CN111405243A - Target monitoring method and system based on multiple cameras - Google Patents
Target monitoring method and system based on multiple cameras Download PDFInfo
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- CN111405243A CN111405243A CN202010131003.4A CN202010131003A CN111405243A CN 111405243 A CN111405243 A CN 111405243A CN 202010131003 A CN202010131003 A CN 202010131003A CN 111405243 A CN111405243 A CN 111405243A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
- G06T7/292—Multi-camera tracking
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
Abstract
The invention discloses a target monitoring method based on multiple cameras, which comprises the following steps: acquiring target information acquired by each camera; when the target enters a multi-view overlapping area, the first camera sends handover prompt information; when the handover prompt information is received, obtaining coordinate information of the target through a homography matrix converted between views; judging whether the target is in the visual field range of a second camera according to the coordinate information of the target; when the target is in the visual field range of the second camera, the first camera stops tracking the target, and the second camera tracks the target. By the method, specific target monitoring based on multiple cameras can be realized, and the specific target can be tracked across cameras.
Description
Technical Field
The invention relates to the technical field of video monitoring, in particular to a target monitoring method and a target monitoring system based on multiple cameras.
Background
Video monitoring systems have wide application in home security, community security, and defense security, which relate to various aspects of people's daily life, such as: people flow control in subways and tourist attractions, access control in places with high security level and the like.
In the prior art, a monitoring system only records events occurring in a monitoring area without omission, lacks of processing information, needs to determine a target artificially by security staff if the target needs to be positioned or tracked, continuously observes the target, the target can appear in different cameras, the security staff needs to fetch a large amount of video information, and the concentration of the spirit and the working efficiency of the security staff can be obviously reduced after long-time observation. Even appear among the prior art target tracking system based on single camera, can liberate security personnel from the work of the complicated vision of looking over, but because the limitation in the field of vision of single camera, it can not carry out continuous tracking to the moving target usually, also is difficult to solve the problem of sheltering from under the complicated scene simultaneously.
Therefore, the method for monitoring the specific target based on the multiple cameras has important practical significance.
Disclosure of Invention
The embodiment of the disclosure provides a target monitoring method and a target monitoring system based on multiple cameras. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
In some optional embodiments, a multi-camera based object monitoring method, comprises:
acquiring target information acquired by each camera;
when the target enters a multi-view overlapping area, the first camera sends handover prompt information;
when the handover prompt information is received, obtaining coordinate information of the target through a homography matrix converted between views;
judging whether the target is in the visual field range of a second camera according to the coordinate information of the target;
when the target is in the visual field range of the second camera, the first camera stops tracking the target, and the second camera tracks the target.
Further, when the target is not in the field of view of the second camera, the method further comprises:
obtaining coordinate information of the target through a homography matrix converted between the visual fields;
judging whether the target is in the visual field range of a third camera according to the coordinate information of the target;
when the target is in the visual field range of the third camera, the first camera stops tracking the target, and the third camera tracks the target.
Further, the acquiring target information collected by each camera further includes:
acquiring image information acquired by each camera;
establishing a target index according to the attribute characteristics of the target in the image information;
and acquiring target information acquired by each camera according to the target index.
Further, the target information is queried through the client.
In some optional embodiments, a multi-camera based object monitoring system, comprising:
the camera is used for acquiring image information and sending the image information to the streaming media server;
the streaming media server is used for receiving the image information and sending the image information to the intelligent analysis server;
the intelligent analysis server is used for processing the received image information to obtain light-weight readable structured image information, establishing a target index according to the attribute characteristics of a target in the image information, and sending the light-weight readable structured image information and the target index to the data storage server;
and the data storage server is used for storing the received lightweight readable structured image information and the target index.
Further, the cameras include a gun camera and a dome camera.
Further, the number of the cameras is two or more.
Further, still include:
and the instruction control server is used for sending a control instruction according to the image information in the intelligent analysis server.
Further, still include:
and the holder control unit is used for receiving the control instruction and regulating and controlling the camera according to the control instruction.
Further, still include:
the Web back-end server is used for developing background services of the target monitoring system based on the multiple cameras;
and the client is used for logging in the target monitoring system based on the multiple cameras to realize the query of the target.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the invention provides a specific target tracking method based on multiple cameras, which can realize moving target tracking, realize multi-camera tracking for a specific moving target according to a space-time correlation automatic switching mode, and release a target in the previous visual field after detecting the target in the next visual field according to the moving direction of the target when the target is positioned in a multi-visual field overlapping area. The beneficial effect of this scheme includes:
(1) the efficiency of image retrieval is greatly improved, and the target can be quickly retrieved according to the characteristic conditions after an event occurs.
