System and method for real-time supervision of air freight customs

Abstract

The invention discloses an air freight customs real-time supervision system and method. The system comprises an X-ray machine image acquisition work station, a customs standard supervision work station, a customs key supervision work station, a freight transport system interface, a server, a customs unpacker work station and a customs administrator work station. The X-ray machine image acquisition work station, the customs standard supervision work station, the customs key supervision work station, the freight transport system interface, the customs unpacker work station and the customs administrator work station are respectively connected with the server. According to the invention, cargo security inspection images of X-ray machines of various brands can be acquired through the X-ray machine image acquisition work station, so that the problem that the cargo security inspection images cannot be accessed to the same customs supervision system under the condition of unmanned docking of X-ray machine manufacturers is solved; and meanwhile, the cargo security inspection images of the security inspection channel are displayed in a centralized manner in real time through a customs standard supervision work station in a 1: N form, so that 100% full-process closed-loop supervision of the cargo leaving the port is realized.

Description

Technical Field

[0001] The invention relates to a system for real-time customs supervision of air cargo transportation, and also to a method for real-time customs supervision of air cargo transportation, belonging to the technical field of logistics supervision. Background Art

[0002] With the rapid development of air cargo business, especially the rapid development of international cargo business, higher requirements have been put forward for customs supervision. At present, cargo security information systems have been widely used, but there are still some challenges in the field of customs supervision. On the one hand, although the cargo security information system developed by the security inspection equipment manufacturer can meet the full closed-loop processing of customs supervision business, it cannot centrally supervise the cargo security inspection images generated by non-self-developed X-ray machines. On the other hand, since the cargo security inspection information system manufacturer does not have the cargo security inspection images generated by the X-ray machine, it cannot centrally supervise the cargo security inspection images generated by the X-ray machine, which does not meet the requirements of closed-loop processing of the full business of customs supervision. In addition, in order to achieve 100% supervision of outbound cargo, each X-ray machine needs to be equipped with an image judgment program, which not only increases the use area of ​​​​the office space, but also requires more customs supervisors.

[0003] The existence of the above-mentioned problems not only increases the manpower and material costs of customs supervision, but also reduces customs work efficiency and hinders the customs clearance timeliness of goods. Summary of the invention

[0004] The primary technical problem to be solved by the present invention is to provide a system for real-time customs supervision of air cargo transportation.

[0005] Another technical problem to be solved by the present invention is to provide a method for real-time customs supervision of air cargo transportation.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] According to a first aspect of an embodiment of the present invention, there is provided a system for real-time customs supervision of air cargo, comprising: an X-ray image acquisition workstation, a customs standard supervision workstation, a customs key supervision workstation, a cargo system interface, a server, a customs package opener workstation, and a customs administrator workstation;

[0008] The X-ray image acquisition workstation, the customs standard supervision workstation, the customs key supervision workstation, the freight system interface, the customs package opener workstation and the customs administrator workstation are respectively connected to the server;

[0009] Wherein, the X-ray machine image acquisition workstation and the freight system interface send data to the server respectively;

[0010] The customs standard supervision workstation, the customs key supervision workstation, the customs package opener workstation and the customs administrator workstation receive data from the server respectively, and process the received data before sending it to the server.

[0011] Preferably, the X-ray image acquisition workstation is connected to the X-ray image signal output device of the security inspection channel, and each security inspection channel is equipped with an X-ray image acquisition workstation.

[0012] Preferably, the customs standard supervision workstation centrally displays the cargo security inspection images of the security inspection channel in real time in a 1:N format; wherein N is the number of image judgment programs started simultaneously for image judgment.

[0013] Preferably, when a judgment group is designated for judgment, the judgment program only displays the cargo security inspection images of the X-ray equipment in the judgment group; when no judgment group is designated, the judgment program displays the cargo security inspection images of all X-ray equipment.

[0014] Preferably, if the X-ray image acquisition workstation is equipped with a barcode scanner and scans the barcode of the goods, each image recognition program on the customs standard supervision workstation will display the cargo manifest information corresponding to the cargo security inspection image on the same screen.

[0015] Preferably, the image judgment program displays the security inspection channel information of the X-ray machine corresponding to the current cargo security inspection image and the remaining image judgment time of the current cargo security inspection image. When the remaining image judgment time becomes zero, the cargo security inspection image is automatically judged to have passed.

