CN109726603B - Image display method and device - Google Patents
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Abstract
The disclosure provides an image display method and device, relates to the technical field of image processing, and can solve the problem that contents displayed on a display screen have risks of being leaked by photographing. The specific technical scheme is as follows: acquiring a target image, wherein the target image comprises at least one of an image and characters; dividing a target image into at least two image areas, and obtaining at least two image content frames, wherein one image content frame comprises one image area; and sequentially displaying at least two image content frames according to a preset sequence, wherein each image content frame of the at least two image content frames is displayed at least once in a preset time. The disclosure is used for preventing contents on a display screen from being leaked by photographing.
Description
Technical Field
The present disclosure relates to the field of image processing technologies, and in particular, to an image display method and apparatus.
Background
With the development of technology, the display screen displays image content more clearly, and the image content may include all content that can be displayed by the display screen, such as images, characters, and the like. However, if the content displayed on the display screen needs to be kept secret, and leakage is prevented, the pictures shot by various shooting devices on the screen can clearly reflect the content displayed on the display screen, and even if the content displayed on the display screen is encrypted, the risk of leakage through direct shooting still exists.
Disclosure of Invention
The embodiment of the disclosure provides an image display method and device, which can solve the problem that contents displayed on a display screen have risks of being leaked by photographing. The technical scheme is as follows:
according to a first aspect of embodiments of the present disclosure, there is provided an image display method including:
acquiring a target image, wherein the target image comprises at least one of an image and characters;
dividing a target image into at least two image areas, and obtaining at least two image content frames, wherein one image content frame comprises one image area;
and sequentially displaying at least two image content frames according to a preset sequence, wherein each image content frame of the at least two image content frames is displayed at least once in a preset time.
Each image content frame only displays one image area, and does not display a complete target image, if a shooting device is used for shooting, the content of only one image area can be shot, and because the vision of human eyes stays, at least two image content frames are displayed within the preset time, and the content of the complete target image can be seen by the human eyes, so that the risk that the content displayed on a display screen is shot and leaked is reduced under the condition that a user normally browses.
In one embodiment, sequentially displaying at least two frames of image content in a preset ordering includes:
displaying the preset image frame once after displaying one image content frame each time according to the preset sequence, wherein the brightness of the preset image frame is greater than the preset brightness.
The preset image frame has higher brightness, and when the shooting device is used for shooting at a long distance, only the preset image frame with high brightness can be shot, so that the risk that the content displayed on the display screen is leaked by shooting is further reduced.
In one embodiment, the method further comprises:
arranging at least two image content frames according to a preset sequence;
adding at least one preset image frame in at least two image content frames to form an image frame sequence, wherein each image frame in the at least one preset image frame is positioned between the two image content frames, and the brightness of the preset image frame is greater than the preset brightness;
sequentially displaying at least two image content frames according to a preset sequence, comprising:
and sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
In one embodiment, the method further comprises:
arranging at least two image content frames according to a preset sequence;
adding a preset image frame between every two image content frames in at least two image content frames to form an image frame sequence;
sequentially displaying at least two image content frames according to a preset sequence, comprising:
and sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
In one embodiment, the time for each display of the image frame is preset to be a first time length, and the time for each display of the image content frame is preset to be a second time length, and the first time length is greater than the second time length.
The preset image frame has higher brightness and longer display time, and when the shooting device is used for shooting at a long distance, the exposure time is long, and only the high-brightness preset image frame can be shot, so that the risk of leakage of the shot contents displayed on the display screen is further reduced.
In one embodiment, the ratio of the first length of time to the second length of time is within [2, 256 ].
In one embodiment, dividing the target image into at least two image regions comprises:
dividing a target image into at least two image blocks;
at least two image areas are determined from the at least two image blocks, an image area comprising at least one image block.
In an embodiment the side length of the image block ranges from 1/150 the side length of the display screen to 1/2 the side length of the display screen.
In one embodiment, the side length of the image block is 1/3 times the side length of the characters in the target image.
According to a second aspect of the embodiments of the present disclosure, there is provided an image display device including: the device comprises an acquisition module, a division module and a display module;
the system comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a target image, and the target image comprises at least one of an image and characters;
the device comprises a dividing module, a processing module and a display module, wherein the dividing module is used for dividing a target image into at least two image areas and obtaining at least two image content frames, and one image content frame comprises one image area;
and the display module is used for sequentially displaying the at least two image content frames according to a preset sequence, and each image content frame of the at least two image content frames is displayed at least once in a preset time.