(2) The data storage efficiency is greatly improved, and the video information stored by the traditional video monitoring usually has the defects of more redundant information and unreadability. Through the data after the intelligent analysis server processes, effective information in the video is reserved, the data storage efficiency is greatly improved, and the value of data precipitation is effectively exerted.
(3) The system is built by adopting a B/S framework, a Web back-end management server is configured with a public network IP, and an operator can realize remote office after authorization by a manager.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow diagram illustrating a method for multi-camera based object monitoring in accordance with an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating a configuration of a multiple-camera based object monitoring system in accordance with an exemplary embodiment;
FIG. 3 is a schematic diagram illustrating the structure of an intelligent analytics server, according to an exemplary embodiment;
fig. 4 is a schematic diagram illustrating a configuration of a multi-camera based object monitoring system according to an exemplary embodiment.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The first embodiment is as follows:
the embodiment of the disclosure provides a target monitoring method based on multiple cameras, and fig. 1 is a schematic flow chart of the target monitoring method based on multiple cameras according to an exemplary embodiment.
As shown in fig. 1, a target monitoring method based on multiple cameras includes:
s101, acquiring target information acquired by each camera;
the embodiment of the disclosure provides a target monitoring method based on multiple cameras, when a specific target needs to be queried, information of the specific target is input through a client, and the query is performed according to the obtained target information input by the client.
In some exemplary scenarios, if a girl with long hair and a red coat needs to be queried, attribute features of the girl, the long hair and the red coat are input into a client for target query, and the client can be a mobile terminal such as a personal computer and a mobile phone.
The method comprises the steps of acquiring target information acquired by each camera according to target information input by a client, wherein the target information includes image information acquired by each camera, establishing a target index according to the attribute characteristics of a target in the image information, and quickly acquiring the target information in the image information according to the established target index. In some exemplary scenes, according to the attribute characteristics of people, vehicles, objects, colors, numbers and the like presented in the video pictures, the attribute characteristics are stored into a corresponding structured database, an efficient index is built, and the target can be quickly retrieved according to characteristic conditions after an event occurs.
By the method, the retrieval efficiency of the image can be greatly improved.
Step S102, when the target enters a multi-view overlapping area, a first camera sends handover prompt information;
in the target tracking process based on multiple cameras, when a target is in an overlapping area of visual fields, the target can be simultaneously detected by multiple visual fields as a target, and in the process that the target does not completely leave the visual field range of one camera to reach the independent visual field of another camera, the multiple visual fields can continuously track the target respectively, so that repeated tracking can cause repeated calculation, and resources of a computer are wasted to a certain extent. In order to reduce the calculation amount, the invention provides an object handover strategy based on an overlapping area, namely when an object appears in a public visual field, according to the moving direction of the object, after the object is detected in the next visual field, the object tracking in the previous visual field is released.
Therefore, when the target enters the multi-view overlapping area, the first camera sends Handover prompt information, specifically, a Handover Flag of the first camera is true, and sends a trigger signal Handover start to the decision program.
Step S103, when the handover prompt information is received, obtaining coordinate information of the target through a homography matrix converted between the visual fields;
when a trigger signal sent by a first camera, namely handover prompt information, is received, coordinates of a target are converted through a homography matrix converted among views, the homography matrix mainly refers to a plane homography matrix, and images are converted from one view to another view through perspective conversion.
Step S104, judging whether the target is in the visual field range of a second camera according to the coordinate information of the target;
and judging the position relation between the coordinates of the target under the view angle of the second camera and the coordinate range of the view area of the second camera according to the coordinate information of the target under the view of the second camera and the coordinate information of the view area of the second camera, and if the position relation is within a certain tolerance range, sending a handover success signal Object _ Receive _ true to the first camera, and meanwhile, discarding the target by the first camera, so that the target enters the view area of the second camera.
And S105, when the target is in the visual field range of the second camera, stopping tracking the target by the first camera, and tracking the target by the second camera.
By the method, when the target enters the multi-view overlapping area, the target in the previous view can be released after the target is detected in the next view according to the moving direction of the target, so that the calculated amount is greatly reduced, some resource space is released to a certain extent, and the tracking load and the calculation resources of the camera are dynamically balanced.
Further, when the target is not in the field of view of the second camera, the method further comprises:
obtaining coordinate information of the target through a homography matrix converted between the visual fields;
judging whether the target is in the visual field range of a third camera according to the coordinate information of the target;
when the target is in the visual field range of the third camera, the first camera stops tracking the target, and the third camera tracks the target.
