CN112163246A

CN112163246A - Synchronous screen display system for information security protection

Info

Publication number: CN112163246A
Application number: CN202011003136.XA
Authority: CN
Inventors: 王鹏; 王鹍
Original assignee: Zhengzhou Shenglong Information Technology Co ltd
Current assignee: Zhengzhou Shenglong Information Technology Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-01-01
Anticipated expiration: 2040-09-22
Also published as: CN112163246B

Abstract

The invention discloses a synchronous screen display system for information security protection. The system comprises a display screen, a display controller and synchronous glasses, wherein the display screen alternately and circularly displays a first picture and a second picture on time, and the content displayed by the second picture is used as interference to the first picture; when the display screen displays the first picture, the display controller controls two lenses of the synchronous glasses to be synchronously opened, and light rays of the display screen are watched through the two lenses; when the display screen displays the second picture, the display controller controls the two lenses of the synchronous glasses to be synchronously closed, and the light of the display screen is blocked by the two lenses and is not watched. The system realizes normal watching through the synchronous glasses, obtains a scrambled picture when the shooting equipment shoots the display screen, can realize various different scrambling effects through various modes, and is suitable for various application scenes.

Description

Synchronous screen display system for information security protection

Technical Field

The invention relates to the technical field of display, in particular to a synchronous screen display system for information security protection.

Background

At present, a large-screen display screen is widely applied in some meeting rooms and monitoring rooms, but the content displayed by the display screen is not expected to be shot and recorded in some application scenes, so that a corresponding technical means is needed to solve the information safety protection function of the content displayed by the display screen, that is, when a video camera or a camera is used for shooting and recording or photographing the display screen, clear content of the display screen cannot be obtained, and meanwhile, people are ensured to normally watch the content displayed on the display screen.

Disclosure of Invention

The invention mainly solves the technical problem of providing a synchronous screen display system for information safety protection, and solves the problems that the prior art lacks information display safety protection on the display content of a display screen, prevents illegal shooting, and does not influence normal watching of people.

In order to solve the above technical problem, one technical solution adopted by the present invention is to provide a synchronous screen display system for information security protection, including: the display screen is controlled by the display controller to alternately and circularly display a first picture and a second picture in time, the content displayed by the second picture is used as interference to the first picture, and the picture displayed by the display screen is a scrambled picture mixed with the first picture and the second picture when being shot; correspondingly, when the display screen displays the first picture, the display controller controls the two lenses of the synchronous glasses to be synchronously opened, and the light of the display screen is watched through the two lenses; when the display screen displays the second picture, the display controller controls the two lenses of the synchronous glasses to be synchronously closed, and the light of the display screen is blocked by the two lenses and is not watched, so that only the display content of the first picture can be seen through the synchronous glasses.

Preferably, the display content of the second screen is obtained by performing translation, rotation and/or random combination on the display content of the first screen.

Preferably, the entire first screen is divided into a plurality of sub-screens, and the second screen display content is generated by performing translation, rotation and/or random combination processing on the sub-screens in the first screen.

Preferably, when the display screen displays the dynamic video, the image frame displayed by the second picture is the image frame of the first picture after the time delay.

Preferably, the display controller includes a display morphology analysis unit for performing a display morphology analysis on the display data to distinguish between still images and moving videos.

Preferably, the display controller performs recognition analysis on the optical characteristics of the first screen display content, then performs shape-forming display area division on the first screen display content, and then generates the second screen display content after performing translation, rotation and/or random combination processing on each shape-forming area.

Preferably, the display controller performs recognition analysis on the information features of the display content of the first picture to obtain a feature region corresponding to the sensitive information features in the first picture, and generates the display content of the corresponding display region of the second picture after scrambling the feature region.

Preferably, when the first screen display content includes a character symbol, a character symbol similar to the character symbol is generated as the display content of the second screen corresponding display area.

Preferably, the display controller further prevents the display screen from being photographed by regulating a refresh rate of the display screen.

Preferably, the synchronous glasses are provided with a temperature sensor for sensing body temperature, and when the temperature sensor does not sense the body temperature of a human body, the lenses of the synchronous glasses are controlled to be in a closed state.

The invention has the beneficial effects that: the invention discloses a synchronous screen display system for information security protection. The system comprises a display screen, a display controller and synchronous glasses, wherein the display screen alternately and circularly displays a first picture and a second picture on time, and the content displayed by the second picture is used as interference to the first picture; when the display screen displays the first picture, the display controller controls two lenses of the synchronous glasses to be synchronously opened, and light rays of the display screen are watched through the two lenses; when the display screen displays the second picture, the display controller controls the two lenses of the synchronous glasses to be synchronously closed, and the light of the display screen is blocked by the two lenses and is not watched. The system realizes normal watching through the synchronous glasses, obtains a scrambled picture when the shooting equipment shoots the display screen, can realize various different scrambling effects through various modes, and is suitable for various application scenes.

Drawings

FIG. 1 is a block diagram of an embodiment of a synchronous on-screen display system for information security protection according to the present invention;

FIG. 2 is a timing diagram of an embodiment of a synchronous OSD system for information security protection according to the invention;

FIG. 3 is a diagram illustrating a first frame display content shift in an embodiment of a synchronized screen display system for information security protection according to the present invention;

FIG. 4 is a diagram illustrating a mixed display effect of a first frame and a second frame after being shifted according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating a display effect of mixed scrambling of text font sizes in an embodiment of a synchronous OSD system for information security protection according to the invention;

FIG. 6 is a diagram illustrating the effect of blending the first picture and the rotated second picture in an embodiment of a synchronous screen display system for information security protection according to the present invention;

FIG. 7 is a diagram illustrating a first frame region segmentation in an embodiment of a synchronous OSD system for information security protection according to the invention;

FIG. 8 is a schematic diagram of an embodiment of a display screen of a synchronous OSD system for information security protection according to the invention, wherein the display screen is composed of a plurality of display units;

FIG. 9 is a block diagram of a display controller in an embodiment of a synchronized screen display system for information security protection in accordance with the present invention;

FIG. 10 is a schematic diagram of a first frame-shaped region partition in an embodiment of a synchronous OSD system for information security protection according to the invention;

FIG. 11 is a schematic diagram of a refined segmentation of the first shaped region of FIG. 10;

FIG. 12 is a diagram of an information characteristic analysis recognition scenario in an embodiment of a synchronized screen display system for information security protection according to the present invention;

FIG. 13 is a diagram illustrating sensitive information characteristic interference handling in an embodiment of a synchronized OSD system for information security protection according to the invention;

FIG. 14 is a graph illustrating a comparison between a refresh cycle of a display screen and a refresh cycle of a photographing apparatus in an embodiment of a synchronous screen display system for information security protection according to the present invention;

FIG. 15 is a diagram illustrating captured effects of display screens in an embodiment of a synchronized screen display system for information security protection according to the present invention;

FIG. 16 is a diagram illustrating synchronized glasses in an embodiment of a synchronized screen display system for information security protection according to the present invention;

FIG. 17 is a flowchart illustrating an embodiment of a method for synchronized screen display for information security protection according to the present invention.