In an embodiment, the display module is further configured to display the preset image frame once after displaying one image content frame each time according to the preset sequence, where the brightness of the preset image frame is greater than the preset brightness.
In one embodiment, the time for each display of the image frame is preset to be a first time length, and the time for each display of the image content frame is preset to be a second time length, and the first time length is greater than the second time length.
In one embodiment, the ratio of the first length of time to the second length of time is within [2, 256 ].
In one embodiment, the image display apparatus further comprises a sorting module;
the sorting module is used for sorting at least two image content frames according to a preset sorting order; adding a preset image frame between every two image content frames in at least two image content frames to form an image frame sequence;
and the display module is further used for sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
In one embodiment, the division module includes an image block unit and an image area unit;
an image block unit for dividing a target image into at least two image blocks;
an image area unit for determining at least two image areas from the at least two image blocks, an image area comprising at least one image block.
In an embodiment the side length of the image block ranges from 1/150 the side length of the display screen to 1/2 the side length of the display screen.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flowchart of an image display method provided by an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a frame of image content provided by an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating an image block division effect according to an embodiment of the disclosure;
fig. 4 is a schematic diagram of an image content frame display effect provided by an embodiment of the present disclosure;
fig. 5a is a schematic diagram of an image frame sequence provided by an embodiment of the present disclosure;
fig. 5b is a schematic diagram of an image display effect provided by the embodiment of the disclosure;
fig. 5c is a schematic diagram of a shooting effect provided by the embodiment of the disclosure;
fig. 6 is a structural diagram of an image display apparatus provided in an embodiment of the present disclosure;
fig. 7 is a structural diagram of an image display apparatus provided in an embodiment of the present disclosure;
fig. 8 is a structural diagram of an image display device according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
An embodiment of the present disclosure provides an image display method, as shown in fig. 1, fig. 1 is a flowchart of the image display method provided in the embodiment of the present disclosure, and the image display method includes the following steps:
101. and acquiring a target image.
The target image includes at least one of an image and a text. The target image may be a frame of picture, or a frame of picture in a video, or a display interface of an application or a display interface of an operating system, and the target image may be any image that can be displayed on a display screen.
102. The target image is divided into at least two image areas and at least two image content frames are obtained.
One frame of image content contains one image area. It should be noted that, for one image content frame, as shown in fig. 2, fig. 2 is a schematic diagram of an image content frame provided by the embodiment of the present disclosure. Taking the image content frame a as an example, the image content frame a includes an image area a, and is divided into four areas, namely a first area, a second area, a third area and a fourth area, where the image area a is located in the first area and the fourth area, the size of the image content frame a is the same as that of the target image, the image area a occupies only two areas of the image content frame, other areas of the image content frame a except the image area a may be filled with preset images, that is, the second area and the third area, and the preset images may be blank images, for example, pure white images.
In one embodiment, dividing the target image into at least two image regions comprises:
dividing a target image into at least two image blocks; at least two image areas are determined from the at least two image blocks, an image area comprising at least one image block.
The side length of the image block may be set by itself, for example, the side length of the image block may range from 1/150 the side length of the display screen to 1/2 the side length of the display screen. In one embodiment, the side length of the image block is 1/3 of the side length of the characters in the target image; for another example, the side length of the image block may be set according to the number of pixels, for example, the side length of the image block may be 4 pixels in length. Of course, this is merely an example and does not represent a limitation of the present disclosure.
As shown in fig. 3, fig. 3 is a schematic diagram of an image block division effect provided by an embodiment of the present disclosure. In fig. 3, the target image is divided into 9 image blocks, the side length of each image block is just 1/3 of the side length of a character, and 5 image blocks in 1 st row, 3 rd column, 2 nd row, 2 nd column, 3 rd row, 1 st column and 3 rd row, 3 rd column in the 9 image blocks are used as a first image area; the 4 image blocks of the 1 st row, 2 nd column, 2 nd row, 1 st column, 2 nd row, 3 rd column and 3 rd row, 2 nd column are taken as a second image area. Of course, this is merely an example and does not represent a limitation of the present disclosure.
