Pin 1 (power supply VCC) of the driver chip U1 is connected to the voltage terminal VDD, and the voltage of the voltage terminal VDD is, for example, 5V. A capacitor C1 is connected between pin 1 and the ground terminal GND. Pin 3 (first ground terminal GND1) and pin 7 (second ground terminal GND2) are connected to the ground terminal GND. Pin 8 (first input terminal AIN) is connected to the controller and receives the first control signal from the controller to the first dimming unit. Pin 5 (second input terminal BIN) is connected to the controller and receives the second control signal from the controller to the second dimming unit. Pin 4 (first output terminal AOUT) is connected to connector J1 and is connected to the motor driving the first dimming unit through connector J1. Pin 2 (second output terminal BOUT) is connected to connector J1 and is connected to the motor driving the second dimming unit through connector J1. Pin 6 (NC terminal) is left floating.

[0057] In an exemplary embodiment, connector J1 may be omitted, i.e., pin 4 (first output terminal AOUT) may be directly connected to the motor driving the first dimming unit, and pin 2 (second output terminal BOUT) may be directly connected to the motor driving the second dimming unit.

[0058] The driving chip in the above embodiments is only an example. You can select the appropriate driving chip as needed, or you can build a related driving circuit to drive the light reduction unit.

[0059] The controller can output a first enable control signal to the first input terminal AIN, and the dimming control drive module outputs an enable signal to the motor driving the first dimming unit through the first input terminal AOUT, thereby enabling the first dimming unit; alternatively, the controller can output a first de-enable control signal to the first input terminal AIN, and the dimming control drive module outputs a de-enable signal to the motor driving the first dimming unit through the first input terminal AOUT, thereby de-enableing the first dimming unit. The enabling and de-enableing of the second dimming unit is similar and will not be described again. The above embodiments only use two dimming units as an example. However, the embodiments of this disclosure are not limited to this; when multiple dimming units exist, the drive control signal and drive motor can be increased accordingly.

[0060] In one exemplary embodiment, during the startup process of the monitoring device, the controller can control the dimming control drive module to perform a self-test and record the dimming unit status (enabled or disabled).

[0061] In an exemplary embodiment, the light reduction structure may include two polarizers and a driving structure for driving the polarizers. Changing the angle of the two polarizers can change the transmittance. In this embodiment, the transmittance can be continuously changed, or multiple light reduction levels can be set, each corresponding to the angle of the corresponding polarizer. When adjusting the angle of the polarizer, one light reduction level can be adjusted at a time.

[0062] The solution provided in this embodiment does not place the neutral density filter in the optical path of the "lens-image sensor", which increases the space available for the neutral density filter, allows multiple sets to be placed, and reduces the coupling to subsequent optical modules, allowing for free coverage of lens group selection.

[0063] In one exemplary embodiment, the imaging structure may include a lens structure, a lens control unit, and an image sensor. The lens control unit and the image sensor are connected to a controller. The lens structure may include one or more lenses. The lens control unit drives the lens structure according to the control of the controller. The lens structure transmits incident light to the image sensor. The image sensor generates an imaging signal based on the incident light, and the imaging signal is output to the controller. The image sensor may include a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS), etc.

[0064] In one exemplary embodiment, the controller may include an image preprocessing module and an image recognition and detection module. The image preprocessing module may perform processing on the image, such as filtering, and the image recognition and detection module may perform brightness detection, target detection, and so on.

[0065] Figure 3This is a flowchart of a monitoring equipment control method provided in an embodiment of this disclosure. Figure 3 As shown, this disclosure provides a monitoring device control method, applied to the aforementioned monitoring device, including:

[0066] Step 301, acquire the image;

[0067] Step 302: Control the degree of light reduction of the light-reducing structure according to the image.

