KR102250873B1 - System and method for transmitting external image in security environment - Google Patents

Abstract

The present invention relates to a system and method for transmitting external image information in a secure environment. A system for transmitting external image information in a secure environment according to the present invention includes an image information collection part for acquiring external image information, and an information transmission area determination and partial image collection part for extracting a partial image to be transmitted from the external image information. It is possible to minimize the security problem regarding image information acquired from the outside and transmit the same to a main system.

Description

External image information transmission system in a security environment and its method {SYSTEM AND METHOD FOR TRANSMITTING EXTERNAL IMAGE IN SECURITY ENVIRONMENT}

The present invention relates to a system and method for transmitting external image information in a secure environment.

According to the prior art, due to concerns such as potential hacking risk and virus code implantation in an environment requiring strict security maintenance such as a CCTV monitoring site, necessary information is received by retaking a screen on which an image is displayed.

However, according to this method, there is a problem that the quality of the transmitted image is seriously deteriorated.

The present invention has been proposed in order to solve the above-described problem, and provides an external video information transmission system and method capable of minimizing security problems related to image information acquired from the outside and transmitting it to the main system in an environment requiring strict security. It has its purpose to provide.

The external image information transmission system in a security environment according to the present invention comprises an image information collection unit for obtaining external image information, and an information transmission area determination and partial image collection unit for extracting a partial image to be transmitted from the external image information. It is done.

The information transfer area determination and partial image collection unit determines an information transfer area within the screen display area of the external data transfer device, and collects a plurality of partial images corresponding to the information transfer area.

The external image information transmission system in a security environment according to the present invention uses an integrated image synthesis and transformation matrix calculator that synthesizes an integrated image using a plurality of partial images and calculates a transformation matrix for image restoration, and a transformation matrix. Accordingly, an image conversion and image quality improvement unit may be further included to generate a reconstructed image of the image and improve image quality.

The external image information transmission system in a security environment according to the present invention performs correction for a partial image through a transformation matrix calculated using coordinate information defining the information transmission area of the partial image and coordinate information about the shape of the final image. It may further include a partial image correction and processing unit to perform.

The method for transmitting external image information in a secure environment according to the present invention includes the steps of: (a) capturing an external data transmission device to obtain external image information, and (b) determining an information transmission area using the external image information, and transmitting the information. It characterized in that it comprises the step of collecting the partial image corresponding to the region.

In step (b), according to the enlargement and movement of the display area in the external data transfer device, an information transfer area represented by a preset number of coordinates is determined.

The method for transmitting external image information in a security environment according to the present invention further includes the step of (c-1) synthesizing an integrated image using a plurality of partial images, and generating and transmitting a reconstructed image according to a transformation matrix. I can.

The method for transmitting external image information in a security environment according to the present invention includes (c-2) calculating a transformation matrix using coordinate information defining an information transmission area of a partial image and coordinate information about a shape of a final image, and It may further include the step of correcting the partial image by using.

According to an embodiment of the present invention, it is applied in CCTV monitoring sites operated for public benefit, various video management systems (VMS), and other environments requiring strict security, maintaining security and delivering external image information to the main system. It has a possible effect.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 shows a method of operating a security system according to the prior art.
2 shows a system for transmitting external video information in a secure environment according to an embodiment of the present invention.
3 shows a procedure for transmitting image information according to an embodiment of the present invention.
4 illustrates an external video information transmission system in a secure environment according to an embodiment of the present invention.
5 is a diagram illustrating transmission of external data to an auxiliary system while maintaining security according to an embodiment of the present invention.
6 illustrates transfer of external data to a core security system while maintaining security according to an embodiment of the present invention.
7 illustrates collecting an externally photographed image according to an embodiment of the present invention.
8 shows an example of an original photo to be transmitted.
9 shows an example in which an original picture to be transmitted is displayed through a screen display unit of a terminal device.
10 illustrates image size adjustment or position adjustment on an external image information display screen.
11 shows a virtual display of an information delivery area in a captured image.
12 shows an information delivery area extracted from collected images together.
13 shows a result of pasting an extracted image to an information delivery area.
14 shows a result of converting the image pasted in FIG. 13 into a rectangular shape.
15 illustrates a process of transmitting an image displayed on an auxiliary system screen display unit to a core security system according to an embodiment of the present invention.
16 illustrates an external data transmission method according to an embodiment of the present invention.
17 illustrates a process of determining an information delivery area and collecting a partial image according to an embodiment of the present invention.
18 illustrates a process of automatically determining an information delivery area according to an embodiment of the present invention.
19 is an example of a shape of an image displayed when photographing through an image information collection unit according to an embodiment of the present invention and an example of expressing the same in a two-dimensional coordinate system.

