WO2023125588A1

WO2023125588A1 - Fire danger level determination method and apparatus

Info

Publication number: WO2023125588A1
Application number: PCT/CN2022/142553
Authority: WO
Inventors: 孙占辉; 陈涛; 黄丽达; 杨欢; 刘罡; 王晓萌; 刘春慧; 史盼盼; 狄文杰; 刘连顺; 赵晨阳; 秦阳阳
Original assignee: 北京辰安科技股份有限公司
Priority date: 2021-12-29
Filing date: 2022-12-27
Publication date: 2023-07-06
Also published as: CN114494944A

Abstract

The present disclosure relates to the technical field of artificial intelligence, and provided are a fire danger level determination method and apparatus, a device, and a storage medium. A specific solution comprises: obtaining video data of the site of a fire; determining the number of personnel, a color of the flames, a trend of the flames, and an environment type at the site of the fire according to the video data; and determining a danger level for the fire according to the number of personnel, the color of the flames, the trend of the flames, and the environment type.

Description

Method and device for determining fire hazard level

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202111640215.6 and a filing date of December 29, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present disclosure relates to the technical field of artificial intelligence, and in particular to a method, device, computer equipment and storage medium for determining a fire hazard level.

Background technique

In the event of a fire, decision makers often need to make reasonable decisions based on the degree of fire danger. The scene type of the fire scene, the scale of the fire, the location of the fire, the type of nearby combustibles, and the number of people are all important factors that affect the degree of fire danger. , whether to correctly judge the danger of fire in time often becomes an important factor for decision makers to make reasonable decisions.

In related technologies, the temperature information and smoke concentration information of the fire scene can be obtained based on the sensing temperature and smoke detection technology, so as to make an alarm for the fire. The level of danger at the scene.

Contents of the invention

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

The present disclosure provides a method, device, system and storage medium for determining a fire hazard level.

According to a first aspect of the present disclosure, a method for determining a fire hazard level is provided, including:

Obtain the video data of the fire scene;

According to the video data, determine the number of people at the fire scene, flame color, flame trend and scene type;

Determine the danger level of the fire according to the number of people, flame color, flame trend and scene type.

According to a second aspect of the present disclosure, a device for determining a fire hazard level is provided, including:

The acquisition module is used to acquire the video data of the fire scene;

The first determination module is used to determine the number of people, flame color, flame trend and scene type at the fire scene according to the video data;

The second determination module is configured to determine the danger level of the fire according to the number of people, flame color, flame trend and scene type.

According to a third aspect of the present disclosure, an electronic device is provided, including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can perform the instructions described in any one of the first aspects. Method for determining the fire hazard level.

According to a fourth aspect of the present disclosure, there is provided a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause the computer to execute the method described in any one of the first aspects. Methods for determining fire hazard levels.

According to a fifth aspect of the present disclosure, a computer program product is provided. When the instruction processor in the computer program product executes, the method for determining the fire hazard level proposed by the embodiment of the first aspect of the present disclosure is executed.

In the embodiment of the present disclosure, the video data of the fire scene is first obtained, and then according to the video data, the number of people, flame color, flame trend and scene type of the fire scene are determined, and then according to the number of people, flame color, flame Trend and scenario type to determine the hazard level of the fire in question. Therefore, based on the method of computer vision, static video summary, target detection and scene recognition can be carried out on the fire scene, and effective evaluation factors such as the number of people at the fire scene, flame color, flame trend and scene type can be determined, and then according to each risk assessment The characteristics of the factors determine the danger of the fire scene, and can accurately and real-time classify the danger of the fire scene, which is beneficial to the actual management of the fire scene.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Description of drawings

The above and/or additional aspects and advantages of the present disclosure will become apparent and understandable from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic flowchart of a method for determining a fire hazard level proposed by an embodiment of the present disclosure;

2 is a schematic flowchart of a method for determining a fire hazard level proposed by another embodiment of the present disclosure;

FIG. 3 is a structural block diagram of a device for determining a fire hazard level provided by the present disclosure;

FIG. 4 is a block diagram of an electronic device used to implement the fire hazard level determination method of the present disclosure.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present disclosure and should not be construed as limiting the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications and equivalents coming within the spirit and scope of the appended claims.

