CN104113737A - System for preventing monitoring video from being replaced and method thereof - Google Patents
System for preventing monitoring video from being replaced and method thereof Download PDFInfo
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Abstract
The invention provides a system for preventing a monitoring video from being replaced. The system comprises a video camera, a lighting module, a control module and a monitoring terminal. The video camera is used for shooting a scene to be monitored. The lighting module is arranged in the scene shot by the video camera. The control module is connected with the lighting module and used for generating a control signal to control whether the lighting module emits light. The monitoring terminal is used for reading the brightness of pixel points corresponding to the lighting module in a video signal shot by the video camera and conducting binarization on the brightness to obtain serilization data and verify the serilization data, the serilization data are verified, if the data are verified to be not correct, the fact that a monitoring video signal is replaced in the transmission process can be judged. A method for preventing the monitoring video from being replaced is further disclosed. The lighting module is arranged in the scene shot by the video camera, the data of the lighting module can be verified in the video signal in the monitoring terminal, if the verified data are not correct, the fact that the monitoring video is replaced can be judged, and an alarm signal is triggered.
Description
Technical field
The present invention relates to technical field of video monitoring, more specifically, relate to a kind of system and method thereof that prevents that monitor video is replaced.
Background technology
Current video monitoring is all widely used in a lot of fields because of its intuitive.But video monitoring, in the process of transmission, exists real-time monitor video to be replaced by the situation of " pre-recorded videos " repeat playing.Under normal circumstances, the vision signal that video camera is taken is directly connected to monitoring terminal (shown in accompanying drawing 1); When not being monitored terminal when there being people to want to do some things and seeing, can be in advance with recording, player record one section " pre-recorded videos ", the normal monitoring image (shown in accompanying drawing 2) of now recording; After the video long enough of pre-recording, record, player change loop play state into, cut off the connecting line of original vision signal, " pre-recorded videos " signal that reconfiguration broadcasts to the circulation of record, player, what now monitoring terminal was seen is the picture of " pre-recorded videos ", and the situation of monitoring site (shown in accompanying drawing 3) in real time.
Current Surveillance center, because need the place of monitoring many, the quantity of corresponding video camera also can be a lot, in order to save space, general be all by the picture disply of some key point video cameras shootings on large-screen, the picture of other part video cameras is all to adopt the mode of little picture to show, so more easily there is the hidden danger that cannot discover in time after video replacing, while there is this situation, if the moment that monitor is replaced at monitor video does not have careful checking monitoring video and finds to be replaced, after entering repeat playing, the video of replacing is just difficult to be found, even if find that the moment video that video is replaced has some to beat, also be probably considered to fault once in a while of equipment or interference and be left in the basket.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of system and method thereof that prevents that monitor video is replaced, and can solve the monitor video existing in prior art and be replaced the problem of discovery in time that is not easy.
For achieving the above object, technical scheme of the present invention is achieved in that
On the one hand, the invention provides a kind of system that prevents that monitor video is replaced, comprising: video camera, light emitting module, control module and monitor terminal, wherein, video camera, for taking the scene that needs monitoring; Light emitting module, is arranged in the scene of video camera shooting; Control module, is connected with light emitting module, whether luminous controls light emitting module for generation of control signal; Monitor terminal, for reading the brightness of the pixel that the vision signal light emitting module of shot by camera is corresponding and its binaryzation being obtained to serialized data, and serialized data is carried out to verification, if checking data is incorrect, can judge that monitor video signal is replaced in transmitting procedure.
Preferably, control module also comprises: processing unit and transmitting element, wherein,
Processing unit, for control signal is carried out to data processing, by after the data serializing after processing, then is converted into the luminous time of light emitting module;
Transmitting element, for sending to light emitting module by the luminous time.
Preferably, light emitting module is one or more in controlled LED luminous tube, some LASER Discharge Tube, generating laser, shot-light, light-emitting nixie tube or liquid crystal display screen.
Preferably, the position that needs the pixel that definite light emitting module is corresponding before the brightness of the pixel that light emitting module is corresponding in reading the vision signal of shot by camera, comprise: when video camera is fixed, light emitting module is fixedly time, gather the luminous and non-luminous two width images of light emitting module and carry out subtracting computing and carrying out binary conversion treatment according to pixels, read the image pixel after processing, the position when reading pixel value and be 1 is the pixel position that light emitting module is corresponding; When camera motion, light emitting module are fixedly time, light emitting module is fixed to shooting picture, intercepting light emitting module image is around as the contrast foundation of identification, according to the shape of light emitting module object around, the position that obtains light emitting module, reads the pixel value corresponding with light emitting module.
