CN111601105A - Video display state abnormity detection method and device and electronic equipment - Google Patents
Video display state abnormity detection method and device and electronic equipment Download PDFInfo
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Abstract
The invention discloses a video display state abnormity detection method, a video display state abnormity detection device and electronic equipment, wherein the video display state abnormity detection method comprises the following steps: when a video monitoring starting signal is received, acquiring a first video image currently displayed by a video player, and storing the first video image into a database as a reference video image; when the target interval time is reached, acquiring a second video image currently displayed by the video player as a target video image; and determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image. Compared with the prior art that the abnormal display state of the video player is determined by detecting the playing state, the abnormal display state is determined by comparing the pixel changes of the two video images at the target interval time, the accuracy of the detection result of the abnormal display state is improved, the misjudgment condition is reduced, and the problem that the video watching effect is influenced because the abnormal display state is not detected in time is avoided.
Description
Technical Field
The invention relates to the technical field of video detection, in particular to a method and a device for detecting video display state abnormity and electronic equipment.
Background
With the development of economy, efficient and convenient life styles are increasingly pursued by people, and subways are rapidly developed in such an atmosphere. The subway can be stably constructed and operated safely and efficiently, and all subsystems of the subway need to play respective roles. The vehicle-mounted video monitoring subsystem can monitor and record real-time images inside the running subway carriage, so that a subway company and a subway safety monitoring department can timely master the conditions in a passenger room and timely carry out operation management and public security and precaution on the subway, and the vehicle-mounted video monitoring subsystem plays a vital role in the safe running process of the subway.
The vehicle-mounted video monitoring subsystem collects and records passenger riding conditions through cameras installed in all carriages and displays the passenger riding conditions on a display screen of a video player of a driver cab in real time, so that a driver can inquire and operate to view real-time pictures in all carriages through monitoring the display screen. The current vehicle-mounted video monitoring subsystem adopts software decoding, and the phenomenon of screen blacking or screen blocking and the like of a played real-time picture can be caused with a certain probability.
Therefore, the existing free and open-source player based on the VLC framework can detect the video data stream to determine the state of the current player while playing the real-time picture, and if the current player is not in the playing state, the current player is considered to be in a black screen or a stuck screen, and then the player is restarted. However, the state of the black screen or the card screen is determined by detecting the playing state of the current player, so that misdetermination is easy to occur, namely, when the black screen or the card screen exists, the player can be in the playing state.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect of high false rate of the existing video player display state anomaly detection method, so as to provide a video display state anomaly detection method, a video display state anomaly detection device and an electronic device.
According to a first aspect, an embodiment of the present invention discloses a video display state anomaly detection method, including: when a video monitoring starting signal is received, acquiring a first video image currently displayed by a video player, and storing the first video image into a database as a reference video image; when the target interval time is reached, acquiring a second video image currently displayed by the video player as a target video image; and determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image.
Optionally, the determining whether the display state of the video player is abnormal according to the pixel comparison result between the target video image and the reference video image includes: and when the pixels of the target video image are all black pixels and the pixels of the reference video image are not uniform to be black pixels, determining that the display state of the video player is abnormal.
Optionally, the determining whether the display state of the video player is abnormal according to the pixel comparison result between the target video image and the reference video image includes: and when the pixels in the target video image are the same as the pixels in the reference video image, determining that the display state of the video player is abnormal.
Optionally, the method further comprises: when the display state of the video player is not abnormal, storing the target video image into the database as a new reference video image, and deleting the reference video image stored last time in the database; and repeating the step of obtaining a second video image displayed by the video player when the target interval time is reached, and determining whether the display state of the video player is abnormal or not as the target video image to the step of determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image until a video monitoring closing signal is received.
Optionally, the method further comprises: and when the display state of the video player is abnormal, restarting the video player and triggering to generate a video monitoring starting signal.
Optionally, the method further comprises: when the video players comprise a plurality of video players, writing an abnormal result of the video player with abnormal display state into a target file, wherein the abnormal result comprises a video player abnormal reason and a corresponding video player identifier; analyzing the content stored in the target file; and restarting the video player meeting the restarting condition and triggering to generate a video monitoring starting signal according to the analysis result.
