WO2019139539A1

WO2019139539A1 - Data transmission system and method

Info

Publication number: WO2019139539A1
Application number: PCT/SG2019/050017
Authority: WO
Inventors: 高立瀚; 邱秀金
Original assignee: 新加坡能源创新发展有限公司
Priority date: 2018-01-12
Filing date: 2019-01-11
Publication date: 2019-07-18
Also published as: CN209881936U; CN110049279A; SG11202006616WA

Abstract

A data transmission system comprises a first display device that is disposed at a first end and used for displaying original images generated by original data; a first image capturing device for capturing the original images to generate a first image copy; an image transmitting device connected with the first image capturing device in an electric signal communication manner to transfer the first image copy to a second end; an image receiving device disposed at the second end to receive the first image copy; and an image processing device connected with the image receiving device in an electric signal communication manner to extract the original data from the first image copy so as to complete data transmission.

Description

Data transmission system and method

The present invention relates to a data transmission system and method, and more particularly to a system for securely transmitting data and a method for securely transmitting data.

The System of Supervisory Control and Data Acquisition (SCADA) system is a computer-based automation system. SCADA system can be applied to data acquisition, data transmission, analysis and application in power, metallurgy, petroleum, chemical, gas, railway and many other fields to achieve facility equipment monitoring and process control.

Because SCADA systems can be applied to critical infrastructure such as energy supply, involving national security and public interest, where data needs to be transmitted over the air or over the Internet, especially if the data comes from a remote SCADA system or uses remote operating equipment to remote SCADA systems. In the case of monitoring, the security of the data transmission of the system is very important.

Embodiments of the present invention provide data transmission systems and methods that facilitate increased data transmission security. A data transmission system according to an embodiment of the present invention includes a first display device disposed at a first end to display an original image generated from original data, and a first imaging device configured to capture an original image displayed by the first display device, Generating a first image copy; an image transmitting device communicably coupled to the first camera device to transmit the first image copy to a second end; and an image receiving device disposed at the second end to receive the first image copy And an image processing device communicably coupled to the image receiving device to extract the raw data from the image copy.

Preferably, the image processing device includes a second display device communicably coupled to the image receiving device for displaying the first image copy; and a second imaging device for capturing the first display of the second display device And copying the image to generate a second image copy; the image conversion device disposed at the second end is communicably coupled to the second camera to extract the original data from the second image copy.

Preferably, the first photographing device is spaced apart from the first display device, and the second photographing device is spaced apart from the second display device.

Preferably, the first photographing device and the second photographing device each comprise an undistorted lens such that the first image copy and the second image copy are non-linearly deformed compared to the original image.

According to an embodiment, the first end is a first closed network and the second end is a second closed network that is isolated from the first closed network.

Preferably, the first closed network is in a first geographic location and the second closed network is in a second geographic location that is isolated from the first geographic location.

Preferably, the data transmission system further includes image generating means communicatively coupled to the first display means to generate an original image based on the raw data and to transmit the original image to the first display means.

Preferably, the data transmission system further includes a data collection device disposed at the first end, the data collection device being communicatively coupled to the image generation device to transmit the collected raw data to the image generation device.

Advantageously, said data transmission system further comprises an image controller coupled to said first display device, said image controller being arranged to display the same original image on said first display device at least 2 times, wherein The original image displayed for the first time is in a first position on the first display device, and the original image displayed in the second time is in a second position on the first display device offset from the first position.

Preferably, the image controller is configured to set coordinate parameters corresponding to at least two display positions and offset between the display positions for the same original image to be displayed at respective positions of the first display device One original image.

Alternatively, the image controller is configured to generate a plurality of copies of the display for the same original image, each copy of the display being set with a coordinate parameter that is offset relative to the position of the other display copy to determine its display position, A display copy of the original image is displayed for each of the respective locations determined on the first display device in accordance with respective coordinate parameters.

A data transmission method according to an embodiment of the present invention includes displaying an original image generated from original data at a first end; capturing the displayed original image to generate a first image copy; transmitting a first image copy to the second end; and at the second The end extracts the raw data from the first image copy.