Preferably, monitor terminal also comprises alarm unit, for trigger alarm signal when checking data is incorrect.
On the other hand, the present invention also provides a kind of method that prevents that monitor video is replaced, and comprising: in the scene of taking at video camera, light emitting module is set; Whether control module generation control signal is controlled light emitting module luminous; Monitor terminal reads the brightness of the pixel that in the vision signal of shot by camera, light emitting module is corresponding and its binaryzation is obtained to serialized data, and serialized data is carried out to verification, if checking data is incorrect, can judge that monitor video signal is replaced in transmitting procedure.
Preferably, control module produces control signal and controls whether light emitting module is luminous comprises: control signal is carried out to data processing, by after the data serializing after processing, then be converted into the luminous time of light emitting module; The luminous time is sent to light emitting module.
Preferably, light emitting module is one or more in controlled LED luminous tube, some LASER Discharge Tube, generating laser, shot-light, light-emitting nixie tube or liquid crystal display screen.
Preferably, before the brightness of the pixel that light emitting module is corresponding in reading the vision signal of shot by camera, also comprise: the position of determining the pixel that light emitting module is corresponding, comprise: when video camera is fixed, light emitting module is fixedly time, gather the luminous and non-luminous two width images of light emitting module and carry out subtracting computing and carrying out binary conversion treatment according to pixels, read the image pixel after processing, the position when reading pixel value and be 1 is the pixel position that light emitting module is corresponding; When camera motion, light emitting module are fixedly time, light emitting module is fixed to shooting picture, intercepting light emitting module image is around as the contrast foundation of identification, according to the shape of light emitting module object around, the position that obtains light emitting module, reads the pixel value corresponding with light emitting module.
Preferably, when checking data is incorrect, monitor terminal trigger alarm signal.
Technique effect of the present invention:
Owing in the scene of taking at video camera in the present invention, a controlled light emitting module being set, at monitor terminal by the brightness of the pixel that in reading vision signal, this light emitting module is corresponding and by its binaryzation, obtain serialized data, these data are carried out to checking treatment, if checking data is incorrect, can judge that monitor video signal is replaced in the process of transmission, trigger alarm signal, even if the video showing on little picture is replaced also and can finds in time, prevent that video is stolen, facilitated the monitoring of staff to video.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation that vision signal that video camera takes is directly connected to monitoring terminal;
Structural representation when Fig. 2 shows pre-recorded videos and inserts the normal monitor video record;
Fig. 3 shows pre-recorded videos and cuts off original vision signal, reconfiguration to the structural representation of recording, put camera;
Fig. 4 shows the system configuration schematic diagram that monitor video is replaced that prevents according to the embodiment of the present invention one;
Fig. 5 shows the system configuration schematic diagram that monitor video is replaced that prevents according to the embodiment of the present invention two;
Fig. 6 shows the system configuration schematic diagram that monitor video is replaced that prevents according to the embodiment of the present invention three;
Fig. 7 shows the flow chart that prevents the method that monitor video is replaced according to the embodiment of the present invention four.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Embodiment mono-
Fig. 4 shows the system configuration schematic diagram that monitor video is replaced that prevents according to the embodiment of the present invention one; As shown in Figure 4, this system comprises: video camera 10, light emitting module 20, control module 30 and monitor terminal 40, wherein,
Video camera 10, for taking the scene that needs monitoring;
Light emitting module 20, is arranged in the scene of video camera shooting;
Light emitting module 20 is one or more in controlled LED luminous tube, some LASER Discharge Tube, generating laser, shot-light, light-emitting nixie tube or liquid crystal display screen, and concrete mounting means is as follows:
1. a controlled LED luminous tube is installed in video camera coverage, if shooting function receives infrared signal, can be selected infrared LED;
2. on video camera, bind a low power some LASER Discharge Tube, make impact point in the coverage of video camera;
3. can in video camera coverage, arrange a plurality of luminous points, increase transmission speed and the complexity of data, prevent from being cracked;
4. can adopt with alternative luminous points such as the variable generating laser of pattern, shot-light, light-emitting nixie tube or liquid crystal display screens;
5. can adopt the mode transmission information that changes luminous point color;
6. said method can be mixed and uses.
Control module 30, is connected with light emitting module 20, whether luminous controls light emitting module for generation of control signal;
Monitor terminal 40, for reading the brightness of the pixel that the vision signal light emitting module of shot by camera is corresponding and its binaryzation being obtained to serialized data, and serialized data is carried out to verification, if checking data is incorrect, can judge that monitor video signal is replaced in transmitting procedure.
