CN112738390B - Control method and system of pan-tilt-zoom camera - Google Patents
Control method and system of pan-tilt-zoom camera Download PDFInfo
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- CN112738390B CN112738390B CN202011401264.XA CN202011401264A CN112738390B CN 112738390 B CN112738390 B CN 112738390B CN 202011401264 A CN202011401264 A CN 202011401264A CN 112738390 B CN112738390 B CN 112738390B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
- H04N23/661—Transmitting camera control signals through networks, e.g. control via the Internet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
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Abstract
The invention discloses a control method and a control system of a pan-tilt camera. The method comprises the steps that a first node server acquires a pan-tilt camera control request sent by a client, acquires a corresponding node identifier based on a camera identifier in the pan-tilt camera control request, sends the pan-tilt camera control request and the node identifier corresponding to the camera identifier to a corresponding current central server, queries a target central server corresponding to a camera to be controlled based on the node identifier through the current central server, and sends the pan-tilt camera control request to a second node server corresponding to the node identifier through the target central server; the second node server controls the rotation of the pan-tilt camera to be controlled based on the pan-tilt camera control request, so that the cross-center server control of the pan-tilt camera is realized, the number of the pan-tilt cameras which can be controlled by the client is increased, the monitoring range is expanded, and the problem that the increase of the monitoring range is limited due to the contradiction between the installation space and the number of the cameras is solved.
Description
Technical Field
The embodiment of the invention relates to an automatic control technology, in particular to a control method and a control system of a pan-tilt camera.
Background
At present, security monitoring is more and more widely applied. By arranging the monitoring equipment, the centralized real-time monitoring on the site can be realized.
Because the visual angle of one camera is limited, in order to meet the requirements of a complex monitoring system, a plurality of cameras need to be deployed, and real-time scene information of each angle can be obtained by splicing video images acquired by the plurality of cameras. Although the above-mentioned method can increase the monitoring range, the related art has a contradiction between the installation space and the number of cameras due to the limited installation space, and the number of cameras cannot be increased without limit to increase the monitoring range.
Disclosure of Invention
The invention provides a control method and a control system of a pan-tilt camera, which are used for realizing the control of the pan-tilt camera by crossing a central server and enlarging the monitoring range.
In a first aspect, an embodiment of the present invention provides a method for controlling a pan/tilt camera, including:
a first node server acquires a pan-tilt camera control request sent by a client, and acquires a corresponding node identifier based on a camera identifier in the pan-tilt camera control request, wherein the camera identifier and the node identifier are stored in all the node servers in an associated manner;
the first node server sends the pan-tilt camera control request and the node identification to a corresponding current central server, so that a target central server corresponding to a camera to be controlled is inquired through the current central server based on the node identification, and the pan-tilt camera control request is sent to a second node server corresponding to the node identification through the target central server, wherein the current central server is a father node of the first node server;
and the second node server controls the rotation of the pan-tilt camera to be controlled based on the pan-tilt camera control request.
In a second aspect, an embodiment of the present invention further provides a method for controlling a pan/tilt camera, including:
the method comprises the steps that a current central server receives a pan-tilt camera control request and a node identification sent by a first node server, and whether a pan-tilt camera to be controlled is a camera of the node server on the current central server is judged according to the node identification;
when the current central server is the camera of the node server on the central server, the current central server determines that the central server is a target central server;
when the camera is not the camera of the node server on the center server, the current center server sends the pan-tilt camera control request and the node identification step by step until a target center server corresponding to the pan-tilt camera to be controlled is inquired;
and the target center server sends the pan-tilt camera control request to a second node server corresponding to the node identification, so that the pan-tilt camera to be controlled is controlled to rotate through the second node server based on the pan-tilt camera control request.
In a third aspect, an embodiment of the present invention further provides a control system for a pan/tilt/zoom camera, including central servers and node servers distributed in a tree structure, where the central servers having a hierarchical relationship are in communication connection, and when each central server is used as a parent node, a child node is a node server managed by a corresponding central server:
the first node server is used for acquiring a pan-tilt camera control request sent by a client and acquiring a corresponding node identifier based on a camera identifier in the pan-tilt camera control request; sending the pan-tilt camera control request and the node identification to a corresponding current central server, wherein the camera identification and the node identification are stored in all node servers in an associated manner, and the current central server is a father node of the first node server;
the current central server is used for receiving the pan-tilt camera control request and the node identification sent by the first node server and judging whether the pan-tilt camera to be controlled is the camera of the node server on the current central server or not according to the node identification; when the central server is a camera of a node server on the central server, determining the central server as a target central server; when the camera is not the camera of the node server on the central server, the control request of the pan-tilt camera and the node identification are issued step by step until a target central server corresponding to the pan-tilt camera to be controlled is inquired;
the target center server is used for sending the pan-tilt camera control request to a second node server corresponding to the node identification;
and the second node server is used for controlling the rotation of the pan-tilt camera to be controlled based on the pan-tilt camera control request.