The above-described and other objects, advantages, and features of the present invention, and methods of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the following embodiments are the object of the invention to those of ordinary skill in the art to which the present invention pertains. It is only provided to easily inform the composition and effect, and the scope of the present invention is defined by the description of the claims.

Meanwhile, terms used in the present specification are for explaining embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements in which the recited component, step, operation and/or element is Or does not preclude additions.

Hereinafter, in order to aid the understanding of those skilled in the art, the background to which the present invention is proposed will be first described, and then embodiments of the present invention will be described.

In CCTV monitoring sites operated for the public benefit, various incident images are provided as incidents occur.

For example, when the elderly or children living alone do not return home, a report is received at the police station or fire station, and at this time, the person in charge provides a picture of the person to be searched to the CCTV monitoring site, thereby searching/monitoring for a specific person or object.

However, in general, CCTV monitoring sites display photos stored in mobile terminals such as smartphones that have been reported on the screen and show them to the person in charge at the CCTV monitoring site. This is re-photographed with cameras or other terminal devices installed in the security environment, and the security system It registers in and follows the method of delivering it to the controllers, and the controllers perform search and monitoring using the transmitted various information.

Despite the existence of various other data transmission methods that are more convenient and faster in processing speed, the reason for applying this cumbersome method is the necessity of maintaining strict security at the CCTV monitoring site.

If the system is connected to an external network such as the Internet, a cellular network, or various remote/local wireless communication networks, the risk of potential hacking increases.

In addition, when a USB or smart phone is connected to the system by wire, there is a risk that malicious programs such as virus codes or hacking codes may be implanted.

Therefore, it has been recognized that it is safe in terms of security to receive necessary information by taking a picture of a screen on which an image is displayed again.

However, according to this method, although security can be maintained, there is a problem that the quality of the transmitted image is seriously deteriorated.

For example, due to the influence of the pixel arrangement of the screen display device that displays the image and the resolution of the camera, a Moire pattern may appear in the photographed photo or video, and the image obtained by adding reflection from the surrounding light source. The picture quality of is further deteriorated.

An issue that is considered more important in the field is the problem that the resolution of the transmitted image may be very low because it follows the method of re-taking the image displayed on the limited screen size.

As described above, since a potential risk cannot be completely excluded when an external network connection or a data transmission method using a wired or wireless communication method is used, according to the prior art, a method of separating the system as shown in FIG. 1 is used.

In FIG. 1, the core security system 11 is assumed to be a system that must strictly block external attacks.

The core security system 11 may display information by interlocking with the core security system screen display unit 12.

The auxiliary system 21 is separate from the core security system 11.

The auxiliary system 21 displays information for reference through the auxiliary system screen display unit 22.

In FIG. 1, users who use the system are security system operators using the core security system 11 and external data transmitters using the auxiliary system 21.

Security system operators can only check photos or videos provided by the external data transfer through the auxiliary system screen display unit 22, because in essence, external data is not directly linked with the core security system 11.