Detailed Description

In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

FIG. 1 is a block diagram of a synchronous screen display system according to an embodiment of the present invention. In fig. 1, the system comprises: the display screen comprises a display screen 1, a display controller 2 and synchronous glasses 3, wherein the display controller controls the display screen 1 to alternately and circularly display a first picture 11 and a second picture 12 in time, the content of the second picture is used as interference to the first picture, and the display time of each frame image in the first picture 11 and each frame image in the second picture 12 is very short, so that when human eyes directly watch and shoot by the shooting equipment, the obtained watching picture is a mixed picture of the first picture 11 and the second picture 12, and the picture displayed by the whole display screen is a scrambled picture mixed with a normal picture and an interference picture. The scrambled pictures comprise incomplete pictures, and unclear and fuzzy pictures which are displayed integrally or partially, namely clear, complete and effective shot pictures and videos cannot be formed, and visual fatigue is caused by influencing the impression effect. Preferably, the display screen is a large screen comprising an array of LED displays.

It should be noted that the first picture herein is not a specific single picture, but refers to a picture sequence, including a picture sequence composed of a plurality of frame images, and therefore the first picture can be regarded as an abbreviation of the first picture sequence. Similarly, the second picture is not a specific single picture, but a picture sequence including a plurality of frame images, and thus the second picture may be referred to as an abbreviation of the second picture sequence. Therefore, the temporally alternate display of the first picture 11 and the second picture 12 in a cyclic manner here means, in practice, the alternate display of each frame image in the first picture sequence and each frame image in the second picture sequence in a cyclic manner.

Therefore, in this case, when the shooting device 4 is used, including various video recording and image shooting devices with photographing and image shooting functions, the whole shot picture of the LED display array is an abnormally displayed scrambled picture, and display effects such as defects, ghosts, screens, character confusion, mosaic, and sensitive information hiding and losing can occur, so that the shot video and image cannot be normally viewed and identified, or important sensitive information in the picture is shielded, and the whole screen or sensitive display area loses the definition requirement satisfied by normal display, thereby having the purpose of preventing shooting. Or the shot display content is distorted and cannot be recovered, so that the actual appearance is influenced, and appearance fatigue and visual impairment are caused.

Correspondingly, when the display screen displays the first picture, the two lenses of the synchronous glasses 3 are synchronously opened, and at the moment, the light of the display screen is watched through the two lenses; when the display screen displays the second picture, the two lenses of the synchronous glasses 3 are synchronously closed, and the light of the display screen is blocked by the two lenses and is not watched. So that only normal first picture display contents can be seen through the synchronization glasses 3.

Preferably, the synchronous opening and closing control of the synchronous glasses 3 is controlled by a display controller, and the display controller sends a synchronous control signal to the synchronous glasses through wireless communication signals such as infrared, wireless electromagnetic waves, bluetooth and the like, so that the synchronous glasses keep synchronous with the switching of the first picture and the second picture. The synchronization control signal may be a spread spectrum encrypted signal, thereby preventing the synchronization control signal from being disturbed to lose control of the synchronized glasses. Therefore, the synchronous glasses are controlled by the display controller to keep synchronous with the switching of the first picture and the second picture.

Further, the frame rate control of the first and second frames by the display controller may be a fixed frequency or an adjustable variable frequency, and the frequency of the opening and closing control of the synchronous glasses, which is correspondingly synchronized with the fixed frequency, may include the fixed frequency and the adjustable variable frequency. For example, the frame rates of the first and second pictures can be adjusted to different frame rates, and the adjustment may be set to a fixed value, or may be a frame rate and frequency value that dynamically adjusts and changes with time, and the change may be a continuously changing frame rate and frequency value, or a frame rate and frequency value that abruptly changes and jumps, and may be implemented by pre-programming.

Preferably, the display screen displays the first picture at a certain frame rate, for example, 40 frames per second. Similarly, the display screen displays the second picture at a certain frame rate, for example, 40 frames per second. However, the display screen does not perform simultaneous display but performs display in an alternate cycle display manner. As shown in fig. 2, in the first timing diagram Ts1, for the first picture and the second picture, both of them are displayed at a frame rate of 40 frames per second, the duration of each frame is normally 25ms in 1 second, when the two pictures are alternately displayed in a cycle, each frame corresponding to the first picture can only display 12.5ms of time TX1, and each frame corresponding to the second picture can only display 12.5ms of time TX2, so that the two pictures are alternately displayed in time, and it can be seen that the frame rates of the first picture and the second picture are the same. The frame rates of the first and second pictures may be different, and in the second timing chart Ts2, it can be seen that the frame rate of the first picture is 40 frames/sec, and the frame rate of the second picture is 20 frames/sec, which is one-half of the frame rate of the first picture.

Preferably, the frame rate for the display screen is ZF₁When the frame rates of the first and second pictures are the same, the respective corresponding frame rates are ZF₁/2, e.g. ZF₁The frame rate of the first picture and the second picture corresponds to 60 frames/second, which is 120 frames/second. The frame rates of the first picture and the second picture can be set according to needs, so that the display effects of the first picture and the second picture have differences.

Further preferably, when the frame frequencies of the first picture and the second picture are different, the duration of a single frame picture can be extended for a picture with a higher frame frequency, so that the definition of the corresponding picture can be enhanced. As shown in fig. 2, for the third timing diagram Ts3, the frame images corresponding to the first frame are spaced apart to extend the duration of the single frame image in each frame, for example, the duration of the first single frame is the duration TX1 of 12.5ms, the duration of the next adjacent single frame is the delay duration TX11, which is significantly greater than that of TX1, the duration of the third single frame is TX1, the duration of the fourth single frame is TX11, and so on, and such extended duration single frame images are spaced apart from each other, mainly by using the feature of the lower frame frequency in the second frame. Therefore, the first picture can be more obvious in presentation effect, brighter in brightness and better in definition. Similarly, for the fourth timing diagram Ts4, the frame image corresponding to the second frame is separated by an interval to extend the duration of the single frame in each frame, for example, the duration of the first single frame is the duration TX2 of 12.5ms, the duration of the next adjacent single frame is the delay duration TX21, which is significantly greater than that of TX2, the duration of the third single frame is TX2, the duration of the fourth single frame is TX21, and so on, and such single frame images with extended duration appear at intervals, mainly by using the feature of lower frame frequency in the first frame. Therefore, the second picture can be more obviously presented, the brightness is brighter, and the interference effect on the first picture can be more obvious.