Preferably, the data transmission method further comprises converting the original data to the original image at the first end before displaying the original image generated by the original data on the first end.

Preferably, the data transmission method further comprises: collecting the original data at the first end before converting the original data to the original image at the first end.

Preferably, the data transmission method further comprises encrypting the first image copy before transmitting the first image copy.

Preferably, in the data transmission method, extracting the original data from the first image copy at the second end comprises receiving and displaying the first image copy; capturing the first image copy to generate a second image copy; Converting the second image copy to the original data.

Preferably, in the data transmission method, displaying the original image generated by the original data at the first end comprises displaying the same original image at least 2 times on the first end, wherein the original image displayed for the first time is in the first position, The secondary image displayed twice is in a second position offset relative to the first position.

Preferably, the data transmission method further includes: setting, for the same original image, coordinate parameters corresponding to at least two display positions, each of which is offset from each other, to sequentially display the originals in the at least two display positions. image.

Preferably, the data transmission method further comprises: generating a plurality of copies of the display of the same original image, each copy of the display being set with a coordinate parameter that is offset from the position of the other display copy to determine its display position, in accordance with A corresponding copy of the original image is displayed for each location determined by the respective coordinate parameters.

According to an embodiment, in the data transmission method, the first end is a first closed network, and the second end is a second closed network that is isolated from the first closed network.

Preferably, in the data transmission method, the first closed network is in a first geographical location, and the second closed network is in a second geographical location that is isolated from the first geographical location.

The other aspects, the corresponding technical solutions, the advantages and the advantages of the present invention will be apparent from the following detailed description.

Embodiments of the present invention are disclosed below with reference to the accompanying drawings, in which:

figure 1

1 is a block diagram showing the structure of a data transmission system in accordance with one embodiment of the present invention.

figure 2

2 is a schematic flow chart of the data transmission system shown in FIG. 1 for data transmission.

image 3

FIG. 3 is a schematic structural diagram of a data transmission system according to another embodiment of the present invention.

Figure 4A

It is a schematic structural diagram of a photographing apparatus of a data transmission system according to an embodiment of the present invention.

Figure 4B

4B is a schematic diagram showing an original image display state according to an embodiment of the present invention.

Figure 4C

4C is a schematic diagram of an image copy generated by the original image capture shown in FIG. 4B, in accordance with an embodiment of the present invention.

Figure 5

Figure 5 is a schematic illustration of a nonlinearly deformed or distorted image generated using conventional camera photography.

Figure 6A

Figure 6A is a schematic illustration of multiple displays of an image in accordance with an embodiment of the present invention.

Figure 6B

6B is a schematic diagram of the image shown in FIG. 6A being captured to generate an initial copy of the image and compensated/corrected to obtain an image collated copy.

Figure 7A

FIG. 7A is a schematic diagram of a data transmission method according to an embodiment of the present invention.

Figure 7B

FIG. 7B is a schematic diagram of a data transmission method according to another embodiment of the present invention.

Example

As shown in FIG. 1 and FIG. 2, a data transmission system 10 according to an embodiment of the present invention includes a first display device 208 disposed at a first end 200, and a first imaging device 210 disposed at a distance from the first display device 208. An image transmitting device 214 connected to the first imaging device 210, for example, an electrical signal communication connection, an image receiving device 414 electrically coupled to the image transmitting device 214, and an image processing device 413 electrically coupled to the image receiving device 414. . The first display device 208 and the first imaging device 210 are in an electrical signal communication isolation state, and are limited to capturing an image displayed on the first display device 208 via the first imaging device 210.

The first display device 208 can be an instrument device that can display a visual image, such as an LED display, a projector, or the like. The first photographing device 210 may be a digital camera, a web camera, or the like that can capture and store visible images. The image transmitting device 214 may be a wireless signal transmitter for transmitting an image captured by the first photographing device 210 by means of, for example, video streaming. The image transmitting device 214 and the first photographing device 210 may be separate and electrically connected signals, or may be an integrated device integrated with image and/or video capturing and transmitting functions, such as a web camera or a web camera.