In this case, there is a limitation that security system operators must visually view and determine only the information displayed on the auxiliary system screen display unit 22, and thus it is difficult to adjust the size of an image to check or review a desired part in detail.

According to the prior art, when external data is copied, the auxiliary system 21 performs a malicious program inspection and various security inspections, and if it is determined that there is no problem, the auxiliary system 21 may transfer the external data to the core security system 11.

However, even in the process of transferring information from the auxiliary system 21 to the core security system 11, security reinforcement measures such as using a secure USB are required, and as a wired or wireless connection relationship between devices is formed in any way, security Vulnerability arises.

The present invention has been proposed in light of the above-described problems, and proposes a system and method for transmitting and processing external image information in a security environment.

According to the present invention, a CCTV monitoring site operated for the public benefit, that is, for security reasons, it is necessary to reliably separate it from external networks such as the Internet and cellular wireless communication networks, and to prevent potential external attacks by virus programs or hacking programs. In order to be prepared, even wired/wireless interworking through external devices such as external memory or smartphones can be applied to a strictly controlled security environment.

According to the present invention, it can be used not only in the CCTV monitoring site, but also in various environments where it is necessary to receive image information from the outside in a system requiring strict security.

According to an embodiment of the present invention, a device/terminal providing external data includes a screen display device.

According to an embodiment of the present invention, it is not necessary to additionally install a program in a device/terminal that provides external data, but a function of displaying media such as a picture on a screen must be provided.

It is preferable that the device/terminal that provides external data provides a function of adjusting the size of the image or adjusting the display area of the image, but if there is no such function, the image is displayed only with the displayed information.

2 shows a system for transmitting external video information in a secure environment according to an embodiment of the present invention.

The external image information transmission system in a security environment according to the present invention includes an image information collection unit 110 that obtains external image information, and an information transmission area determination and partial image collection unit ( 120).

The image information collection unit 110 photographs an external image information display screen using an image collection device such as a camera, and transmits the image to the information transmission region and the partial image collection unit 120.

In this case, it is preferable that the resolution of the image information collection unit 110 has a resolution equal to or higher than the reference resolution in consideration of the quality of the image to be collected.

The control unit (not shown) controls its position so that the image information collection unit 110 is robust from the influence of ambient lighting.

The support part (not shown) serves to support the image information collection unit 110 so that there is no movement or shaking in the process of performing a photographing.

The information transfer area determination and partial image collection unit 120 determines an information transfer area within the screen display area of the external data transfer device, and collects a plurality of partial images corresponding to the information transfer area.

The external image information transmission system in a security environment according to the present invention synthesizes an integrated image using a plurality of partial images, and calculates a transformation matrix for image restoration, and an integrated image synthesis and transformation matrix calculation unit 130; and An image conversion and quality improvement unit 140 for generating a reconstructed image using the matrix and performing image quality improvement may be further included.

Referring to FIG. 4, the external image information transmission system in a security environment according to the present invention uses a transformation matrix calculated using coordinate information defining an information transmission area of a partial image and coordinate information about a shape of a final image, A partial image correction and processing unit 150 for performing correction on the partial image may be further included.

3 illustrates a procedure for transmitting external image information in a secure environment according to an embodiment of the present invention.

The method for transmitting external image information in a secure environment according to the present invention includes the steps of: (a) capturing an external data transmission device to obtain external image information, and (b) determining an information transmission area using the external image information, and transmitting the information. It characterized in that it comprises the step of collecting the partial image corresponding to the region.

In step (b), according to the enlargement and movement of the display area in the external data transfer device, an information transfer area represented by a preset number of coordinates is determined.

The method for transmitting external image information in a security environment according to the present invention further includes the step of (c-1) synthesizing an integrated image using a plurality of partial images, and generating and transmitting a reconstructed image according to a transformation matrix. I can.

The method for transmitting external image information in a security environment according to the present invention includes (c-2) calculating a transformation matrix using coordinate information defining an information transmission area of a partial image and coordinate information about a shape of a final image, and It may further include the step of correcting the partial image by using.