Therefore, the display screen displays in the display time corresponding to the first picture, and the first picture, namely the normal picture, can be observed through the synchronous glasses 3. When the second image, i.e. the interference image, is displayed on the display screen within the corresponding display time, the interference image cannot be observed through the synchronous glasses 3, because the synchronous glasses are closed by the control signal sent to the synchronous glasses by the display controller within the display time of the second image, and the display content of the second image cannot be seen. Therefore, after the person wears the synchronization glasses 3, only the first picture, i.e., the normal picture, is seen. For the shooting device 4, because the lens is used to shoot directly against the display screen 1, the display screen 1 displays the first picture and the second picture, i.e. the scrambled pictures of the normal picture and the interference picture, which are presented as the disordered pictures as a whole, so that the normal picture can not be obtained, the effect of preventing shooting is achieved, or the shot picture has no visual value.

The above is an explanation of the system composition and the operation principle of the present invention, and the following further explains the functional relationship between the first frame and the second frame.

Preferably, in practical applications, the display content of the second screen and the display content of the first screen have a correlation, and the display content of the second screen may be generated by rearranging and combining the display content of the first screen after disordering the order.

Preferably, the display content of the first screen is represented in a matrix form, and when displaying, it may be considered that each corresponding LED lamp in the first screen display array correspondingly displays the display data corresponding to each position in the matrix. First picture HM₁The display content is as follows:

wherein h is₁l₁Representing the content displayed by the 1 st row and 1 st column pixels in the first frame display array, h₁l₂Which represents what is displayed by row 1 and column 2 pixels, and so on, for a total of M rows and N columns.

Preferably, the display content of the second screen is obtained by shifting the display content of the first screen, specifically, by applying the first screen HM₁Displaying the content to perform: the up-down cyclic shift between rows, the left-right cyclic shift between columns, and the shift of both rows and columns realize the second picture HM₂And generating display content.

For example a second picture HM generated by cyclically shifting the upper and lower lines by 1 line₂The display content is as follows:

for example, a second picture HM generated by cyclically shifting the left and right columns by 1 column₂The display content is as follows:

and a second one generated by cyclically shifting the upper and lower rows by 1 row and cyclically shifting the left and right columns by 1 column, for examplePicture HM₂The display content is as follows:

as can be seen from the above embodiments, the second screen content is formed by rearranging and combining the first screen content, and this processing is based on the overall processing effect of the display content of the whole display screen, as shown in fig. 3, for example, for the first screen RT1, which is equivalent to dividing the screen into two parts, i.e. the upper half is content 1 and the lower half is content 2, the up-down conversion of the two parts can be realized by the up-down translation transformation, and the display content of the second screen RT2, i.e. the upper half is content 2 and the lower half is content 1, is formed, and then the display content of the second screen RT2 and the content displayed by the first screen RT1 are displayed on the second screen display array and the first screen display array respectively on the same display screen, so as to form an interference mixed display of the overall display; for another example, for the first picture RT3, the left and right of the picture are divided into two parts, i.e., the left half is content 1 and the right half is content 2, and the left and right parts can be exchanged by left and right translation transformation, so as to form the display content of the second picture RT4, i.e., the left half is content 2 and the right half is content 1; in the case where, for example, the display contents of the second screen RT6 are formed by performing the up-down panning switching of the up-down two portions of the first screen RT5 and then performing the left-right panning switching of the left-right two portions, it can be seen that the combined panning in these two ways corresponds to the division of the first screen into 4 display content areas, i.e., content 1 to content 4, and then the panning switching of the display contents of these 4 areas.

Preferably, the left-right translation amount and the up-down translation amount can be flexibly selected and set as required, based on the actual interference effect, in the description of fig. 2, the left-right translation amount corresponds to one half of the number of display matrix rows of the whole display screen, and the up-down translation amount corresponds to one half of the number of display matrix rows of the whole display screen. As shown in fig. 4, the blending effect after shifting the columns left and right is the half of the number of columns of the display matrix is not selected as the amount of shift, but only for the purpose of schematically showing and illustrating the blending effect after shifting, it can be seen that a significant ghost interference effect has been generated.

Preferably, for the character symbol, a certain interference effect can be generated by the translation, and even the best interference effect which is difficult to identify can be generated. In this regard, as shown in fig. 5, the normal display text in the mixed display text content of the first row XS1 is "good learning day-to-day upward", and the interference text selected in the first row is "good learning day-to-day upward" after being translated left and right by half, it can be seen that there is a good interference effect, but the effect of the superposition of "learning" and "upper" can be distinguished. The mixed display text content of the second line XS2 is then two lines of identical "good learning heaven-top", just after a downward and rightward interlaced shift and a mixed superposition, and this disturbing effect should be said to be bad, because no hard-to-distinguish effect is produced on the text. The third row XS3 shows the result of mixing the characters "good learning day and day up" and the interfering character "you are in american and american with you's down, and no translation method is used to generate the interfering picture, but it can be seen that the third row XS3 has better interfering effect than the two rows above, because the third row correspondingly finds out the structure similar to that of the character (e.g.," good "and" you "are both left and right structures), the strokes similar (e.g.," good "and" you "are both vertical and left strokes, and right strokes with vertical hooks), and the number of strokes close to each other, for example," up "corresponds to" down "," up "corresponds to" ask "," day "corresponds to" american "," learning "corresponds to" down ", and" learning "corresponds to" down ". The display text in the fourth row XS4 is "Advice quick", the corresponding interference text is "4 oujop pvjohtv", and it can be seen that the interference effect is also better, because we find similar interference letters or numbers for each letter displayed, for example, "a" corresponds to "4", "d" corresponds to "o", and so on. Therefore, similar interference characters must be found for the display characters, so that the best interference effect can be achieved, which is more obvious than the interference effect achieved by the above translation, and belongs to the highly targeted matching interference based on the display content, which will be further described later.

