Video tampering detection method and device based on signal-to-noise ratio imbalance

Abstract

The invention discloses a video tampering detection method and device based on signal-to-noise ratio imbalance, and relates to the technical field of video tampering detection device.The device comprises video tampering detection equipment, a ventilation opening is formed in the outer surface of the video tampering detection equipment, and a mounting groove is formed in the outer surface of the video tampering detection equipment; the inner wall of the mounting groove is provided with an interface, the interior of the mounting groove is provided with a detection auxiliary assembly used for reducing errors caused by manual operation, and the interior of the mounting groove is provided with a protection assembly used for improving the safety and automation level of the video tampering detection equipment; according to the video tampering detection device, the USB flash disk can be automatically inserted and pulled out, errors caused by manual operation are reduced through automatic operation, the detection accuracy is improved, a user does not need to manually insert and pull out the USB flash disk, the USB flash disk can be automatically inserted and pulled out only by putting the USB flash disk into the placing plate, and the safety and the automation level of the video tampering detection device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of video tampering detection devices, and in particular to a video tampering detection method and device based on signal-to-noise ratio imbalance. Background Art

[0002] With the widespread application of digital video technology, the security and integrity of video content have received increasing attention. Video tampering phenomena, such as editing, splicing, and forgery, have become a major challenge in the field of information security. Signal-to-noise ratio is an important indicator for measuring signal quality. It represents the ratio of useful information to noise in the signal. In video signals, a high signal-to-noise ratio means that the video content is clear and of high quality, while a low signal-to-noise ratio may indicate poor video quality or tampering. Video tampering usually causes an imbalance in the signal-to-noise ratio of the video signal, that is, a change in the ratio of useful information to noise. This change may be due to incorrect processing, data loss, or artificial interference during the tampering process. In order to ensure the authenticity and reliability of video content, it is necessary to develop effective video tampering detection technology. The detection method based on signal-to-noise ratio imbalance is a common detection method because it can capture the changes in signal characteristics generated during the tampering process. The detection method based on signal-to-noise ratio imbalance can capture the universal changes in signal characteristics generated during the tampering process and has good adaptability to various types of tampering.

[0003] Before the video tampering detection device detects, it is necessary to use a USB flash drive to import the video to be detected into the device. Nowadays, the USB flash drive is usually manually inserted and unplugged from the device by the user. However, this method has some shortcomings. When the user inserts the USB flash drive into the device socket, the USB flash drive needs to be aligned with the socket. If the user uses too much force or uses an improper angle when inserting the USB flash drive into the socket, the interface of the USB flash drive or the USB port may be damaged. After installation, most of the USB flash drive will protrude outside the device. The protruding USB flash drive is susceptible to physical impact or accidental pulling, resulting in damage to the USB flash drive or data. The protruding USB flash drive interface is prone to dust accumulation and is not conducive to waterproof design, which will affect the long-term stable operation of the device.

[0004] Therefore, the present invention proposes a video tampering detection method and device based on signal-to-noise ratio imbalance to improve the shortcomings of traditional technology, can safely import the video to be detected, realize automatic insertion and removal of USB flash drives, improve the security and automation level of the video tampering detection device, and solve the inconvenience and potential problems brought about by the existing USB flash drive installation method. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a video tampering detection method and device based on signal-to-noise ratio imbalance, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a video tampering detection method based on signal-to-noise ratio imbalance, comprising the following steps:

[0007] Step 1: Prepare the video file to be tested and store it in a USB flash drive. Place the USB flash drive inside the component, start the component, and insert it into the device accurately and smoothly.

[0008] Step 2: Import the video file into the device via a USB drive, start the detection process, and the software will automatically start analyzing the video frames;

[0009] Step 3: The software extracts the video content frame by frame, performs signal-to-noise ratio analysis on each frame, calculates the signal-to-noise ratio of each frame, and records its statistical features, extracts the mean, standard deviation and distribution of the signal-to-noise ratio, uses an algorithm to analyze the features, and detects abnormal situations where the signal-to-noise ratio is unbalanced;

[0010] Step 4: The video tampering detection device will mark the detected tampered area or frame and generate a detection report, including the location, type, and degree of tampering;

[0011] Step 5: Manually review the detected tampering to verify the accuracy of the detection results, adjust the detection parameters according to the review results to improve the accuracy of the detection, and after completing all detection tasks, turn off the video tampering detection device and start the component to automatically unplug the USB flash drive.