The image information collection unit 110 acquires external image information by photographing an external image information display screen.

The information transmission region determination and partial image collection unit 120 extracts a partial image to be transmitted from the camera image, and collects a plurality of partial images.

The integrated image synthesis and transformation matrix calculation unit 130 synthesizes an integrated image using a plurality of partial images, and calculates a transformation matrix for image restoration.

The image conversion and quality improvement unit 140 generates a reconstructed copy of the image to be transmitted using the transformation matrix, but performs image quality improvement in order to process a moire pattern or a flare phenomenon caused by backlight.

The integrated image synthesis and transformation matrix calculation unit 130 according to an embodiment of the present invention determines the information transmission region and checks the correlation between a plurality of images collected through the partial image collection unit 120, and determines the relative position between the images. A single image is created by finding the relationship between the and size conversion and arranging the images according to their position.

According to an embodiment of the present invention, a matching process is performed to detect a feature point in partial images, check whether the feature points between the partial images physically mean the same point, and homography conversion through the performed matching. It finds a transformation parameter such as a matrix, and performs rotation, shifting, and size change using the transformation parameter.

The image conversion and quality improvement unit 140 according to the embodiment of the present invention performs a task of converting a single image created through the integrated image synthesis and conversion matrix calculation unit 130 into a rectangular area, and a final image quality improvement process for this To do.

The reason for performing the image quality improvement process is that there may be a moire pattern or backlight according to a process of re-acquiring information displayed on the screen by using the image information collecting device 110 such as a camera.

Since the image extracted by the determination of the information transmission area and the partial image collection unit 120 according to an embodiment of the present invention is distorted, it is necessary to correct it.

Therefore, referring to FIG. 4, the partial image correction and processing unit 150 performs correction and processing using {A, B, C, D} information describing a planned information delivery area to correct distorted images. Carry out.

The transformation matrix is calculated using the {A, B, C, D} coordinate information and the four coordinates for the shape of the final image to be transformed, and a partial image in the form of an undistorted rectangle is obtained using the transform matrix.

Even when four coordinates for the shape of the final image to be transformed are not determined, it is possible to estimate the ratio of the horizontal and vertical lengths of a terminal such as a smartphone and use it as a default value.

In this case, the ratio of the horizontal and vertical length of the corrected image may be different from the original ratio, which can be processed using an image processing tool.

Since the partial image correction and processing unit 150 may include a moire pattern or a flare phenomenon caused by backlight, the partial image correction and processing unit 150 removes such information and performs a process of improving image quality.

FIG. 5 is a diagram illustrating transmission of external data to an auxiliary system while maintaining security according to an embodiment of the present invention, and FIG. 6 is a core security system for external data while maintaining security according to an embodiment of the present invention. Shows what to convey.

The external image information transmission system 100 according to an embodiment of the present invention transfers external data to the auxiliary system 21 in a state of maintaining security, as shown in FIG. 5, and as shown in FIG. 6, It is possible to transfer external data to the core security system 11 in a secure state.

7 illustrates collecting an externally photographed image according to an embodiment of the present invention.

7 shows a process of transmitting an image captured from the outside to an external image information transmission system by an external data transmitter.

When a terminal device (D) such as a smartphone is turned on on a flat surface such as a table, a picture to be transmitted is displayed on the screen and manipulated, the image information collection unit 110 of the external image information transmission system collects image information about it. Acquire.

It is preferable that the image information collection unit 110 and the external data transmission device D shown in FIG. 7 do not move as much as possible in the process of transmitting the image, and the range in which the movement is allowed is also a translation movement on a flat surface. Or rotational movement.

8 shows an example of an original photo to be transmitted.

FIG. 8 shows an original photo to be transmitted when an external data transmitter wants to transmit a photo contained in a terminal device such as a smart phone to the auxiliary system 21 or the core security system 11.

