CN109886855A - A kind of non display watermark generation method of human eye - Google Patents
A kind of non display watermark generation method of human eye Download PDFInfo
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- CN109886855A CN109886855A CN201910131426.3A CN201910131426A CN109886855A CN 109886855 A CN109886855 A CN 109886855A CN 201910131426 A CN201910131426 A CN 201910131426A CN 109886855 A CN109886855 A CN 109886855A
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- watermark
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003780 insertion Methods 0.000 claims abstract description 14
- 230000037431 insertion Effects 0.000 claims abstract description 14
- 238000004040 coloring Methods 0.000 claims description 3
- 239000008398 formation water Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
The present invention relates to a kind of non display picture watermark generation methods of human eye.The duration of same fixed position of the watermark of insertion in display image in one second is enabled to be no more than 0.1 second, watermarking process is superimposed to use to the overlapping region progress brightness jitter formation watermark profile in primitive frame image, due to the time that watermark occurs in same position be less than human eye perceive the time and using the final average value of brightness jitter method it is consistent with original image, to reach the non display watermark insertion of human eye.The watermark human eye that the method for the present invention realizes insertion can not perceive, and can be perceived by high-speed camera picture pick-up device.
Description
Technical field
The present invention relates to a kind of non display watermark generation method of human eye, this method is not less than applied to frame per second
The display equipment of 24 frames.
Background technique
Show that superposition watermark is warning or a kind of most direct method that tracked information is revealed on picture in display.In order to subtract
Few interference of the watermark to user's vision, traditional mode are with watermark superposition shallow as far as possible on user's picture, this is a kind of use
The directly visible superposition water mark method in family, this patent proposes a kind of watermark generation method for display, to normal human eye
It is invisible, but the existing watermark being superimposed can be then observed in the photo of shooting when user claps equipment by high speed record.
Human eye is limited to the speed of image response, for there are time very short image human eyes can not perceive, one
As think that the image human eye less than 0.1 second there are the time is invisible, for the image that brightness is switched fast, human eye also can be to brightness
Do being averaged for an appropriateness.Modern display belongs to dynamic refresh mode, and such as current display refresh rate is both greater than
60hz, if only having a frame to have localized watermark in the picture of 60 frames, time of occurrence is lower than 0.017 second, should in other 59 frames
Watermark is all not present, then user is not felt by the watermark and occurred.Further, if the position that watermark occurs respectively in 60 frames
(moving in screen) is not overlapped, for a regional area, guarantees that watermark is lower than 0.1 second in the total time that the image occurs,
It then still can't see the watermark in the region for a user.The face of holding and original image is further processed to the watermark region of superposition
Color is consistent but brightness is variant, can reduce watermark figure and import impact of the energy ingredient of frequency to vision；Further to impact
The consistency of vision can be kept as far as possible by carrying out reversed supplement.Watermark external for this dynamic, when take pictures at a high speed,
Due to crawl be display a frame picture, then it can be seen that watermark there are images.
Summary of the invention
The purpose of the present invention is to provide a kind of non display watermark generation methods of human eye, are perceived using human eye
Response speed and eye storage characteristic, by the insertion same color but differentiated watermark of brightness, and watermark is in one second
Duration in the same fixed position of display image is no more than 0.1 second, so that reaching the watermark human eye of insertion can not perceive,
And high-speed camera equipment can perceive.
To achieve the above object, the technical scheme is that a kind of human eye non display watermark generation side
Method, which is characterized in that the duration of same fixed position of the watermark of insertion in display image in one second is enabled to be no more than
0.1 second, and to show that the pixel intensity mean value of the same fixed position of image is consistent with original pixel brightness value, to reach
The non display watermark insertion of human eye.
In an embodiment of the present invention, it is described make show image same fixed position pixel intensity mean value with it is original
The consistent implementation of pixel brightness value are as follows: carried out by the watermark areas original pixels of the same fixed position to display image bright
Degree shake generates watermark, that is, keeps the colouring information of original pixel, by the same fixed bit to display image when eliminating watermark
The watermark areas pixel intensity set carries out Contrary compensation, to keep final pixel average brightness consistent.
