Intelligent seal device with three-dimensional hexahedral image structure and control method

Abstract

The invention discloses an intelligent seal device with a three-dimensional six-surface image structure and a control method, and the intelligent seal device comprises a front camera which is used for collecting an image of a file to be sealed so as to carry out file content verification; the lower camera is used for collecting the original imprint after the seal is stamped so as to verify the authenticity of the seal; the upper camera is used for collecting a face image of a seal operator so as to carry out identity verification; the three parts cooperate with each other to complete triple verification of an operator, authenticity of a print and file content, and collection of electronic certificates of'real person, real seal and real text '; the front camera, the left camera, the right camera and the tail camera synchronously record videos and collect all-around real environment data in the circumferential direction in the seal using process. By stamping timestamps on the'real person, real seal, real text 'and'real environment' electronic vouchers, 'real person, real seal, real text, real environment and real time 'seal electronic vouchers can be generated; and packaging and compressing the data to generate a hash value, and carrying out block chain storage, so that the hash value can be used as a seal electronic certificate compliance evidence.

Description

Technical Field

[0001] This invention relates to the field of intelligent seal technology, and in particular to an intelligent seal device and control method with a three-dimensional six-sided image structure. Background Technology

[0002] With the continuous development of smart seal technology, smart seals have been widely used in the market. Currently, smart seals are generally considered to be a system composed of three interacting components: a smart seal terminal, a seal management terminal, and a management backend. The seal management terminal and the management backend communicate to manage processes such as application and approval before use, and auditing, querying, and tracing after use. The interaction between the smart seal terminal and the management backend enables user identification, unlocking, sensing, monitoring, and alarm functions related to the seal's status during use. Most mainstream smart seal products are equipped with no more than three cameras, each performing a key function: one to capture a snapshot of the seal being used for evidence, one for user authentication via facial or fingerprint recognition, and one to collect a clear image of the seal impression for verification. However, this limited camera layout has significant spatial coverage limitations, particularly at the cylindrical tail of the seal and the edges on both sides, creating large blind spots. These blind spots mean that during the stamping process, the operator's hand movements, obstruction, and even critical parts of the document being stamped (such as the seams and edges) may not be effectively recorded. The consequences of this lack of information are serious. It provides opportunities for potential fraudulent activities (such as unauthorized stamping, stamping on blank documents, or operating in blind spots), greatly undermining the effectiveness and credibility of the "original evidence recording of stamping" claimed by smart seals, thus significantly diminishing their core value.

[0003] Therefore, to completely overcome the fundamental shortcomings of existing technologies in spatial monitoring, the field of smart seals urgently needs a revolutionary new technology. The core objective of this solution must be to achieve comprehensive, 360° all-around recording of the seal-using process, providing raw, unfiltered evidence. This means breaking free from the constraints of existing camera layouts and clearly and completely capturing the dynamic process of the entire annular space surrounding the seal (including the tail, sides, and the surface in contact with the document), ensuring that no action or detail escapes monitoring. Only in this way can the entire seal-using process be truly transparent, fully visualized, and highly reliable traceable, fundamentally eliminating the risk of fraud and reshaping the smart seal's status as a trustworthy risk control tool. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology. To achieve the above objective, an intelligent stamp device and control method with a three-dimensional six-sided image structure are adopted to solve the problems mentioned in the background technology.

[0005] The first aspect of the technical solution: A smart seal device with a three-dimensional six-sided image structure, including a front camera, a lower camera, an upper camera, a left camera, a right camera, and a rear camera;

[0006] The front-facing camera is located in the document acquisition area below the front of the seal, and is used to acquire images of the documents to be stamped in order to acquire electronic vouchers and verify the content of the documents.

[0007] The lower camera is located at the bottom of the seal and is used to capture the original imprint after the seal is stamped in order to collect electronic credentials of the real seal and verify the authenticity of the seal at the same time.

[0008] The upper-mounted camera is set at the top of the seal and is used to capture the facial image of the operator to realize the collection of electronic credentials of real persons and at the same time to verify the identity of the operator.

[0009] The left-side camera, right-side camera, and rear-side camera are respectively positioned around the perimeter of the seal.