9 shows an example in which an original picture to be transmitted is displayed through a screen display unit of the terminal device D.

As described above, in a security environment, the external data transfer person displays a picture on a smartphone (external data transfer device, D) and displays it to the security system operator, or re-photographs it, as shown in FIG. 9. ) Or to the core security system 11, and at this time, find the area you want to highlight, adjust the size, and show it.

FIG. 10 shows image size adjustment or position adjustment on an external image information display screen, through which it is possible to deliver an image of higher quality than that of simple photographing.

FIG. 10 is an example of a multi-shot of 9 images, but the number of images targeted for multi-shot is not limited thereto.

As shown in Fig. 10, when the screen of a certain area is enlarged and displayed, only a part of the original image is displayed on the screen. According to an embodiment of the present invention, a final image of high resolution is generated by acquiring a plurality of enlarged partial areas. By doing so, there is an effect that it is possible to deliver more detailed information when compared to the conventional technology for photographing a small image.

According to an embodiment of the present invention, an image in which a part of the image is expressed by screen enlargement is defined as a partial image.

11 shows a virtual display of an information delivery area in a captured image.

FIG. 11 is a virtual display of an area to which actual information is transmitted in the process of acquiring the images of FIG. 10.

As shown in FIG. 11, the information transfer area is represented by a rectangle represented by four points {A, B, C, D}.

The reason why four points are needed is that a typical screen display device has a rectangular shape.

When the screen display device D is photographed by the image information collecting unit 110, the information transmission area becomes a random square shape according to the relative arrangement state of the subject and the camera.

That is, the image acquired by the image information collection unit 110 can be expressed as information expressed in the 2D image coordinate system, and {A, B, C, D} points are each x, y coordinate in the 2D image coordinate system. It is expressed as a dot.

It is preferable that the information transfer area is usually inside the screen display area of the terminal to which the information is to be transferred, because the original picture to be transferred is displayed only in the screen display area.

However, since it is possible to display an image using only a part of the screen display area, the entire screen display area does not necessarily become an information transmission area.

According to an embodiment of the present invention, a user interface is provided for determining an information delivery area, or an information delivery area is automatically determined.

12 is a diagram illustrating an information delivery region extracted from images collected according to the process illustrated in FIG. 10.

When an information delivery region is determined according to an embodiment of the present invention, an image within the region is extracted, and when a plurality of images are displayed together, as shown in FIG. 12.

Since the plurality of images are slightly different in size and direction, the overall appearance is discontinuous, and when the ambient light source is changed or the collection parameter of the image information collection unit 110 is changed, the color is slightly different between the plurality of images. do.

13 shows a result of pasting an extracted image to an information delivery area.

FIG. 13 shows a result of an ideal image obtained through a process of extracting a partial image corresponding to a determined information delivery area from the collected image as shown in FIG. 12 and attaching the extracted result to one.

14 shows the result of converting the image pasted in FIG. 13 into a rectangular shape, and transformed the image pasted in FIG. 13 into a rectangular shape using a transformation parameter such as a homography matrix calculated by a preset method. One result is shown.

Through the above-described process, image information on external data provided by an external data transmitter is transmitted to a security system or a core security system.

According to another embodiment of the present invention, as shown in FIG. 15, the image displayed on the auxiliary system screen display unit is transmitted to the core security system while maintaining security.

15 illustrates an external data transmission method according to another embodiment of the present invention.

As shown in FIG. 16, in order to acquire an image of external data and transmit it to the core security system 11, the image information collection unit 110 provides the external data displayed through the auxiliary system screen display unit 22. Acquire the video.

17 illustrates a process of determining an information delivery area and collecting a partial image according to an embodiment of the present invention.

According to an embodiment of the present invention, it is checked whether or not to automatically determine an information transfer area (S1701).