Wherein, in reading the captured vision signal of video camera 10, before the brightness of the pixel of light emitting module 20 correspondences, need the position of the pixel of definite light emitting module 20 correspondences, comprising:
When video camera 10 is fixing, light emitting module 20 is fixedly time, gather the luminous and non-luminous two width images of light emitting module 20 and carry out subtracting computing and carrying out binary conversion treatment according to pixels, read the image pixel after processing, the position when reading pixel value and be 1 is the pixel position of light emitting module 20 correspondences; During practical application, as long as take out the value of this pixel, can carry out calculation process, if adopt color marking, the color value that reads correspondence image pixel carries out calculation process.
When video camera 10 motion, light emitting module 20 are fixedly time, light emitting module 20 is fixed, shooting picture, intercepting light emitting module 20 image is around as the foundation of identification contrast, according to the shape of light emitting module 20 object around, obtain the position of light emitting module 20, read the pixel value corresponding with light emitting module 20..In order to improve the accuracy of identification, different angles when the various photoenvironments in the time of can first simulating actual use and camera motion are taken, then intercept light emitting module image around as the foundation of identification contrast.
Above-mentioned two kinds of light emitting module fixed forms, except using the luminous point of entity, also adopt generating laser, shot-light or projector to produce the fixing luminous point in position.
Motion mode comprises that the motion of video camera 10 or the motion of light emitting module 20 or the two move simultaneously.The motion of light emitting module 20 mainly refers to that equipment such as adopting generating laser, shot-light or a projector produces a luminous point or pattern.This luminous point or pattern, can be along with the movement of generating laser, shot-light or projector or rotation and change position.The motion of generating laser, shot-light or projector and video camera 10 can be independently, also can link, as long as guarantee that luminous point or pattern are in the shooting orientation of video camera 10.While adopting in this way, can select and be with figuratum generating laser, shot-light or projector, then by the mode of image recognition, determine the position of luminous pattern.The method also can be fixing for video camera 10, in the situation of light emitting module 20 motions, reads luminous point information, can select generating laser, shot-light or the projector of belt variable pattern to produce luminous point or pattern, and different pattern combination represents different numerical value.
In the scene of taking at video camera in embodiments of the invention, a controlled light emitting module is set, at monitor terminal by the brightness of the pixel that in reading vision signal, this light emitting module is corresponding and by its binaryzation, obtain serialized data, these data are carried out to checking treatment, if checking data is incorrect, can judge that monitor video signal is replaced in the process of transmission, trigger alarm signal, even if the video showing on little picture is replaced also and can finds in time, prevent that video is replaced, facilitated the monitoring of staff to video.
Embodiment bis-
Fig. 5 shows the system configuration schematic diagram that monitor video is replaced that prevents according to the embodiment of the present invention two; As shown in Figure 5, control module 30 also comprises: processing unit 302 and transmitting element 304, wherein,
Processing unit 302, for control signal is carried out to data processing, by after the data serializing after processing, then is converted into the luminous time of light emitting module;
For example: send numerical value " 1 ", luminous 100 milliseconds of light emitting module, goes out 50 milliseconds; Send numerical value " 0 ", luminous 50 milliseconds, go out 50 milliseconds;
The restriction of fluorescent lifetime length, according to the frame per second of video, luminous or non-luminous time span should not be less than the length of a frame of video.Length for the frame of video of vision signal of 25 frames is 40 milliseconds, so luminous or non-luminous time span should be greater than 40 milliseconds, get 50 milliseconds proper, for frame per second, at 15 frames or following system, can adopt a plurality of light emitting modules to realize the transmission of data.
In the processing procedure of data, can add date, time, place code, device numbering and random number etc. to carry out calculation process, increase the complexity of data;
Transmitting element 304, for sending to light emitting module 20 by the luminous time.
The control signal that light emitting module 20 receives can be that the in-plant wireless signals such as the signal, WIFI of infrared communication can be also the remote signals such as the mobile network of 2G, 3G, 4G or Ethernet, whether luminously also can directly by external signal, control light emitting module.
Embodiment tri-
Fig. 6 shows the system configuration schematic diagram that monitor video is replaced that prevents according to the embodiment of the present invention three; As shown in Figure 6, monitor terminal 40 also comprises alarm unit 402, for trigger alarm signal when checking data is incorrect.