[0012] A video tampering detection method and device based on signal-to-noise ratio imbalance include a video tampering detection device, wherein the outer surface of the video tampering detection device is provided with a vent, the outer surface of the video tampering detection device is provided with a mounting groove, the inner wall of the mounting groove is provided with an interface, the interior of the mounting groove is provided with a detection auxiliary component for reducing errors caused by human operation, and the interior of the mounting groove is provided with a protective component for improving the safety and automation level of the video tampering detection device.

[0013] Preferably, the detection auxiliary component includes a cylinder, the inner wall of the mounting groove is provided with a parallel slide groove, the outer surface of the cylinder is fixedly connected to the inner wall of the parallel slide groove, the end of the cylinder close to the interface is fixedly connected to an auxiliary plate, the auxiliary plate slides inside the parallel slide groove, the end of the auxiliary plate away from the cylinder is fixedly connected to a placement plate, the inner wall of the placement plate is provided with a square groove, a reciprocating screw rod is rotatably connected to the inside of the placement plate, the outer surface of the reciprocating screw rod is symmetrically threaded with a clamping plate, the outer surface of the placement plate is rotatably connected to a gear, a belt is transmission-connected between the outer surface of the reciprocating screw rod and the outer surface of the gear, the bottom of the gear is meshingly connected with a rack, and the inner wall of the placement plate is movably connected to a U disk.

[0014] Preferably, the reciprocating screw is located inside the square groove, the two clamping plates slide symmetrically inside the square groove, and rubber pads are provided on the sides of the two clamping plates that are close to each other.

[0015] Preferably, one end of the rack away from the placement plate is fixedly connected to the inner wall of the mounting groove.

[0016] Preferably, the protective component includes a movable plate, the upper surface of the movable plate is fixedly connected to the bottom of the placement plate, the outer surface of the movable plate is symmetrically provided with irregular sliding grooves, the interior of the irregular sliding grooves is symmetrically slidably connected with cylindrical sliding rods, the bottoms of two cylindrical sliding rods are fixedly connected with square sliding bars, the inner wall of the mounting groove is fixedly connected with a fixed column, and the ends of the two square sliding bars away from the interface are fixedly connected with a closing plate.

[0017] Preferably, the irregular chute consists of a vertical section and an inclined section.

[0018] Preferably, the two square slide bars both slide on the outer surface of the fixed column.

[0019] The video tampering detection device based on signal-to-noise ratio imbalance provided by the present invention has the following beneficial effects:

[0020] 1. Through the coordinated use of the cylinder, the auxiliary plate and the placement plate, the automatic insertion and removal of the U disk can be realized. The automated operation reduces the error caused by human operation and improves the accuracy of detection. The user does not need to manually insert and remove the U disk. He only needs to put the U disk into the placement plate to automatically complete the insertion and removal. The operation is simple and convenient. The placement plate is driven to enter the video tampering detection device through the movement of the auxiliary plate, so that there are no protruding parts of the placement plate and the U disk. The U disk is placed in the placement plate as a whole to avoid physical impact or accidental pulling due to the protrusion of the U disk, thereby avoiding damage to the U disk or data. By using the placement plate to protect the U disk and the U disk has no exposed parts during the video tampering detection process, the U disk can be prevented from being accidentally pulled out during the detection process, thereby avoiding data loss and inaccurate results of video tampering detection.

[0021] 2. Through the coordinated use of reciprocating screw rods, gears, racks and clamping plates, the placement plate can clamp and fix the U disk in the process of driving the U disk to plug and unplug. The clamping process of the two clamping plates on the U disk can automatically position it to a position parallel to the interface, so that the U disk can be accurately inserted into the interface, and the position of the U disk can be accurately controlled to ensure that the U disk is always in the correct position during the detection process, thereby improving the accuracy of the detection. The clamping design can effectively prevent the U disk from loosening or falling off due to vibration or external force during the plugging and unplugging process, ensuring a stable connection. Through the setting of gears and belts, the rotation of the gears can indirectly drive the rotation of the reciprocating screw rod, and the gear and rack can be meshed in a limited space when the U disk is completely pulled out of the interface so that the clamping plate does not clamp it, and it can be positioned and clamped before the U disk is inserted into the interface, ensuring accurate positioning before the U disk is inserted and the U disk is driven to be pulled out when the placement plate moves outward.