If it is confirmed that the information delivery area is automatically determined in step S1701, the automatic determination of the information delivery area is performed (S1702), and if it is confirmed that the information delivery area is not automatically determined in step S1701, a user interface is provided. An information delivery area is determined according to an input command (S1703).

Step S1703 provides a function of displaying the captured image on a monitor or the like, and determining {A, B, C, D} position coordinates defining an information transmission area through a screen touch interface or a mouse interface.

Subsequently, in step S1704, it is checked whether or not to automatically collect partial images.

If it is confirmed in step S1704 that the partial image is automatically collected, step S1705 automatically collects the partial image in which the information transmission area is determined.

If it is confirmed that the partial image is not automatically collected in step S1704, in step S1706, in relation to the collection of the partial image in which the information delivery area is determined, a user interface is provided to collect the partial image according to an input command. In this case, partial images of the information delivery area are collected according to a preset method such as a button such as'start shooting' or a specific keyboard command.

According to an embodiment of the present invention, in the case of automatic determination of an information delivery area and automatic collection of partial images, since the information delivery area determination and partial image collection are possible without necessarily providing a user interface device such as a monitor or keyboard, the procedure Is simplified and ease of use is improved.

18 is a diagram illustrating a process of automatically determining an information transmission area according to an embodiment of the present invention, and FIG. 19 is a form of an image displayed when photographing through an image information collection unit according to an embodiment of the present invention and a two-dimensional coordinate system thereof. This is an example expressed as.

The dotted line area means a virtual image to be transmitted, and the thick solid line area means an area in which image information is actually displayed in an external information delivery device such as a smartphone terminal.

For convenience, the virtual image to be transmitted is displayed in four areas, {1, 2, 3, 4}, and in reality, the number of areas can be adjusted, and the shape is not limited to a grid type.

As shown in (a) of FIG. 18, if the image is not separately enlarged by the external information delivery device, all four virtual areas marked with {1,2,3,4} are displayed on the screen of the external information delivery device. do.

When an image is enlarged and the display area is moved through an external information delivery device, different areas are displayed on the corresponding screen as shown in (b), (c), (d), and (e) of FIG. 18.

FIG. 19 shows an image of the image shown in FIG. 18 as captured through the image information collection unit 110.

The dotted line area refers to a virtual image to be transmitted, and the thick solid line area refers to an area to which image information is actually transmitted from an external information delivery device.

According to the position of the external information transmission device including the screen on which the image is displayed and the position of the image information collection unit, the image that is actually expressed in a rectangle is obtained in a distorted shape through the image information collection unit.

According to an embodiment of the present invention, automatic estimation is performed on an information transfer area, which is an inner area that is indicated by a thick solid line shown in FIG. 19 and connects four coordinate points {A, B, C, D}.

As a method of estimating {A, B, C, D} points, the image information collection unit 110 continuously performs images only when the user performs an operation to enlarge or move the images on the screen on which the image is displayed. Is taken, the background and the foreground are separated from the captured images, and the square polygon object is extracted from the foreground part using an image processing technique, thereby estimating the coordinate values of the {A, B, C, D} points.

If the relative arrangement of the screen on which the image is displayed and the image information collection unit 110 is not changed through the external information delivery device, (a), (b), (c), (d), (e) shown in FIG. 19 The positions of each {A, B, C, D} point marked in will not change even if the shooting continues, and if the relative arrangement is changed, the positions of these points will also change over time.

It is preferable that the positions of the {A, B, C, D} points do not change during the shooting process, but even if they are changed, the image information collection unit 110 is in a fixed state, and the external information transmission device performs translational movement on a flat surface. If only (translation movement) or rotational movement (rotational movement) is performed, parameter estimation and image synthesis and conversion using the parameters are easily performed.

In the process of collecting partial images, as described above, the user interface is provided to determine an information transmission area according to an input command, or images are continuously collected by the image information collection unit 110 and the information transmission area is automatically determined. Depending on the result, when the information delivery area information is available, the partial image can be automatically collected by separately extracting the image of the corresponding location.