[0016] Preferably, the customs administrator workstation includes: an image query module, a cargo list information query module and a customs supervisor information management module;

[0017] The image query module is used to query the cargo security inspection image, the image judgment results of the customs standard supervision workstation and / or the customs key supervision workstation, and the inspection results of the cargo opened by the customs package opener workstation;

[0018] The cargo list information query module is used to query the cargo list information stored in the freight system interface;

[0019] The customs supervision personnel information management module is used to manage the personnel information that can log into the customs real-time supervision system for air cargo transportation.

[0020] According to a second aspect of an embodiment of the present invention, a method for real-time customs supervision of air cargo is provided, comprising the following steps:

[0021] S1: Split the collected X-ray machine video stream into two, connect one of the video streams to the X-ray machine, and connect the other video stream to the X-ray machine image acquisition workstation;

[0022] S2: The X-ray image acquisition workstation decodes and analyzes the video stream and regenerates the cargo security inspection image;

[0023] S3: Freight system interface obtains and stores cargo order information;

[0024] S4: Send the cargo security inspection images and cargo manifest information to the customs standard supervision workstation, and centrally display the cargo security inspection images of the security inspection channel in real time in a 1:N format;

[0025] S5: The customs standard supervision workstation judges the cargo security inspection images and verifies the corresponding cargo manifest information;

[0026] S6: Customs key supervision workstations supervise and spot-check the work of customs standard supervision workstations;

[0027] S7: The customs package opener workstation polls whether there are goods to be opened for inspection;

[0028] If it exists, the customs package opener workstation will open the package for inspection and register the package opening information and processing results; if it does not exist, the polling status will be maintained;

[0029] S8: The cargo security inspection images, image judgment results, package inspection results and cargo list information are stored in the server for data retention and retrieval of relevant information.

[0030] Preferably, the method for the X-ray machine image acquisition workstation to decode and analyze the video stream and regenerate the cargo security inspection image includes:

[0031] S01: Split the collected X-ray machine video stream into two, connect one of the video streams to the X-ray machine, and connect the other video stream to the X-ray machine image acquisition workstation;

[0032] S02: Initialize the X-ray machine image acquisition workstation and set the saved white background matching value to 0;

[0033] S03: Select a corresponding decoding method for decoding according to the characteristics of the collected video stream;

[0034] S04: Obtain the white background matching value under the current decoding mode;

[0035] S05: Determine whether the white background matching value under the current decoding mode is greater than the white background clarity threshold;

[0036] If the white background matching value under the current decoding mode is greater than or equal to the white background clarity threshold, then enter step S06; if the white background matching value under the current decoding mode is less than the white background clarity threshold, then determine whether the white background matching value under the current decoding mode is greater than the saved white background matching value;

[0037] If the white background matching value under the current decoding mode is greater than or equal to the saved white background matching value, the saved white background matching value is set as the white background matching value under the current decoding mode, and steps S03 to S05 are repeated until all decoding modes are traversed, and step S06 is entered; if the white background matching value under the current decoding mode is less than the saved white background matching value, steps S03 to S05 are repeated until all decoding modes are traversed, and step S06 is entered;

[0038] S06: setting the white background clarity threshold to the white background matching value under the current decoding mode;

[0039] S07: Capture each frame at a specified resolution, and determine whether the white background matching value of each captured frame is less than a white background clarity threshold;

[0040] If the white background matching value of the current frame is less than the white background clarity threshold, it means that the current frame contains the cargo image information scanned by the X-ray device, and the current frame is saved to the frame queue, and step S07 is repeated; if the white background matching value of the current frame is greater than or equal to the white background clarity threshold, it is determined whether the frame queue is empty;

[0041] If the frame queue is empty, repeat step S07; if the frame queue is not empty, proceed to step S08;

[0042] S08: All frames in the frame queue are removed from the queue one by one, and are spliced ​​into a complete cargo security inspection image from the earliest to the latest in the order of removal, and the image is saved.

[0043] Preferably, the white background matching value is defined as: the similarity between the RGB code when the X-ray machine video stream does not contain the cargo security inspection image and the white background RGB code; wherein, if the similarity is greater, the white background matching value is greater and the color difference is smaller; if the similarity is smaller, the white background matching value is smaller and the color difference is greater;

[0044] The white background clarity threshold is defined as: the clarity of the white background displayed after the X-ray device video stream is decoded.