Wherein, it can be explained that the execution subject of the method for determining the fire hazard level in this embodiment is the device for determining the fire hazard level, which can be realized by software and/or hardware, and which can be configured in computer equipment, The computer equipment may include but not limited to a terminal, a server, etc. The method for determining the fire hazard level proposed in the present disclosure will be described below with the device for determining the fire hazard level as the execution subject.

Fig. 1 is a schematic flowchart of a method for determining a fire hazard level proposed by an embodiment of the present disclosure.

As shown in FIG. 1 , the method for determining the fire hazard level includes steps S101 to S103.

S101. Acquire video data of a fire scene.

It should be noted that when a fire breaks out, the videos and images of the fire scene record a lot of effective information on the scene, such as the type of scene, the scale of the fire, the location of the fire, the type of combustibles, and the number of people. An important element of the initial strategy.

In the present disclosure, the video data of the fire can be obtained through the camera device, which can be a video stream, and then the pictures in the video are detected and analyzed to extract key effective information, and then analyze the danger of the fire.

S102. According to the video data, determine the number of people at the fire scene, flame color, flame trend, and scene type.

Specifically, after the video data is acquired, in the present disclosure, key frames can be extracted from the video data, for example, the representative frames at the beginning or end of the scene transition can be predicted from the video frame sequence, so that the device can extract these Representative frames are analyzed as keyframes.

Specifically, the long short-term memory model (Long Short-Term Memory, LSTM) can be used to discover the relationship between the front and back image samples in the video frame sequence, and then mine the image representative frame in the sample as the key frame.

Wherein, the number of key frames may vary according to different settings, and those skilled in the art may select according to actual needs.

It should be noted that since the key frame is a clear fire start picture containing the fire scene, in this disclosure, the device can analyze each key frame to determine the number of people at the fire scene corresponding to each key frame, Flame color, flame tendency, and scene type.

Wherein, the flame color may be colorless, white, gray and black.

Among them, the scene types can be divided into commercial areas, offices, residences, stadium areas, street areas, outdoor activity areas, and natural environments.

In some embodiments, the keyframes may be detected through the pre-trained neural network model to determine the number of people, flame color, scene type and diagonal length of the flame detection frame corresponding to each keyframe.

For example, the Faster R-CNN algorithm can be used to use Resnet-50 as the basic neural network to image images of commercial areas, offices, residences, stadium areas, street areas, outdoor activity areas, and natural environments in any scene dataset. Training is carried out, and then the trained neural network is used as the scene classification neural network model of the present invention.

By inputting the keyframes into the classification neural network model, the scene type label corresponding to each keyframe can be determined, such as commercial area, office room, and residence.

In some embodiments, the keyframes can also be detected by using the pre-trained object recognition model to output the time information corresponding to each keyframe, the number of people, and the diagonal length of the flame detection frame.

For example, the yolov4 algorithm can be used to detect smoke, flames, and people. In the embodiment of the present disclosure, any flame and smoke scene data set can be used as the basis for pre-training, and the basic The neural network model is trained to obtain the target recognition model.

In some embodiments, the keyframes can be input into the target recognition model to output the time information corresponding to each keyframe, the number of people and the diagonal length of the flame detection frame.

In some embodiments, after the diagonal length corresponding to the flame detection frame corresponding to each key frame is determined, the flame trend corresponding to each key frame can be determined, such as the initial phase combustion, the development phase combustion, the overall combustion and the decline phase burning.

In some embodiments, according to each key frame, its corresponding adjacent reference key frame can be determined, such as the first two frames, according to the current key frame and the diagonal length of the flame detection frame adjacent to the reference key frame, that is, the flame With the size and timing information, the device can determine the flame trend corresponding to each keyframe.

S103. Determine the danger level of the fire according to the number of people, flame color, flame trend and scene type.

It is understandable that in order to solve the problem of assessing the degree of danger of a fire scene, according to the public safety triangle theory, the emergency and the carrier jointly determine the degree of danger of the accident. Fire is an emergency, and the location of the incident and the crowd at the location of the incident as the carrier jointly affect the danger of the fire. The fire is determined by the flame trend and smoke, which can be judged by the color of the smoke at the scene. Therefore, the degree of fire danger can be determined by the color of smoke, the number of people, the trend of flames and the type of scene.