According to an embodiment of the present invention, in order to separately collect only images having a quality equal to or higher than a preset reference, image motion information inside the information delivery area is calculated, and partial images are collected only when the motion is less than a preset threshold. It is desirable to do it.

In addition, it is preferable to collect a partial image only when it is clearer than a threshold value by calculating the image sharpness coefficient or entropy inside the information transfer area.

At this time, various methods such as calculating Laplacian's variance are applied.

Meanwhile, the method for transmitting external image information in a secure environment according to an embodiment of the present invention may be implemented in a computer system or recorded on a recording medium. The computer system may include at least one processor, memory, user input device, data communication bus, user output device, and storage. Each of the above-described components performs data communication through a data communication bus.

The computer system may further include a network interface coupled to the network. The processor may be a central processing unit (CPU) or a semiconductor device that processes instructions stored in a memory and/or storage.

The memory and storage may include various types of volatile or nonvolatile storage media. For example, the memory may include ROM and RAM.

Accordingly, a method of transmitting external image information in a secure environment according to an embodiment of the present invention may be implemented in a computer-executable method. When a method for transmitting external image information in a secure environment according to an embodiment of the present invention is performed in a computer device, commands readable by a computer may perform the method for transmitting external image information in a secure environment according to the present invention.

Meanwhile, the method for transmitting external image information in a secure environment according to the present invention may be implemented as a computer-readable code on a computer-readable recording medium. The computer-readable recording medium includes all types of recording media in which data that can be decoded by a computer system is stored. For example, there may be read only memory (ROM), random access memory (RAM), magnetic tape, magnetic disk, flash memory, optical data storage device, and the like. In addition, the computer-readable recording medium can be distributed in a computer system connected through a computer communication network, and stored and executed as codes that can be read in a distributed manner.

So far, we have looked at the center of the embodiments of the present invention. Those of ordinary skill in the art to which the present invention pertains will be able to understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the above description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (8)

An image information collection unit that acquires a plurality of external image information including a partial image in which a part of the image is displayed by the enlarged screen of the screen display device;
An information transmission region determination and partial image collection unit for extracting a partial image to be transmitted from the external image information;
An integrated image synthesis and transformation matrix calculation unit that calculates a transformation matrix for image restoration and synthesizes an integrated image using a plurality of the partial images to be transmitted; And
An image conversion and image quality improvement unit for generating a reconstructed image using the transformation matrix and performing image quality improvement,
The image synthesis and transformation matrix calculation unit detects feature points in the plurality of transfer target partial images, performs matching on whether or not the feature points detected in the plurality of transfer target partial images are physically identical, and checks correlation, and a matching result Acquiring relative rotation, positional movement, and size conversion relationship according to, and synthesizing the integrated image by aligning the plurality of partial images to be transmitted
External video information transmission system in a secure environment.
delete delete The method of claim 1,
A partial image correction and processing unit that calculates a transformation matrix using coordinate information defining the information transmission area of the partial image and coordinate information about the shape of the final image, and performs correction on the partial image using the transformation matrix
External video information transmission system in a security environment further comprising a.
(a) acquiring a plurality of external image information including a partial image in which a part of the image is displayed by an enlarged screen of the screen display device;
(b) extracting a transmission target partial image from the external image information; And
(c) calculating a transformation matrix for image restoration and synthesizing an integrated image using the plurality of sub-images to be transmitted,
In the step (c), a feature point is detected in the plurality of sub-images to be transmitted, and the correlation is checked by matching whether the feature points detected in the plurality of sub-images to be transmitted are physically identical, and Acquiring relative rotation, position movement, and size conversion relationships, and synthesizing the integrated image by aligning the plurality of transmission target partial images
External video information transmission method in a secure environment. delete delete delete

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