CN114827593A - Video detection method, device and equipment based on vehicle-mounted display screen and storage medium - Google Patents
Video detection method, device and equipment based on vehicle-mounted display screen and storage medium Download PDFInfo
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Abstract
The invention belongs to the technical field of electronic equipment, and discloses a video detection method, a video detection device, video detection equipment and a storage medium based on a vehicle-mounted display screen. The method comprises the following steps: when a video signal has a potential abnormal trend, obtaining abnormal state information according to the difference information of video frames in the video signal; when the abnormal state information accords with preset video frame abnormal information, determining that the video frame of the video signal is abnormal; when the video frame is abnormal, updating the continuous abnormal times; and when the continuous abnormal times are larger than or equal to a preset threshold value, determining that the video signal is in an abnormal state. By the mode, the abnormal state information is obtained according to the difference information of the video frames in the video signal, the video signal condition is judged through the abnormal state information, when the video signal is in the abnormal state, the abnormal state can be quickly and effectively identified, the abnormal processing efficiency is improved, and the driving safety is ensured.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a video detection method, a video detection device, video detection equipment and a storage medium based on a vehicle-mounted display screen.
Background
The display is one of the most important functions of the car machine, the vehicle-mounted display screen is the external embodiment of the vision and touch of the car machine, and along with the rapid development of the car technology, the functions of the vehicle-mounted display screen are more and more comprehensive, such as a central control screen, an instrument screen, a streaming media rearview mirror and the like. Especially on-vehicle instrument display screen compares in traditional mechanical instrument, can show more nimble vehicle information, receives more and more user's attention.
The vehicle-mounted display screen is generally composed of a microcontroller, a deserializer and a liquid crystal display screen, wherein the host outputs video data, and the videos are displayed on the liquid crystal display screen through the deserializer. At present, a microcontroller of a vehicle-mounted display screen only supplies power to a deserializer and a liquid crystal display screen according to the requirements of specification, so that the normal work of the microcontroller is ensured, the video state is not checked, whether the video state is normal or not needs to be confirmed through a host, the video state cannot be rapidly judged when abnormal occurs, the processing efficiency is influenced, and the driving safety is influenced.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a video detection method, a video detection device, video detection equipment and a storage medium based on a vehicle-mounted display screen, and aims to solve the technical problems that in the prior art, when the video state of the vehicle-mounted display screen is abnormal, the vehicle-mounted display screen cannot be quickly judged, the processing efficiency is influenced, and the driving safety is influenced.
In order to achieve the purpose, the invention provides a video detection method based on a vehicle-mounted display screen, which comprises the following steps:
when a video signal has a potential abnormal trend, obtaining abnormal state information according to the difference information of video frames in the video signal;
when the abnormal state information accords with preset video frame abnormal information, determining that the video frame of the video signal is abnormal;
when the video frame is abnormal, updating the continuous abnormal times;
and when the continuous abnormal times are larger than or equal to a preset threshold value, determining that the video signal is in an abnormal state.
Optionally, when there is a potential abnormal trend in the video signal, obtaining abnormal state information according to difference information of video frames in the video signal, including:
when a video signal has a potential abnormal trend, acquiring color channel data of a video frame in the video signal;
obtaining difference information of the video frame according to the color channel data of the video frame;
and obtaining the abnormal state information according to the difference information.
Optionally, before acquiring color channel data of a video frame in a video signal when the video signal has a potential abnormal trend, the method further includes:
acquiring initial color channel data of a video frame in a video signal;
and modifying the initial color channel data according to a preset modification range to generate the color channel data of the video frame, wherein the preset modification range comprises a preset color channel, a preset modification position and a preset modification quantity.
Optionally, before obtaining the abnormal state information according to the difference information of the video frames in the video signal when the video signal has a potential abnormal trend, the method further includes:
acquiring a video state of the video signal;
and when the video state accords with a preset abnormal state, determining that the video signal has a potential abnormal trend.