[0010] The front-facing camera, the lower-facing camera, and the upper-facing camera work together to collect electronic credentials for the operator's identity, the authenticity of the seal, and the content of the document, and are used for triple synchronous verification.

[0011] The front-facing camera, left-facing camera, right-facing camera, and rear-facing camera start recording simultaneously, and the collected video data is synthesized to generate a circumferential panoramic environmental video of the printing process.

[0012] As a further aspect of the present invention, it also includes a high / low position detection module for detecting the position of the stamp pressing down onto the paper surface;

[0013] The high / low position detection module determines whether to trigger synchronous recording of the front camera, left camera, right camera, and rear camera.

[0014] As a further aspect of the present invention: when the high-position sensor switch in the high-low position detection module is OFF, the front camera, left camera, right camera, and rear camera start recording; when the high-position sensor switch is ON, the front camera, left camera, right camera, and rear camera stop recording.

[0015] The high / low position detection module triggers the opening and closing of the lower camera; when the high position sensor switch in the high / low position detection module is ON and the low position sensor switch is OFF, the lower camera starts collecting data; when the high position sensor switch in the high / low position detection module is OFF, the lower camera stops recording data.

[0016] As a further aspect of the present invention: the left-side camera, the right-side camera, and the tail-side camera are arranged in a ring around the seal to cover the horizontal circumferential view of the seal-using environment.

[0017] As a further aspect of the present invention: the front camera, the bottom camera, the top camera, the left camera, the right camera, and the rear camera are all wide-angle cameras with more than 1 million pixels.

[0018] The second aspect of the technical solution: A control method for an intelligent seal device with a three-dimensional six-sided image structure as described in any of the above claims, comprising the following steps:

[0019] Step S1, Content Verification: Capture images of each page of the document to be printed using the front-facing camera, and compare them with the pre-stored file using OCR. If the comparison matches, proceed to Step S2.

[0020] Step S2, Operator Identity Verification: The operator's facial image is captured by the upper-mounted camera and compared with the registered facial information. Once the verification is successful, the operator's seal-using permission is unlocked.

[0021] Step S3, Real-time Acquisition: When the stamp is detected to be moving away from the high position and pressed down, that is, when the high position sensor switch in the high and low position detection module is OFF, the front camera, left camera, right camera and tail camera will start recording simultaneously to acquire environmental video until the stamp is returned to its position. When the high position sensor switch is ON, the recording of the front camera, left camera, right camera and tail camera will stop.

[0022] Step S4, Seal Authenticity Verification: When the high-position sensor switch in the high-low position detection module is ON, the lower camera begins to capture the seal imprint (when the high-position sensor switch in the high-low position detection module is OFF, the lower camera stops recording and capturing images), and compares the similarity with the pre-stored imprint. The specific steps are as follows:

[0023] After preprocessing the acquired imprint images, a coordinate transformation is performed, converting the image's rectangular coordinates to the polar coordinate system at the image origin. The grayscale values ​​of the acquired imprint images are then calculated in the polar coordinate system. Based on the calculated grayscale values, the Euclidean distance between the grayscale values ​​of the real imprint and the imprint to be identified is calculated. The obtained Euclidean distance is compared with a preset threshold of the system. Based on the comparison result, the authenticity of the imprint is determined. If the set threshold is met, it is determined to be a valid verification imprint.

[0024] Step S5, Audit Storage: If the verification of document content, operator identity, seal authenticity, and environmental video analysis all pass and the environmental video shows no abnormalities, then a timestamp is added, the data is compressed and packaged for storage, realizing the five practical electronic voucher data of "real person, real seal, real document, real environment, and real time". The hash value is extracted and uploaded to the blockchain for storage to prevent tampering. It can be used as a compliant voucher for electronic seal use.

[0025] As a further aspect of the present invention: in step S1, if the OCR comparison is inconsistent, the stamping is terminated and a message indicating that the document content is inconsistent is displayed.

[0026] As a further aspect of the present invention: the specific steps in step S3 are as follows: real-time analysis of the collected environmental video, including:

[0027] Edge detection algorithms are used to identify changes in the contours of objects in a video;

[0028] An image mutation detection algorithm is used to identify abnormal content in the image.

