CN105898324A - Video watermark hidden insertion method and device - Google Patents
Video watermark hidden insertion method and device Download PDFInfo
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- CN105898324A CN105898324A CN201510890358.0A CN201510890358A CN105898324A CN 105898324 A CN105898324 A CN 105898324A CN 201510890358 A CN201510890358 A CN 201510890358A CN 105898324 A CN105898324 A CN 105898324A
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- watermark
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
- H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
- H04N1/3232—Robust embedding or watermarking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8358—Generation of protective data, e.g. certificates involving watermark
Abstract
The invention provides a video watermark hidden insertion method and device. According to the size of a default watermark information matrix, a video frame to be processed is adaptively divided into blocks to acquire video image blocks. The watermark information matrix is inserted into the video image blocks. Video digital encryption is realized, and at the same time the video image quality is ensured.
Description
Technical field
The present embodiments relate to video technique field, particularly relate to a kind of video watermark and hide insertion method
And device.
Background technology
Along with the extensive application of Digital Media (digital picture, DAB, digital video), its copyright is protected
Protecting also seems becomes more and more important.
Computer networking technology and multimedia technology develop rapidly the work to people and life brings huge
Big facility, video media easily obtains due to it, replicates simple and more coming of propagating that the advantage such as rapidly is
The most artistic work, invention and intention are all expressed with the form of video data.But utilize network
Open and sharing, distorts original works, forges, replicates and illegal distribution becomes one
Easy to do thing, seriously compromise creation of works person and interests of user.Therefore, how to protect
The authenticity and integrity of the copyright and works content of protecting video work is a problem demanding prompt solution.
The digital watermark of video is to be embedded in video media by pager, reached protect works copyright and
Prevent the effective ways that works are maliciously tampered.As effective means of supplementing out economy of conventional encryption methods, numeral
Watermark (digital watermarking) causes the great attention of people in recent years and is increasingly becoming multimedia letter
One study hotspot of number process field.
The present invention will propose a kind of method the most quickly hiding video watermark.
Summary of the invention
The embodiment of the present invention provides a kind of video watermark to hide insertion method and device, in order to solve existing skill
In art, copyright protection and the true integrity of video cannot the defects of the property taken into account, it is achieved that digital video encryption
Ensure that the picture quality of video simultaneously.
The embodiment of the present invention provides a kind of video watermark to hide insertion method, including:
According to the size of default watermark information matrix, pending frame of video is carried out adaptively piecemeal
Process, obtain video image blocks；
Described watermark information matrix is embedded in described video image blocks.
The embodiment of the present invention provides a kind of video watermark to hide insertion apparatus, including:
Image segmentation module, for the size according to the watermark information matrix preset, by pending video
Carry out piecemeal process frame adaptive, obtain video image blocks；
Watermark embedding module, for embedding described watermark information matrix in described video image blocks.
The video watermark that the embodiment of the present invention provides hides insertion method and device, by watermark information is embedding
The each image block entered to frame of video, ensure that the image of video while realizing digital video encryption
Quality.Meanwhile, the embodiment of the present invention by Statistics-Based Method extract video hide watermark from
And achieve the judgement of more accurate digital video copyright.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that under,
Accompanying drawing during face describes is some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the techniqueflow chart of the embodiment of the present invention one；
Fig. 2 is that embodiment of the present invention watermark arranges exemplary plot；
Fig. 3 a is that embodiment of the present invention image splits exemplary plot；
Fig. 3 b is that embodiment of the present invention image splits exemplary plot corresponding with watermark information matrix；
Fig. 4 is the techniqueflow chart of the embodiment of the present invention two；
Fig. 5 is the apparatus structure schematic diagram of the embodiment of the present invention three.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
Embodiment one
Fig. 1 is the techniqueflow chart of the embodiment of the present invention one, in conjunction with Fig. 1, embodiment of the present invention one video
Insertion method is hidden in watermark, mainly includes two big steps:
Step 110: according to the size of default watermark information matrix, by pending frame of video adaptively
Carry out piecemeal process, obtain video image blocks；
In the embodiment of the present invention, according to watermark information to be encrypted, pre-set watermark information matrix.Watermark
Information matrix, according to described default watermark style, forms with watermark element 1 and watermark element 0, wherein,
Described watermark element 1 represents 255 grades of gray values (white), and described watermark element 0 represents 0 grade of gray scale
Value (black).Example as shown in Figure 2, needing the watermark embedded is " LETV ", according to 0 and 1
Arrangement, can obtain character " LETV ".