According to a second aspect, an embodiment of the present invention discloses a video display state anomaly detection apparatus, including: the video monitoring system comprises a first acquisition module, a second acquisition module and a video monitoring module, wherein the first acquisition module is used for acquiring a first video image currently displayed by a video player when a video monitoring starting signal is received, and storing the first video image into a database as a reference video image; the second acquisition module is used for acquiring a second video image currently displayed by the video player as a target video image when the target interval time is reached; and the determining module is used for determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image.
Optionally, the method further comprises: the first processing module is used for storing the target video image into the database as a new reference video image when the display state of the video player is not abnormal, and deleting the reference video image stored last time in the database; and the second processing module is used for repeating the step of obtaining a second video image displayed by the video player when the target interval time is reached, and determining whether the display state of the video player is abnormal or not as a target video image to the step of determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image until a video monitoring closing signal is received.
According to a third aspect, an embodiment of the present invention discloses an electronic device, including: a processor, a memory and a computer program stored on the memory and operable on the processor, wherein the processor, when executing the program, implements the steps of the video display state anomaly detection method according to any one of the first aspect and the optional embodiments of the first aspect.
According to a fourth aspect, an embodiment of the present invention discloses a readable computer storage medium, on which computer instructions are stored, and the computer instructions, when executed by a processor, implement the steps of the video display state anomaly detection method described in any one of the optional implementation manners of the first aspect and the first aspect.
The technical scheme provided by the embodiment of the invention has the following advantages:
according to the video display state anomaly detection method, the video display state anomaly detection device and the electronic equipment, when a video monitoring starting signal is received, a first video image currently displayed by a video player is obtained, the first video image is stored in a database to serve as a reference video image, a second video image currently displayed by the video player is obtained when a target interval time is reached and serves as a target video image, the target video image and the reference video image are compared, and whether the display state of the video player is abnormal or not is determined according to a pixel comparison result of the target video image and the reference video image. Compared with the prior art that the abnormal display state of the video player is determined by detecting the playing state, the abnormal display state is determined by comparing the pixel changes of the two video images at the target interval time, the accuracy of the detection result of the abnormal display state is improved, the misjudgment condition is reduced, and the problem that the video watching effect is influenced because the abnormal display state is not detected in time is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a video display state anomaly detection method according to embodiment 1 of the present invention;
fig. 2 is a block diagram of an apparatus for detecting an abnormal video display state according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to embodiment 3 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
An embodiment of the present application provides a method for detecting an abnormal video display state, as shown in fig. 1, the method for detecting an abnormal video display state includes:
Illustratively, when the vehicle-mounted video monitoring subsystem is started, a camera installed in a carriage transmits acquired video images to a video player of a cab for display, the triggering mode of the video monitoring starting signal can be that after the vehicle-mounted video monitoring subsystem on a subway is started through a master control switch, the camera and the video player in the vehicle-mounted video monitoring subsystem are synchronously started, when the video player is started, the video monitoring starting signal is triggered to be generated, at the moment, the video player receives the video images acquired by the front-end camera and displays the first video images on a display screen, and the first video images are stored in a database and serve as reference video images.
The number of the video players included in the vehicle-mounted video monitoring subsystem is not limited, and when the number of the video players includes a plurality of video players, the first video image currently displayed by each video player can be respectively acquired, and the first video image is stored in the database. In order to distinguish which video player the plurality of first video images belong to, a plurality of arrays can be established, and the arrays are respectively used for storing the first video images displayed by different video image players.
And 102, acquiring a second video image currently displayed by the video player as a target video image when the target interval time is reached.
For example, the target interval time may be in the order of minutes or seconds, and the target interval time is not limited in the embodiment of the present application, and a person skilled in the art may determine according to the subway security level or the error rate of software decoding of the vehicle-mounted video monitoring subsystem, and when the subway security level is higher or the error rate of software decoding is higher, the target interval time may be reduced to increase the frequency of detecting the video display state abnormality, so that the abnormal display state may be detected in time. The target interval time in the embodiment of the present application is 10 s. The acquired second video image may be stored in a folder.