[0029] If an abnormal change is detected, the abnormal location is marked in the video and a fraud warning is generated, and the use of the seal is deemed invalid.

[0030] The anomaly detection in the environmental video includes identifying paper replacement, the presence of obstructions, or abnormal proximity of people.

[0031] As a further aspect of the present invention: in step S4, if the similarity of the imprint is lower than a set threshold, the imprint is deemed invalid and a message indicating that the imprint does not match is displayed.

[0032] As a further aspect of the present invention: in step S5, the environmental video synthesis process involves fusing the video streams from four cameras into a single panoramic view video using a spatiotemporal alignment algorithm.

[0033] Compared with the prior art, the present invention has the following technical advantages:

[0034] By employing the aforementioned technical solution, a four-step verification loop is executed sequentially: a front-facing camera captures document images for content verification; a lower-facing camera captures the original imprint to verify the authenticity of the seal; and an upper-facing camera identifies the operator's biometric features. Combined with a ring-shaped distribution of left, right, and tail cameras simultaneously recording environmental video, and triggered by the high and low position detection module, the process sequentially executes: "document content → operator identity → environmental anomaly detection → imprint authenticity." Through a three-dimensional collaborative mechanism of "hardware-oriented optimization - verification time-series closed loop - deep algorithm integration," real-time mapping between the physical world of seal application and digital evidence is achieved, shifting seal security from passive defense to proactive risk prevention. Attached Figure Description

[0035] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0036] Figure 1 This is a schematic diagram of the structure of the intelligent seal device according to an embodiment of this application;

[0037] Figure 2 This is a system connection diagram of the intelligent seal device according to an embodiment of this application;

[0038] Figure 3 This is a perspective view of the intelligent seal device according to an embodiment of this application;

[0039] Figure 4 This is a bottom view of the intelligent seal device according to an embodiment of this application;

[0040] Figure 5 This is a top view of the smart seal device according to an embodiment of this application.

[0041] In the diagram, 1 is the front-facing camera; 2 is the bottom-facing camera; 3 is the top-facing camera; 4 is the left-facing camera; 5 is the right-facing camera; 6 is the rear-facing camera; 7 is the fingerprint module; 8 is the power supply module; and 9 is the Wi-Fi antenna module. Detailed Implementation

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] Please refer to Figure 1 In this embodiment of the invention, the first aspect of the technical solution is: an intelligent seal device with a three-dimensional six-sided image structure, including a front camera 1, a lower camera 2, an upper camera 3, a left camera 4, a right camera 5, and a rear camera 6.

[0044] The front-facing camera 1 is located in the document acquisition area below the front of the seal. It can achieve clear visibility of the seal text within the maximum range. With a wide-angle lens of over 1 million pixels, it is used to acquire images of the documents to be sealed in order to achieve the acquisition of "real text" electronic vouchers. At the same time, it can also verify the content of the documents.

[0045] The lower camera 2 is located at the bottom of the seal. It has a wide-angle lens with more than 1 million pixels and can clearly see the imprint within the maximum range. It is used to collect the original imprint after the seal is stamped to realize the collection of "real seal" electronic certificate, and can also verify the authenticity of the seal.

[0046] The upper camera 3 is set on the top of the seal. It has a wide-angle lens with more than 1 million pixels and can clearly see the user of the seal over the largest area. It is used to collect the facial image of the operator of the seal to realize the collection of "real person" electronic certificate, and at the same time, it can verify the identity of the operator.

[0047] The left-side camera 4, right-side camera 5, and rear-side camera 6, all with wide-angle lenses and over 1 million pixels, can achieve clear visibility of the printed text within the maximum range, and are respectively set around the perimeter of the seal.

[0048] The front-facing camera 1, the lower-facing camera 2, and the upper-facing camera 3 work together to collect the "real text, real seal, real person" electronic credentials of the operator's identity, the authenticity of the seal, and the content of the document, and can also be used for triple synchronous verification.

[0049] The front-facing camera 1, left-facing camera 4, right-facing camera 5, and rear-facing camera 6 are activated simultaneously. The video data collected is synthesized and processed to generate a panoramic video recording of the stamping process, which is also known as the collection of "real-world" electronic vouchers for stamping.