In some embodiments, corresponding risk coefficients can be determined for the number of people, flame color, flame trend and scene type, and then the final risk assessment value can be determined according to the weight corresponding to each indicator. In some embodiments, the risk level can be reclassified to determine the final risk level of the fire scene, such as general risk, major risk, major risk, and extremely serious risk.

Fig. 2 is a schematic flowchart of a method for determining a fire hazard level proposed by an embodiment of the present disclosure.

As shown in Fig. 2, the method for determining the fire hazard level includes steps S201 to S208.

S201. Acquire video data of a fire scene.

It should be noted that, the specific implementation manner of step S201 may refer to the foregoing embodiments, and details are not described here.

S202. Determine a key frame in the video data according to the definition and content of each frame of image in the video data and the time interval between each frame of images.

It should be noted that the video data may correspond to a sequence of video frames, that is, video stream information. In this disclosure, redundant and fuzzy frames in the video may be filtered and screened using the video static summary technology, so as to obtain the video information. Valid frames, also known as key frames.

In some embodiments, the key frames in the sequence of video frames can be determined according to the clarity and content of each frame, that is, the amount of information and the time interval between each frame of images.

Among them, the key frame is also a representative picture, which is more conducive to reflecting various factors of the fire scene.

In some embodiments, the LSTM algorithm can be used to perform static video summarization on the video stream. In addition to clear, information-rich and less redundant frames, time information corresponding to key frames and the number of key frames need to be recorded. In addition, when extracting key frames, a certain threshold should be set for the time interval between key frames, so that it can be used to prevent excessive information reduction and affect judgment.

S203, analyzing the key frame to determine the number of people, flame color, flame trend and scene type at the fire scene.

In some embodiments, in the present disclosure, key frames can be detected by pre-training the generated neural network model to determine the number of people, flame color, scene type, and diagonal length of the flame detection frame corresponding to each key frame .

For example, the yolov4 algorithm can be used to detect smoke, flames, and people. In this disclosure, any flame and smoke scene data set can be used as the basis for pre-training, and the basic neural network can be trained by using a large number of labeled smoke and flame pictures The model is trained to obtain a target recognition model.

In some embodiments, the keyframes can be input into the target recognition model, so as to output the time information corresponding to each keyframe, the number of people, and the diagonal length of the flame detection frame.

In some embodiments, each key frame can be parsed to determine the diagonal length corresponding to the flame detection frame contained in each key frame, and then according to the time interval between each key frame and each key frame The length of the diagonal corresponding to the included flame detection box determines the flame trend.

Wherein, the judgment of the flame trend can be judged according to the size change of the flame detection frame in the picture after the fire starts. For example, the diagonal size of the flame detection frame in the first two key frames of the current frame can be extracted as a reference. For example, if it is assumed that the time corresponding to the current key frame is T _y , the diagonal length of the flame detection frame is D _y , and the time corresponding to the first two frames of the current frame is T _y-1 , T _y-2 , the diagonal length is is D _y-1 , D _y-2 .

It should be noted that the initial stage corresponds to a concave function rising in a monotonous interval with a low slope. Since the slope is low, a slope lower than a certain threshold is regarded as the initial stage of flame combustion; the change in the size of the flame frame in the development stage corresponds to a monotonous interval The ascending concave function; while the full combustion stage corresponds to a convex function or a linear function parallel to the time axis; the descending stage corresponds to a monotone interval descending function.

If the diagonal length of the flame detection frame of the current frame and the first two key frames and the time corresponding to the key frame satisfy the following relationship (1), it can be determined that the flame in the current frame is in the initial stage.

Wherein, δ is a preset slope threshold.

If the diagonal length of the flame detection frame of the current frame and the first two key frames and the time corresponding to the key frame satisfy the following relationship (2), it can be determined that the flame in the current frame is in the development stage.

If the diagonal length of the flame detection frame of the current frame and the first two key frames and the time corresponding to the key frame satisfy the following relationship (3), it can be determined that the flame in the current frame is in the full combustion stage.

If the diagonal length of the flame detection frame of the current frame and the first two key frames and the time corresponding to the key frame satisfy the following relationship (4), it can be determined that the flame in the current frame is in the descending stage.