The embodiment of the invention provides a control scheme of a pan-tilt camera, a first node server acquires a corresponding node identifier based on a camera identifier in a pan-tilt camera control request, and sends the pan-tilt camera control request and the node identifier to a corresponding current central server, so as to inquire a target central server corresponding to the camera to be controlled based on the node identification through the current central server, and sending a pan tilt camera control request to a second node server corresponding to the node identifier through the target center server, wherein the second node server controls the rotation of the pan tilt camera to be controlled based on the pan tilt camera control request, so that the cross-center server control of the pan tilt camera is realized, the number of the pan tilt cameras which can be controlled by the client is increased, the monitoring range is expanded, and the problem that the number of the cameras cannot be increased without limit to increase the monitoring range due to the contradiction between the installation space and the number of the cameras is solved.
Drawings
Fig. 1 is a schematic diagram of a server according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of a pan-tilt camera according to an embodiment of the present invention;
fig. 3 is a flowchart of another pan-tilt camera control method according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method for a pan-tilt camera according to another embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling a pan/tilt camera according to another embodiment of the present invention;
fig. 6 is a block diagram of a control system of a pan/tilt camera according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
For ease of understanding, the following description will be made of a service architecture on which the execution of the pan-tilt camera control method depends. The service architecture on which the control method of the pan-tilt camera is executed comprises a central server, wherein the central server can manage a plurality of node servers, one or more central servers can be sequentially connected in series at the lower level of the central server, and each central server manages a plurality of node servers. The embodiment of the invention takes a two-stage central service architecture as an example to explain the service architecture. Fig. 1 is a schematic diagram of a server according to an embodiment of the present invention. As shown in fig. 1, a central service a runs on a central server a, a central service B runs on a central server B, and the central service a is an upper-level service of the central service B. Node service a1, node service B1, … … node service N1 each register services with central service a, i.e., central service a has node service a1, node service B1, … … node service N1 hanging thereon. Node service a2, node service B2, … … node service N2 all register services with central service B, i.e. central service B has node service a2, node service B2, … … node service N2 hung thereon. The node service and the central service are distributed in a tree structure. In addition, before the pan-tilt-zoom. For example, the node service a1 stores therein a camera identification ID and a node identification ID synchronized by the node service a2, may also store therein a camera identification ID and a node identification ID synchronized by the node service B1, and may also store therein a camera identification ID and a node identification ID synchronized by the node service B2, and the like. In addition, each node server stores its own node identification and its own node access address (which may be a node server IP), and a parent node identification ID of the corresponding parent node. Each central server stores the node ID and IP of the corresponding child node, and each central server also stores the node ID of the next level central server adjacent to the central server. The servers corresponding to the adjacent superior and inferior services are required to be able to access each other. Further, the upper server has a right to view data of the lower server, and the lower server cannot view data of the upper server. For example, node service a1 may view data for node service a2, node service B2, … …, node service N2, but node service a2 may not view data for node service a1, node service B1, … …, node service N1.
Fig. 2 is a flowchart of a method for controlling a pan/tilt head camera according to an embodiment of the present invention, where the method may be executed by a node server, and specifically includes the following steps:
The first node server is a node server which receives a pan-tilt-zoom-camera control request sent by a client. The client is an APP or web client installed on the user terminal. The user can log in the node server through the client. In the embodiment of the present invention, if the client a sends the pan/tilt/zoom camera control request to the node server a1, the node server a1 is the first node server. And the pan-tilt camera control request is sent to the node server by the client and is used for indicating the pan-tilt camera node server to be controlled to control the rotation of the corresponding pan-tilt camera. For example, the pan/tilt camera control request includes a camera identification, a pan/tilt angle, a pan/tilt direction, a rotation rate, and the like. The pan-tilt angle represents an angle for controlling the pan-tilt camera to rotate, and the preset step length of the pan-tilt camera can be used as a unit, and the step length of the set number of continuous rotation reaches the pan-tilt angle. The cradle head direction mark controls the cradle head camera to rotate towards which direction. The above rotation rate means a rate of controlling the pan/tilt camera to rotate at a constant speed, or an average rate of controlling the pan/tilt camera to rotate, or the like.
The camera identification is used for uniquely identifying the pan-tilt camera. When one pan-tilt camera is connected to the node server, the camera identification of the pan-tilt camera and the node identification of the corresponding node server are stored in the node server, and the camera identification and the camera type information are also stored in an associated mode. And the node server connected with the pan-tilt camera is called a second node server. The second node server takes the camera identification, the node identification and the camera type information as a data record, and performs full-network synchronization on the data record, namely, the data record is synchronized to other node servers.
Illustratively, the first node server obtains a pan-tilt-zoom.
Optionally, after the first node server obtains the pan/tilt/zoom lens control request sent by the client, the method further includes: and the first node server acquires corresponding camera type information based on the camera identification in the pan-tilt camera control request. And the first node server determines an encapsulation format according to the camera type information, and encapsulates the pan-tilt camera control request according to the encapsulation format to obtain the encapsulated pan-tilt camera control request. The control request of the pan-tilt camera is encapsulated into the message with the preset format, so that the control operation of the pan-tilt camera with different instruction formats and data formats of various manufacturers can be supported.