[0050] The above-mentioned "real text, real seal, real person" electronic vouchers, combined with "real environment" electronic vouchers, form "real text, real seal, real person, real environment" electronic vouchers. Further, timestamps are added to the "real text, real seal, real person, real environment" to form "real text, real seal, real person, real environment, real time" electronic voucher data. The above data is compressed and packaged, a hash value is generated, and uploaded to the blockchain server to prevent data tampering. This data can serve as a compliant data certificate for electronic vouchers.

[0051] In specific embodiments, such as Figure 2 The diagram shows the system connection of the smart seal device; the main components of the system are shown in the diagram.

[0052] The sensing module includes cameras distributed in six positions (front camera 1, lower camera 2, upper camera 3, left camera 4, right camera 5, and rear camera 6), a fingerprint module 7, and proximity sensors (near and far ends) for distance detection. These cameras are connected to the CPU module via MIPI CSI interfaces (CSI0-CSI5), and the fingerprint module 7 is connected to the CPU module via UART1.

[0053] Communication module: Includes a WIFI antenna module 9 and a 4G antenna module, providing wireless connectivity for the device. Storage module: Includes internal storage (4GB RAM + 64GB ROM) and external storage (128GB, possibly referring to an expansion card).

[0054] Human-computer interaction module: Display screen assembly (DS1). Power supply module 8: Provides power to the entire system.

[0055] Actuator: Smart lock (connected to Hi drive axle).

[0056] Physical interface: Includes UART2 and USB group for external communication or expansion.

[0057] Physical fixation: Head rotary clamp (connected to Hi drive axle).

[0058] Connection Summary: All sensing components (camera, fingerprint sensor), communication modules (WiFi / 4G), storage (built-in / external), display, smart lock, physical interfaces (UART / USB), and physical fixtures are directly or indirectly connected to the central CPU module. The camera connects via a specific MIPI CSI channel; the interface types for other modules are not explicitly labeled in the diagram. Power module 8 provides power to the entire system.

[0059] In this embodiment, a high / low position detection module is also included to detect the position of the stamp pressing down onto the paper surface.

[0060] The high / low position detection module triggers the synchronous start and stop of the front camera 1, left camera 4, right camera 5, and rear camera 6.

[0061] Specifically, when the high-position sensor switch in the high-low position detection module is OFF, the front camera 1, left camera 4, right camera 5, and rear camera 6 start recording; when the high-position sensor switch is ON, the front camera 1, left camera 4, right camera 5, and rear camera 6 stop recording.

[0062] The high / low position detection module determines whether the lower camera 2 is triggering recording. When the high position sensor switch in the high / low position detection module is ON, the lower camera 2 starts recording. When the high position sensor switch in the high / low position detection module is OFF, the lower camera 2 stops recording.

[0063] like Figure 3 The diagram shown is a 3D view of the intelligent stamp device.

[0064] In this embodiment, the left-side camera 4, the right-side camera 5, and the rear-side camera 6 are arranged in a ring around the seal to cover the horizontal circumferential view of the seal-printing environment.

[0065] The front camera 1, bottom camera 2, top camera 3, left camera 4, right camera 5, and rear camera 6 are all wide-angle cameras with over 1 million pixels.

[0066] In a specific implementation, the front camera 1 can be set to 13 megapixels, while the lower camera 2, upper camera 3, left camera 4, right camera 5, and rear camera 6 can all be wide-angle 5 megapixels, so as to collect clearer image information in three dimensions and multiple directions.

[0067] like Figure 4 As shown, the diagram is a bottom view of the smart stamp device; the diagram shows the specific camera ranges of the front camera 1, the bottom camera 2, the top camera 3, the left camera 4, the right camera 5, and the rear camera 6.

[0068] like Figure 5 As shown, the illustration is a top view of the smart stamp device.

[0069] Specifically, in a document-using scenario, the front-facing camera 1 takes a vertical shot from 15cm away from the document. When the operator places the document, the camera automatically captures an image of the ticket (resolution 2592×1944), and uses a distortion correction algorithm to eliminate edge distortion from the wide-angle lens. Then, key fields such as the ticket number and amount are extracted and compared with pre-stored information in the system using OCR. If text tampering is detected, an audible and visual alarm is immediately triggered, and the seal is locked.