The above is mainly to generate the display content of the second screen based on the panning of the display content of the first screen. Preferably, the display content of the second screen is obtained by rotating the display content of the first screen, that is, the display content of the second screen is generated by rotating the display content of the first screen, and the angle of rotation may also be set according to the interference effect. For example, such as the first frame HM₁The display content is as follows:

after 45 degrees of counterclockwise rotation, a second picture HM is generated₂The display content is as follows:

further, as shown in fig. 6, the first image YT0 is rotated counterclockwise by 10 degrees to obtain a second image, and then mixed with the first image YT0 to obtain an interference image JR 1; the first picture YT0 is rotated 20 degrees counterclockwise to obtain a second picture, and then the second picture is mixed with the first picture YT0 to obtain an interference picture JR 2; the first image YT0 is rotated 90 degrees counterclockwise to obtain a second image, and then the second image YT0 is mixed with the first image YT0 to obtain an interference image JR 9. As can be seen from the interference effect, the interference picture JR1 can also distinguish the main blade of the windmill in the first picture YT0, the interference picture JR2 has difficulty in distinguishing the main blade of the windmill in the first picture YT0, and the interference picture JR3 has not been able to distinguish the main blade of the windmill in the first picture YT0 at all. Therefore, it can be seen that the interference effect has a close relationship with the composition structure and the rotation angle of the display image, because the windmill is a circular structure in this example, the interference can be generated by mixing and overlapping the rotation image, and the interference effect can be more obvious if the colors can be presented.

Further preferably, the translation and rotation processes are actually rearrangement and combination of the first screen display contents, and these two processing methods may be used in combination, for example, translation first and rotation second. The translation and rotation processing can rearrange the display content of the first picture in a mathematical calculation mode, and the method has certain calculability, and has the advantages of high processing speed and simple implementation mode.

Preferably, the display content of the second picture is obtained by randomly combining the display content of the first picture, that is, the display content of the first picture is randomly arranged and combined, that is, the display content of the first picture is randomly scrambled, and then the scrambled display content of the first picture is randomly combined into the display content of the second picture.

Further, the above-mentioned translation, rotation, and random combination processing methods may be used in combination. In addition, the above is performed based on the whole frame of the first frame, and the whole frame of the first frame may be subjected to region division, which is not related to the frame display content, i.e. the first frame is divided into a plurality of sub-frames or sub-regions, as shown in fig. 7, in the first frame HT1, the display frame is divided into a first sub-frame HT11 and a second sub-frame HT12, and it can be seen that the first sub-frame HT11 is located in the central region of the first frame HT1 and is the main region of the display frame, and the second sub-frame HT12 is located in the peripheral region of the first sub-frame HT 11. In the process of generating the second picture, the above-mentioned translation, rotation or/and random combination processing method may be performed on these different sub-pictures in the first picture, respectively. For example, the rotation process is performed for the first sub-picture HT11 located in the center area, and the panning process is performed for the second sub-picture HT12 in the peripheral area. By the method, the first picture can be further refined, and the problems that some local areas cannot be covered or the effect is poor when the whole picture is subjected to the translation, rotation or/and random combination processing are solved.

Further, as shown in fig. 8, the sub-screens of the first screen may be further distinguished based on the structural composition of the display screen, because the large display screen XP1 is usually formed by seamlessly splicing a plurality of display units XP10 having the same shape and structure, and the display controller may perform independent display control on each display unit XP10, so that the above-mentioned processing methods of translation, rotation, random combination and the like may be performed on the first partial screen corresponding to each display unit XP10, so as to generate the second partial screen corresponding to the display unit XP10, and then the first partial screen and the second partial screen are mixed into the local mixed interference screen displayed corresponding to the display unit XP 10. The mode is favorable for improving the granularity of the interference display of the whole screen, enhancing the interference effect and solving the problem that the omission or the local poor interference effect can occur during the whole screen processing, so that the interference processing can be carried out on the local part, for example, only the display content of the position of the individual display unit needs to be subjected to the interference display.

Further, as shown in fig. 9, the internal components of the display controller 2 in fig. 1 are shown, and it can be seen that the display controller includes a CPU module, a first screen display processing module, a first screen display control module, a second screen display processing module, and a second screen display control module. The display data source is data such as images and videos to be displayed, and the first image display processing module performs adaptive processing on the display data from the display data source, so that the display data meet the specification of the LED display screen, for example, the display data source has pixels 1028 × 764, and the display specification of the LED display screen is 800 × 600, so that the resolution of the display data source needs to be reduced, and the display specification of the LED display screen is adapted. The first image display control module controls the display screen to display the display data from the first image display processing module correspondingly, and controls the display physical parameters such as the corresponding frame frequency, brightness, data rate and the like, so that the display screen can normally display the content of the first image. The second image display control module correspondingly processes the display data from the first image display processing module by the translation, rotation or/and random combination to generate corresponding second image display data, and controls the display screen to display the display data and the corresponding display physical parameters such as frame frequency, brightness and data rate, so that the display screen can display the content of the second image. The CPU module realizes the control of the modules.

Further, when the display screen displays the dynamic video, the image frame displayed by the second picture is the image frame of the first picture after the time delay. That is, when the display data source is a dynamic video, the second image display processing module processes the display data from the first image display processing module, and further includes performing a delay buffering process on the image frames, and outputting the delayed image frames as second image content to be mixed with the current frame image content of the first image, for example, the image frame currently output by the first image display processing module is ZX3, before which there have been image frames ZX2 and ZX1 output, and the second image display processing module performs a delay two-image frame process, at which time the second image display processing module outputs image frame ZX1, so that the display content of image frame ZX1 is mixed with the display content of image frame ZX3 displayed by the first image as second image display content. In this way, the second image display processing module only needs to perform delayed output, and does not need the above-mentioned various translation and rotation processing processes, so that the processing speed can be faster and more timely. Of course, the first frame may be further combined with the above translation and rotation processing, that is, the delayed frame may be further subjected to translation and rotation processing and then output as the second frame.

The above technical means is mainly protection processing performed in a signal processing layer, generation of the second picture is closely related to the first picture, and the second picture is generated after the display signal of the first picture is spatially redistributed by the display controller. In order to achieve better display security protection, the first picture may be further subjected to information level identification and analysis by combining display modes, such as static display (image-text display) and dynamic display (video display), and displayed information content, and then subjected to targeted scrambling processing on sensitive information therein.