Optionally, after updating the number of consecutive exceptions when there is an exception in the video frame, the method further includes:
and when the continuous abnormal times are smaller than a preset threshold value, the abnormal state information is cleared, and when the video signal has a potential abnormal trend, the abnormal state information is obtained according to the difference information of the video frames in the video signal.
Optionally, when the number of consecutive abnormal times is greater than or equal to a preset threshold, after determining that the video signal is in an abnormal state, the method further includes:
and sending the abnormal state information to a host computer so that the host computer processes the video signal according to the abnormal state information.
Optionally, the video detection method based on the vehicle-mounted display screen further includes:
when the video signal is in an abnormal state, acquiring abnormal time;
when the abnormal time is greater than the preset recovery time, confirming that the video display cannot be recovered;
and acquiring a preset warning picture, and outputting the preset warning picture.
In addition, in order to achieve the above object, the present invention further provides a video detection device based on a vehicle-mounted display screen, including:
the judging module is used for obtaining abnormal state information according to the difference information of video frames in the video signals when the video signals have potential abnormal trends;
the judging module is further configured to determine that a video frame of the video signal is abnormal when the abnormal state information conforms to preset video frame abnormal information;
the updating module is used for updating the continuous abnormal times when the video frames are abnormal;
the judging module is further configured to determine that the video signal is in an abnormal state when the consecutive abnormal times is greater than or equal to a preset threshold.
In addition, in order to achieve the above object, the present invention further provides a video detection device based on a vehicle-mounted display screen, including: the device comprises a memory, a processor and a vehicle-mounted display screen-based video detection program stored on the memory and capable of running on the processor, wherein the vehicle-mounted display screen-based video detection program is configured to realize the steps of the vehicle-mounted display screen-based video detection method.
In addition, to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores a video detection program based on a vehicle-mounted display screen, and the video detection program based on the vehicle-mounted display screen realizes the steps of the video detection method based on the vehicle-mounted display screen when being executed by a processor.
In the invention, when a video signal has a potential abnormal trend, abnormal state information is obtained according to difference information of video frames in the video signal, when the abnormal state information accords with preset video frame abnormal information, the video frame of the video signal is judged to have abnormality, continuous abnormal times are updated, and when the continuous abnormal times are greater than a preset threshold value, the video signal is judged to be in an abnormal state. Compared with the prior art that whether the video state is normal or not needs to be confirmed through the host, the abnormal state information can be acquired through the microcontroller of the vehicle-mounted display screen without judging through the host, and the state of the video signal is judged, so that the technical problem that the driving safety is affected because the abnormal state of the video state cannot be judged quickly is solved, the vehicle-mounted display screen can quickly and effectively identify when the video signal is in the abnormal state, the abnormal processing efficiency is improved, and the driving safety is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a vehicle-mounted display screen-based video detection device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a video detection method based on a vehicle-mounted display screen according to the present invention;
FIG. 3 is a schematic diagram of an overall operating hardware environment of an embodiment of a video detection method based on a vehicle-mounted display screen according to the present invention;
FIG. 4 is a schematic flow chart of a second embodiment of a video detection method based on a vehicle-mounted display screen according to the present invention;
FIG. 5 is a schematic flow chart of a video detection method based on a vehicle-mounted display screen according to a third embodiment of the present invention;
FIG. 6 is a schematic overall flow chart of video anomaly detection according to an embodiment of the video detection method based on the vehicle-mounted display screen;
fig. 7 is a block diagram of a first embodiment of a video detection device based on a vehicle-mounted display screen according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a video detection device based on a vehicle-mounted display screen in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the video detection device based on the vehicle-mounted display screen may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of an in-vehicle display screen based video detection device, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a video detection program based on an in-vehicle display screen.
In the video detection device based on the vehicle-mounted display screen shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the video detection device based on the vehicle-mounted display screen can be arranged in the video detection device based on the vehicle-mounted display screen, and the video detection device based on the vehicle-mounted display screen calls the video detection program based on the vehicle-mounted display screen stored in the memory 1005 through the processor 1001 and executes the video detection method based on the vehicle-mounted display screen provided by the embodiment of the invention.