[0070] Specifically, the top-mounted camera 3 captures the operator's face at 30fps. In strong backlight conditions, HDR mode is activated, and liveness detection confirms it is not a photocopy. Once the system identifies a 99.2% similarity between the certified personnel and the registered face, the lock automatically removes the seal restriction.

[0071] Specifically, when signing a contract, the left-side camera 4 and the right-side camera 5 cover both sides of the stamping area at a 90° angle. When someone is detected reaching out from the left to block the seal, the algorithm model identifies and marks the hand outline in real time, and simultaneously activates the seal head retraction protection mechanism.

[0072] The second aspect of the technical solution: A control method for an intelligent seal device with a three-dimensional six-sided image structure, including any of the above-mentioned features, comprising the following steps:

[0073] Step S1, Content Verification: Capture images of each page of the document to be printed using the front-facing camera 1, and compare them with the pre-stored file using OCR. If the comparison matches, proceed to step S2.

[0074] Step S2, Operator Identity Verification: The operator's facial image is captured by the upper camera 3 and compared with the registered facial information. Once the verification is successful, the operator's right to use the seal is unlocked.

[0075] Step S3, Real-time Acquisition: When the stamp is detected to be pressed down, i.e., when the high position sensor switch in the high and low position detection module is OFF, the front camera 1, left camera 4, right camera 5 and tail camera 6 start recording video simultaneously, acquiring environmental video until the stamp is returned to its position. When the high position sensor switch is ON, the recording acquisition of the front camera 1, left camera 4, right camera 5 and tail camera 6 stops.

[0076] Step S4, Seal Authenticity Verification: When the high-position sensor switch in the high-low position detection module is ON, the lower camera 2 begins to collect the seal imprint (when the high-position sensor switch in the high-low position detection module is OFF, the lower camera 2 stops recording and collecting data), and compares the similarity with the pre-stored imprint. The specific steps are as follows:

[0077] After preprocessing the acquired imprint images, a coordinate transformation is performed, converting the image's rectangular coordinates to the polar coordinate system at the image origin. The grayscale values ​​of the acquired imprint images are then calculated in the polar coordinate system. Based on the calculated grayscale values, the Euclidean distance between the grayscale values ​​of the real imprint and the imprint to be identified is calculated. The obtained Euclidean distance is compared with a preset threshold of the system. Based on the comparison result, the authenticity of the imprint is determined. If the set threshold is met, it is determined to be a valid verification imprint.

[0078] Step S5, Audit Storage: If the verification of document content, operator identity, seal authenticity, and environmental video analysis all pass and the environmental video shows no abnormalities, then a timestamp is added, the data is compressed and packaged for storage, realizing the five practical electronic voucher data of "real person, real seal, real document, real environment, and real time". The hash value is extracted and uploaded to the blockchain for storage to prevent tampering. It can be used as a compliant voucher for electronic seal use.

[0079] In this embodiment, if the OCR comparison is inconsistent in step S1, the stamping process is terminated and a message indicating that the document content does not match is displayed.

[0080] In this embodiment, the specific steps in step S3 are as follows: real-time analysis of the collected environmental video, including:

[0081] Edge detection algorithms are used to identify changes in the contours of objects in a video;

[0082] An image mutation detection algorithm is used to identify abnormal content in the image.

[0083] If an abnormal change is detected, the abnormal location is marked in the video and a fraud warning is generated, and the use of the seal is deemed invalid.

[0084] Anomaly detection in environmental video includes identifying paper replacement, the presence of obstructions, or unusual proximity of people.

[0085] Specifically, during the hospital medical record stamping process, when the high / low position detection module detects the stamp contacting the paper:

[0086] The left / right cameras detected someone reaching out to block the view;

[0087] The rear-mounted camera 6 captures the paper's movement;

[0088] The system urgently raised and marked the video evidence within 200ms;

[0089] In this embodiment, in step S4, if the similarity of the imprint is lower than the set threshold, the imprint is determined to be invalid and a message indicating that the imprint does not match is displayed.

[0090] In this embodiment, in step S5, the environmental video synthesis process involves fusing the video streams from the four cameras into a single panoramic view video using a spatiotemporal alignment algorithm.