[0022] 3. Through the coordinated use of protective components, the closing plate moves to close the opening of the mounting slot when the placement plate drives the U disk to insert into the interface; the closing plate moves to open the opening of the mounting slot when the placement plate drives the U disk to pull out of the interface. During detection, closing the opening of the mounting slot can prevent external interference and ensure the safety of the detection process. The automatic closing design can prevent dust, foreign matter, etc. from entering the U disk and protect the U disk from damage. Closing the opening of the mounting slot can reduce the interference of external factors on the detection results and improve the accuracy of the detection. Through the design of the irregular slide vertical section and the inclined section, the closing plate can fully open the opening of the placement plate before it moves out of the opening of the mounting slot, which can avoid the collision of the placement plate with the closing plate during the removal or insertion process and reduce the risk of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a three-dimensional bottom view of the overall structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the installation slot position structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the auxiliary plate position structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the detection auxiliary component of the present invention;

[0028] Figure 6 It is a schematic diagram of the local structure of the detection auxiliary component of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the protection component of the present invention;

[0030] Figure 8This is a schematic diagram of the bottom structure of the protection component of the present invention;

[0031] Fig. 9 It is a schematic diagram of the local structure of the protection component of the present invention.

[0032] The numbers in the figure represent:

[0033] 1. Video tampering detection equipment; 2. Ventilation port; 3. Mounting slot; 4. Interface;

[0034] 5. Detection auxiliary components; 51. Cylinder; 52. Auxiliary plate; 53. Placement plate; 54. Reciprocating screw rod; 55. Clamp; 56. Belt; 57. Gear; 58. Rack; 59. Square slot; 510. U disk;

[0035] 6. Protective assembly; 61. Moving plate; 62. Irregular slide groove; 63. Cylindrical slide stick; 64. Square slide bar; 65. Fixed column; 66. Closing plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0037] Embodiment 1

[0038] A video tampering detection method based on signal-to-noise ratio imbalance includes the following steps:

[0039] Step 1: Prepare the video file to be tested and store it in a USB flash drive. Place the USB flash drive inside the component, start the component, and insert it into the device accurately and smoothly.

[0040] Step 2: Import the video file into the device via a USB drive, start the detection process, and the software will automatically start analyzing the video frames;

[0041] Step 3: The software extracts the video content frame by frame, performs signal-to-noise ratio analysis on each frame, calculates the signal-to-noise ratio of each frame, and records its statistical features, extracts the mean, standard deviation and distribution of the signal-to-noise ratio, uses an algorithm to analyze the features, and detects abnormal situations where the signal-to-noise ratio is unbalanced;

[0042] Step 4: The video tampering detection device will mark the detected tampered area or frame and generate a detection report, including the location, type, and degree of tampering;

[0043] Step 5: Manually review the detected tampering to verify the accuracy of the detection results, adjust the detection parameters according to the review results to improve the accuracy of the detection, and after completing all detection tasks, turn off the video tampering detection device and start the component to automatically unplug the USB flash drive.

[0044] Embodiment 2

[0045] refer to Figures 1 to 9 As shown, a preferred embodiment of the present invention will be described in detail below:

[0046] A video tampering detection device based on signal-to-noise ratio imbalance includes a video tampering detection device 1, a ventilation hole 2 is provided on the outer surface of the video tampering detection device 1, a mounting groove 3 is provided on the outer surface of the video tampering detection device 1, an interface 4 is provided on the inner wall of the mounting groove 3, a detection auxiliary component 5 for reducing errors caused by human operation is arranged inside the mounting groove 3, and a protective component 6 for improving the safety and automation level of the video tampering detection device 1 is arranged inside the mounting groove 3.