Based on the hardware structure, the embodiment of the video detection method based on the vehicle-mounted display screen is provided.
An embodiment of the present invention provides a video detection method based on a vehicle-mounted display screen, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of a video detection method based on a vehicle-mounted display screen according to the present invention.
In this embodiment, the video detection method based on the vehicle-mounted display screen includes the following steps:
step S10: and when the video signal has a potential abnormal trend, obtaining abnormal state information according to the difference information of the video frames in the video signal.
It should be noted that the execution main body of this embodiment is a vehicle-mounted display screen, and may be composed of a microcontroller, a deserializer, and a liquid crystal display screen, and may further include other components, for example: the present embodiment does not limit this. As shown in the schematic diagram of the overall operating hardware environment shown in fig. 3, the host outputs a video signal to the on-board display, the on-board display receives the video signal through the deserializer and displays the video signal on the liquid crystal display, and the deserializer and the liquid crystal display are powered by the microcontroller.
It can be understood that the potential abnormal trend of the video signal, that is, the possibility of the video signal being abnormal, is judged according to the video state, and includes: and acquiring the video state of the video signal, and determining that the video signal has a potential abnormal trend when the video state accords with a preset abnormal state. The video states include a transmission state between the deserializer and the host and a display state of a video in the liquid crystal display, for example: the present embodiment does not limit this to normal transmission between the deserializer and the host, transmission interruption between the deserializer and the host, normal video display, and the like, where the transmission state between the deserializer and the host is determined by the deserializer, and the display state of the video in the liquid crystal display is determined by the liquid crystal display. The preset abnormal state is a state in which the video signal may be abnormal, and includes video signal abnormal states such as video signal transmission abnormality and video signal display abnormality, for example: the video signal transmission is interrupted, the video signal display is stuck, and the setting can be performed in the video detection program based on the vehicle-mounted display screen, which is not limited in this embodiment.
It should be understood that the difference information of the video frames, i.e., the difference between the video frames, can be obtained by comparing and analyzing the video frames, and the abnormal state information, i.e., the abnormal situation occurring in the video signal, can be obtained by analyzing the difference information of the video frames, for example: through the contrast analysis among the video frames, if the obtained difference information is that there is no difference between the video frames after the tenth frame, the abnormal state information is that the video frames stop, and through the contrast analysis among the video frames, if the obtained difference information is that there is no difference between the tenth frame and the fifteenth frame and there is no difference between the twentieth frame and the twenty-fifth frame, the abnormal state information is that the video frames are stuck.
In the specific implementation, after the vehicle-mounted display screen is connected with the power supply, the microcontroller initializes and configures the liquid crystal display screen to start the video detection function based on the vehicle-mounted display screen. When the video signal is confirmed to be possibly abnormal, the video frames in the video signal are compared and analyzed to obtain difference information, the difference information is further analyzed, and abnormal state information of the abnormal condition of the recorded video frames can be obtained and used for judging whether the video signal is abnormal or not.
Step S20: and when the abnormal state information accords with the abnormal information of the preset video frame, determining that the video frame is abnormal.
It should be noted that the preset video frame abnormal information is information that an abnormal situation may occur in a video frame, and includes video frame abnormal situation information such as video frame stop information, video frame pause information, and video frame lag information, and is set in a video detection program based on the vehicle-mounted display screen, which is not limited in this embodiment.
In this embodiment, the abnormal state information is analyzed, and when the abnormal state information matches the preset video frame abnormal information, it is determined that the video frame of the video signal is abnormal, and it is determined that the video frame is abnormal.
It should be understood that, the video frame of the video signal is abnormal and does not represent that the video signal is in an abnormal state, for example, during video refresh, the video frame is abnormal, but the video signal cannot be considered to be in an abnormal state at this time, so after the video frame is judged to be abnormal, further analysis is needed to confirm that the video signal is in an abnormal state, and the validity of the judgment is ensured.