[0091] The following describes the working principle and process of the embodiments disclosed in this invention:

[0092] The specific implementation steps involve the following control methods, which can achieve the use of seals "real person, real seal, real document, real environment".

[0093] Verification of the document to be stamped is performed. Before stamping, the front-facing camera 1 is used to collect the data file to be stamped, capturing each page of the file and comparing it with each page of the submitted WORD document using OCR. If the two match, proceed to the next step; otherwise, a message will be displayed indicating that the content does not match and stamping is not permitted.

[0094] The process begins with verifying the identity of the person using the seal. After the "real text" verification is successful, the upper-mounted camera 3 captures the applicant's face and compares it with the face of the registered applicant. If they match, the smart seal control lock is activated, and the seal is pressed down to proceed to the next step. Otherwise, a message is displayed indicating that the person collecting the seal does not match the applicant, the seal is refused, and a request for re-verification of the face is made.

[0095] Real-time stamping data collection is performed. When the stamp pressure is detected by the high / low position detection module (i.e., when the high-position sensor switch in the high / low position detection module is OFF), recording begins from the front camera 1, left camera 4, right camera 5, and rear camera 6 to capture the stamping environment natively. Recording from these four cameras stops when the high / low position detection module detects that the stamping process has completed and returned to its original position. Then, edge detection algorithms and image abrupt change detection algorithms are used to process the video footage from the four cameras. If any abnormalities such as image or edge changes are detected during the stamping process, an error is indicated on the video, and a warning is issued. This indicates that the stamping may involve fraudulent activities such as paper swapping, and the stamping process is deemed invalid and terminated. Otherwise, proceed to the next step.

[0096] Verify the use of the seal. After the original seal usage environment is captured and detected, and the seal is returned to its original position, the lower camera 2 captures the original seal imprint. The original seal imprint is then compared with the imprints in the registered database. If the similarity meets the set requirements, it indicates that the seal usage is valid. Otherwise, a message indicates that the imprint does not match, and the seal usage is invalid. Proceed to the next step.

[0097] Audit of this seal usage: This seal usage meets the requirements of "real person, real seal, real document, and real environment," and there was no fraudulent activity such as substitution during the seal usage process. This seal usage audit is valid. A video of the original environment used for this seal usage is stored for review and retrieval. This seal usage audit is now complete.

[0098] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents, all of which should be included within the scope of protection of the invention.

Claims

1. A smart stamp device with a three-dimensional six-sided image structure, characterized in that, It includes a front-facing camera (1), a bottom-facing camera (2), a top-facing camera (3), a left-facing camera (4), a right-facing camera (5), and a rear-facing camera (6); The front-facing camera is located in the document acquisition area below the front of the seal, and is used to acquire images of the documents to be stamped in order to acquire electronic vouchers and verify the content of the documents. The lower camera is located at the bottom of the seal and is used to capture the original imprint after the seal is stamped in order to collect electronic credentials of the real seal and verify the authenticity of the seal at the same time. The upper-mounted camera is set at the top of the seal and is used to capture the facial image of the operator to realize the collection of electronic credentials of real persons and at the same time to verify the identity of the operator. The left-side camera, right-side camera, and rear-side camera are respectively positioned around the perimeter of the seal. The front-facing camera, the lower-facing camera, and the upper-facing camera work together to collect electronic credentials for the operator's identity, the authenticity of the seal, and the content of the document, and are used for triple synchronous verification. The front-facing camera, left-facing camera, right-facing camera, and rear-facing camera record video synchronously, and the collected video data is synthesized to generate a circumferential panoramic environmental video of the printing process.

2. The intelligent seal device with a three-dimensional six-sided image structure according to claim 1, characterized in that, It also includes a stamp height and low position detection module, which is used to detect the position of the stamp pressing down on the paper surface; The high / low position detection module determines whether to trigger synchronous recording of the front camera, left camera, right camera, and rear camera.

