CN110856117A - Intelligent terminal tracking method and device based on WIFI and network camera - Google Patents
Intelligent terminal tracking method and device based on WIFI and network camera Download PDFInfo
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- CN110856117A CN110856117A CN201810878061.6A CN201810878061A CN110856117A CN 110856117 A CN110856117 A CN 110856117A CN 201810878061 A CN201810878061 A CN 201810878061A CN 110856117 A CN110856117 A CN 110856117A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/168—Feature extraction; Face representation
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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
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- H—ELECTRICITY
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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Abstract
The invention discloses an intelligent terminal tracking method and device based on WIFI and a network camera, wherein a broadcast management frame sent by an intelligent terminal in an activated loss mode is intercepted, the broadcast management frame carries identification information of the intelligent terminal, then the identification information of the intelligent terminal is analyzed after the broadcast management frame sent by the intelligent terminal is intercepted, the position of the intelligent terminal is calculated according to the strength of a wireless signal, the position is snapshotted, and the identification information of the intelligent terminal and the data of a snapshotted video image are reported; and finally, recognizing the face in the snapshot video image corresponding to the intelligent terminal with the activated loss mode, performing cross comparison, and locking the current holder of the intelligent terminal with the activated loss mode. The method and the device do not need to establish IPC and mobile phone connection, are simple to realize, have good concealment and are not easy to be perceived; meanwhile, the system does not depend on GPS signals, is slightly influenced by weather, and can accurately lock suspects.
Description
Technical Field
The invention belongs to the technical field of intelligent terminal positioning, and particularly relates to an intelligent terminal tracking method and device based on WIFI and a network camera.
Background
At present, intelligent terminals such as mobile phones and tablet computers are widely popularized, a large amount of private information of users is borne on the mobile phones, the mobile phones cannot be detached from living parties, and the mobile phones need to be carried at any time and are easy to be stolen or lost.
At present, after the mobile phone is lost, the lost mobile phone can be positioned only through the GPS and the mobile phone base station. The lost mobile phone calls a GPS module interface through an APP pre-installed on the mobile phone, the position information of the lost mobile phone is sent to the positioning server, the user logs on the server through the client side, the position information of the mobile phone on the server is accessed, and the lost mobile phone is finally found.
However, such tracing for lost handsets is slow in response and cannot respond in time after a handset loss is detected. The main reason is that the GPS is greatly affected by weather and cannot be located after the signal is turned off. And the error is large through base station triangulation location, which is not beneficial to accurate location of the mobile phone. In addition, after the location of the mobile phone is determined, if the lost mobile phone is stolen, the mobile phone may have been turned to the right before, and even if the identity of the criminal suspect cannot be confirmed after the mobile phone is found.
Because the prior art does not respond timely enough when the lost mobile phone is traced, the mobile phone is relatively troublesome to retrieve. Especially, under the condition that the mobile phone is stolen, the criminal suspect can turn the mobile phone to the hand and sell the stolen goods, and then the criminal suspect is traced after turning the hand, so that the cost of labor and time is high.
Disclosure of Invention
The invention aims to provide an intelligent terminal tracking method and device based on WIFI and a network camera, aiming at the problem that the response is not timely enough when a lost mobile phone is tracked in the prior art, the lost mobile phone is identified by the adjacent network camera IPC through the WIFI, then the IPC is turned to the direction of a mobile phone holder, and all target processes in the direction are captured indiscriminately. Along with the movement of the mobile phone, the mobile phone is continuously detected by IPC, the movement track of the lost mobile phone can be determined, and finally, the mobile phone holder is found out through cross comparison.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an intelligent terminal tracking method based on WIFI and a network camera comprises the following steps:
monitoring a broadcast management frame sent by an intelligent terminal in an activated loss mode, wherein the broadcast management frame carries identification information of the intelligent terminal;
after a broadcast management frame sent by an intelligent terminal is intercepted, the identification information of the intelligent terminal is analyzed, the position of the intelligent terminal is calculated according to the strength of a wireless signal, the position is snapshotted, and the identification information of the intelligent terminal and the data of a snapshotted video image are reported;
and identifying the face in the snapshot video image corresponding to the intelligent terminal with the activated loss mode, performing cross comparison, and locking the current holder of the intelligent terminal with the activated loss mode.
Further, the intelligent terminal tracking method based on the WIFI and the network camera further comprises the following steps:
and drawing the intelligent terminal in the activated loss mode and the movement track of the current holder thereof according to the self position information of the interception equipment.