Step S30: and updating the continuous abnormal times when the video frames are abnormal.
It can be understood that the number of consecutive anomalies is the number of consecutive video frame anomalies, i.e. the number of consecutive video frame anomalies is determined.
In a specific implementation, the continuous abnormal times are updated when the video frame is abnormal or the video frame is not abnormal, when the video frame is continuously judged to be abnormal, the continuous abnormal times are increased, and when the video frame is not continuously judged to be abnormal, the continuous abnormal times are reset to zero, for example: if the number of consecutive abnormalities is 1, the number of consecutive abnormalities is updated to 2 if it is determined that there is an abnormality in the video frame, and if it is determined that there is no abnormality in the video frame at the next detection, the number of consecutive abnormalities is updated to 0.
Step S40: and when the continuous abnormal times are larger than or equal to a preset threshold value, determining that the video signal is in an abnormal state.
In a specific implementation, the preset threshold may be set in a video detection program based on a vehicle-mounted display screen, for example: the preset threshold value can be set to 10, and other parameters can be set, which is not limited in the embodiment and can be flexibly adjusted according to actual conditions. And when the continuous abnormal times are less than the preset threshold, clearing the abnormal state information, returning to the step of 10, detecting the video signal again until the continuous abnormal times are greater than or equal to the preset threshold, and when the continuous abnormal times are greater than or equal to the preset threshold, judging that the video signal is in an abnormal state.
It can be understood that when the video frame is detected to have an abnormality, but the abnormality is not continuously detected, the video signal is not necessarily in an abnormal state, and there may be an accident, for example: in order to avoid the accidental situations, the present embodiment does not limit the abnormal situations caused by the device performance, the abnormal situations caused by the video refresh, and the like, and the abnormal situations are determined to be abnormal when the number of consecutive abnormal situations is greater than or equal to the preset threshold, so that the contingency of the abnormal situations can be eliminated, and the effectiveness of the determination is further improved.
It should be noted that, when the number of consecutive anomalies is smaller than the preset threshold, the anomaly status information is deleted, so that the next detection can be performed normally, and at the same time, unnecessary information can be deleted, so as to reduce the storage amount and improve the running rate of the video detection program based on the vehicle-mounted display screen.
In the embodiment, when a video signal has a potential abnormal trend, abnormal state information is obtained according to difference information of video frames in the video signal, when the abnormal state information accords with preset video frame abnormal information, the video frame of the video signal is judged to be abnormal, continuous abnormal times are updated, and when the continuous abnormal times are larger than or equal to a preset threshold value, the video signal is judged to be in an abnormal state, so that when the video signal is in the abnormal state, a vehicle-mounted display screen can rapidly recognize the abnormal state, the accident of the abnormal state is eliminated, the judgment effectiveness is improved, the abnormal processing efficiency is improved, and the driving safety is ensured.
Referring to fig. 4, fig. 4 is a schematic flowchart of a second embodiment of a video detection method based on a vehicle-mounted display screen according to the present invention.
Based on the first embodiment, the video detection method based on the vehicle-mounted display screen in this embodiment includes, in step S10:
step S101: when the video signal has a potential abnormal trend, acquiring color channel data of a video frame in the video signal.
It should be noted that each video frame has a color channel, and the color channel may be an RGB color channel, including a Red channel (Red), a Green channel (Green), and a Blue channel (Blue), and may also be another color channel, which is not limited in this embodiment.
Step S102: and obtaining the difference information of the video frame according to the color channel data of the video frame.
It is understood that the color channel data is data corresponding to each color channel, such as: if the acquired color channel is an RGB color channel, the color channel data includes red channel data, green channel data, and blue channel data. The difference information is obtained according to the color channel data of the video frame, after all the color channel data of the video frame are obtained, the contrast analysis is carried out to obtain the difference between the color channel data, and the difference information is generated.
Step S103: and obtaining the abnormal state information according to the difference information.
