Image processing method and system for crowd movement

Abstract

The invention relates to an image processing method and system for crowd movement. The method comprises the following steps: S001, segmenting a target area into a plurality of acquisition unit areas along a path; s002, initial information setting: shooting the vacant target area by adopting an overlook angle to obtain an initial image, and storing the initial image; s003, data acquisition: performing real-time shooting on the target area by adopting an overlook angle to obtain a projection image, and storing the projection image; s004, data comparison: comparing the projection image area in the projection image with the initial image to obtain the proportion of the projection part in the projection image; and S005, generating prompt information according to the proportion of the projection part in the projection image, and sending the prompt information to the outside. According to the technical scheme, the pedestrian flow advancing path of the target area can be monitored in real time, the prompt information is generated in a segmented mode and used for sending prompts to the entrance and participants, and the pedestrian flow entering the target area can be managed and controlled conveniently.

Description

Technical Field

[0001] This invention relates to the field of image processing technology, and more specifically to an image processing method and system for crowd movement. Background Art

[0002] In venues such as conference halls, shopping malls, and outdoor plazas, which are often used for high-density events, it is necessary to control the flow of people entering the venue in order to avoid overcrowding and prevent stampedes. This control requires judging the level of congestion in the venue in real time. Currently, the level of congestion in the venue is usually judged manually by real-time surveillance video or real-time observation by staff, and it is not possible to issue timely information to the outside world. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an image processing method and system for crowd movement, so as to solve the problem that the existing technology usually relies on real-time monitoring video or real-time observation by staff to judge the degree of congestion in the venue, and cannot promptly issue information to the outside world for prompting.

[0004] This invention is achieved through the following technical solution:

[0005] An image processing method for crowd movement includes the following steps:

[0006] S001. Divide the target area into several acquisition unit areas along the path;

[0007] S002. Initial information setting: Take a picture of the empty target area from a top-down angle to obtain the initial image and save it;

[0008] S003. Data acquisition: Take real-time photos of the target area from a top-down angle to obtain and store the projected images;

[0009] S004. Data comparison: Compare the area of ​​the projected image in the projected image with the initial image to obtain the proportion of the projected part in the projected image.

[0010] S005. Generate a prompt message based on the proportion of the projected portion in the projected image and send it out.

[0011] Further specifying, the data comparison method in S004 is as follows:

[0012] Several evenly distributed marker elements are pre-set in the acquisition unit area, and several information points are formed in the initial image and the projected image through the marker elements;

[0013] During comparison, the difference or ratio of information points in the projected image and the initial image is calculated, and prompt information is output based on the difference or ratio.

[0014] Further defined, it includes an image acquisition system, an image processing system, and a terminal receiving device for acquiring image information of the target area, wherein the image acquisition system, the terminal receiving device, and the image processing system are communicatively connected;

[0015] The image acquisition system is set above the target area and is used to acquire and output the projected images of moving objects in the target area on the ground.

[0016] The image processing system is used to acquire a projected image, compare the projected image with the area of ​​the target region, calculate the ratio of the projected area to the area of ​​the target region, and generate a prompt signal based on the ratio data.

[0017] The terminal receiving device is used to receive prompt signals and issue feedback information based on the prompt signals.

[0018] Further defined, the target area is a plurality of acquisition unit areas continuously arranged according to a planar coordinate system, and the image acquisition system includes a plurality of acquisition modules that are one-to-one with the plurality of acquisition unit areas;

[0019] The projected image includes planar coordinate system data of the target area and a group of identifiers that correspond one-to-one with several acquisition unit areas.

[0020] Further defined, the identification group includes several identification elements, which are evenly distributed within the acquisition unit area.

[0021] Further specifying, the marking element is any one of a color block, a light-emitting block, or a reflective block.

[0022] Further specifying, the target area is an indoor environment, and the acquisition module is a camera installed above the acquisition unit area.

[0023] Further specifying, the target area is an outdoor environment, and the acquisition module is a camera installed above the acquisition unit area;

[0024] The camera can be fixedly installed on a building or mounted on a flight device.

[0025] Furthermore, the receiving terminal is a mobile device and / or a fixed device.

[0026] Further specifying, the image processing system includes:

[0027] At least one processor and a memory communicatively connected to said at least one processor;

[0028] The memory stores a computer program that can be executed by the at least one processor.

[0029] The beneficial effects of the present invention are:

[0030] This image processing method and system for crowd movement calculates the congestion level of a target area by comparing the projection information of moving or fixed objects within the target area. It can monitor the pedestrian flow path in the target area in real time and generate segmented prompt information to issue prompts to the entrance and participants, facilitating the control of pedestrian flow entering the target area.

[0031] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0032] Figure 1 A flowchart of an image processing method for crowd movement;

[0033] Figure 2 This is an architecture diagram of an image processing system designed for crowd movement.

