Preview screen display method, construction device and computer readable storage medium

Abstract

The present application discloses a display method, a construction device and a computer-readable storage medium for a preview screen, the display method comprising: obtaining a target motion flow direction of a target object; according to the target motion flow direction, simultaneously displaying the preview screen in multiple preview panes on a monitoring interface; wherein the preview screens displayed in different preview panes are shot in real time by different target cameras, and the multiple preview panes include a target pane group corresponding to the target motion flow direction, the target pane group includes multiple preview panes arranged in sequence along the target direction, and when the target object moves according to the target motion flow direction, the target object appears in the preview screens in the multiple preview panes arranged in sequence along the target direction. The display method of the present application can facilitate monitoring personnel to monitor the flowing target object, conform to the monitoring habits of monitoring personnel, and improve the monitoring effect.

Description

Technical Field

[0001] The present application relates to the field of video processing technology, and in particular to a display method, a construction device and a computer-readable storage medium for a preview screen. Background Art

[0002] In the prior art, when multiple cameras need to be added to a video surveillance system, they are generally added by one-click, and after the addition is completed, the channel of the camera is fixed. At the same time, when preview images shot by multiple cameras are displayed on the monitoring interface, the arrangement order of the preview images is random, such as Figure 1 As shown, it is assumed that the target object often passes by the cameras corresponding to preview images 1, 24 and 47 in succession. However, for the monitoring personnel, when they need to continuously monitor the target object, they need to first summarize the movement patterns of the target object, and then search for preview images 1, 24 and 47 respectively. In this process, the user needs to summarize and search, which is cumbersome and inefficient, and is not conducive to monitoring by the monitoring personnel. Summary of the invention

[0003] The present application provides a display method, a construction device and a computer-readable storage medium for a preview screen, which can facilitate monitoring personnel to monitor mobile target objects, conform to the monitoring habits of monitoring personnel, and improve the monitoring effect.

[0004] A first aspect of an embodiment of the present application provides a method for displaying a preview screen, the method comprising: obtaining a target motion direction of a target object; and displaying the preview screen simultaneously in a plurality of preview panes on a monitoring interface according to the target motion direction; wherein the preview screens displayed in different preview panes are shot in real time by different target cameras, and the plurality of preview panes include a target pane group corresponding to the target motion direction, the target pane group includes a plurality of preview panes arranged in sequence along the target direction, and when the target object moves according to the target motion direction, the target object appears in sequence in the preview screens in the plurality of preview panes arranged along the target direction.

[0005] A second aspect of an embodiment of the present application provides a construction device, which includes a processor, a memory, and a communication circuit, wherein the processor is coupled to the memory and the communication circuit, respectively, and program data is stored in the memory. The processor implements the steps in the above method by executing the program data in the memory.

[0006] A third aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program can be executed by a processor to implement the steps in the above method.

[0007] The beneficial effect is: the present application simultaneously displays preview images in multiple preview panes on the monitoring interface according to the target movement direction of the target object, and arranges the preview panes in the target pane group in sequence along the target direction, so that when the target object moves according to the target movement direction, the target object appears in sequence in the preview images in the multiple preview panes arranged along the target direction, so that when the monitoring personnel observe the flow of the target object, they can intuitively and coherently determine the flow of the target object from the monitoring interface, which is more in line with the monitoring habits of the monitoring personnel and can also improve the monitoring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0009] Figure 1 It is a schematic diagram of a monitoring interface in the prior art;

[0010] Figure 2 It is a flowchart of an implementation method of a preview interface display method of the present application;

[0011] Figure 3 It is a schematic diagram of the communication connection between the construction device and the target camera in an application scenario of the present application;

[0012] Figure 4 It is a schematic diagram of the communication connection between the construction device and the target camera in another application scenario of the present application;

[0013] Figure 5 It is a schematic diagram of the arrangement of multiple preview panes in the monitoring interface;

[0014] Figure 6 yes Figure 2 Another partial flow chart of the display method in the embodiment;

[0015] Figure 7 It is a schematic diagram of the target movement flow direction of the target object;

[0016] Figure 8 is based on Figure 7 The established topology map;