Preferably, after receiving the display data from the first screen display processing module, the second screen display processing module in the display controller first performs display morphology analysis, i.e. distinguishes between a static image and a dynamic video, where the static image refers to the same image displayed within a certain time range, such as within several seconds or several minutes, which is often the case when the courseware content is played in the lecture seat. Dynamic video refers to playing different image frames according to a certain frame rate, so as to present continuous video motion, which is often the case when playing general video. Through the display form analysis, the second picture can be generated in a targeted manner, preferably, a static image is taken as the first picture, a plurality of different second pictures can be generated in different time periods during the presentation of the static image and are respectively mixed and played with the first picture, so that the situation that the mixed interference effect of the individual second pictures is not ideal and the second pictures are used for a long time can be reduced. Preferably, for a dynamic video, when each frame of image of the dynamic video needs to be used as a first image, a second image is correspondingly generated, which requires that a second image display processing module has a high processing speed to adapt to the requirement of quickly generating the second image, so that through the analysis of the display form, the speed for generating the second image can be adapted to the form of the first image, for example, during the display of the first image, the second image is generated, and when the display time of the second image arrives, the content of the generated second image is displayed, thereby realizing the synchronization of the two images and generating a better mixed protection effect. In addition, in the case of a dynamic video, it is necessary to specifically consider the coordination between the frame rate of the video and the refresh rate of the display screen, and the effect of preventing shooting can be achieved by reducing the refresh rate of the display screen, which will be further described later.

Furthermore, the second image display processing module can perform recognition analysis on the optical characteristics of the display content of the first image, where the optical characteristics refer to optical characteristic parameters such as color and brightness corresponding to each display pixel. For example, the first screen YT0 in FIG. 6 is a color windmill with rich colors and bright display, and the backgrounds on both sides of the windmill are single dark black with single color and dark gray. Therefore, by performing identification analysis on the optical characteristics of the display content of the first picture, the boundary contour of the windmill can be identified according to the color and brightness parameters of the pixels, so that a forming area corresponding to the windmill, namely an area formed by the peripheral contour of the windmill, is obtained, the inside of the area is the windmill picture, and the outside of the area is a background area. When the two corresponding display content areas are identified, the two corresponding display content areas can be processed respectively, for example, the windmill display area is rotated to form the display content of the windmill area corresponding to the second picture, the background display area is translated to form the display content of the background area corresponding to the second picture, the display contents of the two areas are added and synthesized to correspond to the generated second picture, and a better scrambling protection effect can be obtained when the generated second picture is mixed with the first picture.

In this regard, as further explained in conjunction with fig. 10, as shown in fig. 10, where the first frame ZC0 is a frame image of a normally displayed still frame or moving video, it can be seen that the first frame ZC0 is divided into 6 shaped display regions corresponding to AX1, AX2, AX3, AX4, AX5 and AX6, and such region division is mainly recognition division based on the aforementioned optical characteristics. After the 6 shaped regions are divided, the above-mentioned translation, rotation and random combination processing may be performed for each shaped region, so as to obtain the display contents of the shaped display regions BX1, BX2, BX3, BX4, BX5 and BX6, and then further combine them into the second picture GR 0.

Preferably, when the first picture is a still picture or each frame image in a dynamic video is generated, the display regions of different pixel sizes may be divided, for example, regions with close colors may be divided as an independent region, or a region that does not change in consecutive frames in the video may be used as a background region and a region that changes may be used as a foreground region, when the second picture, i.e., an interference picture or an interference frame image, is generated. After such division of the display area, the interference display area in the second screen, which interferes with the display area in the first screen, is generated corresponding to the same display area mainly by using elements such as color and composition in the display area. Such area division is mainly based on the difference in picture contents such as color and composition.

Preferably, the scrambling anti-shooting processing is respectively carried out on a background area and a foreground area in the video, the background area is the same as the background area in a plurality of continuous video frames, so that the same interference display content is adopted for displaying in the background area, and when the display controller carries out display control, the same background interference content is used for displaying in the plurality of continuous video frames without independently carrying out background extraction and scrambling processing on each frame of video image, so that the workload of the display controller is favorably reduced. And for the foreground area, the foreground area can be processed in a targeted manner according to the size of the variable quantity in the front and rear frame images. Preferably, if the foreground area changes slowly and gradually, the interference display content corresponding to the same foreground area is selected to perform scrambling display on the slowly changing foreground area of the continuous frames of images, and then after several frames, the interference display content corresponding to another new foreground area is selected to perform scrambling display on the slowly changing foreground area of the next continuous frames of images. Preferably, if the foreground region is changed in a continuous and obvious changing process, the corresponding interference display content of the foreground region in each image frame is determined separately, and then when the display screen displays the interference display content, the corresponding interference display content of the second image is added into each image frame of the first image.

Preferably, when the first picture is a static picture or each frame image in a dynamic video, when an interference picture or an interference frame image in the second picture is generated, a network with a learning function formed by a convolutional neural network can be used for learning and training a large number of input images so as to form an identification network with artificial intelligence characteristics, then the corresponding interference picture or interference frame image in the second picture can be automatically generated for the newly input first picture, namely the static picture and each frame image, and then the display controller respectively controls the first picture display array to display the first picture and controls the second picture display array to display the second picture.

It should be noted that the region division in fig. 10 is performed based on an image of one frame in a normally displayed still picture or moving video, and is based on a region division result obtained by performing recognition analysis on an optical feature of the image. When the image is changed, the division can be identified according to the difference of the image. Unlike the division method of the embodiment shown in fig. 7, the division method of fig. 7 is applicable to each image frame because the processing method in fig. 7 is not divided based on recognition of image features or image contents, but only physical division of a display area, but the processing speed of the example shown in fig. 7 is more advantageous and the implementation method is simple and easy.

Preferably, each of the shape-forming regions may be further subdivided into a plurality of sub-regions, as shown in fig. 11, the shape-forming display region AX1 in fig. 10 is further subdivided into sub-regions AX11, AX12, AX13, AX14, AX15, and then the sub-region AX11 is translated up and down, the sub-region AX12 is translated left and right, the sub-region AX13 is translated left and right, and the sub-regions AX14 and AX15 are both translated symmetrically about the respective symmetry axes. Thereby correspondingly generating a shaped display area BX 1. By the further sub-area division and the translation processing, the area division with smaller granularity can be realized, thereby being beneficial to more finely realizing the scrambling processing.

Further preferably, the second screen display processing module can perform recognition analysis on information features of the display content of the first screen, where the information features refer to physical information embodied by the composition displayed in the screen, and the information features recognize, for example, human bodies, human faces, animal types, article types, and the like. As shown in fig. 12, a first image XR1 in which a plurality of persons are identified, each person corresponding to a characteristic area, namely a rectangular box, and labeled person, and a plurality of bottles of articles, also corresponding to a plurality of rectangular boxes, and labeled bottle, are identified. In a further first panel XD1, a plurality of animals are identified, each of which is surrounded by a corresponding rectangular box and is labelled elethant and zebra, respectively. Moreover, the display frame and the label description can also be dynamically tracked along with video playing, on the basis, scrambling processing can be performed on the identified information features in a targeted manner, scrambling processing can be performed only on sensitive information features concerned, and other information features are not required to be processed, for example, only a face is scrambled, or scrambling processing is performed on a computer display interface, character information, an equipment interface and the like in a picture, the scrambling processing can be directly performed on a first picture, or only the sensitive information features are processed to generate corresponding interference display content in a second picture after the sensitive information features concerned are identified from the first picture, and the second picture only performs interference display on a display area of the information features, while other areas do not perform interference display any more.