In a specific implementation, after obtaining all color channel data of the video frames and comparing and analyzing the color channel data between the video frames, the difference between the color channel data is calculated, and information of video frame abnormality, that is, information of an abnormal condition occurring in a video signal, can be obtained, where the color channel data of the video frames can be compared and analyzed by calculating a Cyclic Redundancy Check (CRC) value, and other analysis methods can also be used, which is not limited in this embodiment.
Further, before the step S101, the method further includes:
step S100: the method comprises the steps of obtaining initial color channel data of a video frame in a video signal, modifying the initial color channel data according to a preset modification range, and generating color channel data of the video frame, wherein the preset modification range comprises a preset color channel, a preset modification position and a preset modification number.
It can be understood that, in general, there is a difference between video frames, and the CRC value can be used to help determine whether there is an abnormality in a video frame, but when the previous frame is the same as the next frame, it is difficult to determine, for example: when the video frames are all the same blue background, the obtained difference information indicates that there is no difference between the video frames, and it can be determined that there is an abnormality in the video frames, which affects the final determination result.
It should be noted that, if the color channel data of the video frames are largely changed, the viewing experience of the user during the video display may be affected, therefore, the preset modification range is set in this embodiment, the color channel data is modified in a small range, the viewing experience is guaranteed while the slight difference between each video frame after modification is guaranteed, the preset modification range is the range of the data that needs to be modified, and includes the preset color channel, the preset modification position and the preset modification quantity, and can be set in the video detection program based on the vehicle-mounted display screen, for example: the preset color channel is set as the red channel, the preset modification position is set as the lowest bit position, the preset modification number is set as 2, and other parameters can be set.
In a specific implementation, the color channel data of the video frame is modified according to a preset modification range, for example: when the preset modification range is 2 bits of the lowest bit in the red channel, the modified color channel data are 00 for the first frame, 01 for the second frame, 10 for the third frame, 11 for the fourth frame, and 00 for the fifth frame, and so on, it can be ensured that the color channel difference exists between the video frames under normal conditions, so that the liquid crystal display can judge whether the video frames are abnormal or not.
In the embodiment, the color channel data of the video frames are modified, so that the difference between the video frames under the normal condition is ensured, the influence on the judgment result caused by the fact that the video frames are the same is avoided, the preset modification range is set, only small-range modification is carried out, the watching experience of a user is ensured, when the video signals are possibly abnormal, the color channel data of the video frames are obtained, the abnormality of the video frames is judged according to the difference information between the color channel data of the video frames obtained through analysis, and the judgment effectiveness is improved.
Referring to fig. 5, fig. 5 is a schematic flowchart of a video detection method based on a vehicle-mounted display screen according to a third embodiment of the present invention.
Based on the first embodiment, after step S40, the method for detecting a video based on a vehicle-mounted display screen in this embodiment further includes:
step S50: and sending the abnormal state information to a host computer so that the host computer processes the video signal according to the abnormal state information.
In the specific implementation, the video information is detected by the vehicle-mounted display screen, and when the video signal is judged to be in an abnormal state, the abnormal state information is directly fed back to the host machine, so that the host machine can recover the abnormal state, the state of the video signal does not need to be judged by the host machine, and the abnormal processing efficiency is improved.
Step S60: and when the video signal is in an abnormal state, acquiring abnormal time, and when the abnormal time is greater than preset recovery time, confirming that video display cannot be recovered, acquiring a preset warning picture, and outputting the preset warning picture.
It should be noted that the abnormal time is a time when the video signal is in an abnormal state, the preset warning picture is pre-stored in the vehicle-mounted display screen, and when the video signal is in the abnormal state, the preset warning picture can be normally displayed, and the preset recovery time is a functional safety failure recovery time, that is, a time required for recovering from the abnormal state to the normal state from the occurrence of the abnormal state can be set in a video detection program based on the vehicle-mounted display screen, for example: the preset recovery time is set to 1s, and other parameters can be set, so that the method is not limited, and can be flexibly adjusted according to actual conditions. And when the abnormal time is longer than the preset recovery time, judging that the video display cannot be recovered to be normal within the specified time, and outputting a preset warning picture to a liquid crystal display screen to remind a user of the abnormal video display, so that the driving safety is ensured.