[0017] Fig. 9 It is an application scenario corresponding to Figure 7 Monitoring interface diagram;

[0018] Fig.10 It is another application scenario corresponding to Figure 7Monitoring interface diagram;

[0019] Fig.11 This is a monitoring interface diagram in another application scenario;

[0020] Fig.12 It is a structural schematic diagram of an embodiment of the construction device of the present application;

[0021] Fig.13 It is a structural schematic diagram of another embodiment of the construction device of the present application;

[0022] Fig.14 It is a structural schematic diagram of an implementation method of a computer-readable storage medium of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] It should be noted that the terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] See also Figure 2 , Figure 2 1 is a flow chart of an implementation method of a preview screen display method of the present application, the method comprising:

[0026] S110: Acquire the target motion direction of the target object.

[0027] S120: According to the target movement direction, the preview images are simultaneously displayed in multiple preview panes on the monitoring interface.

[0028] Among them, the preview images displayed in different preview panes are shot in real time by different target cameras, and the multiple preview panes include a target pane group corresponding to the target motion direction, the target pane group includes a plurality of preview panes arranged in sequence along the target direction, and when the target object moves according to the target motion direction, the target object appears in the preview images in the plurality of preview panes arranged along the target direction in sequence.

[0029] Combination Figure 3 and Figure 4 The method of the present application is performed by the construction device 100. Figure 3 In the application scenario, the construction device 100 is specifically a front-end management device such as an NVR (Network Video Recorder) or a VMS (Video Management System), and is connected to a display (not shown). When the construction device 100 receives video data shot by multiple target cameras through wired or wireless means (such as network communication), the video data shot by the multiple target cameras is displayed in real time on the monitoring interface of the display in the form of a preview screen according to the method of the present application; Figure 4 In the application scenario, the construction device 100 is a mobile client 100 such as a mobile phone, which has a display function. When the construction device 100 receives video data shot by multiple target cameras through the cloud, the video data shot by multiple target cameras is displayed in real time in the form of a preview screen according to the method of the present application.

[0030] At the same time, the target cameras in the present application are all able to send the captured video data to the construction device 100 in real time. Specifically, after the installers have installed the target cameras in various locations, they establish a communication connection between each target camera and the construction device 100, that is, add each target camera. After the addition is completed, the communication channel between the target camera and the construction device 100 is fixed, that is, the target camera sends the captured video data to the construction device 100 through the fixed communication channel.

[0031] Combination Figure 5 , multiple preview panes (indicated by label A) are displayed on the monitoring interface, each preview pane displays a preview image captured by a target camera in real time, and different preview panes display preview images captured by different target cameras in real time. In other words, the target camera displays the real-time captured image in the corresponding preview pane.

[0032] In this embodiment, for the convenience of description, each preview pane is represented by the label of the corresponding target camera. Figure 5In the figure, preview pane 1 displays the picture taken by target camera 1, preview pane 15 displays the picture taken by target camera 15, and so on. The preview picture displayed in preview pane 1 is defined as preview picture 1, the preview picture displayed in preview pane 2 is defined as preview picture 2, and so on.

[0033] The target object may be any object such as a person, a motor vehicle or a non-motor vehicle, and is not limited here. At the same time, the target object is predetermined and selected. When it is necessary to monitor the flow of people, the target object can be set to a person; when it is necessary to monitor the flow of motor vehicles, the target object can be set to a motor vehicle; when it is necessary to monitor the flow direction of a specific person, the target object can be set to the specific person.

[0034] At the same time, the target motion flow direction is the direction in which the target object is likely to move, that is, the target object will move along the target motion flow direction in most cases. The target motion flow direction of the target object is predetermined. In one application scenario, the target motion flow direction of the target object is manually summarized, for example, by a monitoring person, and then saved in the construction device 100. In another application scenario, in order to reduce the tediousness of manual summary and reduce the mistakes of manual summary, the target motion flow direction of the target object is determined in advance by analyzing the video data, and then the target motion flow direction is saved in the construction device 100. Figure 6 At this time, determining the target motion flow direction of the target object includes:

[0035] S130: Pre-acquire video data collected by multiple target cameras.