Preferably, the data transmission system 10 may further include a data collection device 202 disposed at the first end 200, a sensor 201 and a data processing device 204 respectively connected to the data collection device 202, and an image generation communication connection with the data processing device 204. Device 206.

Data acquisition device 202 may collect raw data 502 associated with first end 200, such as temperature data, pressure data, shock data, etc., via various sensors 201. Data processing device 204 receives and formats raw data 502 collected by data collection device 202 to obtain formatted raw data 504 and store it. The image generation device 206 receives the formatted raw data 504 and converts it into an original image 506 representing the original data 502, such as a two-dimensional code (QR code), a linear barcode, a PDF417 barcode, or a digital image in other formats, and the like. The original image 506 is displayed by the first display device 208.

Alternatively, the first display device 208 can also obtain and display the original image generated by the original data by other means, such as obtaining and displaying the original image by means of scanner input, thereby eliminating the need for the data collection device 202, the data processing device 204, and Image generating device 206.

The first end 200 and the second end 400 may be independent closed networks that are isolated from electrical signals of the external environment, such as dedicated local area networks, located at the same or respectively in different geographical locations, and the electrical signal communication is isolated, for example, independent of each other, and the external environment. And other independent facilities electrical signal communication isolated power stations, power plants, grid sub-control centers, power grid control centers and other facilities. Electrical signal communication isolated electrical signal communication isolation.

The first end 200 and the second end 400 may also be an open network in electrical communication with an external environment. The key or sensitive data between the first end 200 and the second end 400 can be transmitted through the technical solution provided by the embodiment of the present invention.

The first photographing device 210 has a photographing field of view 212. In the present embodiment, the first imaging device 210 is disposed outside the first end 200 and spaced apart from the first display device 208, for example, a distance of 0.5 to 1 meter, so that the first display device 208 is located in the shooting field 212. Thus, the first photographing device 210 can capture the original image 506 displayed by the first display device 208.

The first camera 210 captures the original image 506 displayed by the first display device 208 to generate a first image copy 508. The first image copy 508 is transmitted to the image receiving device 414 via the communication channel 300 via the image transmitting device 214.

The image processing device 413, which is in electrical signal communication with the image receiving device 414, receives the first image copy 508 transmitted by the image receiving device 414 and extracts image data from the first image copy 508 that generates the first image copy 508. Since the first image copy 508 is identical to the original image 506, the image data extracted from the first image copy 508 is the raw data that generated the original image 506, ie, the formatted raw data 504 described above.

The image processing device 413 can further include a data restoration device 404 and a user interface 402 in electrical signal communication with the data restoration device 404. Data restore device 404 converts formatted raw data 504 into raw data 502 and displays it on user interface 402, thereby completing the transfer of raw data 502 from first end 200 to second end 400.

According to a preferred embodiment, the image processing device 413 includes a second display device 410 that is in electrical signal communication with the image receiving device 414; a second camera device 408 that is disposed at the second end 400; and is in electrical signal communication with the second camera device 408. Image conversion device 406; image restoration device 404 in electrical signal communication with image conversion device 406; and user interface 402 in electrical signal communication with image restoration device 404. The first image copy 508 is transmitted to the image receiving device 414 via the communication channel 300 via the image transmitting device 214 and displayed on the second display device 410.

The second display device 410 is disposed outside the second end 400 adjacent to the edge of the second end 400. The second imaging device 408 is disposed inside the second end 400. The second imaging device 408 has a shooting field of view 412. The second imaging device 408 is spaced apart from the second display device 410, for example, by a distance of 0.5 to 1 meter, such that the second display device 408 is located within the shooting field of view 412, so that the second imaging device 408 can capture the second display device 410 for display. The first image copy 508 is to generate a second image copy 510. The second display device 410 and the second imaging device 408 are in an electrical signal communication isolation state, and are limited to capturing an image displayed on the second display device 410 via the second imaging device 408.