3. The intelligent seal device with a three-dimensional six-sided image structure according to claim 1, characterized in that, When the high-position sensor switch in the high-low position detection module is OFF, the front camera, left camera, right camera, and rear camera start recording; when the high-position sensor switch is ON, the front camera, left camera, right camera, and rear camera stop recording. The high / low position detection module determines whether the lower-mounted camera triggers recording. When the high-position sensor switch in the high-low position detection module is ON and the low-position sensor switch is OFF, the lower camera starts capturing data; when the high-position sensor switch in the high-low position detection module is OFF, the lower camera stops recording data.

4. The intelligent seal device with a three-dimensional six-sided image structure according to claim 1, characterized in that, The left-side camera, right-side camera, and tail-side camera are arranged in a ring around the seal to cover the horizontal circumferential view of the seal-using environment.

5. The intelligent seal device with a three-dimensional six-sided image structure according to claim 4, characterized in that, The front-facing camera, bottom-facing camera, top-facing camera, left-facing camera, right-facing camera, and rear-facing camera are all wide-angle lenses with over 1 million pixels.

6. A control method for an intelligent seal device with a three-dimensional six-sided image structure as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Step S1, Content Verification: Capture images of each page of the document to be printed using the front-facing camera, and compare them with the pre-stored file using OCR. If the comparison matches, proceed to Step S2. Step S2, Operator Identity Verification: The operator's facial image is captured by the upper-mounted camera and compared with the registered facial information. Once the verification is successful, the operator's seal-using permission is unlocked. Step S3, Real-time Acquisition: When the stamp is detected to be moving away from the high position and pressed down, that is, when the high position sensor switch in the high and low position detection module is OFF, the front camera, left camera, right camera and tail camera will start recording and acquiring environmental video simultaneously until the stamp is returned to its position, that is, when the high position sensor switch is ON, the recording and acquisition of the front camera, left camera, right camera and tail camera will stop. Step S4, Seal Authenticity Verification: When the high-position sensor switch in the high-low position detection module is ON, the lower camera begins to capture the seal imprint (when the high-position sensor switch in the high-low position detection module is OFF, the lower camera stops recording and capturing images), and compares the similarity with the pre-stored imprints. The specific steps are as follows: After preprocessing the acquired imprint images, a coordinate transformation is performed, converting the image's rectangular coordinates to the polar coordinate system at the image origin. The grayscale values ​​of the acquired imprint images are then calculated in the polar coordinate system. Based on the calculated grayscale values, the Euclidean distance between the grayscale values ​​of the real imprint and the imprint to be identified is calculated. The obtained Euclidean distance is compared with a preset threshold of the system. Based on the comparison result, the authenticity of the imprint is determined. If the set threshold is met, it is determined to be a valid verification imprint. Step S5, Audit Storage: If the verification of document content, operator identity, seal authenticity, and environmental video analysis all pass and the environmental video shows no abnormalities, then a timestamp is added, the data is compressed and packaged for storage, realizing the five practical electronic voucher data of "real person, real seal, real document, real environment, and real time". The hash value is extracted and uploaded to the blockchain for storage to prevent tampering. It can be used as a compliant electronic voucher for use with seals.

7. The control method for an intelligent seal device with a three-dimensional six-sided image structure according to claim 6, characterized in that, In step S1, if the OCR comparison is inconsistent, the stamping process will be terminated and a message indicating that the document content does not match will be displayed.

8. The control method for an intelligent seal device with a three-dimensional six-sided image structure according to claim 6, characterized in that, The specific steps in step S3 are as follows: real-time analysis of the collected environmental video, including: Edge detection algorithms are used to identify changes in the contours of objects in a video; An image mutation detection algorithm is used to identify abnormal content in the image. If an abnormal change is detected, the abnormal location is marked in the video and a fraud warning is generated, and the use of the seal is deemed invalid. The anomaly detection in the environmental video includes identifying paper replacement, the presence of obstructions, or abnormal proximity of people.

9. The control method for an intelligent seal device with a three-dimensional six-sided image structure according to claim 6, characterized in that, In step S4, if the similarity of the imprint is lower than the set threshold, the imprint is deemed invalid and a message indicating that the imprint does not match is displayed.

10. The control method for an intelligent seal device with a three-dimensional six-sided image structure according to claim 6, characterized in that, In step S5, the environmental video synthesis process involves fusing the video streams from the four cameras into a single panoramic view video using a spatiotemporal alignment algorithm.

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