D _Y <D _Y-1 <D _Y-2 (4)

S204. Determine a first risk factor according to the flame color.

It should be noted that the color of the smoke depends on the type of combustibles, and the color of the smoke can assist in judging the degree of fire burning and the degree of danger at the scene.

Wherein, the first risk coefficient may be a coefficient determined according to the danger of flame color.

Among them, white smoke, with the lowest temperature and small fire intensity, is set as the general risk factor.

Among them, the gray smoke should not be underestimated, it is very likely to be smoldering, or it may be high-temperature waiting to burn, so it is set to a higher risk factor.

Among them, the yellow-green smoke may be the burning of toxic chemicals, which is set as a major risk factor.

Among them, black smoke has the highest temperature and usually occurs when the fire is burning the most violently. The smoke is also mixed with raging flames. It is the most dangerous period in the fire and is set as an extremely serious risk factor.

It should be noted that for different risk coefficients, different corresponding values can be determined for them. For example, the general risk coefficient can correspond to a value in the range of [0,0.25], and for a larger risk coefficient, it can correspond to (0.25,0.5] The value within the range, for the major risk factor, it can correspond to the value in the range of (0.5,0.75], and for the extra major risk factor, it can correspond to the value in the range of (0.75,1].

It should be noted that the above examples are only illustrative, and those skilled in the art can determine according to actual needs.

S205. Determine a second risk factor according to the flame trend.

It should be noted that the stages of the flame correspond to different degrees of danger. Generally, the initial stage of the fire has a low degree of danger, but it is necessary to be alert to the flashover of the flame; In this stage, the fire will gradually become smaller, the temperature will gradually decrease, and the degree of danger will also decrease.

Therefore, the risk factor corresponding to the descending stage of the flame trend can be determined as a general risk factor, the risk factor corresponding to the initial stage of the flame trend can be determined as a relatively large risk factor, and the risk factor corresponding to the development stage of the flame trend can be determined as a major risk The risk factor corresponding to the comprehensive combustion stage of the flame trend is determined as the extremely serious risk factor.

S206. Determine a third risk factor according to the scene type.

Wherein, the third risk factor may be determined according to the risk corresponding to the scene type.

More specifically, the third risk coefficient can be set according to the randomness of the distribution and types of combustibles, the randomness of fire sources, and human activity conditions under the standards of the disclosed coefficient system, specifically for commercial areas, offices, and residential areas. , venue area, street area, natural environment and outdoor activity area.

Among them, commercial areas and offices belong to the first category, corresponding to the first-level risk factor; residential areas belong to the first category, corresponding to the second-level risk factor; venue areas and street areas are in the same category, corresponding to the third-level risk factor; natural environment and outdoor activity areas are One category corresponds to the four-level risk factor.

It should be noted that for different risk coefficients, different corresponding values can be determined for them. For example, the first-level risk coefficient can correspond to a value in the range of [0,0.25], and the second-level risk coefficient can correspond to (0.25,0.5 ], for the third-level risk coefficient, it can correspond to the value in the range of (0.5,0.75], and for the fourth-level risk factor, it can correspond to the value in the range of (0.75,1].

S207. Determine a fourth risk factor according to the number of people.

It should be noted that a large number of personnel means a higher risk of casualties, so the detection of the number of personnel is also necessary.

Wherein, the fourth risk factor may be a risk factor determined according to the number of persons.

In the present disclosure, the corresponding risk coefficient can be set based on the number of people at the fire scene. For example, after determining the number of people at the fire scene as P, if P is less than 10, the risk coefficient can be determined as the primary risk coefficient. If P is in [10, 50), the risk factor can be determined as an intermediate risk factor, if P is in [50,100), the risk factor can be determined as a high-level risk factor, and if P is greater than or equal to 100, the risk factor can be determined as an extremely serious risk factor.

It should be noted that for different risk coefficients, different corresponding values can be determined for them. For example, the primary risk coefficient can correspond to a value in the range of [0,0.25], and the intermediate risk coefficient can correspond to a value in the range of (0.25,0.5). For the high risk coefficient, it can correspond to the value in the range of (0.5,0.75], and for the extremely serious risk coefficient, it can correspond to the value in the range of (0.75,1].