In the embodiment, the vehicle-mounted display screen can quickly and effectively recognize that the video signal is in an abnormal state, and provides the abnormality for the host to perform the abnormality recovery processing, so that the efficiency of abnormality processing is improved, if the processing time is too long, the abnormality continues to be unable to recover, and the user can be prompted by presetting the warning picture, so that the driving safety is ensured.
As shown in fig. 6, the overall flow chart of video anomaly detection according to an embodiment first needs to perform a preliminary judgment on a video, determine whether the video has a potential anomaly trend, when the liquid crystal display screen judges that the video has a potential abnormal trend, the microcontroller reads the abnormal state information and judges whether the video frame has abnormality according to the abnormal state information, when the video frame is not abnormal, the video needs to be detected again, when the video frame display abnormality is detected for 10 times continuously, the video display abnormality is judged, the video display abnormality is fed back to the host for abnormality treatment, the display screen is ensured to be recovered to be normal as soon as possible, the driving safety is ensured, if the video frame display abnormality cannot be continuously detected for 10 times, the video detection is restarted, and the continuous abnormality times are restarted to ensure the detection effectiveness.
In addition, an embodiment of the present invention further provides a storage medium, where a video detection program based on a vehicle-mounted display screen is stored on the storage medium, and when being executed by a processor, the video detection program based on the vehicle-mounted display screen implements the steps of the video detection method based on the vehicle-mounted display screen as described above.
Referring to fig. 7, fig. 7 is a block diagram of a first embodiment of a video detection device based on a vehicle-mounted display screen according to the present invention.
As shown in fig. 7, the video detection apparatus based on the vehicle-mounted display screen according to the embodiment of the present invention includes:
the judgment module 10 is configured to, when a video signal has a potential abnormal trend, obtain abnormal state information according to difference information of video frames in the video signal;
the judging module 10 is further configured to determine that a video frame of the video signal is abnormal when the abnormal state information conforms to preset video frame abnormal information;
an updating module 20, configured to update the consecutive abnormal times when the video frame is abnormal;
the determining module 10 is further configured to determine that the video signal is in an abnormal state when the consecutive abnormal times is greater than or equal to a preset threshold.
In the embodiment, when a video signal has a potential abnormal trend, abnormal state information is obtained according to difference information of video frames in the video signal, when the abnormal state information accords with preset video frame abnormal information, the video frame of the video signal is judged to be abnormal, continuous abnormal times are updated, and when the continuous abnormal times are larger than or equal to a preset threshold value, the video signal is judged to be in an abnormal state, so that when the video signal is in the abnormal state, a vehicle-mounted display screen can rapidly recognize the abnormal state, the accident of the abnormal state is eliminated, the judgment effectiveness is improved, the abnormal processing efficiency is improved, and the driving safety is ensured.
In an embodiment, the determining module 10 is further configured to obtain color channel data of a video frame in a video signal when the video signal has a potential abnormal trend;
obtaining difference information of the video frame according to the color channel data of the video frame;
and obtaining the abnormal state information according to the difference information.
In an embodiment, the determining module 10 is further configured to obtain initial color channel data of a video frame in a video signal;
and modifying the initial color channel data according to a preset modification range to generate the color channel data of the video frame, wherein the preset modification range comprises a preset color channel, a preset modification position and a preset modification quantity.
In an embodiment, the determining module 10 is further configured to obtain a video state of the video signal;
and when the video state accords with a preset abnormal state, determining that the video signal has a potential abnormal trend.
In an embodiment, the updating module 20 is further configured to clear the abnormal state information when the number of consecutive abnormal times is smaller than a preset threshold, and return to execute the step of obtaining the abnormal state information according to the difference information of the video frames in the video signal when the video signal has a potential abnormal trend.