When the target is not in the visual field area of the second camera, sending a signal Object _ Receive of failure of handover to the first camera, continuing to convert the coordinate of the target through a homography matrix converted among visual fields after receiving the signal of failure of handover, converting the coordinate of the target from the coordinate under the view angle of the first camera to the coordinate under the view angle of the third camera, judging the position relation between the coordinate under the view angle of the target and the coordinate range of the visual field area of the third camera, if the position relation is within a certain tolerance range, sending a signal Object _ Receive true of success of handover to the first camera, and simultaneously discarding the target by the first camera, then the target enters the visual field area of the third camera.
By the method, the cross-camera tracking of the target is realized.
Further, the acquiring target information collected by each camera further includes:
acquiring image information acquired by each camera;
establishing a target index according to the attribute characteristics of the target in the image information;
and acquiring target information acquired by each camera according to the target index.
The method comprises the steps of acquiring target information acquired by each camera according to target information input by a client, wherein the target information includes image information acquired by each camera, establishing a target index according to the attribute characteristics of a target in the image information, and quickly acquiring the target information in the image information according to the established target index. In some exemplary scenes, according to the attribute characteristics of people, vehicles, objects, colors, numbers and the like presented in the video pictures, the attribute characteristics are stored into a corresponding structured database, an efficient index is built, and the target can be quickly retrieved according to characteristic conditions after an event occurs.
By the method, the retrieval efficiency of the image can be greatly improved.
Further, the target information is queried through the client.
The embodiment of the disclosure provides a target monitoring method based on multiple cameras, when a specific target needs to be queried, information of the specific target is input through a client, and the query is performed according to the obtained target information input by the client.
In some exemplary scenarios, if a girl with long hair and a red coat needs to be queried, attribute features of the girl, the long hair and the red coat are input into a client for target query, and the client can be a mobile terminal such as a personal computer and a mobile phone.
Example two:
the embodiment of the present disclosure provides a target monitoring system based on multiple cameras, and fig. 2 is a schematic structural diagram of a target monitoring system based on multiple cameras according to an exemplary embodiment;
as shown in fig. 2, a multi-camera based object monitoring system includes:
201. the camera is used for acquiring image information and sending the image information to the streaming media server;
in some exemplary scenarios, the cameras are two or more cameras, the cameras include a gun camera and a dome camera, the dome camera is mainly used for fixed view monitoring, such as stair hall monitoring and office monitoring, and the gun camera is suitable for target moving scene monitoring, such as road monitoring. In the embodiment of the invention, the whole monitoring picture consists of a plurality of guns and ball machines, the guns and the ball machines are linked in real time, and the acquired image information is sent to the streaming media server.
202. The streaming media server is used for receiving the image information and sending the image information to the intelligent analysis server;
the streaming media refers to a media form of transmitting audio, video and multimedia files in a network in a streaming manner, and compared with a network playing form of watching after downloading, the streaming media server has the main functions of transmitting the video files to a client by a streaming protocol (RTP/RTSP, MMS, RTMP and the like) for online watching of a user, receiving real-time video streams from video acquisition and compression software, and then live broadcasting the video streams to the client by the streaming protocol. Due to the superiority of the streaming media technology, the technology is widely applied to video-on-demand, video conference, remote education, remote medical treatment and online live broadcast systems.
In the embodiment of the disclosure, the streaming media server receives the video information sent by the camera, and sends the video information to the intelligent analysis server.
203. The intelligent analysis server is used for processing the received image information to obtain light-weight readable structured image information, establishing a target index according to the attribute characteristics of a target in the image information, and sending the light-weight readable structured image information and the target index to the data storage server;
the intelligent analysis server is used for processing and analyzing the received video image information, and is a software core of the whole system, and fig. 3 is a schematic structural diagram of the intelligent analysis server provided according to an exemplary embodiment.
As shown in fig. 3, an intelligent analysis server includes:
a 301 obtaining module, configured to obtain target information collected by each camera;
a 302 sending module, configured to send a control instruction to an instruction control server when the target enters a multi-view overlapping area, and control a first camera to send handover prompt information;
a 303 conversion module, configured to obtain coordinate information of the target through a homography matrix converted between views when the handover prompt information is received;
a 304 judging module, configured to judge whether the target is within a field of view of a second camera according to the coordinate information of the target;
and the 305 handover module is used for sending a control instruction to the instruction control server when the target is in the visual field range of the second camera, controlling the first camera to stop tracking the target, and tracking the target by the second camera.
And 306, the data processing module is used for processing the received image information to obtain light-weight readable structured image information, the video information stored in the traditional video monitoring usually has the defects of more redundant information and unreadability, and the effective information in the video is reserved through the data processed by the data processing module, so that the data storage efficiency is greatly improved, and the value of data deposition is effectively exerted.