S208. Determine a risk level according to the first risk factor, the second risk factor, the third risk factor, and the fourth risk factor.

It is understandable that the process of a fire growing from ignition to peak and then gradually slowing down, as well as its degree of damage and danger are closely related to the fire scene. Different building structures, fire load conditions, and fire spread possibilities in the scene Factors such as temperature resistance and heat release rate have a great influence on the site risk assessment. Compared with natural scenes, man-made environments usually have richer types of combustibles, more diverse combustion characteristics, and narrower spaces. Based on this, urban fire scenes are divided into commercial areas, offices, residences, stadium areas, and streets according to risk hazards. Areas, natural environments, and outdoor activity areas, the scene recognition algorithm is used to classify key frames into the above categories, and the corresponding scene risk coefficients are used as the basis for risk assessment.

In some embodiments, the risk level can be determined according to a preset reference weight, and the first risk factor, the second risk factor, the third risk factor and the fourth risk factor.

It should be noted that for each risk factor, a corresponding reference weight can be preset. For example, for the first risk factor, a reference weight corresponding to the flame color can be set, and for the second risk factor, a corresponding flame color can be set. For the reference weight of the trend, for the third risk factor, a reference weight corresponding to the number of people can be set, and for the fourth risk factor, a reference weight corresponding to the scene type can be set.

For example, if the first risk factor is A, its corresponding reference weight is a1, the second risk factor is B, its corresponding reference weight is a2, the third risk factor is C, and its corresponding reference weight is a3, The fourth risk factor is D, and its corresponding reference weight is a4, then it can be determined that the risk evaluation value is S=A*a1+B*a2+C*a3+D*a4.

After the risk assessment value is determined, the corresponding risk level can be determined according to the scope of S, such as general risk, major risk, major risk, and extremely serious risk.

In the embodiment of the present disclosure, the video data of the fire scene is first obtained, and then the key frames in the video data are determined according to the clarity of each frame of image in the video data, the content included and the time interval between each frame of images, Analyzing the key frame to determine the number of people at the fire scene, flame color, flame trend and scene type, and then determine the first risk factor according to the flame color, and determine the second risk factor according to the flame trend coefficient, according to the scene type, determine the third risk coefficient, determine the fourth risk coefficient according to the number of people, according to the first risk coefficient, the second risk coefficient, the third risk coefficient and the The fourth risk factor determines the level of risk. Thus, the effective frames and effective reference information of the video data of the fire scene can be extracted, and the danger level of the fire scene can be classified according to important factors such as the number of people, flame color, flame trend and scene type, so as to help decision makers make timely decisions. Make the right decision.

As shown in FIG. 3 , the device 300 for determining the fire hazard level includes: an acquisition module 310 , a first determination module 320 , and a second determination module 330 .

The acquisition module is used to acquire the video data of the fire scene.

The first determination module is configured to determine the number of people at the fire scene, flame color, flame trend and scene type according to the video data.

In some embodiments, the first determining module includes a first determining unit and an analyzing unit.

The first determination unit is configured to determine the key frame in the video data according to the definition and content of each frame image in the video data and the time interval between each frame image.

The parsing unit is configured to parse the key frames to determine the number of people, flame color, flame trend and scene type at the fire scene.

In some embodiments, the analysis unit is specifically configured to: analyze each of the key frames to determine the length of the diagonal line corresponding to the flame detection frame contained in each of the key frames; The time interval between the key frames and the diagonal length corresponding to the flame detection frame included in each key frame determine the flame trend.

In some embodiments, the second determination module includes a second determination unit, a third determination unit, a fourth determination unit, a fifth determination unit and a sixth determination unit.

The second determining unit is configured to determine a first risk factor according to the flame color.

The third determining unit is configured to determine a second risk factor according to the flame trend.

A fourth determining unit, configured to determine a third risk factor according to the scene type.

The fifth determining unit is configured to determine a fourth risk factor according to the number of people.

A sixth determining unit, configured to determine a risk level according to the first risk factor, the second risk factor, the third risk factor, and the fourth risk factor.