Further, the identification information of the intelligent terminal is a mobile phone number or an MAC address.
Further, according to the intensity of the wireless signal, the position where the intelligent terminal is located is calculated, and the position is snapshotted, including:
calculating the position of the intelligent terminal according to the strength of the wireless signal;
turning to the position of the intelligent terminal, and starting the undifferentiated snapshot.
Further, the recognizing a face in the grabbing video image corresponding to the intelligent terminal with the activated loss mode, performing cross-comparison, and locking the current holder of the intelligent terminal with the activated loss mode includes:
selecting a corresponding snapshot video image according to the identification information of the intelligent terminal with the activated loss mode, and carrying out face identification;
and comparing the faces identified in the video image, and determining the face with the most identification times as the current holder.
The invention also provides an intelligent terminal tracking device based on WIFI and a network camera, which comprises:
the monitoring module is used for monitoring a broadcast management frame sent by the intelligent terminal in the activated loss mode, wherein the broadcast management frame carries identification information of the intelligent terminal;
the snapshot module is used for analyzing the identification information of the intelligent terminal after monitoring the broadcast management frame sent by the intelligent terminal, calculating the position of the intelligent terminal according to the strength of the wireless signal, snapshotting the position, and reporting the identification information of the intelligent terminal and the data of the snapshot video image;
and the identification module is used for identifying the face in the snapshot video image corresponding to the intelligent terminal with the activated loss mode, performing cross comparison and locking the current holder of the intelligent terminal with the activated loss mode.
Further, the intelligent terminal tracking device based on WIFI and the network camera further comprises:
and the track drawing module is used for drawing the intelligent terminal in the activated loss mode and the moving track of the current holder according to the position information of the intelligent terminal.
Further, the identification information of the intelligent terminal is a mobile phone number or an MAC address.
Further, the snapshot module calculates the position of the intelligent terminal according to the strength of the wireless signal, and performs snapshot on the position, and executes the following operations:
calculating the position of the intelligent terminal according to the strength of the wireless signal;
turning to the position of the intelligent terminal, and starting the undifferentiated snapshot.
Further, the identification module identifies faces in the fear video image corresponding to the intelligent terminal with the activated loss mode, performs cross comparison, locks the current holder of the intelligent terminal with the activated loss mode, and executes the following operations:
selecting a corresponding snapshot video image according to the identification information of the intelligent terminal with the activated loss mode, and carrying out face identification;
and comparing the faces identified in the video image, and determining the face with the most identification times as the current holder.
According to the intelligent terminal tracking method and device based on the WIFI and the network camera, after the mobile phone is lost, the loss processing mode of the mobile phone is activated in an active and passive mode, the lost mobile phone is identified by the adjacent network camera IPC through the WIFI, then the IPC is turned to the direction of a mobile phone holder, and all target processes in the direction are captured indiscriminately. Along with the movement of the mobile phone, the mobile phone is continuously detected by IPC, the movement track of the lost mobile phone can be determined, and finally, the mobile phone holder is found out through cross comparison. The method of the invention has good concealment and is not easy to be perceived; meanwhile, the system does not depend on GPS signals and is slightly influenced by weather; the mobile phone uni-directionally broadcasts without establishing IPC and mobile phone connection, and the realization is simple; the suspect can be accurately locked, the motion trail of the suspect is drawn, and data support is provided for reasonably allocating police resources.
Drawings
Fig. 1 is a flowchart of an intelligent terminal tracking method based on WIFI and a network camera according to the present invention;
FIG. 2 is a diagram of a management frame structure;
FIG. 3 is a diagram of the structure of the Frame Control field of the management Frame;
fig. 4 is a schematic diagram of an antenna of a network camera according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the drawings and examples, which should not be construed as limiting the present invention.
As shown in fig. 1, the intelligent terminal tracking method based on WIFI and a network camera in this embodiment includes the following steps:
and step S1, monitoring a broadcast management frame sent by the intelligent terminal with the activated loss mode, wherein the broadcast management frame carries identification information of the intelligent terminal.
In this embodiment, a smart phone is taken as an example for explanation, and hereinafter referred to as a mobile phone. When the mobile phone is lost, the user can activate the lost mode of the mobile phone in an active and passive mode. The specific activation mode may be activated by a mobile communication operator, or activated by a mobile phone manufacturer, or activated passively after a password is input incorrectly, and the invention is not limited to the specific activation mode.