[0036] S140: Determine the target motion direction of the target object according to the video data.

[0037] Specifically, the video data collected by all target cameras is obtained. There may be multiple objects in the video data collected by the target cameras. When analyzing each object, the characteristics of each object are recorded: if the object is a person, the face, clothing, gait and other characteristics of the person are recorded, so that the movement direction of the same person can be analyzed based on the characteristics later. If the object is a motor vehicle, the body color, license plate number and other characteristics of the motor vehicle can be recorded, so that the movement direction of the same motor vehicle can be analyzed based on the characteristics later.

[0038] At the same time, objects can be classified according to parameters such as the object's movement speed. For example, according to the movement speed, objects can be divided into three types of target objects: motor vehicles, non-motor vehicles and people. Thus, for motor vehicles, the target movement direction of motor vehicles can be analyzed based on the movement conditions of all motor vehicles. For non-motor vehicles, the target movement direction of non-motor vehicles can be analyzed based on the movement conditions of all non-motor vehicles. According to the movement conditions of all people, the target movement direction of people can be analyzed.

[0039] After analyzing the video data, if it is determined that more than a preset ratio of motor vehicles are moving in the same flow direction, then the flow direction is determined as the target flow direction of the motor vehicles; if it is determined that more than a preset ratio of people are moving in the same flow direction, then the flow direction is determined as the target flow direction of people, and so on. The preset ratio can be 70%, 80% or 90%, etc., which is not limited here.

[0040] Among them, it is also possible to analyze a certain person or a certain car based on the video data collected by the target camera to obtain the target movement flow of the person or the car.

[0041] In this implementation, step S140 specifically includes:

[0042] S141: Determine, based on the video data, the area and time at which the target object leaves the shooting field of view of each target camera, and the area and time at which the target object enters the shooting field of view of each target camera.

[0043] S142: Determine the target movement direction of the target object according to the area and time when the target object leaves the shooting field of view of each target camera and the area and time when the target object enters the shooting field of view of each target camera.

[0044] Specifically, based on the analysis of the video data, the area where the target object leaves and enters the shooting field of view of the target camera can be determined, and the area where the target object leaves and enters from the shooting field of view of the target camera can be reflected in the preview picture shot by the target camera.

[0045] See also Figure 7 , Figure 7 It shows the order in which the target object enters the preview screen shot by each target camera. The number in the preview screen is the number of the corresponding target camera, and Figure 7 The arrow at the bottom shows the timeline, starting from Figure 7It can be seen that as time goes by, the target object passes through the shooting fields of target cameras 1, 15, 24, 47 and 45 in sequence, and after leaving the right area of ​​the shooting field of target camera 1, the target object enters the shooting field of target camera 15 from the left area, then leaves the shooting field of target camera 15 from the bottom area, then enters the shooting field of target camera 24 from the top area, and leaves the shooting field of target camera 24 from the right area, and so on. Figure 7 In the preview screen, the area where the arrow is located is the area where the target object finally leaves or enters the corresponding preview screen. Figure 7 The preview screens shown are organized as follows: Figure 8 The topological structure shown in FIG. 1 is described below for details.

[0046] In other implementations, the target movement direction of the target object can also be determined based only on the time when the target object enters each target camera and the time when it leaves each target camera. Figure 7 The corresponding target motion flow direction is determined as follows: the target object passes through the shooting fields of view of target cameras 1 , 15 , 24 , 47 , and 45 in sequence.

[0047] The above describes the process of determining the target motion flow direction of the target object based on the video data. In short, the target motion flow direction of the target object can be manually summarized in advance or obtained by automatic analysis based on the video data.

[0048] Since the target object is likely to move along the target motion direction, in order to enable the monitoring personnel to observe the target object continuously, multiple preview panes are set up including a target pane group corresponding to the target motion direction, and the target pane group includes multiple preview panes arranged in sequence along the target direction. When the target object moves along the target motion direction, the target object appears in the preview screen in the multiple preview panes arranged along the target direction in sequence.