It can be seen that this includes both the identification of the information feature in the first picture and the scrambling process, such as the mosaic process, the direct masking process, etc., performed on the information feature, which is a direct process on the picture information, and belongs to the information layer process. On the other hand, the display scrambling is performed through the second picture, but the display scrambling is also performed through the second picture locally, namely the scrambling is performed through the second picture in the screen display area where the sensitive information features are located, and the processing procedure belongs to the display signal level.

As schematically shown in fig. 13, when a computer display is identified in the image, only the scrambling process is required for the content displayed in the display, and the other display areas are not processed.

It is further preferred to incorporate the foregoing description of scrambling of the third and fourth rows of XS3 and 4 text symbols in FIG. 5. When the character symbol displayed is identified and analyzed by the information characteristic of the display content of the first picture, the method can specifically generate the interference content of the display area corresponding to the second picture through similar interference characters except for the translation and rotation processing method, namely, the display content of the second picture is not from the first picture but is generated specifically according to the identification of the information characteristic in the first picture. For example, the characters "good" in fig. 5 correspond to "you", the "upper" corresponds to "lower", the "to" corresponds to "question", the "day" corresponds to "beauty", the "to" hall ", and the" to "shi" in learning "correspond to" shi ". When the specific characters are identified on the first picture, the similar characters corresponding to the characters are directly called from the corresponding similar database to be used as the interference characters of the display area corresponding to the second picture.

Preferably, the display controller identifies the face in each frame of image in the still picture or in the dynamic video, and when the scrambling anti-shooting processing needs to be performed on the face region, the display controller may identify the face features, including the identification and judgment of the face type, the hair style, the skin color, and the facial features, then find the interference features corresponding to each facial feature on the basis, and then combine these interference features, so that the combination will generate significant interference on the normal face, for example, the skin color is close, that is, the skin black and white is close. The human face with higher similarity to the normal human face in the first picture can be found from the database to be used as the interference human face in the second picture, and the simulation reconstruction can be carried out on the basis of the normal human face in the first picture to realize the interference human face in the second picture. Then, the display controller controls the normal face in the first picture to be displayed through the first picture display array, and controls the interference face in the second picture to be displayed through the second picture display array.

Preferably, when the displayed text is displayed as a moving image, for example, the text of a caption displayed in the image, the display controller may directly recognize the display area of the caption, and then directly blur the text in the text display area or the caption display area corresponding to each frame image, thereby directly performing the interference processing on the text in the moving image and preventing the shooting.

It can be seen that, based on the description of the embodiments in fig. 10 to fig. 13, the processing of the first screen further includes a recognition analysis based on optical features and information features in the screen, the recognition analysis can build a recognition model based on deep learning of a neural network, and the recognition model can modify a recognition object through training of a training set, for example, recognizing a human face, recognizing a specific object such as a computer display screen, and the like, thereby having the obvious feature of artificial intelligence. Therefore, key objects needing protection and areas where the key objects need protection can be identified, then interference data are further generated, the interference data can be used as interference data in a second picture after processing of corresponding parts of a first picture, and can also be generated in a targeted mode by constructing an interference database (such as interference on characters), simulating and synthesizing interference data (such as interference on faces and mosaic processing), and the like after identification of information characteristics, so that interference or a better protection effect can be achieved.

In addition, it should be emphasized that the foregoing method has no display influence on the first picture, the display content of the first picture can be clearly seen through the synchronous glasses, and the mixed content displayed on the whole display screen can obtain an interference picture when being shot by the image pickup apparatus. Of course, if there is a higher level information security protection requirement, the specific information feature in the first picture may also be scrambled, so that the first picture may also be partially presented as an interference feature, such as a human face, a character, a computer display interface, and the like.

Further, since the display controller can also set the refresh rate of the display screen, this approach is suitable for the anti-shooting protection of the dynamic video. The display controller further prevents the display screen from being shot by regulating and controlling the refresh rate of the display screen. Preferably, the display controller reduces the refresh rate of the display screen and controls the lower limit of the refresh rate close to the normal viewing of human eyes, so that the display of the image or the video does not affect the viewing of human eyes. However, for the shooting device, because the frame rate of the shooting device is higher or the shutter exposure time is shorter, that is, the shooting frame rate of the shooting device is greater than the refresh rate of the display screen, the shooting device shoots when the display screen does not completely display a frame of image, and thus a frame of incomplete image is shot, or a local image is shot, and the shooting prevention can be effectively performed in this way.

Specifically, a clear picture can be taken on the display screen only when the refresh rate of the ccd (charge coupled device) in the shooting device needs to be adapted to the refresh rate of the display screen. As shown in fig. 14, a first graph TS1 shows a refresh timing chart of a display panel, and a corresponding display period interval is represented by each display time T0, T1, T2, T3, etc., the reciprocal of the display period interval, i.e., T1-T0, is the refresh rate of the display panel, and each display period interval further includes a field scanning time interval Tx1 and a stable display time interval Tx2, which are not necessarily equal, but may be unequal. In the time interval Tx1 of line field scanning, the picture is in line field scanning state, only partially displays the picture content, and is a process of dynamically changing and displaying from incomplete picture to complete picture, after the time period is completed, the complete picture of the frame image is displayed, and the picture is displayed in the time interval Tx 2. Further, when the display screen is shot by the shooting device, the CCD therein also has a certain refresh rate, which corresponds to the second graph TS2 in fig. 14, which shows that the shooting cycle interval corresponding to the shooting device is represented by each time t0, t1, t2, t3, t4, etc., the reciprocal of the shooting cycle interval t1-t0 is the refresh rate of the shooting device, each shooting cycle interval further includes a shooting time interval tx1 and a storage time interval tx2, photosensitive recognition of the external image is completed in the shooting time interval tx1, which is also a dynamic process from incomplete to complete acquisition of the external image, and the shot image is stored in the storage time interval tx2, which are not necessarily equal. It can be seen that, on the second graph TS2, the images beginning to appear at the time T0 in the first graph TS1 cannot be obtained at the corresponding shooting times T0 and T1, because the shot pictures at the shooting times T0 and T1 are partially displayed pictures instead of full pictures in the duration of Tx1, and a full picture of one frame can be shot at the time T2. Similarly, on the second graph TS2, there also correspond to times t4, t5, t7, and t10, a complete image of one frame can be obtained, and t4 and t5 correspond to the same frame image, while the images captured at the times t0, t1, t3, t6, t8, t9, and t11 are all partial images.