The second display device 410 may be an instrument device that can display a visible image such as an LED display, a projector, or the like. The second photographing device 408 may be an instrument such as a digital camera, a camera, or the like that can capture a visible image. The second image copy 510 generated by the second photographing device 408 is transmitted to the image conversion device 406 via the internal communication network of the second end 400. Image conversion device 406 is operative to convert second image copy 510 into corresponding formatted image data 504. Data restore device 404 converts the formatted image data to raw data 502, thereby completing the transfer of raw data 502 from first end 200 to second end 400. The raw data 502 can be displayed on the user interface 402 for purposes such as monitoring, data analysis, and subsequent data processing of the first end 200 at the second end 400.

In another embodiment as shown in FIG. 3, the first end 200 is located at a first geographic location, such as at country A. The second end 400 is located at another geographic location, such as at Country B. The first imaging device 210 is disposed inside the first end 200 and is isolated from other facilities electrical signals of the first end 200, and is limited to capturing an image displayed on the first display device 208 via the first imaging device 210. The image receiving device 414 is in electrical signal communication with the image transmitting device 214. The second display device 410 is disposed inside the second end 400 and is electrically isolated from the electrical signal communication connection of the image receiving device 414.

The first display device 208 is located inside the first end 200 for displaying an original image 506 generated by the raw data associated with the first end 200. The first camera 210 is located inside the first end 200 and spaced apart from the first display device 208 for capturing the original image 506 displayed by the first display device 208 to generate a first image copy 508. The first image copy 508 is transmitted to the image receiving device 414 provided at the second end 400 via the communication channel 300 and displayed on the second display device 410 in electrical signal communication with the image receiving device 414.

The second display device 410 is disposed inside the second end 400 and is isolated from other facility electrical signals of the second end 400 and is limited to capturing images displayed on the second display device 410 via the second camera 408. The second imaging device 408 is spaced apart from the second display device 410 for capturing the first image copy 508 displayed by the second display device 410 to generate a second image copy 510. The image conversion device 406, which is in electrical signal communication with the second camera 408, converts the second image copy 510 into corresponding formatted image data 504. The data restoration device 404, which is in electrical signal communication with the image conversion device 406, converts the formatted image data 504 into raw data 502, thereby completing the data transfer from the first end 200 to the second end 400. The raw data 502 can be directly displayed on the user interface 402 that is in electrical communication with the data restoration device 404 for purposes such as monitoring, data analysis, and subsequent data processing at the second end 400.

During system operation, the data collection device 202 collects raw data associated with the first end 200 via sensors 201, such as temperature data, pressure data, vibration data, and the like. The data collection device 202 collects the raw data 502 at predetermined time intervals, such as every millisecond, every second, every minute, etc., and transmits the collected raw data 502 to the data processing device 204. The data processing device 204 converts the raw data 502 into formatted raw data 504, such as a CSV document, a DOT document, an HTML document, etc., formatted raw data 504, and transmitted to the image generation device 206. The image generation device 206 images the formatted raw data 504 to generate an original image 506 representing the formatted raw data 504, such as a two-dimensional code (QR code), a linear barcode, a PDF417 barcode, or a data image in other formats. The image generation device 206 can also convert the formatted raw data 504 into a dynamic original image, such as a live video image, a dynamic waveform, a dynamic chart, and the like. The image generation device 206 can also generate the raw data 502 directly as the original image 506, thereby eliminating the need to format the raw data 502. Thereafter, the original image 506 is displayed at the same time interval via the first display device 208 electrically coupled to the image generating device 206.