[0068] In one exemplary embodiment, the image includes a weighted region, the brightness of which meets preset monitoring requirements. During monitoring, users typically set a Region of Interest (ROI), and the weighted region can be determined based on the ROI. The weighted region may include all or part of the ROI. When the monitoring device performs monitoring, it adjusts its parameters to ensure the brightness L of the weighted region is within a certain range. r To meet preset monitoring requirements, such as ensuring the average brightness L of the weighted region. r Located within the preset brightness threshold range (L) rmin L rmax This ensures a clear and reliable image. There are many ways to calculate image brightness. For example, it can be calculated using the RGB conversion formula: Brightness = 0.299*R + 0.587*G + 0.114*B. However, this embodiment is not limited to this, and other methods can be used to calculate brightness. In another embodiment, the preset monitoring requirements can be other specifications.

[0069] In an exemplary embodiment, controlling the degree of light reduction of the light-reducing structure based on the image includes:

[0070] When the average brightness of the image is greater than the preset maximum brightness threshold L fh Furthermore, if the light reduction structure has not reached its maximum light reduction level, the light reduction structure is controlled to increase the light reduction level; wherein, the average brightness of the image is the average brightness L of the entire image. f Also known as global average brightness;

[0071] When the average brightness of the image is less than the preset minimum brightness threshold L fl Furthermore, if the light reduction structure does not reach the minimum light reduction level, the light reduction structure is controlled to reduce the light reduction level.

[0072] The solution provided in this embodiment, when adjusting the imaging structure to meet the brightness requirements of the weighted region, if the global image brightness L... f It no longer meets the switching threshold (L) fl L fh When the image structure is no longer suitable for further adjustment, the adjustment of the dimming unit is triggered.

[0073] When L f Greater than L fh When the scene is deemed too bright, it is checked whether a dimming unit can remain enabled to further reduce the brightness; when L f Below L fl If the scene is deemed too dark, the system checks whether a dimming unit can be enabled to increase light intake. The current state of the dimming unit is recorded and determined by the controller, and the enabling / disabling of the dimming unit is controlled by the controller.

[0074] The light reduction degree can be continuously varied, or it can be divided into multiple levels. In an exemplary embodiment, the light reduction degree of the light reduction structure includes multiple light reduction levels, and controlling the light reduction structure to increase or decrease the light reduction degree includes: controlling the light reduction structure to increase by one level or controlling the light reduction structure to decrease by one level. That is, the light reduction degree of the light reduction structure is changed step by step.

[0075] In an exemplary embodiment, controlling the degree of light reduction of the light-reducing structure based on the brightness of the image further includes:

[0076] When the average brightness of the image is greater than a preset maximum brightness threshold and the light reduction structure reaches its maximum light reduction level, reduce the shutter speed.

[0077] When the average brightness of the image is less than a preset minimum brightness threshold and the light reduction structure reaches the minimum light reduction level, the shutter speed is increased.

[0078] In an exemplary embodiment, the shutter speed can be increased or decreased in stages, that is, the shutter speed is divided into multiple stages, and one stage of shutter speed is increased or decreased at a time.

[0079] In one exemplary embodiment, the preset maximum brightness threshold and the preset minimum brightness threshold are the maximum brightness threshold and minimum brightness threshold corresponding to the current scene. That is, multiple scenes can be preset, and corresponding preset maximum brightness thresholds and preset minimum brightness thresholds can be set for each scene. For example, in the Northern Hemisphere, if the camera is installed on the sunny side of a high-rise building, the camera faces north, its field of view is directly illuminated, and based on the elevation angle assessment, the probability of it being directly exposed to sunlight is relatively small, so relatively small maximum brightness thresholds and minimum brightness thresholds can be set. Conversely, if the camera is installed on the shady side of a high-rise building, it faces south and is easily affected by direct sunlight, so relatively large maximum brightness thresholds and minimum brightness thresholds can be preset.