103. And sequentially displaying at least two image content frames according to a preset sequence.
Each of the at least two frames of image content is displayed at least once during a preset time.
Each image content frame only displays one image area, and does not display a complete target image, if a shooting device is used for shooting, the content of only one image area can be shot, and because the vision of human eyes stays, at least two image content frames are displayed within the preset time, and the content of the complete target image can be seen by the human eyes, so that the risk that the content displayed on a display screen is shot and leaked is reduced under the condition that a user normally browses.
There may be multiple application scenarios for sequentially displaying at least two image content frames according to a preset sequence, and two application scenarios are listed below for description:
in a first application scenario, only image content frames are displayed;
arranging at least two image content frames according to a preset sequence to form an image frame sequence, and then sequentially displaying the image frames in the image frame sequence. For example, as shown in fig. 4, fig. 4 is a schematic diagram of an image content frame display effect provided by the embodiment of the present disclosure; dividing a target image into 4 image blocks, wherein the 1 st image block is arranged at the upper left corner, the 2 nd image block is arranged at the upper right corner, the 3 rd image block is arranged at the lower left corner, and the 4 th image block is arranged at the lower right corner; forming 2 image areas to obtain 2 image content frames, wherein the 1 st image content frame comprises a 1 st image block and a 4 th image block, and the 2 nd image content frame comprises a 2 nd image block and a 3 rd image block; and circularly displaying 2 image content frames according to the sequence of the 1 st image content frame and the 2 nd image content frame.
It should be noted that, if the period duration T is the time length of sequentially displaying at least two image content frames 1 time, then T is less than or equal to the shortest time length of human visual persistence.
In the second application scenario, an image content frame and a preset image frame are displayed, the preset image frame may be a pure white image with the same size as the image content frame, and the second application scenario may have a plurality of implementation manners, which are described by taking 3 implementation manners as an example:
in a first implementation, sequentially displaying at least two frames of image content according to a preset ordering includes:
displaying the preset image frame once after displaying one image content frame each time according to the preset sequence, wherein the brightness of the preset image frame is greater than the preset brightness.
Certainly, the preset image frame can also be displayed before each image content frame, the preset image frame can be a pure white image with the same size as the image content frame, the preset image frame is high in brightness, when the shooting device is used for shooting remotely, only the preset image frame with high brightness can be shot, and the risk that the content displayed on the display screen is shot and leaked is further reduced.
In a second implementation, the method further comprises:
arranging at least two image content frames according to a preset sequence;
adding at least one preset image frame in at least two image content frames to form an image frame sequence, wherein each image frame in the at least one preset image frame is positioned between the two image content frames, and the brightness of the preset image frame is greater than the preset brightness;
sequentially displaying at least two image content frames according to a preset sequence, comprising:
and sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
At least one preset image frame is added between at least two image content frames, and not necessarily one preset image frame is arranged before or after each image content frame, so that the effect of preventing photographing leakage can be achieved, and the number of image frames in an image frame sequence can be reduced.
In a third implementation, the method further comprises:
arranging at least two image content frames according to a preset sequence;
adding a preset image frame between every two image content frames in at least two image content frames to form an image frame sequence;
sequentially displaying at least two image content frames according to a preset sequence, comprising:
and sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
It should be noted that, at least two image content frames and at least one preset image frame may be arranged according to a preset sequence to form an image frame sequence, and then the image frames are sequentially displayed; alternatively, a predetermined image frame may be displayed every time an image frame sequence is displayed, without first forming an image frame sequence and displaying the image frame sequence while ordering the image frame sequence. Of course, two display modes are only exemplified here, and the disclosure does not limit this, but only describes that the image frames are displayed according to a preset sequence, and the sequence of the formed image frames may be displayed before the display, or the sequence may be formed while the display is performed.
In one embodiment, the time for each display of the image frame is preset to be a first time length, and the time for each display of the image content frame is preset to be a second time length, and the first time length is greater than the second time length.
In one embodiment, the ratio of the first length of time to the second length of time is within [2, 256 ].
How much effective information is displayed once can be selected according to the display capability of the device, for example, T is selected to be 1/10 seconds, if 1/120 seconds are required for displaying one image frame, 12 image frames can be displayed in each T, and if the ratio of the first time length to the second time length is 2:1, 12/(2+1) ═ 4, then 1/4 effective information can be displayed each time, that is, the target image is divided into 4 image regions, so as to obtain 4 image content frames.