[0034] Figure 3 This is a schematic diagram showing the division of the data acquisition unit area and the corresponding relationship between the data acquisition modules;

[0035] Figure 4 This is a schematic diagram of the initial image;

[0036] Figure 5 This is a schematic diagram of a projected image;

[0037] In the diagram: 1. Image acquisition system; 2. Image processing system; 3. Terminal receiving device; 4. Target area; 5. Acquisition unit area; 6. Acquisition module; 7. Identification element. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0043] Please see Figure 1-5 The present invention provides a technical solution: an image processing method for crowd movement, comprising the following steps:

[0044] S001. Divide the target area 4 into several acquisition unit areas 5 along the path;

[0045] S002. Initial information setting: Take a picture of the empty target area 4 from a top-down angle to obtain the initial image and save it.

[0046] S003. Data acquisition: Take real-time photos of the target area 4 from a top-down angle to obtain and store the projected images;

[0047] S004. Data comparison: Compare the area of ​​the projected image in the projected image with the initial image to obtain the proportion of the projected part in the projected image.

[0048] S005. Generate a prompt message based on the proportion of the projected portion in the projected image and send it out.

[0049] In this scheme, the target area 4 is photographed to obtain the initial image and the projected image;

[0050] The initial image shows the target area 4 as an empty state, with no moving or fixed objects within the target area 4.

[0051] The projected image is an image obtained when people pass by, that is, an orthographic or near-orthographic image of a moving or fixed object on the ground of the target area 4 from a top-down angle.

[0052] By comparing the projected image with the initial image, the proportion of the projected area of ​​moving or fixed objects in the projected image can be calculated. Based on the proportion, the population density information in the target area 4 can be obtained, and a prompt message can be generated based on the information and sent out to the outside world to prompt the outside world, which can be staff or participants.

[0053] The target area 4 is divided into several data collection unit areas 5 along the pedestrian movement path. Each data collection unit area 5 can independently generate prompt information, that is, generate real-time information at different points on the path, and carry out segmented monitoring and integrated management of the pedestrian movement path.

[0054] That is, by comparing the projection information of moving or fixed objects in target area 4, the congestion level of target area 4 can be calculated. The pedestrian flow path in target area 4 can be monitored in real time and segmented prompt information can be generated to issue prompts to the entrance and participants, so as to facilitate the control of pedestrian flow entering target area 4.

[0055] In this embodiment, the data comparison method in S004 is as follows:

[0056] Several uniformly distributed marker elements 7 are pre-set in the acquisition unit area 5, and several information points are formed in the initial image and the projected image through the marker elements 7;

[0057] During comparison, the difference or ratio of information points in the projected image and the initial image is calculated, and prompt information is output based on the difference or ratio.

[0058] The total number of identification elements 7 in each acquisition unit is fixed and set to N, that is, the number of identification elements that can be displayed in each acquisition unit area 5 in the initial image is N;

[0059] Therefore, the number of identification units that can be displayed in each acquisition unit area 5 in the projected image is M;

[0060] The judgment value of the prompt message is X;

[0061] The formula for calculating the prompt message is:

[0062] X = (NM) / N

[0063] The risk level is determined based on the range of values ​​for X, using the following method:

[0064] When X≤50%, the notification message indicates smooth traffic, and the notification message sent within this range indicates low risk of congestion.

[0065] When 51%≤X≤70%, the alert message indicates a slight congestion state, while the alert message sent within this range indicates a medium-risk congestion state.

[0066] When 71% ≤ X ≤ 90%, a congestion alert is sent, and alerts sent within this range are considered high-risk congestion alerts.

[0067] An image processing system 2 for crowd movement includes an image acquisition system 1, an image processing system 2, and a terminal receiving device 3 for acquiring image information of a target area 4. The image acquisition system 1, the terminal receiving device 3, and the image processing system 2 are communicatively connected.

[0068] The image acquisition system 1 is set above the target area 4 and is used to acquire and output the projection image of the moving object in the target area 4 on the ground.

[0069] The image processing system 2 is used to acquire a projected image, compare the projected image with the area of ​​the target region 4 to calculate the ratio of the projected area in the projected image to the area of ​​the target region 4, and generate a prompt signal based on the ratio data;

[0070] The terminal receiving device 3 is used to receive prompt signals and issue feedback information based on the prompt signals.

[0071] Image acquisition system 1 is used to acquire an initial image and a projected image. The initial image is an image of the empty state of the target area 4, and the projected image is an image of the orthographic projection angle of the moving or fixed object in the target area 4 when there is a moving or fixed object in the target area 4. Image processing system 2 is used to receive the initial image and the projected image, and to compare and calculate the ratio of the projected area in the projected image to the area of ​​the target area 4, and to generate a prompt signal to be sent out.

[0072] Among them, the terminal receiving device 3 is used to receive the prompt signal and send different feedback information according to the congestion level of the prompt information. The feedback information can be in the form of sound, light or vibration.

[0073] In this embodiment, the target area 4 is continuously arranged with several acquisition unit areas 5 according to a plane coordinate system, and the image acquisition system 1 includes several acquisition modules 6 that are one-to-one with the several acquisition unit areas 5.