[0045] Compared with the prior art, the present invention, through the innovatively set X-ray image acquisition workstation, is compatible with and can collect cargo security inspection images of various brands of X-ray machines, effectively solving the problem that cargo security inspection images cannot be uniformly connected to the customs supervision system in the absence of direct support from X-ray machine manufacturers. Through the customs standard supervision workstation, the present invention realizes the real-time centralized display of cargo security inspection images of multiple security inspection channels in the form of 1:N, greatly reducing the demand for venues, equipment and human resources, thereby solving the problem that traditional supervision workstations can only supervise a single X-ray machine and require a large number of supervisors. In addition, the present invention also realizes the function of closed-loop supervision of the entire process of customs business through coordination with the customs key supervision workstation, the package opener workstation and the administrator workstation, overcoming the shortcomings of the existing freight security inspection information system in meeting the closed-loop supervision of the entire process of customs business. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the structure of a system for real-time customs supervision of air cargo provided by an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of an application environment of a system for real-time customs supervision of air cargo provided by an embodiment of the present invention;

[0048] Figure 3 A logic diagram of the working principle of the X-ray machine image acquisition workstation provided in an embodiment of the present invention;

[0049] Figure 4 A flowchart of a method for real-time customs supervision of air cargo provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The technical content of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] First embodiment

[0052] like Figure 1 As shown, a system for real-time customs supervision of air cargo provided by the first embodiment of the present invention includes: an X-ray image acquisition workstation, a customs standard supervision workstation, a customs key supervision workstation, a cargo system interface, a server, a customs package opener workstation and a customs administrator workstation.

[0053] Among them, the X-ray image acquisition workstation, the customs standard supervision workstation, the customs key supervision workstation, the freight system interface, the customs package opener workstation and the customs administrator workstation are connected to the server respectively. The X-ray image acquisition workstation and the freight system interface send data to the server respectively. The customs standard supervision workstation, the customs key supervision workstation, the customs package opener workstation and the customs administrator workstation receive data from the server respectively, and send the received data to the server after processing.

[0054] like Figure 2 As shown, the X-ray machine image acquisition workstation is connected to the X-ray machine image signal output device of the security inspection channel, and each security inspection channel is equipped with an X-ray machine image acquisition workstation. Its function is to decode, segment, store and output the X-ray machine video stream.

[0055] Preferably, a barcode scanning device is added to the X-ray image acquisition workstation to scan the barcode of the goods and realize the binding of the goods with the security inspection image.

[0056] like Figure 3 As shown, the working principle of the X-ray image acquisition workstation is as follows:

[0057] S01: Split the collected X-ray machine video stream into two, connect one of the video streams to the X-ray machine, and connect the other video stream to the X-ray machine image acquisition workstation.

[0058] S02: Initialize the X-ray machine image acquisition workstation and set the saved white background matching value Z' to 0.

[0059] The definition of white background is: the background color of the cargo security inspection image.

[0060] It should be noted that the background color of the cargo security inspection image is normally white, and the RGB code is (255, 255, 255). The specific situation depends on the actual scenario, and the present invention is not limited to this.

[0061] S03: According to the characteristics of the collected video stream, a corresponding decoding method is selected for decoding.

[0062] The decoding method is preset inside the X-ray machine image acquisition workstation.

[0063] It should be noted that the decoding method is preset based on the known video stream characteristics of each manufacturer. If a new X-ray equipment manufacturer is added to the usage scenario, a corresponding preset decoding method will be added.

[0064] S04: Obtain the white background matching value Z under the current decoding mode.

[0065] The white background matching value is defined as: the similarity between the RGB code when the X-ray machine video stream does not contain the cargo security inspection image and the white background RGB code. The greater the similarity, the greater the white background matching value and the smaller the color difference; the smaller the similarity, the smaller the white background matching value and the larger the color difference.

[0066] S05: Determine whether the white background matching value Z under the current decoding mode is greater than the white background clarity threshold Y.

[0067] If the white background matching value Z under the current decoding mode is greater than or equal to the white background definition threshold Y, then enter step S06. If the white background matching value Z under the current decoding mode is less than the white background definition threshold Y, then determine whether the white background matching value Z under the current decoding mode is greater than the saved white background matching value Z'.

[0068] If the white background matching value Z under the current decoding mode is greater than or equal to the saved white background matching value Z', the saved white background matching value Z' is set as the white background matching value Z under the current decoding mode, and steps S03 to S05 are repeated until all decoding modes are traversed, and step S06 is entered. If the white background matching value Z under the current decoding mode is less than the saved white background matching value Z', steps S03 to S05 are repeated until all decoding modes are traversed, and step S06 is entered.