[0080] Figure 5 A flowchart illustrating a monitoring device control method as provided in an exemplary embodiment. Figure 5 As shown, the monitoring equipment control method provided in this implementation includes:

[0081] Step 501, acquire the image;

[0082] Step 502: Determine the brightness L of the weighted region of the image. r Adjust the parameters of the imaging structure of the monitoring device to make the brightness L of the weighted region of the image... r Located within the preset brightness threshold range (L) rmin L rmax This means ensuring that the image in the weighted region meets the monitoring requirements;

[0083] Step 503: Obtain the global average brightness L of the image. f ;

[0084] Step 504, adjust the global average brightness L f With the preset maximum brightness threshold L fh and preset minimum brightness threshold L fl When comparing, when L fl ≤L f ≤L fh When L... f >L fh When L indicates that the scene is too bright, step 505 is executed; f <L fl If the scene is too dark, proceed to step 510.

[0085] Step 505: Determine whether all dimming units are turned on (i.e., all enabled); if all are turned on, it means that further dimming is not possible, proceed to step 508; if not all are turned on, proceed to step 506.

[0086] Step 506: Adjust the light reduction structure to increase the light reduction level by one step, that is, reduce the amount of light entering the camera;

[0087] Step 507, increase exposure compensation, then proceed to step 515;

[0088] As the light reduction level changes, the exposure compensation value should be adjusted accordingly.

[0089] Step 508: Reduce the shutter speed. The shutter speed should be greater than or equal to the shortest exposure time. The shutter speed can be divided into multiple levels, and the shutter speed can be reduced sequentially according to the levels until the brightness of the weighted area of ​​the image is within the preset brightness threshold range (L). rmin L rmax ); Execute step 509;

[0090] Step 509, Modify the preset minimum brightness threshold L fl This can increase the preset minimum brightness threshold L. fl To meet the requirements of a brighter scene, proceed to step 516;

[0091] Step 510: Determine whether all light reduction units are turned off (i.e., all are disabled); if they are all turned off, it means that the light intake cannot be further increased, and proceed to step 513; if they are not all turned off, proceed to step 511.

[0092] Step 511: Adjust the light reduction structure to reduce the light reduction level by one level, that is, increase the amount of light entering the camera;

[0093] Step 512, reduce exposure compensation; proceed to step 515;

[0094] As the light reduction level changes, the exposure compensation value should be adjusted accordingly.

[0095] Step 513, increase the shutter speed; the shutter speed should be less than or equal to the longest exposure time; the shutter speed can be divided into multiple levels, and the shutter speed can be increased sequentially according to the levels until the brightness of the weighted area of ​​the image meets the preset brightness threshold range (L). rmin L rmax );

[0096] Step 514, modify the preset maximum brightness threshold L fh This can reduce the preset maximum brightness threshold L. fh To suit darker scenes, proceed to step 516;

[0097] Step 515: Readjust the imaging structure parameters so that the brightness of the weighted region of the image is within the preset brightness threshold range, and then proceed to step 503.

[0098] Step 516: Wait for the global image brightness change to re-trigger the dimming control, then end;

[0099] Step 517: No light reduction control is required. End.

[0100] The following description uses an example with two light-reducing units: neutral density filter A and neutral density filter B, to further illustrate the light-reducing control process of this embodiment. In this embodiment, the transmittance of neutral density filter A is greater than that of neutral density filter B.

[0101] In an exemplary embodiment, in L f Greater than L fh When this occurs, it determines whether a light reduction unit is enabled, and adjusts the light reduction level step by step from the current level to the highest level, including:

[0102] If the current light reduction level is the lowest light reduction level, that is, neither light reduction filter A nor light reduction filter B is enabled, then light reduction filter A is enabled;

[0103] If neutral density filter A is currently enabled, then enable neutral density filter B and de-enable neutral density filter A;

[0104] If neutral density filter B is currently enabled and neutral density filter A is not enabled, then neutral density filter B remains enabled, and neutral density filter A is enabled to achieve the highest light reduction level, that is, to achieve the maximum light reduction effect.