In an embodiment of the present invention, this method specifically comprises the following steps:
Step S1, the synchronization frame information of display equipment is obtained；
Step S2, according to display frame size and watermark size calculates watermark location and watermark maximum may occur in which the time；
Step S3, it obtains the pixel value that in display image and watermark is overlapping and carries out offset or lower offset predetermined brightness value formation water
Print the gray scale difference in area；
Step S4, the present frame for being inserted into watermark is shown over the display；
Step S5, the synchronizing information of a new frame is obtained；
Step S6, reversed luminance compensation is carried out in new frame original watermark areas, while mobile watermark areas is to non-overlapping with former watermark areas
Region；
Step S7, step S4 to S7 is repeated.
Compared to the prior art, the invention has the following advantages: the present invention utilizes human eye disturbance of perception, the water of insertion
The duration for being imprinted on the same fixed position in display image in one second is no more than 0.1 second, to reach the watermark of insertion
Human eye can not perceive, and picture pick-up device can perceive；And then it realizes and prevents taking pictures, the purpose of anti-information leakage.
Detailed description of the invention
Fig. 1 is watermark generation type schematic diagram of the present invention.
Fig. 2 is that the watermark location of an example of the invention schematic diagram occurs.
Specific embodiment
With reference to the accompanying drawing, technical solution of the present invention is specifically described.
The present invention provides a kind of non display watermark generation methods of human eye, enable the watermark of insertion in one second
The duration of same fixed position in display image is no more than 0.1 second, and makes the same fixed position for showing image
Pixel intensity mean value it is consistent with original pixel brightness value (using the same single pixel luminance difference value of before and after frames due to persistence of vision
And mean value can be taken, the remaining spy of human eye vision more than human eye response frequency and is utilized by the variation watermarking images frequency of occurrences
Point), to reach the non display watermark insertion of human eye.The pixel of the same fixed position for show image
Luminance mean value and the consistent implementation of original pixel brightness value are as follows: pass through the watermark areas of the same fixed position to display image
Original pixels carry out brightness jitter and generate watermark, that is, keep the colouring information of original pixel, by scheming to display when eliminating watermark
The watermark areas pixel intensity of the same fixed position of picture carries out Contrary compensation, to keep final pixel average brightness consistent.It should
Method specifically comprises the following steps:
Step S1, the synchronization frame information of display equipment is obtained；
Step S2, according to display frame size and watermark size calculates watermark location and watermark maximum may occur in which the time；
Step S3, it obtains the pixel value that in display image and watermark is overlapping and carries out offset or lower offset predetermined brightness value formation water
Print the gray scale difference in area；
Step S4, the present frame for being inserted into watermark is shown over the display；
Step S5, the synchronizing information of a new frame is obtained；
Step S6, reversed luminance compensation is carried out in new frame original watermark areas, while mobile watermark areas is to non-overlapping with former watermark areas
Region；
Step S7, step S4 to S7 is repeated.
Fig. 1 is watermark generation type schematic diagram of the present invention, in figure, for a region in one frame picture of interception, if showing frame
Rate is F, and what which showed in the frame of F-3 is all original image information, and wherein two frames are that watermark figure is based on to three frames of deduction
Original image brightness carries out floating up and down the watermark figure of variation insertion, if the primitive frame pixel intensity is B, wobble variation is
Delta, then the brightness of a frame is B-delta, and in addition a frame is B+delta；Average brightness remains as B, this processing and original
Figure, which is a difference in that, forms watermark profile.In order to be further reduced watermark always in the possible influence in the same region, to water
Dynamic change is done in print position, keeps new watermark location and old watermark location not to be overlapped, as shown in Figure 1.Guarantee any one in this way
Region is all no-watermark region in the mainly display time, but at least one watermark is embedded in a frame.
For the method for the present invention for there is dynamic frame to show equipment, the dynamic frame shows that equipment frame per second is greater than 60, if display
Frame per second is F, then should be lower than 6/F (less than 0.1 second) per second, also in the total time that same watermark information occurs in the same position
It is in display equipment of the frame per second more than or equal to 60, the totalframes that same watermark occurs in same position is (total no more than F/10 frame
Time controlled within the scope of 0.1 second).Again because each frame in all include a watermark, can release have 10 or more no
It is imprinted on inside these regions with position candidate regional water supply and does not repeat switching and user can be realized not directly observe, entire mistake
Journey is as shown in Figure 2.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (3)
1. a kind of non display watermark generation method of human eye, which is characterized in that enable the watermark of insertion in one second
Duration in the same fixed position of display image is no more than 0.1 second, and makes the same fixed position for showing image
Pixel intensity mean value is consistent with original pixel brightness value, to reach the non display watermark insertion of human eye.