The first photographing device 210 disposed at an interval from the first display device 208 captures the original image 506 displayed by the first display device 208 to generate a first image copy 508, and then via the image transmitting device 214 through, for example, the Internet, a local area network, a virtual private network ( The network communication channel 300 of the VPN, Virtual Private Network, etc. transmits the first image copy 508 to the second display device 410. The image transmitting apparatus can also generate an encrypted image using an encryption algorithm to improve the security of data transmission. The first imaging device 210 is spaced apart from the first display device 208 and is electrically isolated from communication, and is limited to capturing an image displayed on the first display device 208 via the first imaging device 210. The original image displayed is data of a read-only attribute, so that an attempt from the first end 200 to invade the first end 200, rewrite the image, or overwrite the data through the first display device 208 can be effectively prevented.

The second display device 410 receives and displays the first image copy 508. The second imaging device 408, which is spaced apart from the second display device 410, captures the first image copy 508 displayed by the second display device 410 to generate a second image copy 510. The second imaging device 408 is spaced apart from the second display device 410 and is electrically isolated from communication, and is limited to capturing an image displayed on the second display device 410 via the second imaging device 408, thereby effectively preventing externally from the second end 400. An attempt to invade the second end 400, rewrite the image, or overwrite the data by the second imaging device 408.

The image conversion device 406 extracts the formatted original data 504 from the second image copy 510 generated by the second imaging device 408, for example, by two-dimensional code decoding, linear code decoding, optical character recognition (OCR, Optical Character Recognition), and the like. The method generates a CSV document, a DOT document, an HTML document, and the like to format the original data 504. The data restoration device 404 can initialize the formatted data 504, restore it to the original data 502, and provide it to the user via the user interface 402 to effect data transfer from the first end 200 to the second end 400.

The first camera 210 is spaced from the first display device 208 such that the first display device 208 is located within the field of view 212 of the first camera device 210. Similarly, the second camera 408 is located within the field of view 412 of the second display device 410. The separation distance between the first imaging device 210 and the first display device 208 and the separation distance between the second imaging device 408 and the second display device 410 may be set such that the first imaging device 210 conveniently and accurately captures the original image 506 and generates the first An image copy 508, and a shooting distance that allows the second camera 408 to conveniently and accurately capture the first image copy 508 to generate a second image copy 510, such as 0.5 meters, 1 meter, and the like. The first imaging device 210 and the second imaging device 408 provided by the embodiments of the present invention have longer image capturing and reading than the conventional image reading device, such as a QR code reader, a barcode scanner, and the like. Taking the distance, it can be used to set a larger range of shooting positions, and the shooting distance can be adjusted according to different environmental needs.

In order to improve the image capturing quality and accuracy under the foregoing shooting distance conditions, as shown in FIG. 4A, the first photographing device 210 and the second photographing device 408 each have an undistorted lens 800, so that the first image copy generated by the shooting can be made. 508 and second image copy 510 (FIG. 4C) are non-linearly deformed compared to original image 506 (FIG. 4B) displayed on first display device 208, thereby avoiding the generation of non-linear distortion or distorted image 590 by conventional camera capture ( As shown in Figure 5), the possibility of data restoration failure or error,

As shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 6A and FIG. 6B , the data transmission system 10 provided by the embodiment of the present invention further includes an image controller 207 connected to the first display device 208 for The same original image 506 is repeatedly displayed on a display device 208, for example, the same original image 506 is repeatedly displayed 2 times or more, wherein the image 5062 displayed at the first display device 208 is displayed from the second display. The position on the top is offset from the position of the image displayed the previous time. For example, for a rectangular two-dimensional image of 1100×1100 image size units, according to the technical solution provided by the embodiment of the present invention, the same image is set to be repeatedly displayed three times on the first display device 208, with the upper left corner of the image being The position reference point, the reference point position coordinates of the three times of display are: position 611 (810, 45), position 612 (830, 60), and position 613 (750, 70).

The image controller 207 is arranged to set coordinate parameters corresponding to at least two display positions, each of which is offset from each other for the same original image, to display the original image once at each position of the first display device 208. Alternatively, image controller 207 is arranged to generate a plurality of copies of display copy 5062 from the same original image, each copy of the display being set with coordinate parameters that are offset relative to other display copy positions that determine its display position. The image controller 207 sequentially transmits a plurality of copies of the display to the first display device 208 such that a display copy 5062 of the original image 506 is sequentially displayed on the first display device 208 in accordance with respective positions determined by the respective coordinate parameters.