And the camera identification and the camera type information are stored in all the node servers in an associated manner. The camera type information includes: the system comprises an SIP camera, a terminal camera or a common pan-tilt camera, operation instructions of various types of cameras, packaging requirements of various types of cameras and the like.
The packaging format is used for stipulating the requirement for packaging the pan-tilt camera control request. After the control requests of the pan/tilt camera are packaged, the control requests of the pan/tilt camera with different types and different control instructions are packaged into the same data format, and the pan/tilt camera can be compatible with various pan/tilt cameras. For example, the packaging format may include an instruction format, a data format, and the like. The method comprises the steps of determining an encapsulation format required for encapsulating control requests of various types of pan-tilt cameras into messages with preset data formats on the basis of operation instructions and data formats of the pan-tilt cameras specified by manufacturers of the various types of pan-tilt cameras in advance. The packaging format is stored in each node server, so that the pan-tilt camera control request is packaged according to the packaging format after the pan-tilt camera control request is received, and a message with a set data format is obtained. For example, the pan/tilt camera control request may be encapsulated to obtain a message in JSON format.
Illustratively, the first node server determines an instruction format and a data format according to the camera type information, and encapsulates the pan-tilt-zoom-camera control request according to the instruction format and the data format. Specifically, the first node server queries a database according to the camera type information to obtain an instruction format and a data format required by the packaging operation, obtains content information in the pan-tilt camera control request, and performs data format processing on the content information according to the data format to obtain the content information meeting the data format requirement. And filling the corresponding position in the command with the content information meeting the data format requirement according to the command format to obtain a control command, and encapsulating the control command into a message in a JSON format. It should be noted that, in the embodiment of the present invention, the content information in the pan/tilt/zoom lens control request is encapsulated into a message in JSON format, so as to obtain the encapsulated pan/tilt/zoom lens control request, which is convenient for transmitting the pan/tilt/zoom lens control request through the HTTP protocol. However, the invention does not limit that the message obtained by encapsulating the pan-tilt camera control request can only be in the JSON format, and other message formats convenient for transmission between servers are also applicable to the invention.
And step 220, the first node server sends the pan-tilt camera control request and the node identifier to a corresponding current central server.
Wherein the current central server is a central server that manages the first node server. If the first node server registers service with a certain central server, the central server is the current central server. Because each node server stores the self node identification and the self node access address, and the corresponding father node identification ID of the father node. And when the first node server registers service to the current central server, sending the node identification of the first node server and the IP of the node server to the current central server. The current central server adds the node identifier of the first node server and the server IP in a service identifier list maintained by the current central server.
Optionally, the first node server obtains a node identifier corresponding to the camera identifier. And the first node server matches the node identification with the node identification of the first node server. When the identifiers are consistent, the first node server determines that the pan-tilt camera to be controlled is a camera on the node, and the first node server and the second node server are the same node server.
Specifically, when the camera to be controlled is not the camera on the first node server, a parent node identifier of the first node server is acquired, where the parent node identifier is a node identifier of the current central server. If the pan-tilt camera control request is the encapsulated JSON message, the first node server sends the encapsulated pan-tilt camera control request and a node identifier corresponding to the camera identifier to a current central server corresponding to the father node identifier, so that a target central server corresponding to a camera to be controlled is inquired through the current central server based on the node identifier, and the pan-tilt camera control request is sent to a second node server corresponding to the node identifier through the target central server. Optionally, if the pan/tilt camera control request is not encapsulated, the first node server sends the pan/tilt camera control request, the node identifier, and the corresponding current server.
And step 230, the second node server controls the rotation of the pan-tilt camera to be controlled based on the pan-tilt camera control request.
It should be noted that the pan-tilt camera to be controlled may be a camera on the first node server, or may also be a camera on another node server at the same level, or a camera on another node at a different level, and the present invention is not limited in particular.
Illustratively, the second node server obtains the encapsulated pan/tilt camera control request, and converts the encapsulated pan/tilt camera control request (or the encapsulated pan/tilt camera control request) into a pan/tilt camera executable control instruction through a preset media library pan/tilt camera control request; and sending a control instruction to the corresponding pan-tilt camera based on the IP address of the pan-tilt camera to be controlled so as to control the pan-tilt camera to rotate according to the control instruction. The preset media library is used for converting the pan-tilt camera control request into a control instruction which can be executed by the pan-tilt camera. For example, the preset media library includes library files and drive codes and the like required for the pan-tilt camera to rotate.