The preset image frame has higher brightness and longer display time, and when the shooting device is used for shooting at a long distance, the exposure time is long, and only the high-brightness preset image frame can be shot, so that the risk of leakage of the shot contents displayed on the display screen is further reduced.
In conjunction with a second application scenario, as shown in fig. 5a, fig. 5a is a schematic diagram of an image frame sequence provided by an embodiment of the present disclosure; the target image comprises a black letter 'A', the target image is divided into 4 image blocks, the 1 st image block is arranged at the upper left corner, the 2 nd image block is arranged at the upper right corner, the 3 rd image block is arranged at the lower left corner, and the 4 th image block is arranged at the lower right corner; forming 2 image areas to obtain 2 image content frames, wherein the 1 st image content frame comprises a 1 st image block and a 4 th image block, and the 2 nd image content frame comprises a 2 nd image block and a 3 rd image block; and forming an image frame sequence by the target image content frame and a preset image frame according to the sequence of the preset image frame, the 1 st image content frame, the preset image frame and the 2 nd image content frame for displaying, wherein the preset image frame is a pure white image, the preset image frame is displayed for 45ms, and the image content frame is displayed for 5 ms. As shown in fig. 5b, fig. 5b is a schematic diagram of an image display effect provided by the embodiment of the present disclosure, a target image seen by human eyes is a gray letter "a", as shown in fig. 5c, fig. 5c is a schematic diagram of a shooting effect provided by the embodiment of the present disclosure, a close-distance shooting display screen obtains incomplete information, and only the 1 st image content frame, or the 2 nd image content frame, or a preset image frame can be shot; the long-distance shooting only can shoot a pure white preset image frame because the exposure time is long and the preset image frame display time is long.
According to the image display method provided by the embodiment of the disclosure, the target image is divided into at least two image areas, only one image area is displayed in each display, the complete target image is not displayed, and if the target image is shot by the shooting device, only the content of one image area can be shot, so that the risk that the content displayed on the display screen is leaked by shooting is reduced.
Based on the image display method described in the embodiment corresponding to fig. 1, the following is an embodiment of the apparatus of the present disclosure, which can be used to execute the embodiment of the method of the present disclosure.
An embodiment of the present disclosure provides an image display device, as shown in fig. 6, the image display device 60 including: an acquisition module 601, a division module 602, and a display module 603;
the acquiring module 601 is configured to acquire a target image, where the target image includes at least one of an image and a text;
a dividing module 602, configured to divide a target image into at least two image areas and obtain at least two image content frames, where an image content frame includes an image area;
the display module 603 is configured to sequentially display at least two image content frames according to a preset sequence, where each of the at least two image content frames is displayed at least once within a preset time.
In one embodiment, the display module 603 is further configured to display the preset image frame once after displaying one image content frame each time according to the preset sequence, where the brightness of the preset image frame is greater than the preset brightness.
In one embodiment, the time for each display of the image frame is preset to be a first time length, and the time for each display of the image content frame is preset to be a second time length, and the first time length is greater than the second time length.
In one embodiment, the ratio of the first length of time to the second length of time is within [2, 256 ].
In one embodiment, as shown in FIG. 7, image display device 60 further includes a sorting module 604;
a sorting module 604, configured to arrange at least two image content frames according to a preset sorting; adding a preset image frame between every two image content frames in at least two image content frames to form an image frame sequence;
the display module 603 is further configured to sequentially display the image frames in the image frame sequence according to the ordering of the image frame sequence.
In one embodiment, as shown in fig. 8, the partitioning module 602 includes an image block unit 6021 and an image area unit 6022;
an image block unit 6021 for dividing the target image into at least two image blocks;
an image region unit 6022 for determining at least two image regions from the at least two image blocks, an image region comprising at least one image block.
In an embodiment the side length of the image block ranges from 1/150 the side length of the display screen to 1/2 the side length of the display screen.
The image display device provided by the embodiment of the disclosure divides the target image into at least two image areas, only one image area is displayed each time, a complete target image is not displayed, and if the target image is shot by the shooting device, only the content of one image area can be shot, so that the risk that the content displayed on the display screen is leaked by shooting is reduced. .