After being activated to the loss mode, the mobile phone will continuously broadcast a self-defined management frame (Beacon frame) in the 802.11 protocol, and by modifying part of data of the Beacon frame, the frame can only be sensed by a specific device, and the data part in the frame will also carry identification information of the mobile phone, such as a mobile phone number or MAC address information, etc., which is exemplified by the mobile phone number in this embodiment.
In this embodiment, an 802.11 protocol is extended, a fixed field "address" field (as shown in fig. 2) in an original management frame structure is modified, identification information of a mobile phone is filled in the "address" field, an address contains 6 bytes, only 5.5 bytes are needed for mobile phone number storage, and 0.5 field is left as padding.
The Type is 00 and the Beacon frame is 1000 according to the 802.11 protocol. The Subtype field in the Frame Control field of the Beacon Frame is modified (as shown in fig. 3). So that it is not within the frame type specified by the protocol. Through the modification, the frame can only be detected by a specific device (such as IPC capable of identifying the Beacon frame), and a mobile phone holder cannot find the outgoing information of the mobile phone, so that the mobile phone has better concealment.
The network camera IPC of this embodiment has a WIFI module to can identify and process the management frame (Beacon frame) of the modified 802.11 protocol, and WIFI receiving antennas are arranged in each direction, as shown in fig. 4, the network camera and the schematic antenna diagram thereof, 1 is the IPC, and 2, 3, 4, and 5 are the WIFI directional antennas of the IPC, and are mainly used for detecting WIFI signals. The antenna of the IPC is not limited by the invention, as long as the WIFI broadcast management frame of the mobile phone can be detected and the position of the mobile phone can be judged. The directional antenna adopted in the embodiment is not limited to four directions in fig. 4, and 360-degree coverage can be ensured. The smaller the angle at which each antenna receives the signal, the more directional antennas are required to cover 360 degrees, and the higher the accuracy. The present embodiment preferably employs directional antennas, which can more clearly distinguish the signal differences in each direction, so as to calculate the azimuth.
It should be noted that, at present, the city construction is more and more intelligent, the IPCs with the WIFI are more and more installed in the city, and the IPCs with the WIFI gradually become the mainstream products at present, so that the IPCs are adopted to monitor the broadcast management frame of the mobile phone, and the lost mobile phone is searched based on the monitored broadcast management frame, which is a feasible technical scheme.
And step S2, after the broadcast management frame sent by the intelligent terminal is intercepted, the identification information of the intelligent terminal is analyzed, the position of the intelligent terminal is calculated according to the strength of the wireless signal, the position is snapshotted, and the identification information of the intelligent terminal and the data of the snapshotted video image are reported.
When the lost mobile phone enters the WIFI detection range of the IPC, the directional antenna of the IPC receives a WIFI signal. Receiving antennas around the IPC detect a Beacon frame sent out by the mobile phone, analyze the Beacon frame, assume 123456789 according to the mobile phone identification information carried by the receiving antennas, and calculate the approximate position of the mobile phone according to the strength of signals received by each antenna after the mobile phone is found to be a lost mobile phone. After the position of the mobile phone is known, the camera of the IPC is adjusted to turn to the direction of the mobile phone, and then undifferentiated snapshot is started.
It should be noted that, the approximate direction of the mobile phone is calculated according to the strength of the signal received by each antenna, and the direction in which the signal is strongest may be directly set as the direction in which the mobile phone is located. How to calculate the direction of the mobile phone has various technical solutions in the prior art, which are not described herein again.
The network camera IPC calculates the approximate position of the mobile phone according to the strength of the signals received by each antenna, adjusts the camera to turn to the position of the mobile phone, starts to capture, records the video image in the direction, and reports the identification information of the intelligent terminal and the data of the captured video image. The holder of the handset is typically included in the recorded video image, thereby preparing a large amount of data for subsequent analysis.
And step S3, recognizing the face in the snapshot video image corresponding to the intelligent terminal with the activated loss mode, performing cross comparison, and locking the current holder of the intelligent terminal with the activated loss mode.
In this embodiment, a background server may be provided to collect data uploaded by each IPC, where the uploaded data includes identification information of the intelligent terminal and a snapshot video image, and identifies faces in all pictures of the reported data. Firstly, selecting a corresponding snapshot video image according to the identification information of the intelligent terminal with the activated loss mode, and carrying out face identification; then, the faces recognized in the video images are compared, and the current holder is determined.