307, the target index module is configured to establish a target index according to the attribute feature of the target in the image information. The system is used for storing the characters of people, vehicles, objects, colors, numbers and other attributes presented in the video pictures into a corresponding structured database, establishing an efficient index, and quickly searching the target according to the characteristic conditions after an event occurs.
204. And the data storage server is used for storing the received lightweight readable structured image information and the target index. And the basic information of the management system is stored, such as camera point location, camera position information, camera network address and the like.
Further, the cameras include a gun camera and a dome camera.
Further, the number of the cameras is two or more.
Further, still include:
205. and the instruction control server is used for sending a control instruction according to the image information in the intelligent analysis server.
The instruction control server is connected with the intelligent analysis server, and data collected by the camera, streaming media interaction, algorithm configuration and the like are managed through the unified instruction control server.
Further, still include:
206. and the holder control unit is used for receiving the control instruction and regulating and controlling the camera according to the control instruction.
The pan-tilt control unit is connected with the instruction control server, is used for receiving a control instruction sent by the instruction control server, is connected with the camera set, and is used for regulating and controlling the camera set according to the control instruction.
Further, still include:
207. and the Web back-end server is used for developing the background service of the target monitoring system based on the multiple cameras and developing and deploying the background service of the system, and after the background service is started, the client can access the system according to the specified network address.
208. And the client is used for logging in the target monitoring system based on the multiple cameras, inputting a specified network address in the browser, and then logging in the system after inputting a correct user name and a correct password, so that man-machine interaction is realized, and the target is queried. The target monitoring system based on the multiple cameras provided by the embodiment of the disclosure is built by adopting a B/S architecture, the Web back-end management server is configured with a public network IP, and after authorization by a manager, an operator can realize remote office.
Fig. 4 is a schematic diagram illustrating a configuration of a multi-camera based object monitoring system according to an exemplary embodiment.
As shown in fig. 4, a multi-camera based object monitoring system includes:
the system comprises a gunlock camera, a dome camera, a streaming media server, an intelligent analysis server, a data storage server, a Web back-end server and a client.
The disclosed embodiments provide a computer readable medium, on which computer readable instructions are stored, the computer readable instructions being executable by a processor to implement the multi-camera based target monitoring method provided by the above embodiments.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A target monitoring method based on multiple cameras is characterized by comprising the following steps:
acquiring target information acquired by each camera;
when the target enters a multi-view overlapping area, the first camera sends handover prompt information;
when the handover prompt information is received, obtaining coordinate information of the target through a homography matrix converted between views;
judging whether the target is in the visual field range of a second camera according to the coordinate information of the target;
when the target is in the visual field range of the second camera, the first camera stops tracking the target, and the second camera tracks the target.
2. The method of claim 1, further comprising, when the target is not within the second camera field of view:
obtaining coordinate information of the target through a homography matrix converted between the visual fields;
judging whether the target is in the visual field range of a third camera according to the coordinate information of the target;
when the target is in the visual field range of the third camera, the first camera stops tracking the target, and the third camera tracks the target.
3. The method of claim 1, wherein the obtaining target information collected by each camera further comprises:
acquiring image information acquired by each camera;
establishing a target index according to the attribute characteristics of the target in the image information;
and acquiring target information acquired by each camera according to the target index.
4. The method of claim 1, wherein the target information is queried by a client.
5. A multi-camera based object monitoring system, comprising:
the camera is used for acquiring image information and sending the image information to the streaming media server;
the streaming media server is used for receiving the image information and sending the image information to the intelligent analysis server;
the intelligent analysis server is used for processing the received image information to obtain light-weight readable structured image information, establishing a target index according to the attribute characteristics of a target in the image information, and sending the light-weight readable structured image information and the target index to the data storage server;
and the data storage server is used for storing the received lightweight readable structured image information and the target index.
6. The system of claim 5, wherein the cameras comprise a gun camera and a dome camera.
7. The system of claim 5, wherein the number of cameras is two or more.
8. The system of claim 5, further comprising:
and the instruction control server is used for sending a control instruction according to the image information in the intelligent analysis server.
9. The system of claim 5, further comprising:
and the holder control unit is used for receiving the control instruction and regulating and controlling the camera according to the control instruction.
10. The system of claim 5, further comprising:
the Web back-end server is used for developing background services of the target monitoring system based on the multiple cameras;
and the client is used for logging in the target monitoring system based on the multiple cameras to realize the query of the target.
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Application publication date: 20200710 |