Comprise add confidential information watermark information matrix tool have the dimensions, described size refers specifically to watermark matrix
Line number and columns, as in figure 2 it is shown, watermark information matrix corresponding to " LETV " is 19 × 5.
The embodiment of the present invention takes the mode of image block, by the frame of video of each process to be encrypted according to watermark
The sized divisions of information is several video image blocks, is all inserted into a bag in each video image blocks
Matrix watermark element with watermarked information.Concrete piecemeal is embodied as, by current video frame according to watermark information
The wide height of frame of video is divided into corresponding block by the ranks ratio of matrix, the coordinate of each image block respectively with
One watermark element of watermark information matrix is corresponding such that it is able to ensure that watermark information is intactly embedded into
In each frame video pictures.Accept above-mentioned example, if watermark " LETV " is embedded in video, Fig. 3 a
It show, be corresponding figure by pending frame of video according to the sized divisions of watermark information matrix 19 × 5
As block；Fig. 3 b show, according to the distribution of watermark element in watermark information matrix, by each image block
Coordinate is corresponding with watermark information matrix watermark element respectively.
Step 120: described watermark information matrix is embedded in described video image blocks.
Each image block obtained for segmentation, performs to embed the operation of watermark, respectively by watermark information
Matrix is embedded in described video image blocks, actually pixel value original in frame of video is superimposed with water
Print information strength.Owing to the watermark information intensity of superposition should be less than visual system (HSV) contrast of human eye
Degree thresholding, does not so impact the viewing effect that video is overall.Therefore, the embodiment of the present invention is adopted
The watermark embedded mode taken is to carry out faint watermark letter on the binary number lowest order that original pixel value is corresponding
The superposition of breath, while realizing watermark embedding, it is ensured that the viewing quality that video is good.
Step 120 is realized by step 121～step 122 further, and details are as follows:
Step 121: described video image blocks carries out rim detection, obtains the pixel comprising marginal information
Set；
Edge refers to the set of pixel grey scale pixel jumpy in image, and it is the feature that image is most basic.
Owing to the marginal portion fluctuation of pixel values of image is bigger, the change to gray scale is insensitive, even if having faint
Watermark pixel value superposition, there is no significant change at human eye, therefore, in the embodiment of the present invention,
Before watermark embeds, in advance each image block is carried out rim detection, obtain comprising the pixel of marginal information
The set of point.
The algorithm of rim detection is a lot, and single order edge detection algorithm has: Roberts Cross operator, Prewitt
Operator, Sobel operator, Kirsch operator, compass operator；Two terrace edge detection algorithms have: Marr-Hildreth,
At the second dervative zero crossing of gradient direction, Canny operator, Laplacian operator.
For the algorithms of different of the rim detection of image, its basic step mainly includes following four steps:
A. filter.Rim detection is based primarily upon derivative calculations, but affected by noise.But wave filter is made an uproar in reduction
Also the loss of edge strength is caused while sound.
B. strengthen.The point that gray scale in neighborhood is had significant change by enhancing algorithm highlights.General by calculating
Gradient magnitude completes.
C. detect.But what in some image, gradient magnitude was bigger is not marginal point.Simplest edge is examined
Survey is gradient magnitude threshold determination.
D. position.Accurately determine the position at edge.
It should be noted which kind of edge detection algorithm is the embodiment of the present invention be not limiting as using, any can
Realize the algorithm of embodiment of the present invention rim detection all within the protection domain of the embodiment of the present invention.