Specifically, the pan-tilt camera sends the camera identification and the camera IP to the second node server when being connected to the second node server. The second node server stores the node identification, the camera identification and the camera IP of the second node server in an associated mode, a piece of synchronous data is generated based on the node identification and the camera identification, the whole network synchronization is carried out on the synchronous data, and the camera IP is stored locally in the second node server. Optionally, during the operation of the whole-network data synchronization, a piece of synchronization data may also be generated based on the node identifier, the camera identifier, and the camera IP, and the whole-network synchronization may be performed on the synchronization data. Although the camera IP is synchronized to the other node servers, the pan/tilt camera control request cannot be directly sent to the corresponding pan/tilt camera by the first node server since the node servers are all connected to the central server and there is no direct communication connection between the node servers.
And the second node server determines the IP address (namely the IP of the camera) of the pan-tilt camera to be controlled according to the camera ID in the control instruction, and sends the control instruction to the corresponding pan-tilt camera based on the IP address so as to control the pan-tilt camera to rotate according to the control instruction.
In the technical scheme of the embodiment, the first node server acquires the corresponding node identifier based on the camera identifier in the pan-tilt camera control request, and sends the pan-tilt camera control request and the node identifier to the corresponding current central server, so as to inquire a target central server corresponding to the camera to be controlled based on the node identification through the current central server, and sending a pan tilt camera control request to a second node server corresponding to the node identifier through the target center server, wherein the second node server controls the rotation of the pan tilt camera to be controlled based on the pan tilt camera control request, so that the cross-center server control of the pan tilt camera is realized, the number of the pan tilt cameras which can be controlled by the client is increased, the monitoring range is expanded, and the problem that the number of the cameras cannot be increased without limit to increase the monitoring range due to the contradiction between the installation space and the number of the cameras is solved.
Fig. 3 is a flowchart of another method for controlling a pan-tilt camera according to an embodiment of the present invention, where the method may be executed by a central server, and specifically includes the following steps:
and 310, the current central server receives the pan-tilt camera control request and the node identification sent by the first node server, and judges whether the pan-tilt camera to be controlled is the camera of the node server on the current central server according to the node identification.
Since each central server stores the node identifier and the access address of the node server managed by the central server in association with each other. For example, each central server stores a service identification list in which node identifications and access addresses of node servers managed by the central server are stored in association with each other.
Illustratively, when the current central server receives the node identifier sent by the first node server, the node identifier is matched with the service identifier list. And when the node identification belongs to the service identification list, determining that the pan-tilt camera to be controlled is the camera of the node server on the central server. And when the node identification does not belong to the service identification list, determining that the pan-tilt camera to be controlled is not the camera of the node server on the central server.
And step 320, when the current central server is the camera of the node server on the current central server, determining the current central server as the target central server.
Because each central server stores the node identification and the access address of the node server managed by the central server in an associated manner. When the pan-tilt camera to be controlled is a camera of a node server managed by the current central server, namely, a camera of the node server on the current central server, the current central server is used as a target central server to execute node identification based query to obtain an access address, and a pan-tilt camera control request (or an encapsulated pan-tilt camera control request) is sent to the node server corresponding to the access address, so that the target central server sends the pan-tilt camera control request to a second node server corresponding to the node identification.
For example, when the current center server is used as the target center server, the target center server obtains an access address based on the node identifier query, and sends the pan/tilt camera control request (or the encapsulated pan/tilt camera control request) to the node server corresponding to the access address, so that the target center server sends the pan/tilt camera control request to the second node server corresponding to the node identifier.
And 330, when the camera is not the camera of the node server on the center server, the current center server sends the pan-tilt camera control request and the node identification step by step until a target center server corresponding to the pan-tilt camera to be controlled is inquired.
Specifically, the current central server sends the pan-tilt camera control request and the node identifier to an adjacent next-level central server, and the adjacent next-level central server is used as a new current central server. And when the new current central server determines that the pan-tilt camera to be controlled is the camera of the node server on the central server, the new current central server is used as a target central server corresponding to the pan-tilt camera to be controlled. And when the new current central server determines that the pan-tilt camera to be controlled is not the camera of the node server on the current central server, returning to the step of executing the current central server to send the pan-tilt camera control request and the node identification to the next adjacent central server. And under the condition that the target central server is inquired or the current central server does not have an adjacent next-level central server, ending the circulation.
And 340, the target center server sends the pan-tilt camera control request to a second node server corresponding to the node identifier, so that the pan-tilt camera to be controlled is controlled to rotate through the second node server based on the pan-tilt camera control request.
Specifically, the target center server obtains an access address of the second node server based on the node identifier query, and sends a pan/tilt camera control request (or an encapsulated pan/tilt camera control request) to the second node server corresponding to the access address, so that the second node server controls the pan/tilt camera to be controlled to rotate based on the pan/tilt camera control request (or the encapsulated pan/tilt camera control request), thereby realizing cross-level pan/tilt camera control. The pan-tilt camera controllable by the central server is not limited to the camera of the node server on the central server, but also can be the camera of the node server on the lower-level central server. In addition, a plurality of node services can be configured under the same central service, the central service is only responsible for inquiring and judging whether the camera to be controlled is the camera of the node server on the central server, the node service realizes the control of the pan-tilt camera, the node service is informed to execute the control operation of the pan-tilt camera through the central service, the decoupling between the services is realized, and the working efficiency and the data inquiry speed of the services can be improved.