In some embodiments, the sixth determining unit is specifically configured to: determine the risk level according to a preset reference weight, and the first risk factor, the second risk factor, the third risk factor, and the fourth risk factor .

According to the embodiments of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium, and a computer program product.

In an embodiment of the present disclosure, an electronic device is provided, including: at least one processor; and a memory communicatively connected to the at least one processor. Wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can implement the method for determining the fire hazard level in any of the above embodiments.

In an embodiment of the present disclosure, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of the server, the server can perform the determination of the fire hazard level in any of the above-mentioned embodiments. method.

In an embodiment of the present disclosure, a computer program product including computer programs/instructions is provided. When the computer program/instruction is executed by the processor, the method for determining the fire hazard level in any of the above embodiments is realized.

FIG. 4 shows a schematic block diagram of an example electronic device 400 that may be used to implement embodiments of the present disclosure. Electronic device is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other suitable computers. Electronic devices may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are by way of example only, and are not intended to limit implementations of the disclosure described and/or claimed herein.

As shown in FIG. 4, the device 400 includes a computing unit 401 that can execute according to a computer program stored in a read-only memory (ROM) 402 or loaded from a storage unit 408 into a random-access memory (RAM) 403. Various appropriate actions and treatments. In the RAM 403, various programs and data necessary for the operation of the device 400 can also be stored. The computing unit 401, ROM 402, and RAM 403 are connected to each other through a bus 404. An input/output (I/O) interface 405 is also connected to bus 404 .

Multiple components in the device 400 are connected to the I/O interface 405, including: an input unit 406, such as a keyboard, a mouse, etc.; an output unit 407, such as various types of displays, speakers, etc.; a storage unit 408, such as a magnetic disk, an optical disk, etc. ; and a communication unit 409, such as a network card, a modem, a wireless communication transceiver, and the like. The communication unit 409 allows the device 400 to exchange information/data with other devices over a computer network such as the Internet and/or various telecommunication networks.

The computing unit 401 may be various general-purpose and/or special-purpose processing components having processing and computing capabilities. Some examples of computing units 401 include, but are not limited to, central processing units (CPUs), graphics processing units (GPUs), various dedicated artificial intelligence (AI) computing chips, various computing units that run machine learning model algorithms, digital signal processing processor (DSP), and any suitable processor, controller, microcontroller, etc. The calculation unit 401 executes various methods and processes described above, such as a method for determining a fire hazard level. For example, in some embodiments, the fire hazard level determination method may be implemented as a computer software program tangibly embodied on a machine-readable medium, such as storage unit 408 . In some embodiments, part or all of the computer program may be loaded and/or installed on the device 400 via the ROM 402 and/or the communication unit 409. When the computer program is loaded into the RAM 403 and executed by the computing unit 401, one or more steps of the method for determining the fire hazard level described above may be performed. Alternatively, in other embodiments, the computing unit 401 may be configured in any other appropriate way (for example, by means of firmware) to execute the method for determining the fire hazard level.

Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips Implemented in a system of systems (SOC), load programmable logic device (CPLD), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include being implemented in one or more computer programs executable and/or interpreted on a programmable system including at least one programmable processor, the programmable processor Can be special-purpose or general-purpose programmable processor, can receive data and instruction from storage system, at least one input device, and at least one output device, and transmit data and instruction to this storage system, this at least one input device, and this at least one output device an output device.

Program codes for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special purpose computer, or other programmable data processing devices, so that the program codes, when executed by the processor or controller, make the functions/functions specified in the flow diagrams and/or block diagrams Action is implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media would include one or more wire-based electrical connections, portable computer discs, hard drives, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, compact disk read only memory (CD-ROM), optical storage, magnetic storage, or any suitable combination of the foregoing.

To provide for interaction with the user, the systems and techniques described herein can be implemented on a computer having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user. ); and a keyboard and pointing device (eg, a mouse or a trackball) through which a user can provide input to the computer. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and can be in any form (including Acoustic input, speech input or, tactile input) to receive input from the user.

The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., as a A user computer having a graphical user interface or web browser through which a user can interact with embodiments of the systems and techniques described herein), or including such backend components, middleware components, Or any combination of front-end components in a computing system. The components of the system can be interconnected by any form or medium of digital data communication, eg, a communication network. Examples of communication networks include: local area networks (LANs), wide area networks (WANs), the Internet, and blockchain networks.