[0069] The definition of white background clarity threshold Y is: the clarity of the white background displayed after the X-ray machine video stream is decoded. If the white background clarity threshold Y is set too large, the cargo security inspection image cannot be captured. If the white background clarity threshold Y is set too small, it will affect the recognition of the security inspection image by the X-ray machine image acquisition workstation, resulting in one security inspection image being split into multiple security inspection images.

[0070] It should be noted that the white background clarity threshold value Y is determined according to the actual scene, and the present invention is not limited to this.

[0071] S06: setting the white background clarity threshold Y to the white background matching value Z in the current decoding mode.

[0072] S07: Capture each frame at a specified resolution, and determine whether the white background matching value of each captured frame is less than a white background clarity threshold Y.

[0073] If the white background matching value of the current frame is less than the white background clarity threshold value Y, it means that the current frame contains the cargo image information scanned by the X-ray device, and the current frame is saved to the frame queue, and step S07 is repeated. If the white background matching value of the current frame is greater than or equal to the white background clarity threshold value Y, it is determined whether the frame queue is empty.

[0074] If the frame queue is empty, step S07 is repeated. If the frame queue is not empty, step S08 is entered.

[0075] Among them, the aspect ratio of the resolution meets the frame splicing requirements, and its function is to make the image spliced ​​by the frames form a complete cargo security inspection image.

[0076] S08: All frames in the frame queue are removed from the queue one by one, and are spliced ​​into a complete cargo security inspection image from the earliest to the latest in the order of removal, and the image is saved.

[0077] The customs standard supervision workstation is located in the customs supervision office, and displays the cargo security inspection images of the security inspection channel in real time in a 1:N format.

[0078] Wherein, N is the number of image judgment programs started at the same time. When a judgment group is specified for image judgment, the image judgment program only displays the cargo security inspection images of the X-ray equipment in the judgment group. When no judgment group is specified, the image judgment program displays the cargo security inspection images of all X-ray equipment.

[0079] The cargo security inspection images are collected and stored by the X-ray machine image acquisition workstation. The pre-set image judgment program obtains the cargo security inspection images that have not been judged in the image judgment group in accordance with the settings of the image judgment group and the order in which the cargo security inspection images are generated, and displays them. It should be noted that the above-mentioned image judgment program is a conventional technical means in the field of security inspection and will not be described in detail here.

[0080] The definition of the image judgment group is: the range in which the image judgment program can judge the cargo security inspection images generated by the X-ray equipment. The range includes the cargo security inspection images generated by one or more X-ray equipment.

[0081] Preferably, if the X-ray image acquisition workstation is equipped with a barcode scanner and scans the barcode of the goods, each image recognition program on the customs standard supervision workstation will display the cargo manifest information corresponding to the cargo security inspection image on the same screen.

[0082] Preferably, the image judgment program displays the security inspection channel information of the X-ray machine corresponding to the current cargo security inspection image and the remaining image judgment time of the current cargo security inspection image. When the remaining image judgment time becomes zero, the cargo security inspection image is automatically judged to have passed.

[0083] The customs key supervision workstation is located in the customs supervision office. Compared with the customs standard supervision workstation, it has higher supervision authority and can take over any image interpretation group supervised by the customs standard supervision workstation at any time.

[0084] The image judgment group selected by the customs key supervision workstation will stop the image judgment work in the customs standard supervision workstation and display the corresponding prompt information in the customs standard supervision workstation. After the customs key supervision workstation cancels the takeover, the image judgment program of the image judgment group will resume the image judgment work in the customs standard supervision workstation.

[0085] Preferably, the customs key supervision workstation can display the user's login time and issue a shift change reminder when the login time reaches a threshold.

[0086] The function of the freight system interface is to connect to the external freight system, obtain and store the manifest information, so that the customs standard supervision workstation and the customs key supervision workstation can search and display the manifest information stored in the freight system interface according to the cargo barcode bound to the cargo security inspection image.

[0087] The role of the server is to store, send and receive data information.

[0088] The customs package opener workstation is located on the land side of the security inspection channel. Its function is to poll whether there are goods to be opened for inspection.

[0089] If it exists, the customs package opener workstation will open the package for inspection and register the package opening information and processing results. If it does not exist, the polling status will be maintained.

[0090] The customs administrator workstation is located in the customs supervision office. The customs administrator workstation includes: image query module, cargo manifest information query module and customs supervisor information management module.

[0091] The image query module is used to query the cargo security inspection images scanned by X-ray equipment, the image judgment results of the customs standard supervision workstation and / or the customs key supervision workstation, and the inspection results of the cargo opened by the customs package opener workstation.