For example, the manner of comparing the pixels of the target video image with the pixels of the reference video image may be to compare the pixels of the two video images one by one according to a coordinate system of the pixels in the video images in a certain order, so as to obtain a pixel comparison result, and then determine whether the display state of the video player is abnormal according to the pixel comparison result. For example, when the similarity between the target video image and the reference video image obtained according to the video comparison result reaches a certain ratio, the display state of the current video player can be determined to be the screen-locked state, the ratio is not limited in the embodiment of the present application, and if the similarity between the target video image and the reference video image reaches more than 90%, the display state of the current video player can be determined to be the screen-locked state. The pixel comparison can be realized by adopting an OpenCV technology, and the embodiment of the application does not limit the pixel comparison mode.
As an alternative embodiment of the present application, step 103 includes: and when the pixels of the target video image are all black pixels and the pixels of the reference video image are not uniform to be black pixels, determining that the display state of the video player is abnormal.
Illustratively, the condition that the image is not transmitted due to the failure of the camera can be further prevented from being mistaken as the black screen of the video player by combining the pixels of the reference video image and comparing the pixels of the target video image to determine the black screen phenomenon. When the video monitoring function is started, the image collected by the normal camera can be normally displayed in the video player after being coded and decoded, if the camera fails, the image can not be naturally transmitted back, then the video player can not display any image naturally, and if the camera fails for a long time, the target video image obtained by the video player which displays the image of the camera in the target interval time is still a black screen image under the condition that the video player is not closed. The black screen misjudgment can be avoided by taking the black pixels as the black screen judgment conditions, wherein the pixels of the target video image are all black pixels, and the pixels of the reference video image are uneven to be the black pixels.
As an alternative embodiment of the present application, step 103 includes: and when the pixels in the target video image are the same as the pixels in the reference video image, determining that the display state of the video player is abnormal.
Illustratively, when the target interval time is short, the obtained target video image and the reference video image may not change much, and in order to avoid the problem that the video player is restarted by mistake due to misjudgment of the screen jam phenomenon and the viewing effect of the video player is poor, the abnormal screen jam state is determined by the condition that the pixels of the target video image are completely the same as the pixels of the reference video image, so that the accurate determination of the restart of the video player is realized, the screen jam problem is solved, and the viewing effect is improved.
As an optional embodiment of the present application, the method further comprises: when the display state of the video player is not abnormal, storing the target video image into the database as a new reference video image, and deleting the reference video image stored last time in the database; and repeating the step of obtaining a second video image displayed by the video player when the target interval time is reached, and determining whether the display state of the video player is abnormal or not as the target video image to the step of determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image until a video monitoring closing signal is received.
And when the target video image and the reference video image are compared at the target interval time, judging that the display state of the video player is not abnormal, storing the obtained target video image as a new reference video image into a database for repeatedly comparing a comparison object of the new target video image obtained at the next target interval time so as to detect the display state of the video player, and closing the video monitoring function until a video monitoring closing signal is received.
As an optional embodiment of the present application, the method further comprises: and when the display state of the video player is abnormal, restarting the video player and triggering to generate a video monitoring starting signal.
Illustratively, when the display state of the current video player is judged to be abnormal by comparing the target video image with the reference video image, the video player is restarted to overcome the problem of abnormal display, a video monitoring starting signal is generated in the restarting process, the reference video image is acquired again in the restarted video player, and the abnormal detection of the display state of the restarted video player is completed according to the steps, so that the whole-process detection of the video monitoring process is achieved, and the stability of the display state of the video player in the video monitoring process and the real-time performance and accuracy of the display result are ensured.
As an optional embodiment of the present application, the method further comprises:
when the video players comprise a plurality of video players, writing an abnormal result of the video player with abnormal display state into a target file, wherein the abnormal result comprises a video player abnormal reason and a corresponding video player identifier; analyzing the content stored in the target file; and restarting the video player meeting the restarting condition and triggering to generate a video monitoring starting signal according to the analysis result.