Optionally, when the pan/tilt/zoom camera control request is sent to the second node server (or the encapsulated pan/zoom camera control request), the node identifier may also be sent at the same time, so that when the second node server receives the pan/zoom camera control request, the node identifier is received at the same time, whether the received node identifier is the node identifier of the node server is verified, and if yes, the pan/zoom camera is controlled to rotate based on the pan/zoom camera control request.
According to the technical scheme, whether the pan-tilt camera to be controlled is the camera of the node server on the center server is judged through the current center server based on the node identification, if yes, the pan-tilt camera control request is directly sent to the second node server corresponding to the node identification, otherwise, the pan-tilt camera control request and the node identification are sent to the adjacent next-level center server, the next-level center server is used as a new current center server, the steps are executed in a circulating mode until the target center server corresponding to the pan-tilt camera to be controlled is inquired, decoupling between services is achieved, data inquiry speed is improved, working efficiency of service of the cross-level control pan-tilt camera is improved, the number of the pan-tilt cameras capable of being controlled by the client side is increased, and the monitoring range is expanded.
On the basis of the above technical solution, a control method of the pan-tilt camera is described with a specific example. Fig. 4 is a flowchart of another pan-tilt camera control method according to an embodiment of the present invention. The method comprises the following steps:
In step 404, the node server a1 determines a node identifier corresponding to the camera identifier in the pan/tilt camera control request.
In step 405, the node server a1 determines whether the node identifier is consistent with the node identifier of its own, if so, step 406 is executed, otherwise, step 407 is executed.
And step 409, the server A sends the encapsulated pan-tilt-zoom-camera control request and the node identification to a node server A2 corresponding to the node identification.
And 411, the server a issues the encapsulated pan-tilt camera control request and the node identifier step by step until a target center server containing the node identifier is inquired.
And step 412, the target server sends the encapsulated pan-tilt-zoom camera control request and the encapsulated node identifier to the node server A2, and returns to execute step 410.
Illustratively, server a issues the encapsulated content information and node identification to the next level of the next central server, server B. And the server B inquires a self-maintained service identification list, and if the node identification belongs to the self-maintained service identification list, the server B is the target central server containing the node identification. And the server B sends the encapsulated pan-tilt-zoom-camera control request and the node identification to the node server B2 corresponding to the node identification. And the node server B2 compares the node identification with the node identification of the node server B, and if the node identification is consistent with the node identification, the encapsulated pan-tilt camera control request is converted into a control instruction executable by the camera B, and the control instruction is sent to the camera B. If the server B determines that the node identification does not belong to the self-maintained service identification list after inquiring the self-maintained service identification list, the server B issues the encapsulated pan-tilt camera control request and the node identification to the next adjacent central server, namely the server C. And the server C inquires a self-maintained service identification list, and if the node identification belongs to the self-maintained service identification list, the step is executed by referring to the step. If the node identifier does not belong to the self-maintained service identifier list, the server C issues the encapsulated pan-tilt camera control request and the node identifier to the next adjacent central server, and so on until a target central server containing the node identifier is inquired or the current central server does not have the next adjacent central server.
In addition, the embodiment of the invention can also control the PTZ camera in a cross-level manner, serve a plurality of nodes configured under the same center, and inform the node service to control the camera through the central server, thereby realizing decoupling between services.
Fig. 5 is a flowchart of a method for controlling a pan/tilt camera according to another embodiment of the present invention. The method comprises the following steps:
The preset point can also be information such as the pan-tilt angle, the rotation speed and the like of the pan-tilt camera set by a user at the client. When a user clicks a preset point on a client, the pan-tilt camera is controlled to rotate rapidly according to information included by the preset point. It should be noted that, the embodiment of the present invention does not limit the specific meaning of the preset point.
The preset point configuration request is generated based on a preset point setting operation of a user at the client. For example, a user sets a preset point of a pan-tilt camera a through a client a, and generates a preset point configuration request based on information such as a pan-tilt angle, a direction of the preset point, a rotation rate and the like included in the preset point. The client a sends a preset point configuration request to the node server a2 corresponding to the client a. The node server a2 receives the preset point configuration request, acquires the configuration information in the preset point configuration request, sets the data identifier corresponding to the configuration information, and stores the data identifier and the configuration information in association. For example, the node server a2 receives the preset point configuration request, acquires the configuration information in the preset point configuration request, assigns a data ID to the configuration information, and stores the data ID and the configuration information in association. For two preset points which are set by a user in sequence and have the same information such as the angle, the speed and the like of the pan-tilt, the node server A2 distributes data IDs to the two preset points respectively.
Note that the client a logs in the node server a2, the camera a is a pan/tilt camera on the node server a2, and the node server a2 performs full-network synchronization between its node identifier and the camera identifier of the camera a.