2. the non display watermark generation method of a kind of human eye according to claim 1, which is characterized in that described
So that the pixel intensity mean value and the consistent implementation of original pixel brightness value of the same fixed position of display image are as follows: pass through
Brightness jitter is carried out to the watermark areas original pixels of the same fixed position of display image and generates watermark, that is, keeps original pixel
Colouring information carries out Contrary compensation by the watermark areas pixel intensity of the same fixed position to display image when eliminating watermark,
To keep final pixel average brightness consistent.
3. the non display watermark generation method of a kind of human eye according to claim 1, which is characterized in that the party
Method specifically comprises the following steps:
Step S1, the synchronization frame information of display equipment is obtained；
Step S2, according to display frame size and watermark size calculates watermark location and watermark maximum may occur in which the time；
Step S3, it obtains the pixel value that in display image and watermark is overlapping and carries out offset or lower offset predetermined brightness value formation water
Print the gray scale difference in area；
Step S4, the present frame for being inserted into watermark is shown over the display；
Step S5, the synchronizing information of a new frame is obtained；
Step S6, reversed luminance compensation is carried out in new frame original watermark areas, while mobile watermark areas is to non-overlapping with former watermark areas
Region；
Step S7, step S4 to S7 is repeated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910131426.3A CN109886855A (en) | 2019-02-22 | 2019-02-22 | A kind of non display watermark generation method of human eye |
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| CN201910131426.3A CN109886855A (en) | 2019-02-22 | 2019-02-22 | A kind of non display watermark generation method of human eye |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112969080A (en) * | 2021-02-24 | 2021-06-15 | 刘桂华 | Image processing method, system, equipment and storage medium |
| CN113284035A (en) * | 2021-06-01 | 2021-08-20 | 江苏鑫合易家信息技术有限责任公司 | System and method for generating dynamic picture with two-dimensional code watermark |
| CN115002377A (en) * | 2022-08-04 | 2022-09-02 | 湖北微模式科技发展有限公司 | Video recording method for realizing privacy protection |
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| GB0006697D0 (en) * | 2000-03-20 | 2000-05-10 | British Broadcasting Corp | Watermarking |
| JP2001203880A (en) * | 2000-01-24 | 2001-07-27 | Kowa Co | Method for embedding, extracting and making invisible and visible electronic watermark and device for embedding the same |
| CN1516451A (en) * | 1997-08-29 | 2004-07-28 | ��ʿͨ��ʽ���� | Movable image watermark insertion device and watermark insertion method |
| CN104766269A (en) * | 2015-04-16 | 2015-07-08 | 山东大学 | Spread transform dither modulation watermarking method based on JND brightness model |
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2019
- 2019-02-22 CN CN201910131426.3A patent/CN109886855A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| CN1516451A (en) * | 1997-08-29 | 2004-07-28 | ��ʿͨ��ʽ���� | Movable image watermark insertion device and watermark insertion method |
| JP2001203880A (en) * | 2000-01-24 | 2001-07-27 | Kowa Co | Method for embedding, extracting and making invisible and visible electronic watermark and device for embedding the same |
| GB0006697D0 (en) * | 2000-03-20 | 2000-05-10 | British Broadcasting Corp | Watermarking |
| CN104766269A (en) * | 2015-04-16 | 2015-07-08 | 山东大学 | Spread transform dither modulation watermarking method based on JND brightness model |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112969080A (en) * | 2021-02-24 | 2021-06-15 | 刘桂华 | Image processing method, system, equipment and storage medium |
| CN113284035A (en) * | 2021-06-01 | 2021-08-20 | 江苏鑫合易家信息技术有限责任公司 | System and method for generating dynamic picture with two-dimensional code watermark |
| CN115002377A (en) * | 2022-08-04 | 2022-09-02 | 湖北微模式科技发展有限公司 | Video recording method for realizing privacy protection |
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Application publication date: 20190614 |