For example, the number of video players may be determined according to the number of front-end cameras, or may also be determined according to the importance level of the video image returned by the front end, and the video image with the higher importance level is preferentially displayed, and the number of video players is not limited in the embodiment of the present application. When the number of the video players is multiple, after the method is adopted to determine that each video display state is abnormal, the abnormal result of the video player with the abnormal display state can be written into the target file. The target file may be a document file in which the video player exception cause and the corresponding video player identification are written, for example, writing "1-black" in a document named "error.txt"; 2-freqen ", after analyzing the document content, the current black screen phenomenon of the video player 1 and the screen blocking phenomenon of the video player 2 can be obtained. And if the abnormal display state is not found, deleting the target file.
The restart condition may be whether the video player has a display state abnormality (such as a black screen or a card screen), and when it is found that the video player satisfies the restart condition according to the analysis result, the corresponding video player is restarted and a video monitoring start signal is triggered to be generated to perform display state abnormality detection again on the restarted video player. For example, if it is detected that the video player 1 and the video player 2 in the four players satisfy the restart condition, the video player 1 and the video player 2 are restarted to overcome the abnormal display problem.
Example 2
An embodiment of the present application further provides a video display state anomaly detection apparatus, as shown in fig. 2, including:
a first obtaining module 201, configured to obtain a first video image currently displayed by a video player when a video monitoring start signal is received, and store the first video image in a database as a reference video image;
a second obtaining module 202, configured to obtain, as a target video image, a second video image currently displayed by the video player when a target interval is reached;
a determining module 203, configured to determine whether a display state of the video player is abnormal according to a pixel comparison result between the target video image and the reference video image.
According to the video display state abnormity detection device provided by the embodiment of the application, when a video monitoring starting signal is received, a first video image currently displayed by a video player is obtained, the first video image is stored in a database to be used as a reference video image, a second video image currently displayed by the video player is obtained when a target interval time is reached and is used as a target video image, the target video image and the reference video image are compared, and whether the display state of the video player is abnormal or not is determined according to a pixel comparison result of the target video image and the reference video image. Compared with the prior art that the abnormal display state of the video player is determined by detecting the playing state, the abnormal display state is determined by comparing the pixel changes of the two video images at the target interval time, the accuracy of the detection result of the abnormal display state is improved, the misjudgment condition is reduced, and the problem that the video watching effect is influenced because the abnormal display state is not detected in time is avoided.
As an optional implementation manner of this application, the determining module 203 includes a first determining module, configured to determine that the display state of the video player is abnormal when all the pixels of the target video image are black pixels and the pixel unevenness of the reference video image is a black pixel.
As an optional implementation manner of this application, the determining module 203 includes a second determining module, configured to determine that the display state of the video player is abnormal when the pixels in the target video image are the same as the pixels in the reference video image.
As an optional embodiment of the present application, the method further includes: the first processing module is used for storing the target video image into the database as a new reference video image when the display state of the video player is not abnormal, and deleting the reference video image stored last time in the database; and the second processing module is used for repeating the step of obtaining a second video image displayed by the video player when the target interval time is reached, and determining whether the display state of the video player is abnormal or not as a target video image to the step of determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image until a video monitoring closing signal is received.
As an optional embodiment of the present application, the method further includes: and the third processing module is used for restarting the video player and triggering to generate a video monitoring starting signal when the display state of the video player is abnormal.
As an optional embodiment of the present application, the method further includes: the writing module is used for writing an abnormal result of the video player with abnormal display state into a target file when the video players comprise a plurality of video players, wherein the abnormal result comprises a video player abnormal reason and a corresponding video player identifier; the analysis module is used for analyzing the content stored in the target file; and the restarting module is used for restarting the video player meeting the restarting condition and triggering to generate a video monitoring starting signal according to the analysis result.