[0047] The detection auxiliary component 5 includes a cylinder 51, the output end of the cylinder 51 is fixedly connected to the auxiliary plate 52, the inner wall of the installation groove 3 is provided with a parallel slide groove, the outer surface of the cylinder 51 is fixedly connected to the inner wall of the parallel slide groove, the end of the cylinder 51 close to the interface 4 is fixedly connected to the auxiliary plate 52, the auxiliary plate 52 slides inside the parallel slide groove, and the end of the auxiliary plate 52 away from the cylinder 51 is fixedly connected to the placement plate 53. Through the coordinated use of the cylinder 51, the auxiliary plate 52 and the placement plate 53, the automatic insertion and removal of the U disk 510 is realized. The automated operation reduces the error caused by human operation and improves the accuracy of the detection. The user does not need to manually plug and unplug, and only needs to insert the U disk 5 10 is placed inside the placement plate 53, and the plugging and unplugging can be automatically completed. The operation is simple and convenient. The placement plate 53 is driven by the movement of the auxiliary plate 52 to enter the video tampering detection device 1, so that the placement plate 53 and the U disk 510 have no protruding parts. The U disk 510 is placed in the placement plate 53 as a whole to avoid physical impact or accidental pulling due to the protrusion of the U disk 510, thereby avoiding damage to the U disk 510 or data damage. By using the placement plate 53 to protect the U disk 510 and having no exposed parts during the video tampering detection process, the U disk 510 can be prevented from being accidentally unplugged during the detection process, thereby avoiding data loss and inaccurate results of video tampering detection.

[0048] The inner wall of the placement plate 53 is provided with a square groove 59, and a reciprocating screw rod 54 is rotatably connected to the inside of the placement plate 53. A symmetrical threaded groove is provided on the surface of the reciprocating screw rod 54, and two clamping plates 55 are respectively threadedly connected to the two threaded grooves. In this way, the rotation of the reciprocating screw rod 54 can simultaneously drive the two clamping plates 55 to approach or move away from each other for clamping and loosening. The outer surface of the reciprocating screw rod 54 is symmetrically threaded with the clamping plates 55, and the outer surface of the placement plate 53 is rotatably connected to a gear 57. A belt 56 is transmission-connected between the outer surface of the reciprocating screw rod 54 and the outer surface of the gear 57. A rack 58 is meshingly connected to the bottom of the gear 57, and a U disk 510 is movably connected to the inner wall of the placement plate 53. The end of the rack 58 away from the placement plate 53 is fixedly connected to the inner wall of the mounting groove 3. Through the coordinated use of the reciprocating screw rod 54, the gear 57, the rack 58 and the clamping plate 55, the placement plate 53 can drive the U disk 510 to be plugged in and out. The U disk 510 is clamped and fixed during the process, and the clamping process of the U disk 510 by the two clamping plates 55 can automatically position it to a position parallel to the interface 4, so that the U disk 510 can be accurately inserted into the interface 4, and the position of the U disk 510 can be accurately controlled to ensure that the U disk 510 is always in the correct position during the detection process, thereby improving the accuracy of the detection. The clamping design can effectively prevent the U disk 510 from loosening or falling off due to vibration or external force during the plugging and unplugging process, thereby ensuring a stable connection. Through the arrangement of the gear 57 and the belt 56, the rotation of the gear 57 indirectly drives the reciprocating screw rod 54 to rotate, and it can be achieved in a limited space that when the U disk 510 is completely pulled out of the interface 4, the gear 57 and the rack 58 are engaged so that the clamping plate 55 does not clamp it, and the U disk 510 is positioned and clamped before it is inserted into the interface 4, ensuring that the U disk 510 is accurately positioned before insertion and that the U disk 510 is driven to be pulled out when the placement plate 53 moves outward.

[0049] The reciprocating screw rod 54 is located inside the square groove 59, and the two clamping plates 55 slide symmetrically inside the square groove 59. Rubber pads are provided on the sides of the two clamping plates 55 that are close to each other. The rubber pads have a certain elasticity and can play a buffering role during the plugging and unplugging process, reduce the impact force on the U disk 510 and the clamping plates 55, and prevent damage due to excessive force. The rubber material is not easy to generate static electricity, which can reduce the interference and data loss caused by static electricity during the plugging and unplugging of the U disk 510. The rubber pads can increase the friction between the clamping plates 55 and the U disk 510, making the clamping more stable and not easy to slip. The rubber pads can adapt to the uneven surface of the U disk 510, so that the U disk 510 can be well clamped.