In an embodiment, the determining module 10 is further configured to send the abnormal state information to a host, so that the host processes a video signal according to the abnormal state information.
In an embodiment, the determining module 10 is further configured to obtain an abnormal time when the video signal is in an abnormal state;
when the abnormal time is greater than the preset recovery time, confirming that the video display cannot be recovered;
and acquiring a preset warning picture, and outputting the preset warning picture.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment may be referred to a video detection method based on a vehicle-mounted display screen provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A video detection method based on a vehicle-mounted display screen is characterized by comprising the following steps:
when a video signal has a potential abnormal trend, obtaining abnormal state information according to the difference information of video frames in the video signal;
when the abnormal state information accords with preset video frame abnormal information, determining that the video frame of the video signal is abnormal;
when the video frame is abnormal, updating the continuous abnormal times;
and when the continuous abnormal times are larger than or equal to a preset threshold value, determining that the video signal is in an abnormal state.
2. The method of claim 1, wherein obtaining abnormal state information according to difference information of video frames in the video signal when there is a potential abnormal trend in the video signal comprises:
when a video signal has a potential abnormal trend, acquiring color channel data of a video frame in the video signal;
obtaining difference information of the video frame according to the color channel data of the video frame;
and obtaining the abnormal state information according to the difference information.
3. The method as claimed in claim 2, wherein before acquiring color channel data of video frames in the video signal when there is a potential abnormal trend in the video signal, the method further comprises:
acquiring initial color channel data of a video frame in a video signal;
and modifying the initial color channel data according to a preset modification range to generate the color channel data of the video frame, wherein the preset modification range comprises a preset color channel, a preset modification position and a preset modification quantity.
4. The method as claimed in claim 1, wherein before obtaining the abnormal status information according to the difference information of the video frames in the video signal when there is a potential abnormal trend in the video signal, the method further comprises:
acquiring a video state of the video signal;
and when the video state accords with a preset abnormal state, determining that the video signal has a potential abnormal trend.
5. The method of claim 1, wherein after updating the number of consecutive exceptions when there is an exception in the video frame, further comprising:
and when the continuous abnormal times are smaller than a preset threshold value, clearing the abnormal state information, and returning to the step of executing whether the video signal has a potential abnormal trend.
6. The method according to claim 1, wherein after determining that the video signal is in an abnormal state when the number of consecutive exceptions is greater than or equal to a preset threshold, the method further comprises:
and sending the abnormal state information to a host computer so that the host computer processes the video signal according to the abnormal state information.
7. The method of any one of claims 1 to 6, wherein the video detection method based on the vehicle-mounted display screen further comprises:
when the video signal is in an abnormal state, acquiring abnormal time;
and when the abnormal time is greater than the preset recovery time, acquiring a preset warning picture, and outputting the preset warning picture.
8. The utility model provides a video detection device based on-vehicle display screen which characterized in that, video detection device based on-vehicle display screen includes:
the judging module is used for obtaining abnormal state information according to the difference information of video frames in the video signals when the video signals have potential abnormal trends;
the judging module is further configured to determine that a video frame of the video signal is abnormal when the abnormal state information conforms to preset video frame abnormal information;
the updating module is used for updating the continuous abnormal times when the video frames are abnormal;
the judging module is further configured to determine that the video signal is in an abnormal state when the consecutive abnormal times is greater than or equal to a preset threshold.
9. A video detection device based on an on-vehicle display screen, the device comprising: a memory, a processor and a vehicle display screen based video detection program stored on the memory and executable on the processor, the vehicle display screen based video detection program configured to implement the steps of the vehicle display screen based video detection method according to any one of claims 1 to 7.
10. A storage medium, wherein the storage medium stores thereon a video detection program based on a vehicle-mounted display screen, and the video detection program based on the vehicle-mounted display screen realizes the steps of the video detection method based on the vehicle-mounted display screen according to any one of claims 1 to 7 when being executed by a processor.
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