[0049] For a better understanding, Figure 7 , Figure 8 and Fig. 9 To explain:

[0050] After analysis, it is determined that the target object will pass through the shooting fields of target cameras 1, 15, 24, 47 and 45 in sequence. Therefore, on the monitoring interface, the preview panes of the preview images shot by target cameras 1, 15, 24, 47 and 45 are arranged in sequence according to the target direction, so that the monitoring personnel can observe the target object continuously.

[0051] Through the above scheme, the monitoring personnel can intuitively and coherently determine the flow of the target object from the monitoring interface. Compared with the prior art in which the preview images shot by multiple target cameras are randomly arranged, through the scheme of the present application, after the target object disappears from a preview image, the monitoring personnel no longer need to look for the next preview image where the target object appears. In other words, the scheme of the present application can reduce the amount of searching by the monitoring personnel, is more in line with the monitoring habits of the monitoring personnel than the prior art, and can also improve the monitoring effect. Moreover, it automatically displays multiple preview images on the monitoring interface at the same time according to the target movement direction of the target object, and there is no need for the monitoring personnel to manually adjust the arrangement order of the preview images, which can greatly reduce the tediousness of the monitoring personnel's operation.

[0052] In this embodiment, any two adjacent preview panes in the target pane group are defined as a first target preview pane and a second target preview pane in sequence, and a first side of the first target preview pane is adjacent to a second side of the second target preview pane, wherein the target object leaves the preview screen in the first target preview pane from the first side and enters the preview screen in the second target preview pane from the second side.

[0053] For ease of understanding, Figures 7 to 9 The following example illustrates this:

[0054] according to Figure 7 The target motion flow of the target object shown can be established Figure 8 The topology shown corresponds to Figure 8 The topology shown can be viewed on the monitoring interface according to Fig. 9 Multiple preview screens are displayed in the manner shown. For example, after the target object leaves the preview screen 15 from the lower area, it enters the preview screen 24 from the upper area of ​​the preview screen 24, then the preview pane displaying the preview screen 24 is placed at the lower side of the preview pane displaying the preview screen 15; after the target object leaves the preview screen 24 from the right area of ​​the preview screen 24, it enters the preview screen 47 from the left area of ​​the preview screen 47, then the preview pane displaying the preview screen 47 is placed at the right side of the preview pane displaying the preview screen 24. Such a setting method is more in line with the monitoring personnel's time and space habits of monitoring screens, and can further improve the monitoring effect.

[0055] It should be noted that, in other implementations, multiple preview images in the target image group may also be arranged in a straight line. Figure 7 In the example, the preview panes displaying preview screen 1, preview screen 15, preview screen 24, preview screen 47, and preview screen 45 may be arranged sequentially in a straight line direction.

[0056] In this embodiment, the preview pane in the target pane group is defined as the first preview pane, the preview pane outside the target pane group is defined as the second preview pane, the target camera corresponding to the first preview pane is defined as the first target camera, and the other target cameras are defined as the second target camera. When the total number of target cameras is greater than the total number of preview panes on the monitoring interface, the method also includes: displaying the preview screen taken by the second target camera in the second preview pane in a rotating manner.

[0057] Specifically, the preview picture displayed in the first preview pane is determined according to the target motion flow direction of the target object. Therefore, the first preview pane displays the preview picture taken by the fixed target camera. Therefore, the target camera corresponding to the first preview pane is defined as the first target camera, and all target cameras except the first target camera are defined as the second target cameras.

[0058] When the total number of target cameras is greater than the total number of preview panes on the monitoring interface, since the preview images captured by all target cameras cannot be displayed in all preview panes at the same time, the preview images captured by the second target camera are displayed in the second preview pane in a round-robin manner. The round-robin interval can be set according to actual needs and is not limited here.

[0059] Among them, Fig.10 As shown, the preview images shot by the second target camera can be randomly displayed in the second preview pane, that is, the arrangement order of the preview images shot by the second target camera can be random, and this application does not impose any limitation.

[0060] In this embodiment, the higher the priority of the second target camera is, the longer the preview image captured by the second target camera is displayed in the second preview pane.