[0050] The protective component 6 includes a movable plate 61, the upper surface of the movable plate 61 is fixedly connected to the bottom of the placement plate 53, the outer surface of the movable plate 61 is symmetrically provided with irregular slide grooves 62, the inner part of the irregular slide grooves 62 is symmetrically slidably connected with cylindrical slide rods 63, the bottoms of the two cylindrical slide rods 63 are fixedly connected with square slide bars 64, the inner wall of the installation groove 3 is fixedly connected with a fixed column 65, and the ends of the two square slide bars 64 away from the interface 4 are fixedly connected with a closing plate 66, the irregular slide groove 62 is composed of a vertical section and an inclined section, and the two square slide bars 64 slide on the outer surface of the fixed column 65. Through the coordinated use of the protective component 6, the closing plate 66 is moved to insert the installation groove into the interface 4 in the process of the placement plate 53 driving the USB flash drive 510. 3 is closed, and the closing plate 66 moves to open the opening of the mounting slot 3 during the process of the placement plate 53 driving the U disk 510 to pull out the interface 4. When detecting, closing the opening of the mounting slot 3 can prevent external interference and ensure the safety of the detection process. The automatic closing design can prevent dust, foreign matter, etc. from entering the U disk 510 and protect the U disk 510 from damage. Closing the opening of the mounting slot 3 can reduce the interference of external factors on the detection results and improve the accuracy of the detection. Through the design of the vertical section and the inclined section of the irregular slide groove 62, the placement plate 53 can be completely opened by the closing plate 66 before moving out of the opening of the mounting slot 3, which can avoid the collision between the placement plate 53 and the closing plate 66 during the removal or insertion process, thereby reducing the risk of damage.

[0051] The following is the entire working process and working principle of the above embodiment:

[0052] In the initial state, the USB flash drive 510 is not located in the interface 4 , the two closing plates 66 do not close the opening of the mounting groove 3 , the cylinder 51 is in a retracted state, and the cylindrical slide 63 is located at the bottom end of the vertical section of the irregular slide groove 62 .

[0053] First, prepare the video file to be tested and store it in the U disk 510. Before the test, the U disk 510 needs to be inserted into the interface 4. The user places the U disk 510 accurately in the placement plate 53. The user starts the cylinder 51, and the cylinder 51 extends to drive the auxiliary plate 52 to move. Since the inner wall of the installation groove 3 is provided with a parallel slide groove, the auxiliary plate 52 slides inside the parallel slide groove. When the auxiliary plate 52 moves, it drives the placement plate 53 to move into the installation groove 3, and the placement plate 53 drives the U disk 510 to be inserted into the interface 4. When the video test is completed and the U disk 510 needs to be pulled out, it is only necessary to control the cylinder 51 to contract. The cylinder 51 drives the auxiliary plate 52 to move out of the installation groove 3, the auxiliary plate 52 drives the placement plate 53 to move out of the installation groove 3, and the placement plate 53 drives the U disk 510 to leave the interface 4. Through the cooperation of the cylinder 51, the auxiliary plate 52 and the placement plate 53 By using it, automatic insertion and removal of the U disk 510 can be achieved. The automated operation reduces the errors caused by human operation and improves the accuracy of detection. The user does not need to manually plug and unplug, but only needs to put the U disk 510 into the placement plate 53 to automatically complete the plugging and unplugging. The operation is simple and convenient. The placement plate 53 is driven to enter the video tampering detection device 1 through the movement of the auxiliary plate 52, so that there are no protruding parts of the placement plate 53 and the U disk 510. The U disk 510 is placed in the placement plate 53 as a whole to avoid physical impact or accidental pulling due to the protrusion of the U disk 510, thereby avoiding damage to the U disk 510 or data damage. By using the placement plate 53 to protect the U disk 510 and having no exposed parts during the video tampering detection process, the U disk 510 can be prevented from being accidentally unplugged during the detection process, thereby avoiding data loss and inaccurate results of video tampering detection.