[0092] The function of the cargo list information query module is to query the cargo list information stored in the freight system interface.

[0093] The function of the customs supervision personnel information management module is to manage the personnel information that can log into the customs real-time supervision system for air cargo.

[0094] Second embodiment

[0095] like Figure 4 As shown, the second embodiment of the present invention provides a method for real-time customs supervision of air cargo, including the following steps:

[0096] S1: Split the collected X-ray machine video stream into two, connect one of the video streams to the X-ray machine, and connect the other video stream to the X-ray machine image acquisition workstation.

[0097] S2: The X-ray image acquisition workstation decodes and analyzes the video stream and regenerates the cargo security inspection image.

[0098] The method by which the X-ray image acquisition workstation decodes and analyzes the video stream and regenerates the cargo security inspection image is the same as the working principle of the X-ray image acquisition workstation, and the present invention will not be repeated here.

[0099] S3: The freight system interface obtains and stores the cargo order information.

[0100] S4: The cargo security inspection images and cargo manifest information are sent to the customs standard supervision workstation, and the cargo security inspection images of the security inspection channel are centrally displayed in real time in a 1:N format.

[0101] S5: The customs standard supervision workstation interprets the cargo security inspection images and verifies the corresponding cargo manifest information.

[0102] S6: Customs key supervision workstations supervise and spot-check the work of customs standard supervision workstations.

[0103] S7: The customs package opener workstation polls whether there are goods to be opened for inspection.

[0104] If it exists, the customs package opener workstation will open the package for inspection and register the package opening information and processing results. If it does not exist, the polling status will be maintained.

[0105] S8: The cargo security inspection images, image judgment results, package inspection results and cargo list information are stored in the server for data retention and retrieval of relevant information.

[0106] It should be noted that the above-mentioned multiple embodiments are only examples, and the technical solutions of various embodiments can be combined, all of which are within the protection scope of the present invention.

[0107] Compared with the prior art, the present invention, through the innovatively set X-ray image acquisition workstation, is compatible with and can collect cargo security inspection images of various brands of X-ray machines, effectively solving the problem that cargo security inspection images cannot be uniformly connected to the customs supervision system in the absence of direct support from X-ray machine manufacturers. Through the customs standard supervision workstation, the present invention realizes the real-time centralized display of cargo security inspection images of multiple security inspection channels in the form of 1:N, greatly reducing the demand for venues, equipment and human resources, thereby solving the problem that traditional supervision workstations can only supervise a single X-ray machine and require a large number of supervisors. In addition, the present invention also realizes the function of closed-loop supervision of the entire process of customs business through coordination with the customs key supervision workstation, the package opener workstation and the administrator workstation, overcoming the shortcomings of the existing freight security inspection information system in meeting the closed-loop supervision of the entire process of customs business.

[0108] The above is a detailed description of the system and method for real-time customs supervision of air cargo provided by the present invention. For those skilled in the art, any obvious changes made to it without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims

1. A system for real-time customs supervision of air cargo, characterized in that include: X-ray image acquisition workstation, customs standard supervision workstation, customs key supervision workstation, freight system interface, server, customs package opener workstation and customs administrator workstation; among them, The X-ray image acquisition workstation, the customs standard supervision workstation, the customs key supervision workstation, the freight system interface, the customs package opener workstation and the customs administrator workstation are respectively connected to the server; The X-ray image acquisition workstation and the freight system interface send data to the server respectively; the customs standard supervision workstation, the customs key supervision workstation, the customs package opener workstation and the customs administrator workstation receive data from the server respectively, and process the received data before sending it to the server.

2. The system according to claim 1, characterized in that The X-ray image acquisition workstation is connected to the X-ray image signal output device of the security inspection channel, and each security inspection channel is equipped with an X-ray image acquisition workstation.

3. The system according to claim 1, characterized in that The customs standard supervision workstation displays the cargo security inspection images of the security inspection channel in real time in a 1:N format; wherein N is the number of image judgment programs started simultaneously for image judgment.

4. The system according to claim 3, characterized in that When a judgment group is specified for judgment, the judgment program only displays the cargo security inspection images of the X-ray equipment in the judgment group; when no judgment group is specified, the judgment program displays the cargo security inspection images of all X-ray equipment.

5. The system according to claim 4, characterized in that If the X-ray image acquisition workstation is equipped with a barcode scanner and scans the barcode of the goods, each image recognition program on the customs standard supervision workstation will display the cargo list information corresponding to the cargo security inspection image on the same screen.