Optionally, another user sets a preset point of the pan-tilt camera a through the client B, and generates a preset point configuration request based on information such as a camera identifier, a pan-tilt angle, a direction of the preset point, a rotation rate of the preset point, and the like included in the preset point. Correspondingly, the configuration information in the preset point configuration request comprises information such as a camera identifier, a pan-tilt angle, a direction of the preset point, a rotation speed and the like. The client B sends a preset point configuration request to the node server B1 corresponding to the client B. The node server B1 receives the preset point configuration request, acquires the configuration information in the preset point configuration request, sets the data identifier corresponding to the configuration information, and stores the data identifier and the configuration information in association. Although the camera a is a pan-tilt camera on the node server a2, since the client B sets a preset point, the data identification and configuration information corresponding to the preset point are stored in association in the node server B1.
Exemplarily, the first node server further feeds back a feedback message indicating whether the preset point is successfully set to the client, where the feedback message carries the data identifier. For example, the node server a2 sends a feedback message that the preset point is successfully set to the client a, and carries a data ID associated with the configuration information of the set preset point in the feedback message. Or, the node server B1 sends a feedback message that the preset point setting is successful to the client B, and carries the data ID associated with the configuration information of the set preset point in the feedback message.
It should be noted that, the client receives the data identifier sent by the first node server. The client can establish an association relation between the data identifier and the corresponding preset point, so that when the clicking operation of a user on a certain preset point is detected, the preset point is determined to be operated, a pan-tilt-zoom-camera control request is generated based on the data identifier and the camera identifier, and the generated pan-tilt-zoom.
Specifically, the first node server obtains a pan-tilt-zoom camera control request sent by the client, analyzes the pan-tilt-zoom camera control request to obtain a camera identifier, and queries a node identifier corresponding to the camera identifier.
And 504, the first node server acquires configuration information corresponding to the data identifier in the pan-tilt-zoom-camera control request.
And 505, the first node server acquires the camera type information corresponding to the camera identifier in the pan-tilt camera control request.
Specifically, the first node server acquires configuration information corresponding to a data identifier in the pan/tilt camera control request. And the first node server determines an instruction format and a data format according to the camera type information, and encapsulates the configuration information according to the instruction format and the data format. Because the configuration information comprises information such as camera identification, holder angle, direction of the preset point, rotation speed and the like, the first node server processes the information such as the camera identification, the holder angle, the direction of the preset point, the rotation speed and the like based on the data format to obtain the configuration information meeting the requirements of the data format, and generates JSON information meeting the requirements of the instruction based on the configuration information meeting the requirements of the data format.
And 507, the first node server matches the node identifier corresponding to the camera identifier with the node identifier of the first node server, if the node identifiers are consistent, the step 508 is executed, and if not, the step 509 is executed.
Specifically, when the client a detects that the user clicks the preset point of the camera a, the client a sends the pan-tilt camera control request to the node server a2 corresponding to the client. The pan-tilt camera control request comprises a data ID and a camera identification corresponding to a preset point. The node server a2 queries the corresponding node identifier based on the camera identifier, and matches the node identifier with the queried node identifier. Since camera a is a pan-tilt camera on node server a2, the camera identification of camera a is associated with the node of node server a 2. Therefore, the node identifier queried by the node server a2 based on the camera identifier is consistent with the own node identifier of the node server a2, that is, the node server a2 determines that the pan/tilt camera to be controlled is a local camera.
Optionally, when the client B detects that the user clicks the preset point of the camera a, the client B sends the pan-tilt camera control request to the node server B1 corresponding to the client. The node server B1 queries the corresponding node identifier based on the camera identifier, and matches the node identifier of itself with the queried node identifier. Since camera a is a pan-tilt camera on node server a2, the camera identification of camera a is associated with the node of node server a 2. Therefore, the node server B1 performs step 509 based on the inconsistency between the node id queried by the camera id and the own node id of the node server B1.
And step 508, determining that the first node server is the second node server.
And step 510, the first node server sends the encapsulated configuration information and the node identifier corresponding to the camera identifier to a corresponding current central server.
Specifically, the node server B1 sends the encapsulated configuration information and the node identifier corresponding to the camera identifier to the corresponding current central server, that is, the central server a.
And 511, the current central server receives the pan-tilt camera control request and the node identifier sent by the first node server, and judges whether the pan-tilt camera to be controlled is the camera of the node server on the current central server according to the node identifier, if so, executing step 512, otherwise, executing step 514.
Specifically, the central server a receives the encapsulated configuration information and the node identifier sent by the node server B1, queries the service identifier list based on the node identifier, and determines that the node identifier does not belong to the service identifier list according to the query result, and then determines that the pan-tilt camera to be controlled is not the camera of the node server on the central server.
And step 512, the current central server determines that the central server is the target central server.
And 513, taking the current center server as a target center server, sending the pan-tilt camera control request to the second node server corresponding to the node identifier by the target center server, and executing 509.
And 514, the current central server sends the pan-tilt camera control request and the node identification step by step, and the adjacent next-stage central server is used as a new current central server.