[0074] The projected image includes planar coordinate system data of the target area 4 and identification groups that correspond one-to-one with several acquisition unit areas 5.

[0075] The planar coordinate system data is the pedestrian movement path within the target area 4, which is divided into several collection unit areas 5. Each collection unit area 5 can independently generate prompt information, that is, real-time information is obtained at different points on the path through the collection module 6, which is used for segmented monitoring and integrated management of the pedestrian movement path.

[0076] In this embodiment, the identification group includes several identification elements 7, which are evenly distributed in the acquisition unit area 5.

[0077] The marking element 7 can be any one of a color block, a light-emitting block, or a reflective block.

[0078] That is, several points can be formed in the acquisition unit area 5 by means of the identification element 7. During the comparison calculation, the ratio can be calculated by the number of points in the projected image and the number of points in the initial image.

[0079] In this embodiment, the target area 4 is an indoor environment, and the acquisition module 6 is a camera installed above the acquisition unit area 5.

[0080] When the target area 4 is an indoor environment, the acquisition module 6 can be fixedly installed on the roof of the building, and can take pictures of the acquisition unit area 5 from above.

[0081] Similarly, when the target area 4 is an outdoor environment, the acquisition module 6 is a camera installed above the acquisition unit area 5;

[0082] The camera can be fixedly installed on a building or mounted on a flight device.

[0083] That is, by using a flight device as the carrier of the acquisition module 6, the flight device can be a drone or a geostationary satellite hovering above the target area 4, or it can take pictures of the acquisition unit area 5 from top to bottom.

[0084] In this embodiment, the receiving terminal is a mobile device and / or a fixed device.

[0085] Among them, the fixed equipment can be a computer in the monitoring room, and the mobile equipment can be smart bracelets or mobile phones worn by staff and participants. They all have independent data conversion functions and can be used to receive prompt signals and emit sound, color and vibration as feedback information according to the prompt signals.

[0086] In this embodiment, the image processing system 2 includes:

[0087] At least one processor and a memory communicatively connected to said at least one processor;

[0088] The memory stores a computer program that can be executed by the at least one processor.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An image processing method for crowd movement, characterized in that: The steps include the following: S001. Divide the target area into several acquisition unit areas along the path; S002. Initial information setting: Take a picture of the empty target area from a top-down angle to obtain the initial image and save it; S003. Data acquisition: Take real-time photos of the target area from a top-down angle to obtain and store the projected images; S004. Data comparison: Compare the area of ​​the projected image in the projected image with the initial image to obtain the proportion of the projected part in the projected image. S005. Generate a prompt message based on the proportion of the projected portion in the projected image and send it out.

2. The image processing method for crowd movement according to claim 1, characterized in that: The data comparison method in S004 is as follows: Several evenly distributed marker elements are pre-set in the acquisition unit area, and several information points are formed in the initial image and the projected image through the marker elements; During comparison, the difference or ratio of information points in the projected image and the initial image is calculated, and prompt information is output based on the difference or ratio.

3. An image processing system for crowd movement is used to execute the image processing method for crowd movement as described in claim 2, characterized in that: The system includes an image acquisition system, an image processing system, and a terminal receiving device for acquiring image information of a target area, wherein the image acquisition system, the terminal receiving device, and the image processing system are communicatively connected. The image acquisition system is set above the target area and is used to acquire and output the projected images of moving objects in the target area on the ground. The image processing system is used to acquire a projected image, compare the projected image with the area of ​​the target region to calculate the ratio of the projected area to the area of ​​the target region, and generate a prompt signal based on the ratio data. The terminal receiving device is used to receive prompt signals and issue feedback information based on the prompt signals.

4. The image processing system for crowd movement according to claim 3, characterized in that: The target area is continuously arranged in a planar coordinate system with several acquisition unit areas, and the image acquisition system includes several acquisition modules that are one-to-one with the several acquisition unit areas. The projected image includes planar coordinate system data of the target area and a group of identifiers that correspond one-to-one with several acquisition unit areas.

5. The image processing system for crowd movement according to claim 4, characterized in that: The identification group includes several identification elements, which are evenly distributed within the acquisition unit area.

6. The image processing system for crowd movement according to claim 5, characterized in that: The marking element can be any one of a color block, a light-emitting block, or a reflective block.

7. The image processing system for crowd movement according to claim 3, characterized in that: The target area is an indoor environment, and the acquisition module is a camera installed above the acquisition unit area.

8. The image processing system for crowd movement according to claim 3, characterized in that: The target area is an outdoor environment, and the acquisition module is a camera installed above the acquisition unit area; The camera can be fixedly installed on a building or mounted on a flight device.

9. The image processing system for crowd movement according to any one of claims 3 to 8, characterized in that: The receiving terminal is a mobile device and / or a fixed device.

10. The image processing system for crowd movement according to claim 9, characterized in that: The image processing system includes: At least one processor and a memory communicatively connected to said at least one processor; The memory stores a computer program that can be executed by the at least one processor.

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