Further, with respect to the third graph TS3, it is different from the second graph TS2 in the phase of time, that is, there is a deviation between the time t0 in the third graph TS3 and the time t0 in the second graph TS2, and when the display screen in the first graph TS1 is photographed at the corresponding time in the third graph TS3, it can be seen that a full picture can be photographed at the times t1, t4, t6, t7, t9, and a partial picture is photographed at the other times t0, t2, t3, t5, t8, t 10. Therefore, when the third graph TS3 and the second graph TS2 are compared, although the refresh rates of the two shots are the same, the difference in the time phase of the shots also causes a difference in the distribution of the shot results in time. Therefore, in order to photograph the display screen by the photographing device, it is necessary to make the two devices have good adaptation of the refresh rate and the time phase, which is difficult to be done in practice, because the refresh rate of the photographing device is usually a fixed or limited number of selectable values, and has a high refresh rate value, which is difficult to adapt to the display of the display screen with a low refresh rate.

Further, in fig. 14, for the fourth graph TS4, the shooting cycle intervals T0, T1, T2, T3 corresponding to the graphs are the same as the display cycle intervals T0, T1, T2, T3 corresponding to the first graph TS1, and the selection of the shooting times T0, T1, T2, T3 is just within the time interval Tx2 of stable display in the display cycle interval, so that at this time, good shooting of the display image can be obtained, and therefore, it is necessary to adapt the display refresh rate of the display screen in terms of shooting frequency and phase, which is a relatively ideal effect.

The fourth plot TS4 shows that the refresh rate of the shot is equal to the refresh rate of the display screen, and the shot with phase adaptation can obtain better continuous shot sharpness. In the case that the refresh rate of the shot displayed by the fifth graph TS5 is 2 times of the refresh rate of the display screen, however, due to the unreasonable time phase selection, no effective and complete shot can be obtained at each time of the fifth graph TS5, such as at each time t0, t1, t2, t3, and although the time t2 is within the time interval Tx2 of the stable display of the first graph TS1, since the shooting device is still within the shooting time interval Tx1 from the time t2, since the time staying in the time interval Tx2 of the stable display is short, no good shooting effect can be obtained. In the case where the refresh rate of the shooting displayed in the sixth graph TS6 is 2 times the refresh rate of the display screen, a better shooting effect can be obtained at times t1, t3, t5, and t7 because the time phase is selected reasonably.

As described above with reference to fig. 14, it can be seen that the display effect of the display screen can be better captured only when the refresh rate of the display screen is matched with the refresh rate of the shooting device and the corresponding time phase, otherwise, when the refresh rate of the display screen is low and the refresh rate of the shooting device is high, the shooting device is difficult to reduce the refresh rate to adapt to the refresh rate of the display screen, and there is randomness also in the shooting time phase, which results in that the shooting device cannot obtain a better shooting effect.

Furthermore, in order to prevent the shooting device from being able to recognize and track the refresh rate of the display screen and further synchronize the display of the display screen for shooting, the refresh rate of the display screen can be dynamically adjusted, so that the refresh rate of the display screen dynamically changes within an interval range, and the shooting device is difficult to recognize and track.

As shown in fig. 15, this is to obtain a defective shot picture by shooting the display screen by the shooting device, and it can be seen that there are a plurality of black stripes in the shot picture, and these black stripes are generated because the refresh rate of the whole display screen is set to be low, and the frame rate of shooting by the shooting device is high, so that the whole display screen does not display a complete image frame in a short shooting time range. However, such a picture can be completely seen when observed by human eyes, because human eyes have a visual retention effect, and the reaction time is not as sensitive and fast as that of a shooting device.

Preferably, the refresh rate of the display screen is set at 24-30FPS, i.e. 24-30 frames of images per second, so that when the frame rate of the shooting by a shooting device such as a mobile phone is 60FPS, only half of the displayed images of the display screen can be shot normally during shooting.

Preferably, when the display screen decreases the refresh rate of the display, the display controller is also required to perform applicability adjustment on the frame rate of the video displayed on the first screen, that is, the frame rate of the video and the refresh rate of the display screen are kept synchronous and consistent, and redundant video frames in a unit time are reasonably discarded, so that the continuity of the video display is ensured.

Preferably, the method for frame rate reduction transformation of the original video when the video is played on the display screen includes that the method is implemented by discarding partial frames and recombining the video, for example, discarding 30 frames per second of images, discarding 1 frame every few frames, and recombining the remaining 25 frames into 1 second of video. For example, 30 frames per second of pictures, of which frames 5, 11, 17, 23, 29 are decimated and discarded, no longer appear in the newly composed video.

Preferably, the frame rate reduction and transformation method may further include performing transparent overlap-merge on two adjacent frames, and performing a transition process similar to translucency on the two adjacent frames, that is, performing overlap-merge on two adjacent frames according to different transparent proportions, and re-rendering the two adjacent frames into a new frame.

Preferably, the frame rate reduction conversion method may also be a speed reduction conversion, which is a slow-playing method, that is, playing 30 frames per second is changed to playing 25 frames, but the next 5 frames are not discarded, but are put into the next second, the original 1 second video is changed into 1 second plus 200 milliseconds, and since the video per second is slowed down, the audio is also adjusted accordingly, so that the sound and picture synchronization can be ensured.

It should be noted that, by reducing the refresh rate of the display screen, the method can be used in combination with the shooting method, so that the display security protection effect can be further enhanced.

Preferably, as shown in fig. 16, the synchronous glasses are provided with a temperature sensor for sensing body temperature, and when the temperature sensor does not sense the body temperature close to the human body, the lenses of the synchronous glasses are controlled to be always in a closed state, so that shooting by using the synchronous glasses, for example, shooting by placing the synchronous glasses in front of the camera lens, can be avoided. Further, the temperature sensor is arranged at the inner side position GY1 of the nose pad of the synchronous glasses and is used for sensing the temperature of the human body near the nose; and the temperature sensor is arranged at the inner side position GY2 of the rear end of the clamping legs of the synchronous glasses and is used for sensing the temperature of the human body near the ears. Furthermore, after the synchronous glasses sense the effective human body temperature collected by the temperature sensors at two different positions, the lenses of the synchronous glasses are controlled to be in a normal working state, otherwise, the lenses of the synchronous glasses are controlled to be in a closed state all the time.