Specifically, the central server a sends the encapsulated configuration information and node identifier to the next-level central server B. The central server B receives the encapsulated configuration information and the node identification sent by the central server A, inquires a service identification list based on the node identification, and determines that the node identification belongs to the service identification list according to the inquiry result (because the node server A2 is the node server on the central server B, and the node identification of the node server A2 is in the service identification list of the central server B), the pan-tilt camera to be controlled is determined to be the camera of the node server on the central server. The central server B sends the encapsulated configuration information to the node server a2 according to the server IP corresponding to the node identifier. The node server A2 sends the packaged configuration information to a preset media library, converts the packaged configuration information into a control instruction executable by the pan/tilt camera through the preset media library, and controls the rotation of the pan/tilt camera to be controlled based on the control instruction.
The embodiment of the invention realizes the rapid control of the rotation of the pan-tilt camera by setting the preset points, and sets the preset point information in a mode that the client is connected with the node server, thereby not only realizing the setting of the preset point information of the pan-tilt camera of the server connected with the client, but also setting the preset point information of the pan-tilt camera of the server not connected with the client, and expanding the control mode of the pan-tilt camera.
Fig. 6 is a block diagram of a control system of a pan/tilt camera according to an embodiment of the present invention, where the control system is configured to execute a control method of a pan/tilt camera according to any embodiment of the present invention, implement cross-center server control of the pan/tilt camera, increase the number of pan/tilt cameras that can be controlled by a client, and implement decoupling between services by notifying a node service to control the camera through a center server. As shown in fig. 6, the system includes: the central servers 620 and the node servers 610 are distributed in a tree structure, the central servers 620 having a hierarchical relationship are connected in a communication manner, and when each central server 620 is used as a parent node, a child node is the node server 610 managed by the corresponding central server 620.
The first node server 611 is configured to obtain a pan-tilt camera control request sent by a client, and obtain a corresponding node identifier based on a camera identifier in the pan-tilt camera control request; sending the pan-tilt-zoom camera control request and the node identifier to a corresponding current central server 621, where the camera identifier and the node identifier are stored in all node servers in an associated manner, and the current central server 621 is a parent node of the first node server 611;
the current central server 621 is configured to receive the pan/tilt/zoom camera control request and the node identifier sent by the first node server 611, and determine whether the pan/tilt/zoom camera to be controlled is a camera of a node server on the current central server according to the node identifier; when the camera is the camera of the node server on the center server, the center server is determined to be the target center server 622; when the camera is not the camera of the node server on the center server, the pan-tilt camera control request and the node identifier are issued step by step until the target center server 622 corresponding to the pan-tilt camera to be controlled is inquired;
the target center server 622 is configured to send the pan/tilt camera control request to the second node server 612 corresponding to the node identifier;
and the second node server 612 is configured to control the pan/tilt camera to be controlled to rotate based on the pan/tilt camera control request.
The control system of the pan-tilt camera provided by the embodiment of the invention can execute the control method of the pan-tilt camera provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. A control method of a pan-tilt camera is characterized by comprising the following steps:
a first node server acquires a pan-tilt camera control request sent by a client, and acquires a corresponding node identifier based on a camera identifier in the pan-tilt camera control request, wherein the camera identifier and the node identifier are stored in all the node servers in an associated manner;
the first node server sends the pan-tilt camera control request and the node identification to a corresponding current central server, the central servers with the upper-level and lower-level relations are in communication connection, so that the pan-tilt camera control request and the node identification are sent down step by step through the current central server, an adjacent next-level central server is used as a new current central server until a target central server corresponding to a pan-tilt camera to be controlled is inquired, and the pan-tilt camera control request is sent to a second node server corresponding to the node identification through the target central server, wherein the current central server is a father node of the first node server;
and the second node server controls the rotation of the pan-tilt camera to be controlled based on the pan-tilt camera control request.
2. The method according to claim 1, before the first node server sends the pan-tilt camera control request and the node identification to the corresponding current central server, further comprising:
the first node server matches the node identification with the node identification of the first node server;
and when the identifiers are consistent, the first node server determines that the pan-tilt camera to be controlled is a camera on the node, and the first node server and the second node server are the same node server.
3. The method according to claim 1, wherein after the first node server obtains the pan-tilt-camera control request sent by the client, the method further comprises:
the first node server acquires corresponding camera type information based on a camera identifier in the pan-tilt camera control request, wherein the camera identifier and the camera type information are stored in all the node servers in an associated manner;
the first node server determines a packaging format according to the camera type information and packages the pan-tilt camera control request according to the packaging format;
and the first node server sends the pan-tilt camera control request and the node identifier to a corresponding current central server, and the method comprises the following steps:
and the first node server sends the encapsulated pan-tilt camera control request and the node identification corresponding to the camera identification to the current central server.
4. The method of claim 3, wherein the first node server sends the pan-tilt camera control request and the node identifier to a corresponding current central server, and wherein the sending comprises:
when the camera to be controlled is not the camera on the first node server, acquiring a father node identifier of the first node server;
and sending the encapsulated pan-tilt camera control request and the node identification corresponding to the camera identification to the current central server corresponding to the father node identification.