[0061] Specifically, the priority of the target camera is set in advance: if the area monitored by the target camera is more important, the priority of the target camera is higher. In order to enable monitoring personnel to better observe important areas, the higher the priority of the target camera, the longer the preview image taken by the target camera is displayed in the second preview pane. For ease of understanding, an example is provided here to illustrate: if the priority of target camera A is higher than the priority of target camera B, and if the image taken by target camera A in real time is displayed in the second preview pane for 10 consecutive seconds, the image taken by target camera B in real time is displayed in the second preview pane for 5 consecutive seconds.

[0062] In this embodiment, considering that the movement direction of the target object may change with time, step S110 specifically includes: determining the target movement direction of the target object that matches the current moment according to the current moment.

[0063] Specifically, as time goes by, the target movement direction of the target object will also change, so the target camera corresponding to each preview pane on the monitoring interface will also change. For ease of understanding, this is explained here with an example:

[0064] Assume that the west gate of an office park faces an office building. During the morning rush hour from 8 to 9, 80% of the people enter from the west gate to the office building. During the afternoon rush hour from 5 to 6, 80% of the people move from the office building to the gate. The target cameras corresponding to the two time periods are the same. However, the difference is that during the morning rush hour from 8 to 9, the target object moves from target camera A to target camera B and then to target camera C. During the afternoon rush hour from 5 to 6, the target object moves from target camera A to target camera B and then to target camera C. Time period, the target object moves from target camera C to target camera B, and then to target camera A. Therefore, assuming that in the time period from 8 to 9 in the morning, preview pane 1 displays the picture taken by target camera A, preview pane 2 displays the picture taken by target camera B, and preview pane 3 displays the picture taken by target camera C, then in the time period from 5 to 6 in the afternoon, preview pane 1 displays the picture taken by target camera C, preview pane 2 displays the picture taken by target camera B, and preview pane 3 displays the picture taken by target camera A.

[0065] Among them, the target motion flow direction of the target object matching the current moment can be obtained according to a preset time interval, or a trigger time point can be set. When the trigger time point arrives, the current time point is obtained and the target motion flow direction of the target object matching the current moment is determined.

[0066] It is understandable that if the target motion direction of the target object is determined by analyzing the video data, it is necessary to analyze the video data in different time periods to determine the target motion direction corresponding to the target object in different time periods.

[0067] It can be seen from the above content that the above solution can dynamically adjust the preview screen on the monitoring interface to meet the best preview screen effect.

[0068] In this embodiment, when the target object is in the shooting field of view of the target camera, the target identification and target probability are displayed on the preview screen corresponding to the target camera, wherein the target identification is the unique identification of the target camera that the target object is predicted to enter, and the target probability is the probability of the target object entering the predicted target camera.

[0069] Specifically, when the target object is in the shooting field of view of target camera A, if the predicted probability of the target object entering target camera B is 80% and the probability of entering target camera C is 20%, then the unique identifier of target camera B and the target probability of 80% can be displayed on the preview screen shot by target camera A, and the unique identifier of target camera C and the target probability of 20% can be displayed, or only the unique identifier of target camera B and the target probability of 80% can be displayed on the preview screen shot by target camera A. The displayed target identifier and target probability move synchronously with the target object.

[0070] Among them, Fig.11 As shown, the target object can have more than one target motion flow, and accordingly, there can be more than one target pane group. Fig.11 In the figure, the preview panes passed by the dotted lines constitute the target pane group 1, and the preview panes passed by the solid lines constitute the target pane group 2.

[0071] See also Fig.12 , Fig.12 It is a structural diagram of an embodiment of a construction device of the present application. The construction device 200 includes a processor 210, a memory 220 and a communication circuit 230. The processor 210 is coupled to the memory 220 and the communication circuit 230 respectively. The memory 220 stores program data. The processor 210 implements the steps in any of the above-mentioned implementation methods by executing the program data in the memory 220. The detailed steps can be found in the above-mentioned implementation, which will not be repeated here.

[0072] The construction device 200 may be any device with video processing capability, such as an NVR, a VMS or a mobile phone, and is not limited here.

[0073] See also Fig.13 , Fig.13 It is a schematic structural diagram of another embodiment of the construction device of the present application. The construction device 300 includes an acquisition module 310 and a construction module 320 that are interconnected.