A computer system may include clients and servers. Clients and servers are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the problem of traditional physical host and VPS service ("Virtual Private Server", or "VPS") Among them, there are defects such as difficult management and weak business scalability. The server can also be a server of a distributed system, or a server combined with a blockchain.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, each step described in the present disclosure may be executed in parallel, sequentially, or in a different order, as long as the desired result of the technical solution disclosed in the present disclosure can be achieved.

The specific implementation manners described above do not limit the protection scope of the present disclosure. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

A method for determining a fire hazard level, comprising:

Obtain the video data of the fire scene;

According to the video data, determine the number of people at the fire scene, flame color, flame trend and scene type;

Determine the danger level of the fire according to the number of people, flame color, flame trend and scene type.
The method according to claim 1, wherein, according to the video data, determining the number of people at the fire scene, flame color, flame trend and scene type includes:

Determine the key frame in the video data according to the clarity of each frame of image in the video data, the contained content and the time interval between each frame of images;

The key frame is analyzed to determine the number of people, flame color, flame trend and scene type at the fire scene.
The method according to claim 2, wherein said analyzing the key frame to determine the flame trend of the fire scene comprises:

Analyzing each of the key frames to determine the diagonal length corresponding to the flame detection frame contained in each of the key frames;

The flame trend is determined according to the time interval between each of the key frames and the length of the diagonal line corresponding to the flame detection frame included in each of the key frames.
The method according to any one of claims 1 to 3, wherein, according to the number of people, flame color, flame trend and scene type, determining the danger level of the fire comprises:

determining a first risk factor according to the flame color;

determining a second risk factor based on the flame trend;

Determine a third risk factor according to the scene type;

Determine the fourth risk factor according to the number of personnel;

A risk level is determined according to the first risk factor, the second risk factor, the third risk factor, and the fourth risk factor.
The method according to claim 4, wherein said determining the risk level according to the first risk factor, the second risk factor, the third risk factor and the fourth risk factor comprises:

The risk level is determined according to the preset reference weight, and the first risk factor, the second risk factor, the third risk factor and the fourth risk factor.
A device for determining a fire hazard level, comprising:

The acquisition module is used to acquire the video data of the fire scene;

The first determination module is used to determine the number of people, flame color, flame trend and scene type at the fire scene according to the video data;

The second determination module is configured to determine the danger level of the fire according to the number of people, flame color, flame trend and scene type.
The device according to claim 6, wherein the first determining module comprises:

The first determination unit is configured to determine the key frame in the video data according to the clarity of each frame of image in the video data, the contained content and the time interval between each frame of image;

The parsing unit is configured to parse the key frames to determine the number of people, flame color, flame trend and scene type at the fire scene.
The device according to claim 7, wherein the parsing unit is specifically configured to:

Analyzing each of the key frames to determine the diagonal length corresponding to the flame detection frame contained in each of the key frames;

The flame trend is determined according to the time interval between each of the key frames and the length of the diagonal line corresponding to the flame detection frame included in each of the key frames.
The device according to any one of claims 6 to 8, wherein the second determination module includes:

a second determination unit, configured to determine a first risk factor according to the flame color;

a third determining unit, configured to determine a second risk factor according to the flame trend;

A fourth determining unit, configured to determine a third risk factor according to the scene type;

A fifth determining unit, configured to determine a fourth risk factor according to the number of persons;

A sixth determining unit, configured to determine a risk level according to the first risk factor, the second risk factor, the third risk factor, and the fourth risk factor.
The device according to claim 9, wherein the sixth determining unit is specifically configured to:

The risk level is determined according to the preset reference weight, and the first risk factor, the second risk factor, the third risk factor and the fourth risk factor.
An electronic device comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can implement any one of claims 1 to 5. The method for determining the fire hazard level described above.
A computer-readable storage medium, when the instructions in the computer-readable storage medium are executed by the processor of the server, the server is able to perform the fire hazard level determination according to any one of claims 1 to 5 Determine the method.
A computer program product, including computer programs/instructions, wherein, when the computer programs/instructions are executed by a processor, the method for determining the fire hazard level according to any one of claims 1 to 5 is realized.