Based on the image display method described in the embodiment corresponding to fig. 1, an embodiment of the present disclosure further provides a computer-readable storage medium, for example, the non-transitory computer-readable storage medium may be a Read Only Memory (ROM), a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like. The storage medium stores computer instructions for executing the image display method described in the embodiment corresponding to fig. 1, which is not described herein again.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (14)
1. An image display method, characterized in that the method comprises:
acquiring a target image, wherein the target image comprises at least one of an image and characters;
dividing the target image into at least two image areas, and obtaining at least two image content frames, wherein one image content frame comprises one image area;
sequentially displaying the at least two image content frames according to a preset sequence, wherein each image content frame of the at least two image content frames is displayed at least once within a preset time;
the sequentially displaying at least two image content frames according to a preset sequence comprises:
arranging the at least two image content frames according to the preset sequence;
adding at least one preset image frame in the at least two image content frames to form an image frame sequence, wherein each image frame in the at least one preset image frame is positioned between the two image content frames, and the brightness of the preset image frame is greater than the preset brightness;
and sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
2. The method of claim 1, wherein displaying the at least two frames of image content in sequence in a preset ordering comprises:
and displaying a preset image frame once after displaying one image content frame each time according to the preset sequence, wherein the brightness of the preset image frame is greater than the preset brightness.
3. The method of claim 2,
the time for displaying each preset image frame is a first time length, the time for displaying each image content frame is a second time length, and the first time length is greater than the second time length.
4. The method of claim 3,
a ratio of the first length of time to the second length of time is within [2, 256 ].
5. The method of claim 1, further comprising:
arranging the at least two image content frames according to the preset sequence;
adding a preset image frame between every two image content frames in the at least two image content frames to form an image frame sequence;
sequentially displaying the at least two image content frames according to a preset sequence, comprising:
and sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
6. The method of any one of claims 1-5, wherein dividing the target image into at least two image regions comprises:
dividing the target image into at least two image blocks;
determining the at least two image areas according to the at least two image blocks, one of the image areas comprising at least one image block.
7. The method of claim 6,
the side length of each of the at least two image blocks ranges from 1/150 the side length of the display screen to 1/2 the side length of the display screen.
8. An image display apparatus, comprising: the device comprises an acquisition module, a division module and a display module;
the acquisition module is used for acquiring a target image, and the target image comprises at least one of an image and characters;
the dividing module is used for dividing the target image into at least two image areas and obtaining at least two image content frames, wherein one image content frame comprises one image area;
the display module is used for sequentially displaying the at least two image content frames according to a preset sequence, and each image content frame of the at least two image content frames is displayed at least once within a preset time;
the display module is specifically configured to arrange the at least two image content frames according to the preset sequence;
adding at least one preset image frame in the at least two image content frames to form an image frame sequence, wherein each image frame in the at least one preset image frame is positioned between the two image content frames, and the brightness of the preset image frame is greater than the preset brightness;
and sequentially displaying the image frames in the image frame sequence according to the sequence of the image frame sequence.
9. The apparatus of claim 8,
the display module is further configured to display a preset image frame once after displaying one image content frame each time according to the preset sequence, where the brightness of the preset image frame is greater than the preset brightness.
10. The apparatus of claim 9,
the time for displaying each preset image frame is a first time length, the time for displaying each image content frame is a second time length, and the first time length is greater than the second time length.
11. The apparatus of claim 10,
a ratio of the first length of time to the second length of time is within [2, 256 ].
12. The apparatus of claim 8, wherein the image display apparatus further comprises a sorting module;
the sorting module is used for sorting the at least two image content frames according to the preset sorting; adding a preset image frame between every two image content frames in the at least two image content frames to form an image frame sequence;
the display module is further configured to sequentially display the image frames in the image frame sequence according to the sequence of the image frame sequence.
13. The apparatus according to any one of claims 8-12, wherein the partitioning module comprises an image block unit and an image area unit;
the image block unit is used for dividing the target image into at least two image blocks;
the image area unit is configured to determine the at least two image areas according to the at least two image blocks, where one image area includes at least one image block.
14. The apparatus of claim 13,
the side length of each of the at least two image blocks ranges from 1/150 the side length of the display screen to 1/2 the side length of the display screen.
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| US9236018B2 (en) * | 2013-02-08 | 2016-01-12 | Panasonic Liquid Crystal Display Co., Ltd. | Reducing deterioration in display quality of a displayed image on a display device |
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