[0054] When the placement plate 53 moves into the installation slot 3, it drives the gear 57 to move. When the gear 57 moves, it meshes with the rack 58. The gear 57 rolls on the top of the rack 58. The rotation of the gear 57 drives the reciprocating screw rod 54 to rotate through the transmission of the belt 56. The rotation of the reciprocating screw rod 54 drives the two clamping plates 55 to approach each other. The two clamping plates 55 clamp and fix the U disk 510. At this time, the U disk 510 has not been inserted into the interface 4. The clamping process of the two clamping plates 55 on the U disk 510 can automatically position it to a position parallel to the interface 4, so that the U disk 510 can be accurately inserted into the interface 4, and the position of the U disk 510 can be accurately controlled to ensure that the U disk 510 is always in the correct position during the detection process, thereby improving the accuracy of the detection. The clamping design can effectively prevent the U disk 510 from loosening or falling off due to vibration or external force during the plug-in and unplug process, ensuring the connection. The connection is stable. When the video detection is completed, the placement plate 53 moves out of the installation slot 3. At this time, the clamping plate 55 clamps the U disk 510 all the time. When the U disk 510 is completely pulled out of the interface 4, the gear 57 is meshed with the rack 58 and rolls on the rack 58. The gear 57 drives the reciprocating screw rod 54 to rotate through the transmission of the belt 56. The rotation of the reciprocating screw rod 54 drives the two clamping plates 55 to move away from each other to relax the U disk 510. Through the setting of the gear 57 and the belt 56, the rotation of the gear 57 indirectly drives the reciprocating screw rod 54 to rotate. It can be achieved in a limited space that when the U disk 510 is completely pulled out of the interface 4, the gear 57 is meshed with the rack 58 so that the clamping plate 55 does not clamp it. Before the U disk 510 is inserted into the interface 4, it is positioned and clamped, ensuring that the U disk 510 is accurately positioned before insertion and the placement plate 53 drives the U disk 510 to be pulled out when it moves outward.

[0055] When the placement plate 53 moves into the installation groove 3, it also drives the moving plate 61 to move into the installation groove 3. At this time, the cylindrical slide 63 moves in the vertical section of the irregular slide groove 62. When the placement plate 53 and the moving plate 61 all enter the installation groove 3, the moving plate 61 drives the cylindrical slide 63 to slide in the inclined section of the irregular slide groove 62. The inclined shape of the irregular slide groove 62 makes the cylindrical slide 63 drive the square slide 64 to slide on the outer surface of the fixed column 65. The two square slides 64 move close to each other, and the two square slides 64 drive the closing plate 66 to install The opening of the mounting groove 3 is closed to prevent external interference. After the video detection is completed, the placement plate 53 moves out of the mounting groove 3 to drive the moving plate 61 to move. The moving plate 61 moves to make the cylindrical slide 63 slide in the irregular slide groove 62. The irregular slide groove 62 makes the cylindrical slide 63 drive the square slide bar 64 to move away from each other. The square slide bar 64 drives the closing plate 66 to open the opening of the mounting groove 3. Through the coordinated use of the protective component 6, the closing plate 66 moves to open the opening of the mounting groove 3 during the process of the placement plate 53 driving the U disk 510 to be inserted into the interface 4. The opening is closed, and the closing plate 66 moves to open the opening of the mounting slot 3 during the process of the placement plate 53 driving the U disk 510 to pull out the interface 4. This linkage design does not require additional transmission structure and drive structure, but controls the closing and opening of the opening by the movement of the placement plate 53, which can save space and make the entire device more compact and simple. The user only needs to control the movement of the placement plate 53 without separately controlling the opening and closing of the closing plate 66. This simplified operation method can improve the convenience and efficiency of use. When detecting, closing the opening of the mounting slot 3 can prevent external interference and ensure the safety of the detection process. The automatic closing design can prevent dust, foreign matter, etc. from entering the U disk 510 and protect the U disk 510 from damage. Closing the opening of the mounting slot 3 can reduce the interference of external factors on the detection results and improve the accuracy of the detection. Through the design of the vertical section and the inclined section of the irregular slide groove 62, the placement plate 53 can be completely opened by the closing plate 66 before moving out of the opening of the mounting slot 3, which can avoid the collision between the placement plate 53 and the closing plate 66 during the removal or insertion process, reducing the risk of damage.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A video tampering detection method based on signal-to-noise ratio imbalance, characterized in that: The following steps are involved: Step 1: Prepare the video file to be tested and store it in a USB flash drive. Place the USB flash drive inside the component, start the component, and insert it into the device accurately and smoothly. Step 2: Import the video file into the device via a USB drive, start the detection process, and the software will automatically start analyzing the video frames; Step 3: The software extracts the video content frame by frame, performs signal-to-noise ratio analysis on each frame, calculates the signal-to-noise ratio of each frame, and records its statistical features, extracts the mean, standard deviation and distribution of the signal-to-noise ratio, uses an algorithm to analyze the features, and detects abnormal situations where the signal-to-noise ratio is unbalanced; Step 4: The video tampering detection device will mark the detected tampered area or frame and generate a detection report, including the location, type, and degree of tampering; Step 5: Manually review the detected tampering to verify the accuracy of the detection results, adjust the detection parameters according to the review results to improve the accuracy of the detection, and after completing all detection tasks, turn off the video tampering detection device and start the component to automatically unplug the USB flash drive.