It is easy to understand that face recognition of video images is a relatively mature technology. When multiple IPCs upload video images corresponding to the same lost mobile phone (determine whether the lost mobile phone is the same according to the mobile phone identification information carried in the management frame), for example, the number of the lost mobile phone is 123456789, only the snapshot video image corresponding to the number of the lost mobile phone of 123456789 is analyzed.
And comparing the faces identified in all the IPC video images for the snapshot video image corresponding to the mobile phone number of 123456789, and if the faces of the same person exist in all the IPC video images, determining that the person is the current holder of the mobile phone. If a plurality of faces are recognized, the person with the most appearance is taken as the current holder of the mobile phone.
Therefore, through the technical scheme of the invention, after the mobile phone is lost, the current holder of the lost mobile phone can be easily locked, so that favorable data is provided for tracing the mobile phone and locking a criminal suspect. Of course, the smart terminal activated in the lost mode is not necessarily a lost mobile phone, and can also be applied to the occasion of tracking people. For example, when a location of a person needs to be tracked, the mobile phone of the person may be activated to enter the lost mode, so that the current location of the person may be tracked, and the location is the periphery of the location where the IPC is located.
In an embodiment of the present invention, the intelligent terminal tracking method based on WIFI and a network camera further includes the following steps:
and step S4, drawing the intelligent terminal with the activated loss mode and the moving track of the current holder thereof according to the position information of the interception equipment.
When the mobile phone with the mobile phone number of 123456789 and the holder move from the point a to the point N, when the IPC monitors the broadcast management frame sent by the mobile phone and takes a snapshot of the broadcast management frame, the mobile phone and the holder report the snapshot data to the background server, so that the background server can report the specific position of the IPC of the data, and the specific position of the IPC serves as the position of the mobile phone, and the movement tracks of the mobile phone and the holder can be approximately drawn.
For example, for the cell phone number 123456789, the trajectory is drawn from point a to point N.
In this embodiment, by accumulating the movement track data, including accumulating the track data of all lost mobile phones, it can be seen that a high-frequency area where the mobile phone is lost occurs, and an area with more concentrated tracks is a higher-frequency area. For a high-incidence area, the public security organization can dispatch more police power to the area for daily patrol and public security event processing, so that the reasonable utilization of police power resources is optimized.
Corresponding to the method, an embodiment of the intelligent terminal tracking device based on the WIFI and the network camera is provided, and the device comprises:
the monitoring module is used for monitoring a broadcast management frame sent by the intelligent terminal in the activated loss mode, wherein the broadcast management frame carries identification information of the intelligent terminal;
the snapshot module is used for analyzing the identification information of the intelligent terminal after monitoring the broadcast management frame sent by the intelligent terminal, calculating the position of the intelligent terminal according to the strength of the wireless signal, snapshotting the position, and reporting the identification information of the intelligent terminal and the data of the snapshot video image;
and the identification module is used for identifying the face in the snapshot video image corresponding to the intelligent terminal with the activated loss mode, performing cross comparison and locking the current holder of the intelligent terminal with the activated loss mode.
The device of the present embodiment corresponds to the foregoing intelligent terminal tracking method based on WIFI and network camera, and in the detailed description of the method, various possible implementation schemes have been set forth.
In an embodiment of the present device, the intelligent terminal tracking device based on WIFI and the network camera further includes:
and the track drawing module is used for drawing the intelligent terminal in the activated loss mode and the moving track of the current holder according to the position information of the intelligent terminal.
In another embodiment of the present device, the identification information of the intelligent terminal is a mobile phone number or a MAC address.
In another embodiment of the apparatus, the snapshot module calculates a position of the intelligent terminal according to the strength of the wireless signal, and performs snapshot on the position, and performs the following operations:
calculating the position of the intelligent terminal according to the strength of the wireless signal;
turning to the position of the intelligent terminal, and starting the undifferentiated snapshot.
In another embodiment of the present invention, the identification module identifies faces in the fear video image corresponding to the intelligent terminal with the activated loss mode, performs cross-comparison, locks the current holder of the intelligent terminal with the activated loss mode, and performs the following operations:
selecting a corresponding snapshot video image according to the identification information of the intelligent terminal with the activated loss mode, and carrying out face identification;
and comparing the faces identified in the video image, and determining the face with the most identification times as the current holder.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, but these corresponding changes and modifications should fall within the protection scope of the appended claims.