[0105] After each dimming adjustment (increasing the dimming level by one step), the built-in parameters of the monitoring equipment (image processing parameters and imaging structure parameters) are adjusted to ensure that the weighted area meets the monitoring requirements (the brightness of the weighted area is within the preset brightness threshold range), and the global brightness L of the image is determined. f Is it greater than L? fh If less than or equal to L fh Then the dimming adjustment ends. If it is greater than L... fh Then continue to adjust the light reduction as described above;

[0106] In addition, when adjusting for light reduction, increasing the light reduction level by one level will correspondingly adjust the exposure strategy. Here, this is to increase exposure compensation, and the exposure strategy will also be adjusted step by step.

[0107] If neutral density filter A and mirror filter B are fully enabled, i.e., when the minimum light intake is met, L f Still greater than L fh You can then gradually reduce the shutter speed until you reach the maximum shutter speed.

[0108] The solution provided in this embodiment adjusts the light reduction level while ensuring that the weighted area meets the monitoring requirements, which can provide higher image quality and improve the monitoring effect. However, this embodiment is not limited to this. The light reduction level can be adjusted according to the ambient light level. For example, the configuration parameters of the monitoring device are preset parameters. The image is acquired under these parameters, the ambient light level is determined according to the brightness of the image, and the light reduction level is adjusted according to the ambient light level, and so on.

[0109] In one exemplary embodiment, in L f Less than L fl When this happens, it determines whether there is a light-reducing unit that can be enabled, and adjusts the light reduction level step by step from the current level to the lowest level (i.e., full light transmission), including:

[0110] If both neutral density filter A and neutral density filter B are currently enabled, then disable neutral density filter B and keep neutral density filter A enabled.

[0111] If neutral density filter A is currently enabled and neutral density filter B is deenabled, then neutral density filter A is deenabled and neutral density filter B is enabled.

[0112] If neutral density filter A is currently disabled and neutral density filter B is enabled, then neutral density filter A will remain disabled and neutral density filter B will be disabled to achieve the lowest light reduction level, which is to achieve the maximum light intake effect.

[0113] After each dimming adjustment (here, a reduction of one dimming level), the monitoring equipment parameters (image processing parameters and imaging structure parameters) are adjusted to ensure that the weighted area meets the monitoring requirements (the brightness of the weighted area is within the preset brightness threshold range), and the global brightness L of the image is determined. f Is it less than L? fl If greater than or equal to L fl Then the dimming adjustment ends. If it is less than L... fl Then continue to adjust the light reduction as described above;

[0114] When neutral density filters A and B are fully deactivated, i.e., when the maximum light intake is satisfied, if L f Still less than L fl Then, the shutter speed can be gradually increased (slow shutter speed) until the upper limit of the shutter speed is reached. In this embodiment, the image brightness can be increased by increasing the shutter speed. The purpose of monitoring is to capture continuous images at a faster frame rate. In this embodiment, the shutter speed is adjusted only after the amount of light entering the camera cannot be increased, which can enhance the monitoring effect.

[0115] The solution provided in this embodiment can be used in high-rise building monitoring scenarios to solve the problem of overexposure / underexposure of the camera image caused by light effects, and has practical application value. It can reduce the light of the device in stages according to the changes in the ambient light, so as to ensure that the appropriate light reduction strategy can be selected under different lighting conditions, making it more universally applicable to various scenarios.

[0116] like Figure 6 As shown, this embodiment of the present disclosure provides a monitoring device control apparatus, including a memory 610 and a processor 620. The memory 610 stores a program, which, when read and executed by the processor 620, implements the monitoring device control method described in any of the above embodiments.

[0117] like Figure 7 As shown, this disclosure provides a computer-readable storage medium 70 that stores one or more programs 80, which can be executed by one or more processors to implement the monitoring device control method described in any of the above embodiments.