The same original image 506 is sequentially displayed at the position offset on the first display device 208 and the same original image 506 is generated in multiple copies of the display copy 5062 and sequentially displayed at positions offset on the first display device 208, correspondingly, A camera 210 will also obtain a plurality of first image initial copies 5082 of the same original image and compare the obtained plurality of first image initial copies 5082. In the case where a certain first image initial copy 5082 is not defective due to the original image quality, for example, when some parts of the picture are blurred due to external causes, missing pixels, etc., the entire image copy cannot be captured. In the case of proper restoration to the original data, the quality defect 5083 of the initial copy of the image will be compensated for and/or corrected by capturing and comparing the initial copy of the other or multiple images obtained from the original image at the offset position. Thus, the first image collated copy 5084 is obtained to meet the quality requirements and can be restored to the correct original data.

Additionally or alternatively, the data transmission system 10 provided by the embodiment of the present invention further includes an image controller 407 connected to the second display device 410 for continuously displaying the same first image on the second display device 410 as described above. The initial copy of the image 5082 or alternatively the initial copy 508 of the first image is generated in multiple copies to display the initial copy and displayed in sequence. Similarly, the quality defect of an initial copy of the image will be compensated for and/or corrected by capturing and comparing the initial copy of the image or images obtained from the original image at the offset location to obtain the first image. A copy of 5084, to meet quality requirements, can be restored to the correct raw data.

As shown in FIG. 7A, a data transmission method 700 according to an embodiment of the present invention includes: displaying an original image generated by original data at a first end, as shown in block 706; and capturing the displayed original image to generate a first image. An image copy, as shown in block 710; transmitting a copy of the first image to the second end, as shown in block 716, and extracting the raw data from the first image copy at the second end, thereby implementing the raw data from The transmission from the first end to the second end is shown in block 720.

Preferably, as shown in FIG. 7B, the data transmission method 700 further includes: collecting original data at the first end before displaying the original image, as shown in block 702; and converting the collected original data at the first end As an image, as shown in block 704. The displaying the original image generated by the original data at the first end as shown in the block 706 in the data transmission method 700 further includes repeatedly displaying the same image at a position offset from the first display position of the original image, as shown in the figure frame. 708 is shown. The data transmission method 700 further includes encrypting the first image copy prior to transmitting the first image copy to the second end, as shown in block 714. Preferably, extracting the raw data from the first copy of the image at the second end further comprises displaying a first image copy, as shown in block 722; taking a first image copy at the second end to generate a second image copy, As shown in block 724, and the second image copy is restored to the original data, as shown in block 726.

The present application provides a clear and complete disclosure of the present general inventive concept and technical solutions by the above description of the embodiments and the accompanying drawings. The scope of the invention should not be construed as being limited by the specific embodiments described herein. Various changes, substitutions and/or modifications of the present invention in the general concept and the corresponding embodiments of the present invention are to be understood to be within the scope of the invention as defined by the appended claims.