2. A video tampering detection device based on signal-to-noise ratio imbalance, applied to a video tampering detection method based on signal-to-noise ratio imbalance as claimed in claim 1, characterized in that: The invention comprises a video tampering detection device (1), wherein a ventilation hole (2) is provided on the outer surface of the video tampering detection device (1), a mounting groove (3) is provided on the outer surface of the video tampering detection device (1), an interface (4) is provided on the inner wall of the mounting groove (3), a detection auxiliary component (5) for reducing errors caused by human operation is arranged inside the mounting groove (3), and a protection component (6) for improving the safety and automation level of the video tampering detection device (1) is arranged inside the mounting groove (3).

3. The video tampering detection device based on signal-to-noise ratio imbalance according to claim 2 is characterized in that: The detection auxiliary component (5) comprises a cylinder (51), the inner wall of the installation groove (3) is provided with a parallel slide groove, the outer surface of the cylinder (51) is fixedly connected to the inner wall of the parallel slide groove, the end of the cylinder (51) close to the interface (4) is fixedly connected to an auxiliary plate (52), the auxiliary plate (52) slides inside the parallel slide groove, the end of the auxiliary plate (52) away from the cylinder (51) is fixedly connected to a placement plate (53), the inner wall of the placement plate (53) is provided with a square groove (5 9), a reciprocating screw rod (54) is rotatably connected to the interior of the placement plate (53), a clamping plate (55) is symmetrically threadedly connected to the outer surface of the reciprocating screw rod (54), a gear (57) is rotatably connected to the outer surface of the placement plate (53), a belt (56) is transmission-connected between the outer surface of the reciprocating screw rod (54) and the outer surface of the gear (57), a rack (58) is meshingly connected to the bottom of the gear (57), and a USB flash drive (510) is movably connected to the inner wall of the placement plate (53).

4. The video tampering detection device based on signal-to-noise ratio imbalance according to claim 3 is characterized in that: The reciprocating screw rod (54) is located inside the square groove (59), and the two clamping plates (55) slide symmetrically inside the square groove (59). Rubber pads are provided on the sides of the two clamping plates (55) that are close to each other.

5. The video tampering detection device based on signal-to-noise ratio imbalance according to claim 3 is characterized in that: One end of the rack (58) away from the placement plate (53) is fixedly connected to the inner wall of the installation groove (3).

6. The video tampering detection device based on signal-to-noise ratio imbalance according to claim 3 is characterized in that: The protection component (6) includes a movable plate (61), the upper surface of the movable plate (61) is fixedly connected to the bottom of the placement plate (53), the outer surface of the movable plate (61) is symmetrically provided with irregular sliding grooves (62), the interior of the irregular sliding grooves (62) is symmetrically slidably connected with cylindrical sliding rods (63), the bottoms of the two cylindrical sliding rods (63) are fixedly connected with square sliding bars (64), the inner wall of the installation groove (3) is fixedly connected with a fixing column (65), and the ends of the two square sliding bars (64) away from the interface (4) are fixedly connected with a closing plate (66).

7. The video tampering detection device based on signal-to-noise ratio imbalance according to claim 6 is characterized in that: The irregular chute (62) consists of a vertical section and an inclined section.

8. The video tampering detection device based on signal-to-noise ratio imbalance according to claim 6, characterized in that: The two square slide bars (64) both slide on the outer surface of the fixed column (65).

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