Embodiment tetra-
Fig. 7 shows the flow chart that prevents the method that monitor video is replaced according to the embodiment of the present invention four; As shown in Figure 7, the method comprises:
Step S701, arranges light emitting module in the scene of taking at video camera;
Step S702, whether control module generation control signal is controlled light emitting module luminous;
Wherein, control module produces control signal and controls whether light emitting module is luminous comprises: control signal is carried out to data processing, by after the data serializing after processing, then be converted into the luminous time of light emitting module;
For example: send numerical value " 1 ", luminous 100 milliseconds of light emitting module, goes out 50 milliseconds; Send numerical value " 0 ", luminous 50 milliseconds, go out 50 milliseconds;
The restriction of fluorescent lifetime length, according to the frame per second of video, luminous or non-luminous time span should not be less than the length of a frame of video.Length for the frame of video of vision signal of 25 frames is 40 milliseconds, so luminous or non-luminous time span should be greater than 40 milliseconds, get 50 milliseconds proper, for frame per second, at 15 frames or following system, can adopt a plurality of light emitting modules to realize the transmission of data.
In the processing procedure of data, can add date, time, place code, device numbering and random number etc. to carry out calculation process, increase the complexity of data;
The luminous time is sent to light emitting module;
The control signal that light emitting module 20 receives can be that the in-plant wireless signals such as the signal, WIFI of infrared communication can be also the remote signals such as the mobile network of 2G, 3G, 4G or Ethernet, whether luminously also can directly by external signal, control light emitting module.
Light emitting module is one or more in controlled LED luminous tube, some LASER Discharge Tube, generating laser, shot-light, light-emitting nixie tube or liquid crystal display screen, and concrete mounting means is as follows:
1. a controlled LED luminous tube is installed in video camera coverage, if shooting function receives infrared signal, can be selected infrared LED;
2. on video camera, bind a low power some LASER Discharge Tube, make impact point in the coverage of video camera;
3. can in video camera coverage, arrange a plurality of luminous points, increase transmission speed and the complexity of data, prevent from being cracked;
4. can adopt with alternative luminous points such as the variable generating laser of pattern, shot-light, light-emitting nixie tube or liquid crystal display screens;
5. can adopt the mode transmission information that changes luminous point color;
6. said method can be mixed and uses.
Step S703, monitor terminal reads the brightness of the pixel that in the vision signal of shot by camera, light emitting module is corresponding and its binaryzation is obtained to serialized data, and serialized data is carried out to verification, if checking data is incorrect, can judge that monitor video signal is replaced in transmitting procedure.
Wherein, before the brightness of the pixel that light emitting module is corresponding in reading the vision signal of shot by camera, also comprise: determine the position of the pixel that light emitting module is corresponding, comprising:
When video camera is fixed, light emitting module is fixedly time, gather the luminous and non-luminous two width images of light emitting module and carry out subtracting computing and carrying out binary conversion treatment according to pixels, read the image pixel after processing, the position when reading pixel value and be 1 is the pixel position of light emitting module 20 correspondences; During practical application, as long as take out the value of this pixel, can carry out calculation process, if adopt color marking, the color value that reads correspondence image pixel carries out calculation process.
When camera motion, light emitting module are fixedly time, light emitting module is fixed to shooting picture, intercepting light emitting module image is around as the foundation of identification contrast, according to the shape of light emitting module object around, the position that obtains light emitting module, reads the pixel value corresponding with light emitting module..In order to improve the accuracy of identification, different angles when the various photoenvironments in the time of can first simulating actual use and camera motion are taken, then intercept light emitting module image around as the foundation of identification contrast.
Above-mentioned two kinds of light emitting module fixed forms, except using the luminous point of entity, also adopt generating laser, shot-light or projector to produce the fixing luminous point in position.
Motion mode comprises that the motion of video camera or the motion of light emitting module or the two move simultaneously.The motion of light emitting module mainly refers to that equipment such as adopting generating laser, shot-light or a projector produces a luminous point or pattern.This luminous point or pattern, can be along with the movement of generating laser, shot-light or projector or rotation and change position.The motion of generating laser, shot-light or projector and video camera can be independently, also can link, as long as guarantee that luminous point or pattern are in the shooting orientation of video camera.While adopting in this way, can select and be with figuratum generating laser, shot-light or projector, then by the mode of image recognition, determine the position of luminous pattern.The method also can be fixed for video camera, in the situation of light emitting module motion, reads luminous point information, can select generating laser, shot-light or the projector of belt variable pattern to produce luminous point or pattern, and different pattern combination represents different numerical value.