[0118] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

1. A monitoring device, characterized in that, include: The light-reducing structure, the imaging structure, and the controller, wherein: The light reduction structure is configured to provide light reduction processing of different degrees to the input ambient light according to the control of the controller, and to output the light reduced ambient light to the imaging structure. The imaging structure includes a lens structure, a lens control unit, and an image sensor. The lens control unit and the image sensor are connected to the controller. The lens structure includes one or more lenses. The lens control unit drives the lens structure according to the control of the controller. The lens structure transmits incident light to the image sensor. The image sensor generates an imaging signal based on the incident light and outputs the imaging signal to the controller. The controller is configured to generate an image based on the imaging signal and control the degree of light reduction of the light-reducing structure based on the image; The light reduction structure includes multiple cascaded light reduction units and a light reduction control and drive module, and the light reduction structure is disposed outside the imaging structure; The light reduction control drive module is configured to enable or de-enable the light reduction unit according to the control of the controller; The light reduction unit is configured such that, when enabled by the light reduction control driving module, it reduces the incident light to the transmittance of the light reduction unit before extruding it to the subsequent structure; and when deenabled by the light reduction control driving module, it allows the incident light to be completely transmitted to the subsequent structure, which is either a subsequent light reduction unit of the light reduction unit or the imaging structure.

2. The monitoring equipment according to claim 1, characterized in that, The transmittance of the multiple light-reducing units is different.

3. The monitoring device according to any one of claims 1 to 2, characterized in that, The controller controls the light reduction structure to increase the light reduction degree based on the image, including: in response to the average brightness of the image being greater than a preset maximum brightness threshold and the light reduction structure not reaching the maximum light reduction degree, controlling the light reduction structure to increase the light reduction degree; and in response to the average brightness of the image being less than a preset minimum brightness threshold and the light reduction structure not reaching the minimum light reduction degree, controlling the light reduction structure to decrease the light reduction degree.

4. The monitoring device according to claim 3, characterized in that, The controller controls the light reduction degree of the light reduction structure according to the image, including: reducing the shutter speed in response to the average brightness of the image being greater than a preset maximum brightness threshold and the light reduction structure reaching the maximum light reduction degree; and increasing the shutter speed in response to the average brightness of the image being less than a preset minimum brightness threshold and the light reduction structure reaching the minimum light reduction degree.

5. A method for controlling monitoring equipment, characterized in that, Applied to the monitoring device as described in any one of claims 1 to 4, comprising: An image is acquired, and the degree of light reduction of the light-reducing structure is controlled based on the image.

6. The monitoring equipment control method according to claim 5, characterized in that, Controlling the degree of light reduction of the light-reducing structure based on the image includes: When the average brightness of the image is greater than the preset maximum brightness threshold and the light reduction structure has not reached the maximum light reduction degree, the light reduction structure is controlled to increase the light reduction degree. When the average brightness of the image is less than a preset minimum brightness threshold and the light reduction structure has not reached the minimum light reduction level, the light reduction structure is controlled to reduce the light reduction level.

7. The monitoring equipment control method according to claim 6, characterized in that, The light reduction degree of the light reduction structure includes multiple light reduction levels. Controlling the light reduction structure to increase the light reduction degree or control the light reduction structure to decrease the light reduction degree includes: controlling the light reduction structure to increase the light reduction level by one level or controlling the light reduction structure to decrease the light reduction level by one level.

8. The monitoring equipment control method according to claim 6, characterized in that, The control of the light reduction degree of the light reduction structure based on the image further includes: When the average brightness of the image is greater than a preset maximum brightness threshold and the light reduction structure reaches its maximum light reduction level, reduce the shutter speed. When the average brightness of the image is less than a preset minimum brightness threshold and the light reduction structure reaches the minimum light reduction level, the shutter speed is increased.

9. The monitoring equipment control method according to any one of claims 5 to 8, characterized in that, The method further includes the image comprising a weighted region, wherein the brightness of the weighted region meets preset monitoring requirements.

10. A monitoring equipment control device, characterized in that, It includes a memory and a processor, wherein the memory stores a program, and when the program is read and executed by the processor, it implements the monitoring device control method as described in any one of claims 5 to 9.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores one or more programs, which can be executed by one or more processors to implement the monitoring device control method as described in any one of claims 5 to 9.

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