5. The method of claim 3, wherein the second node server controls the pan-tilt camera to be controlled to rotate based on the pan-tilt camera control request, comprising:
the second node server acquires the encapsulated pan-tilt camera control request, and converts the encapsulated pan-tilt camera control request into a control instruction executable by the pan-tilt camera through a preset media library;
and the second node server sends the control instruction to a corresponding pan-tilt camera so as to control the pan-tilt camera to rotate according to the control instruction.
6. The method according to claim 1, before the first node server obtains the pan-tilt camera control request sent by the client, further comprising:
a first node server acquires a preset point configuration request sent by a client, sets a data identifier corresponding to configuration information in the preset point configuration request, and stores the data identifier and the configuration information in an associated manner;
and the first node server sends the data identification to the client so as to establish the incidence relation between the data identification and the corresponding preset point through the client, and adds the corresponding data identification to the control request of the pan-tilt camera when detecting that the preset point is operated.
7. The method according to claim 6, wherein after the first node server obtains the pan-tilt-camera control request sent by the client, the method further comprises:
the first node server acquires configuration information corresponding to the data identification in the pan-tilt camera control request;
the first node server acquires camera type information corresponding to a camera identifier in the pan-tilt camera control request, wherein the camera identifier and the camera type information are stored in all the node servers in an associated manner;
and the first node server determines a packaging format according to the camera type information and packages the configuration information according to the packaging format.
8. A control method of a pan-tilt-zoom camera is characterized by comprising the following steps:
the method comprises the steps that a current central server receives a pan-tilt camera control request and a node identification sent by a first node server, and judges whether a pan-tilt camera to be controlled is a camera of the node server on the current central server or not according to the node identification, wherein the camera identification and the node identification are stored in all the node servers in an associated mode;
when the current central server is the camera of the node server on the central server, the current central server determines that the central server is a target central server;
when the camera is not the camera of the node server on the center server, the current center server sends the pan-tilt camera control request and the node identification step by step, and the adjacent next-stage center server is used as a new current center server until a target center server corresponding to the pan-tilt camera to be controlled is inquired, wherein the center servers with the relationship of the upper stage and the lower stage are in communication connection;
and the target center server sends the pan-tilt camera control request to a second node server corresponding to the node identification, so that the pan-tilt camera to be controlled is controlled to rotate through the second node server based on the pan-tilt camera control request.
9. The method according to claim 8, wherein the determining whether the pan-tilt camera to be controlled is a camera of a node server on the central server according to the node identifier includes:
the current central server matches the node identification with a service identification list;
when the node identifier belongs to the service identifier list, the current central server determines that the pan-tilt camera to be controlled is a camera of the node server on the current central server;
and when the node identification does not belong to the service identification list, the current central server determines that the pan-tilt camera to be controlled is not the camera of the node server on the current central server.
10. The method according to claim 8, wherein the current center server issues the pan/tilt camera control request and the node identifier step by step until a target center server corresponding to a pan/tilt camera to be controlled is queried, including:
the current central server sends the pan-tilt camera control request and the node identification to an adjacent next-level central server, and the adjacent next-level central server is used as a new current central server;
when the new current central server determines that the pan-tilt camera to be controlled is the camera of the node server on the current central server, the new current central server is used as a target central server corresponding to the pan-tilt camera to be controlled;
and when the new current central server determines that the pan-tilt camera to be controlled is not the camera of the node server on the current central server, returning to the step of executing the current central server to send the pan-tilt camera control request and the node identification to the next adjacent central server.
11. The control system of the pan-tilt-zoom camera is characterized by comprising central servers and node servers which are distributed in a tree structure, wherein the central servers are in communication connection with each other, the central servers are in a superior-subordinate relation, and when each central server is used as a father node, child nodes are node servers managed by the corresponding central server:
the first node server is used for acquiring a pan-tilt camera control request sent by a client and acquiring a corresponding node identifier based on a camera identifier in the pan-tilt camera control request; sending the pan-tilt camera control request and the node identification to a corresponding current central server, wherein the camera identification and the node identification are stored in all node servers in an associated manner, and the current central server is a father node of the first node server;
the current central server is used for receiving the pan-tilt camera control request and the node identification sent by the first node server and judging whether the pan-tilt camera to be controlled is the camera of the node server on the current central server or not according to the node identification; when the camera is the camera of the node server on the central server, determining the central server as a target central server; when the camera is not the camera of the node server on the central server, the control request of the pan-tilt camera and the node identification are issued step by step, the adjacent next-stage central server is used as a new current central server until a target central server corresponding to the pan-tilt camera to be controlled is inquired, wherein the central servers with the relationship of the upper stage and the lower stage are in communication connection;
the target center server is used for sending the pan-tilt camera control request to a second node server corresponding to the node identification;
and the second node server is used for controlling the rotation of the pan-tilt camera to be controlled based on the pan-tilt camera control request.
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