[0074] The acquisition module 310 is used to acquire the target motion flow direction of the target object.

[0075] The construction module 320 is used to simultaneously display the preview images in multiple preview panes on the monitoring interface according to the target movement direction.

[0076] Among them, the preview images displayed in different preview panes are shot in real time by different target cameras, and the multiple preview panes include a target pane group corresponding to the target motion direction, the target pane group includes a plurality of preview panes arranged in sequence along the target direction, and when the target object moves according to the target motion direction, the target object appears in the preview images in the plurality of preview panes arranged along the target direction in sequence.

[0077] Among them, the construction device 300 executes the method steps in any of the above-mentioned implementation modes when working. The detailed method steps can be found in the above-mentioned related content and will not be repeated here.

[0078] The construction device 300 may be any device with video processing capability, such as NVR, VMS or mobile phone, and is not limited here.

[0079] See also Fig.14 , Fig.14 The computer-readable storage medium 400 stores a computer program 410, which can be executed by a processor to implement the steps in any of the above methods.

[0080] Among them, the computer-readable storage medium 400 can specifically be a device that can store the computer program 410, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or it can also be a server that stores the computer program 410. The server can send the stored computer program 410 to other devices for execution, or it can also run the stored computer program 410 by itself.

[0081] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for displaying a preview screen, characterized in that: The method comprises: Obtain the target motion flow direction of the target object; According to the target movement direction, simultaneously displaying preview images in multiple preview panes on the monitoring interface; The preview images displayed in different preview panes are shot in real time by different target cameras, and the multiple preview panes include a target pane group corresponding to the target motion flow direction, the target pane group includes a plurality of preview panes sequentially arranged along the target direction, and when the target object moves according to the target motion flow direction, the target object sequentially appears in the preview images in the plurality of preview panes arranged along the target direction; The preview pane in the target pane group is defined as a first preview pane, the preview pane outside the target pane group is defined as a second preview pane, the target camera corresponding to the first preview pane is defined as a first target camera, and the other target cameras are defined as second target cameras, and when the total number of the target cameras is greater than the total number of the preview panes on the monitoring interface, the method further includes: The preview images captured by the second target camera are displayed in the second preview pane in a rotating manner, wherein the higher the priority of the second target camera is, the longer the preview images captured by the second target camera are displayed in the second preview pane.

2. The method according to claim 1, characterized in that Any two adjacent preview panes in the target pane group are defined as a first target preview pane and a second target preview pane in sequence, wherein a first side edge of the first target preview pane is adjacent to a second side edge of the second target preview pane, wherein the target object leaves the preview screen in the first target preview pane from the first side edge and enters the preview screen in the second target preview pane from the second side edge.

3. The method according to claim 1, characterized in that The step of obtaining the target movement direction of the target object comprises: According to the current moment, the target motion direction of the target object that matches the current moment is determined.

4. The method according to claim 1, characterized in that: Before obtaining the target movement direction of the target object, the method further includes: Pre-acquire video data collected by a plurality of target cameras; The target motion flow direction of the target object is determined according to the video data.

5. The method according to claim 4, characterized in that The step of determining the target motion direction of the target object according to the video data comprises: Determine, based on the video data, the area and time at which the target object leaves the shooting field of view of each of the target cameras, and the area and time at which the target object enters the shooting field of view of each of the target cameras; The target movement direction of the target object is determined according to the area and time when the target object leaves the shooting field of view of each target camera and the area and time when the target object enters the shooting field of view of each target camera.

6. The method according to claim 1, characterized in that The method further comprises: When the target object is in the shooting field of view of the target camera, the target identifier and the target probability are displayed on the preview screen corresponding to the target camera, wherein the target identifier is a unique identifier of the target camera that the target object is predicted to enter, and the target probability is the probability of the target object entering the predicted target camera.

7. A construction device, characterized in that: The construction device includes a processor, a memory and a communication circuit, the processor is coupled to the memory and the communication circuit respectively, the memory stores program data, and the processor implements the steps in the method as described in any one of claims 1-6 by executing the program data in the memory.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program can be executed by a processor to implement the steps in the method according to any one of claims 1 to 6.

Images