Example 3
An embodiment of the present application further provides an electronic device, as shown in fig. 3, the electronic device includes: a processor 301, a memory 302, and a computer program stored in the memory 302 and capable of running on the processor 301, wherein the processor 301 and the memory 302 may be connected by a bus or other means, and fig. 3 may be taken as an example of the connection by the bus, when the processor 301 executes the program, the steps of the video display state abnormality detection method described in the above embodiments are implemented.
The memory 302 is a non-transitory computer readable storage medium, and can be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the video display state anomaly detection method in the embodiment of the present invention. The processor 301 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 302, that is, implements the video display state anomaly detection method in the above method embodiment.
The memory 302 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 301, and the like. Further, the memory 302 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 302 may optionally include memory located remotely from the processor 301, which may be connected to the processor 301 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 302 and, when executed by the processor 301, perform a video display state anomaly detection method as in the embodiment of fig. 1.
The details of the electronic device may be understood with reference to the corresponding related description and effects in the embodiment shown in fig. 1, and are not described herein again.
Example 4
The embodiment of the invention also provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the video display state abnormity detection method in any method embodiment. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard disk (Hard disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A video display state anomaly detection method is characterized by comprising the following steps:
when a video monitoring starting signal is received, acquiring a first video image currently displayed by a video player, and storing the first video image into a database as a reference video image;
when the target interval time is reached, acquiring a second video image currently displayed by the video player as a target video image;
and determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image.
2. The method according to claim 1, wherein the determining whether the display status of the video player is abnormal according to the pixel comparison result between the target video image and the reference video image comprises:
and when the pixels of the target video image are all black pixels and the pixels of the reference video image are not uniform to be black pixels, determining that the display state of the video player is abnormal.
3. The method according to claim 1, wherein the determining whether the display status of the video player is abnormal according to the pixel comparison result between the target video image and the reference video image comprises:
and when the pixels in the target video image are the same as the pixels in the reference video image, determining that the display state of the video player is abnormal.
4. The method according to any one of claims 1-3, further comprising:
when the display state of the video player is not abnormal, storing the target video image into the database as a new reference video image, and deleting the reference video image stored last time in the database;
and repeating the step of obtaining a second video image displayed by the video player when the target interval time is reached, and determining whether the display state of the video player is abnormal or not as the target video image to the step of determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image until a video monitoring closing signal is received.
5. The method according to any one of claims 1-3, further comprising: and when the display state of the video player is abnormal, restarting the video player and triggering to generate a video monitoring starting signal.
6. The method of claim 5, further comprising:
when the video players comprise a plurality of video players, writing an abnormal result of the video player with abnormal display state into a target file, wherein the abnormal result comprises a video player abnormal reason and a corresponding video player identifier;
analyzing the content stored in the target file;
and restarting the video player meeting the restarting condition and triggering to generate a video monitoring starting signal according to the analysis result.
7. An apparatus for detecting abnormality in video display state, comprising:
the video monitoring system comprises a first acquisition module, a second acquisition module and a video monitoring module, wherein the first acquisition module is used for acquiring a first video image currently displayed by a video player when a video monitoring starting signal is received, and storing the first video image into a database as a reference video image;
the second acquisition module is used for acquiring a second video image currently displayed by the video player as a target video image when the target interval time is reached;
and the determining module is used for determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image.
8. The apparatus of claim 7, further comprising:
the first processing module is used for storing the target video image into the database as a new reference video image when the display state of the video player is not abnormal, and deleting the reference video image stored last time in the database;
and the second processing module is used for repeating the step of obtaining a second video image displayed by the video player when the target interval time is reached, and determining whether the display state of the video player is abnormal or not as a target video image to the step of determining whether the display state of the video player is abnormal or not according to the pixel comparison result of the target video image and the reference video image until a video monitoring closing signal is received.
9. An electronic device, comprising: a processor, a memory and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the video display state anomaly detection method according to any one of claims 1-6 when executing the program.
10. A readable computer storage medium having stored thereon computer instructions, which when executed by a processor, carry out the steps of the video display state anomaly detection method according to any one of claims 1-6.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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