Furthermore, the synchronous glasses and the display controller are interconnected through wireless communication, the synchronous glasses receive wireless communication signals from the display controller, and opening actions of lenses of the synchronous glasses are synchronously controlled to be matched with the first picture display, wherein the opening actions comprise opening time synchronization, frequency adaptation and the like. Preferably, the wireless communication signal is a direct sequence spread spectrum signal or a frequency hopping signal which is encrypted and/or has anti-interference capability, so that the wireless communication signal can effectively and reliably carry out synchronous control on the synchronous glasses, and the synchronous glasses are prevented from being interfered and working failure is avoided.

Therefore, the invention discloses a synchronous screen display system for information security protection. The display screen comprises a first picture display array and a second picture display array, the display controller controls the first picture display array and the second picture display array to alternately and respectively display a first picture and a second picture in time, when the first picture is displayed, two lenses of the synchronous glasses are synchronously opened, when the second picture is displayed, the two lenses of the synchronous glasses are synchronously closed, and therefore only the display content of the first picture can be seen through the synchronous glasses. The system realizes normal watching through the synchronous glasses, obtains a scrambled picture when the shooting equipment shoots the display screen, can realize various different scrambling effects through various modes, and is suitable for various application scenes.

Based on the same concept, the invention provides an embodiment of a synchronous screen display method for information security protection.

FIG. 17 is a flowchart illustrating an embodiment of a method for synchronous screen display for information security protection according to the present invention. The method comprises the following steps:

a screen display S10, in which the display controller controls the display screen to alternately and cyclically display a first picture and a second picture in time, the content displayed by the second picture is taken as interference to the first picture, and the picture displayed by the display screen is a scrambled picture mixed with the first picture and the second picture when being shot;

synchronously watching S20, wherein when the display screen displays the first picture, the display controller controls two lenses of the synchronous glasses to be synchronously opened, and the light of the display screen is watched through the two lenses; when the display screen displays the second picture, the display controller controls the two lenses of the synchronous glasses to be synchronously closed, and the light of the display screen is blocked by the two lenses and is not watched, so that only the display content of the first picture can be seen through the synchronous glasses.

Preferably, in the screen display S10, the display screen displays the first picture at the same frame rate as the frame rate at which the second picture is displayed.

Preferably, in the screen displaying S10, the display content of the second picture is obtained by translating, rotating and/or randomly combining the display content of the first picture.

Preferably, in the screen display S10, the entire first screen is divided into a plurality of sub-screens, and the sub-screens in the first screen are respectively subjected to translation, rotation, and/or random combination processing, and then the second screen display content is generated correspondingly.

Preferably, in the screen display S10, when the display screen displays the dynamic video, the image frame displayed by the second picture is the image frame of the first picture after the delay.

Preferably, in the screen display S10, the display controller includes a display morphology analysis for the display data to distinguish between still images and moving video.

Preferably, in the screen displaying S10, the display controller performs recognition analysis on the optical characteristics of the first screen display content, then performs shape-forming display area division on the first screen display content, and then generates the second screen display content after performing translation, rotation and/or random combination processing on each shape-forming area.

Preferably, in the screen displaying step S10, the display controller performs recognition analysis on the information features of the display content of the first picture to obtain a feature region corresponding to the sensitive information features in the first picture, and generates the display content of the corresponding display region of the second picture after scrambling the feature region.

Preferably, in the screen display S10, when the first screen display content includes a character symbol, a character symbol similar to the character symbol is generated as the display content of the second screen correspondence display area.

Preferably, in the screen display S10, the display controller reduces the refresh rate of the display screen and controls the refresh rate at a lower limit near a lower limit of a refresh rate normally viewed by human eyes.

Preferably, in the synchronous watching S20, the synchronous glasses are provided with a temperature sensor for sensing a body temperature, and when the temperature sensor does not sense the body temperature, the lenses of the synchronous glasses are controlled to be in a closed state.

The method realizes normal watching through synchronous glasses by circularly displaying the first picture and the second picture and carrying out different controls when different pictures are displayed, obtains the scrambled pictures when the shooting equipment shoots the display screen, can realize various different scrambling effects through various modes, and is suitable for various application scenes.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.

Claims

1. A synchronized screen display system for information security protection, comprising: the display screen is controlled by the display controller to alternately and circularly display a first picture and a second picture in time, the content displayed by the second picture is used as interference to the first picture, and the picture displayed by the display screen is a scrambled picture mixed with the first picture and the second picture when being shot;

correspondingly, when the display screen displays the first picture, the display controller controls the two lenses of the synchronous glasses to be synchronously opened, and the light of the display screen is watched through the two lenses; when the display screen displays the second picture, the display controller controls the two lenses of the synchronous glasses to be synchronously closed, and the light of the display screen is blocked by the two lenses and is not watched, so that only the display content of the first picture can be seen through the synchronous glasses.

2. A synchronized screen display system for information security protection according to claim 1, wherein the display content of the second screen is obtained by translating, rotating and/or randomly combining the display content of the first screen.

3. A synchronized screen display system for information security protection according to claim 1, wherein the entire first frame is divided into a plurality of sub-frames, and the sub-frames in the first frame are respectively shifted, rotated and/or randomly combined to generate the second frame display content.

4. The synchronized screen display system of claim 1, wherein the second frame displays the image frame after the first frame is delayed when the display screen displays the dynamic video.

5. A synchronized screen display system for information security protection according to claim 1, wherein the display controller includes a display modality analysis of the display data to distinguish between still images and moving video.

6. The synchronous screen display system for information security protection according to claim 1, wherein the display controller performs recognition analysis on optical characteristics of the first screen display content, performs shape-forming display area division on the first screen display content, and generates the second screen display content after performing translation, rotation and/or random combination processing on each shape-forming area.

7. The system of claim 1, wherein the display controller performs recognition analysis on the information characteristics of the display content of the first frame to obtain a characteristic region corresponding to the sensitive information characteristics in the first frame, and generates the display content of the corresponding display region of the second frame after scrambling the characteristic region.

8. The synchronized screen display system of claim 1, wherein when the first screen display content includes a text symbol, a text symbol similar to the text symbol is generated as the display content of the second screen corresponding display area.

9. A synchronized screen display system for information security protection according to claim 1, wherein the display controller further prevents the display screen from being filmed by regulating the refresh rate of the display screen.

10. A synchronized screen display system for information security according to claim 1, wherein the synchronized glasses are provided with a temperature sensor for sensing body temperature, and when the temperature sensor does not sense body temperature, the lenses of the synchronized glasses are controlled to be in a closed state.