When checking data is incorrect, monitor terminal trigger alarm signal.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
In the scene of taking at video camera, a controlled light emitting module is set, at monitor terminal by the brightness of the pixel that in reading vision signal, this light emitting module is corresponding and by its binaryzation, obtain serialized data, these data are carried out to checking treatment, if checking data is incorrect, can judge that monitor video signal is replaced in the process of transmission, trigger alarm signal, even if the video showing on little picture is replaced also and can finds in time, prevent that video is replaced, facilitated the monitoring of staff to video.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. prevent the system that monitor video is replaced, it is characterized in that, comprising: video camera, light emitting module, control module and monitor terminal, wherein,
Described video camera, for taking the scene that needs monitoring;
Described light emitting module, is arranged in the scene of described video camera shooting;
Described control module, is connected with described light emitting module, whether luminous controls described light emitting module for generation of control signal;
Described monitor terminal, for reading the brightness of the pixel that described in the vision signal of described shot by camera, light emitting module is corresponding and its binaryzation being obtained to serialized data, and described serialized data is carried out to verification, if checking data is incorrect, can judge that monitor video signal is replaced in transmitting procedure.
2. the system that prevents that monitor video is replaced according to claim 1, is characterized in that, described control module also comprises: processing unit and transmitting element, wherein,
Described processing unit, for described control signal is carried out to data processing, by after the data serializing after processing, then is converted into the luminous time of described light emitting module;
Described transmitting element, for sending to described light emitting module by the described luminous time.
3. the system that prevents that monitor video is replaced according to claim 1, is characterized in that, described light emitting module is one or more in controlled LED luminous tube, some LASER Discharge Tube, generating laser, shot-light, light-emitting nixie tube or liquid crystal display screen.
4. the system that prevents that monitor video is replaced according to claim 1, it is characterized in that, the position of the pixel that needed to determine that described light emitting module is corresponding before the brightness of the pixel that described in the described vision signal that reads described shot by camera, light emitting module is corresponding, comprising:
When described video camera is fixed, described light emitting module is fixedly time, gather the luminous and non-luminous two width images of described light emitting module and carry out subtracting computing and carrying out binary conversion treatment according to pixels, read the image pixel after processing, the position when reading pixel value and be 1 is the pixel position that described light emitting module is corresponding;
When described camera motion, described light emitting module are fixedly time, described light emitting module is fixed, shooting picture, intercept described light emitting module image around as the contrast foundation of identification, according to the shape of described light emitting module object around, obtain the position of described light emitting module, read the pixel value corresponding with described light emitting module.
5. the system that prevents that monitor video is replaced according to claim 1, is characterized in that, described monitor terminal also comprises alarm unit, for trigger alarm signal when described checking data is incorrect.
6. prevent the method that monitor video is replaced, it is characterized in that, comprising:
In the scene of taking at video camera, light emitting module is set;
Whether control module generation control signal is controlled described light emitting module luminous;
Monitor terminal reads the brightness of the pixel that described in the vision signal of described shot by camera, light emitting module is corresponding and its binaryzation is obtained to serialized data, and described serialized data is carried out to verification, if checking data is incorrect, can judge that monitor video signal is replaced in transmitting procedure.
7. the method that prevents that monitor video is replaced according to claim 6, is characterized in that, described control module produces control signal and controls whether described light emitting module is luminous comprises:
Described control signal is carried out to data processing, by after the data serializing after processing, then be converted into the luminous time of described light emitting module;
The described luminous time is sent to described light emitting module.
8. the method that prevents that monitor video is replaced according to claim 6, is characterized in that, described light emitting module is one or more in controlled LED luminous tube, some LASER Discharge Tube, generating laser, shot-light, light-emitting nixie tube or liquid crystal display screen.
9. the method that prevents that monitor video is replaced according to claim 6, it is characterized in that, before the brightness of the pixel that described in the described vision signal that reads described shot by camera, light emitting module is corresponding, also comprise: determine the position of the pixel that described light emitting module is corresponding, comprising:
When described video camera is fixed, described light emitting module is fixedly time, gather the luminous and non-luminous two width images of described light emitting module and carry out subtracting computing and carrying out binary conversion treatment according to pixels, read the image pixel after processing, the position when reading pixel value and be 1 is the pixel position that described light emitting module is corresponding;
When described camera motion, described light emitting module are fixedly time, described light emitting module is fixed, shooting picture, intercept described light emitting module image around as the contrast foundation of identification, according to the shape of described light emitting module object around, obtain the position of described light emitting module, read the pixel value corresponding with described light emitting module.
10. the method that prevents that monitor video is replaced according to claim 6, is characterized in that, when described checking data is incorrect, and described monitor terminal trigger alarm signal.
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