Claims

A data transmission system, comprising: a first display device disposed at a first end for displaying an original image generated from original data; and a first imaging device configured to capture the original image to generate a first An image transmitting device communicably coupled to the first camera device for transmitting the first image copy; and an image receiving device communicably coupled to the image transmitting device for receiving the first image An image copying device; an image processing device communicably coupled to the image receiving device for extracting the raw data from the first image copy.
A data transmission system according to claim 1, wherein said image processing means comprises: second display means communicably coupled to said image receiving means for displaying said first image copy; second shooting a device for capturing a copy of the first image displayed by the second display device to generate a second image copy; and an image conversion device disposed at the second end, communicably connected to the second camera device to Extracting the original data from the second image copy.
A data transmission system according to claim 1 or 2, wherein said first photographing means is spaced apart from said first display means, and/or said second photographing means is spaced apart from said second display means Settings.
A data transmission system according to claim 1 or 2, wherein said first photographing means comprises an undistorted lens such that the first image copy is non-linearly deformed compared to the original image, and/or said second shot The device includes an undistorted lens such that the second image copy is non-linearly deformed compared to the original image.
The data transmission system of claim 2 wherein said first end is a first closed network and said second end is a second closed network that is isolated from said first closed network.
The data transmission system of claim 5 wherein said first closed network is in a first geographic location and said second closed network is in a second geographic location that is isolated from said first geographic location.
A data transmission system according to claim 1, further comprising image generating means communicably coupled to said first display means for generating an original image based on the original data and transmitting the original image to said first display Device.
The data transmission system according to claim 7, further comprising a data collection device disposed at the first end, wherein the data collection device is communicatively coupled to the image generation device to transmit the collected raw data to the The image generating device is described.
A data transmission system according to claim 1, further comprising an image controller coupled to said first display device, said image controller being arranged to place the same original image on said first display device The display is displayed at least twice, wherein the original image displayed for the first time is in a first position on the first display device, and the original image displayed in the second time is in a second position offset from the first position on the first display device.
A data transmission system according to claim 9, wherein said image controller is arranged to set coordinate parameters corresponding to at least two display positions and offset between display positions for the same original image To display the original image once at each position of the first display device.
A data transmission system according to claim 9, wherein said image controller is arranged to generate at least two copies of the same original image, each copy being set to have a relative position to determine its display position The coordinate parameters offset from the other display copy positions are sequentially displayed as a display copy of the original image in accordance with the respective positions determined on the first display device in accordance with the respective coordinate parameters.
A data transmission method, comprising: displaying an original image generated from original data at a first end; capturing the original image to generate a first image copy; transmitting the first image copy to a second Ending; extracting the original data from the first image copy at a second end.
The data transmission method according to claim 12, further comprising converting the original data to the original image at the first end before displaying the original image generated from the original data on the first end.
The data transmission method according to claim 12, further comprising: collecting the original data at the first end before converting the original data to the original image at the first end.
The data transmission method according to claim 12, further comprising encrypting the first image copy before transmitting the first image copy.
The data transmission method according to claim 12, wherein the extracting the original data from the first image copy at the second end comprises: receiving and displaying the first image copy; capturing the first image copy to Generating a second image copy; converting the second image copy to the original data.
The data transmission method according to claim 12, wherein said displaying the original image generated from the original data at the first end comprises displaying the same original image at the first end at least 2 times, wherein the first display is original The image is in the first position and the original image displayed the second time is in a second position offset from the first position.
The data transmission method according to claim 17, further comprising setting coordinate parameters corresponding to at least two display positions and offsetting each other for the same original image to be at least two The display position displays the original image one at a time.
The data transmission method according to claim 12, further comprising generating a plurality of copies of the display of the same original image, each copy of the display being set to have a position offset relative to the other display copy The coordinate parameter displays a display copy of the original image for each of the corresponding positions determined according to the respective coordinate parameters.
The data transmission method according to claim 12, wherein said first end is a first closed network, and said second end is a second closed network that is isolated from said first closed network.
The data transmission method according to claim 20, wherein said first closed network is in a first geographic location, and said second closed network is in a second geographical location isolated from said first geographic location.
The data transmission method according to claim 12, wherein said transmitting the first image copy to the second end comprises transmitting the first image copy to a display device disposed outside the second end.
The data transmission method according to claim 12, wherein said transmitting the first image copy to the second end comprises transmitting the first image copy to a display device disposed inside the second end.
The data transmission method according to claim 17, further comprising: capturing said original image displayed at least twice at said first end to generate at least two initial copies of said first image, comparing said at least two An initial copy of the image that compensates for and/or corrects the initial copy of the first image to obtain a first image collated copy.
The data transmission method according to claim 19, further comprising: capturing the displayed plurality of display copies to generate a plurality of first image initial copies, and compensating the plurality of first image initial copies to make up And/or correcting the initial copy of the first image to obtain a first image collated copy.