6. The system according to claim 5, characterized in that The image judgment program displays the security inspection channel information of the X-ray machine corresponding to the current cargo security inspection image and the remaining image judgment time of the current cargo security inspection image. When the remaining image judgment time becomes zero, the cargo security inspection image is automatically judged to have passed.

7. The system of claim 1, wherein The customs administrator workstation includes: an image query module, a cargo list information query module and a customs supervisor information management module; The image query module is used to query the cargo security inspection image, the image judgment results of the customs standard supervision workstation and / or the customs key supervision workstation, and the inspection results of the cargo opened by the customs package opener workstation; The cargo list information query module is used to query the cargo list information stored in the freight system interface; The customs supervision personnel information management module is used to manage the personnel information that can log into the customs real-time supervision system for air cargo transportation.

8. A method for real-time customs supervision of air cargo, implemented based on the system described in any one of claims 1 to 7, characterized in that The steps include: S1: Split the collected X-ray machine video stream into two, connect one of the video streams to the X-ray machine, and connect the other video stream to the X-ray machine image acquisition workstation; S2: The X-ray image acquisition workstation decodes and analyzes the video stream and regenerates the cargo security inspection image; S3: Freight system interface obtains and stores cargo order information; S4: Send the cargo security inspection images and cargo manifest information to the customs standard supervision workstation, and centrally display the cargo security inspection images of the security inspection channel in real time in a 1:N format; S5: The customs standard supervision workstation judges the cargo security inspection images and verifies the corresponding cargo manifest information; S6: Customs key supervision workstations supervise and spot-check the work of customs standard supervision workstations; S7: The customs package opener workstation polls whether there are goods to be opened for inspection; If it exists, the customs package opener workstation will open the package for inspection and register the package opening information and processing results; if it does not exist, the polling status will be maintained; S8: The cargo security inspection images, image judgment results, package inspection results and cargo list information are stored in the server for data retention and retrieval of relevant information.

9. The method according to claim 8, characterized in that The method for the X-ray machine image acquisition workstation to decode and analyze the video stream and regenerate the cargo security inspection image includes: S01: Split the collected X-ray machine video stream into two, connect one of the video streams to the X-ray machine, and connect the other video stream to the X-ray machine image acquisition workstation; S02: Initialize the X-ray machine image acquisition workstation and set the saved white background matching value to 0; S03: Select a corresponding decoding method for decoding according to the characteristics of the collected video stream; S04: Obtain the white background matching value under the current decoding mode; S05: Determine whether the white background matching value under the current decoding mode is greater than the white background clarity threshold; If the white background matching value under the current decoding mode is greater than or equal to the white background clarity threshold, then enter step S06; if the white background matching value under the current decoding mode is less than the white background clarity threshold, then determine whether the white background matching value under the current decoding mode is greater than the saved white background matching value; If the white background matching value under the current decoding mode is greater than or equal to the saved white background matching value, the saved white background matching value is set as the white background matching value under the current decoding mode, and steps S03 to S05 are repeated until all decoding modes are traversed, and step S06 is entered; if the white background matching value under the current decoding mode is less than the saved white background matching value, steps S03 to S05 are repeated until all decoding modes are traversed, and step S06 is entered; S06: setting the white background clarity threshold to the white background matching value under the current decoding mode; S07: Capture each frame at a specified resolution, and determine whether the white background matching value of each captured frame is less than a white background clarity threshold; If the white background matching value of the current frame is less than the white background clarity threshold, it means that the current frame contains the cargo image information scanned by the X-ray device, and the current frame is saved to the frame queue, and step S07 is repeated; if the white background matching value of the current frame is greater than or equal to the white background clarity threshold, it is determined whether the frame queue is empty; If the frame queue is empty, repeat step S07; if the frame queue is not empty, proceed to step S08; S08: All frames in the frame queue are removed from the queue one by one, and are spliced ​​into a complete cargo security inspection image from the earliest to the latest in the order of removal, and the image is saved.

10. The method according to claim 9, characterized in that: The white background matching value is defined as: the similarity between the RGB code when the X-ray machine video stream does not contain the cargo security inspection image and the RGB code of the white background; wherein, if the similarity is greater, the white background matching value is greater and the color difference is smaller; if the similarity is smaller, the white background matching value is smaller and the color difference is greater; The white background clarity threshold is defined as: the clarity of the white background displayed after the X-ray device video stream is decoded.

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