Claims (10)
1. An intelligent terminal tracking method based on WIFI and a network camera is characterized by comprising the following steps:
monitoring a broadcast management frame sent by an intelligent terminal in an activated loss mode, wherein the broadcast management frame carries identification information of the intelligent terminal;
after a broadcast management frame sent by an intelligent terminal is intercepted, the identification information of the intelligent terminal is analyzed, the position of the intelligent terminal is calculated according to the strength of a wireless signal, the position is snapshotted, and the identification information of the intelligent terminal and the data of a snapshotted video image are reported;
and identifying the face in the snapshot video image corresponding to the intelligent terminal with the activated loss mode, performing cross comparison, and locking the current holder of the intelligent terminal with the activated loss mode.
2. The intelligent terminal tracking method based on the WIFI and the network camera according to claim 1, further comprising the steps of:
and drawing the intelligent terminal in the activated loss mode and the movement track of the current holder thereof according to the self position information of the interception equipment.
3. The intelligent terminal tracking method based on WIFI and the network camera according to claim 1, wherein the identification information of the intelligent terminal is a mobile phone number or a MAC address.
4. The intelligent terminal tracking method based on WIFI and the network camera according to claim 1, wherein the calculating the position of the intelligent terminal according to the strength of the wireless signal and capturing the position comprises:
calculating the position of the intelligent terminal according to the strength of the wireless signal;
turning to the position of the intelligent terminal, and starting the undifferentiated snapshot.
5. The intelligent terminal tracking method based on WIFI and network camera as claimed in claim 1, wherein the identifying faces in the video image corresponding to the intelligent terminal with the activated loss mode, cross-comparing, and locking the current holder of the intelligent terminal with the activated loss mode comprises:
selecting a corresponding snapshot video image according to the identification information of the intelligent terminal with the activated loss mode, and carrying out face identification;
and comparing the faces identified in the video image, and determining the face with the most identification times as the current holder.
6. The utility model provides a smart terminal tracer based on WIFI and network camera which characterized in that, smart terminal tracer based on WIFI and network camera includes:
the monitoring module is used for monitoring a broadcast management frame sent by the intelligent terminal in the activated loss mode, wherein the broadcast management frame carries identification information of the intelligent terminal;
the snapshot module is used for analyzing the identification information of the intelligent terminal after monitoring the broadcast management frame sent by the intelligent terminal, calculating the position of the intelligent terminal according to the strength of the wireless signal, snapshotting the position, and reporting the identification information of the intelligent terminal and the data of the snapshot video image;
and the identification module is used for identifying the face in the snapshot video image corresponding to the intelligent terminal with the activated loss mode, performing cross comparison and locking the current holder of the intelligent terminal with the activated loss mode.
7. The WIFI and webcam based smart terminal tracking device of claim 6, further comprising:
and the track drawing module is used for drawing the intelligent terminal in the activated loss mode and the moving track of the current holder according to the position information of the intelligent terminal.
8. The intelligent terminal tracking device based on WIFI and the network camera according to claim 6, wherein the identification information of the intelligent terminal is a mobile phone number or a MAC address.
9. The intelligent terminal tracking device based on WIFI and the network camera according to claim 6, wherein the snapshot module calculates the position of the intelligent terminal according to the strength of the wireless signal, and performs snapshot on the position, and performs the following operations:
calculating the position of the intelligent terminal according to the strength of the wireless signal;
turning to the position of the intelligent terminal, and starting the undifferentiated snapshot.
10. The intelligent terminal tracking device based on WIFI and network camera as claimed in claim 6, wherein the recognition module recognizes the face of the intelligent terminal with the activated loss mode in the video image, cross-compares the face of the intelligent terminal with the face of:
selecting a corresponding snapshot video image according to the identification information of the intelligent terminal with the activated loss mode, and carrying out face identification;
and comparing the faces identified in the video image, and determining the face with the most identification times as the current holder.
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| CN112188154B (en) * | 2020-09-03 | 2022-12-06 | 中境建工集团(上海)智能科技股份有限公司 | Integrative collection system of people's face cell-phone |
| TWI784451B (en) * | 2020-12-01 | 2022-11-21 | 宏碁股份有限公司 | Image conversion system and image conversion method |
| CN112733048A (en) * | 2021-01-20 | 2021-04-30 | 杭州云深科技有限公司 | Tracking method of mobile device, electronic device, and medium |
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