After completing rim detection, each image block is divided into two set, only comprises the collection of edge pixel point
Close A and the set B comprising non-edge pixels point.
Step 122: according to watermark element and the coordinate of described video image blocks of described watermark information matrix
Between corresponding relation, described watermark information is embedded in described pixel set.
If the watermark element 1 of the corresponding described watermark information matrix of the coordinate of described image block, then with 254 and institute
State each pixel in pixel set and carry out step-by-step logical AND operation, described watermark element 1 is embedded
To described pixel set；
Metric 254 corresponding binary ones 111 1110, carry out logic and operation therewith with pixel value,
The result of practical operation is forcibly by the extreme lower position 0 of binary number corresponding for pixel value, is converted into ten
After system, if original pixel value is odd number, then the result of logic and operation is equivalent to original pixel value and subtracts 1；If
Original pixel value is even number, then the result of logic and operation is without impact on original pixel value.
Such as, if in a certain image block of frame of video, the pixel value of edge pixel point is 65 (corresponding preimages
Element value is odd number situation), corresponding binary system is 0,100 0001, after 1,111 1110 step-by-step logical ANDs,
Obtaining 0,100 0000, corresponding binary value is 64；If it is (corresponding former that the pixel value of edge pixel point is 64
Pixel value is even number situation), corresponding binary system is 0,100 0000, with 1,111 1110 step-by-step logical ANDs
After, obtaining 0,100 0000, corresponding binary value is 64, and result is the most unchanged.To described pixel point set
In conjunction and each edge pixel point is performed both by the step-by-step logical AND operation of above-mentioned watermark element 1, just realizes
Watermark information 1 is embedded in the image block of correspondence.
Separately, if the watermark element 0 of the corresponding described watermark information matrix of the coordinate of described image block, then with 1 with
Each pixel in described pixel set carries out step-by-step logic or operation, by embedding for described watermark element 0
Enter to described pixel set.
Metric 1 corresponding binary zero 000 0001, carries out logic or computing therewith with pixel value, real
The result of border operation is forcibly by the extreme lower position 1 of binary number corresponding for pixel value, is converted into ten and enters
System, if original pixel value is odd number, then the result of logic or computing on original pixel value without impact；If preimage is plain
Value is for even number, then the result of logic or computing is equivalent to original pixel value and adds 1.Such as, if certain of frame of video
In one image block, the pixel value of edge pixel point is 65 (corresponding original pixel value is odd number situation), corresponding
Binary system be 0,100 0001, with 0,000 0001 step-by-step logics or after, obtain 0,100 0001, corresponding
Binary value is 65, and result is unchanged；If the pixel value to edge pixel is 64 (corresponding original pixel values
For even number situation), corresponding binary system is 0,100 0000, after carrying out logic or computing with 0,000 0001
Obtaining 0,100 0001, corresponding binary system is 65.In described pixel set and each edge pixel point
Be performed both by step-by-step logic or the operation of above-mentioned watermark element 1, just achieve watermark information 0 is embedded in right
The image block answered.
The process that above-mentioned watermark embeds is as follows by logical operations formulae express:
Wherein, A (i) is the set comprising edge pixel point, and i is the sequence number of pixel.& is logical AND behaviour
Make, | for logic or operation.
In the present embodiment, according to default watermark style, watermark element 1 and watermark element 0 is used to form
Watermark information matrix, if watermark style needs amendment, the most only need to change watermark element 1 and watermark element 0
Quantity and arrangement mode, the easiest easy execution；Meanwhile, in the present embodiment, by be encrypted
Video is split according to the size of watermark matrix, and is embedded in by watermark information in each image block,
Watermark display on picture is concealed while realizing watermark encrypting integrity, thus after ensure that process
The display quality of image, has taken into account video protection and Consumer's Experience.
Embodiment two
Fig. 4 is the techniqueflow chart of the embodiment of the present invention two, in conjunction with Fig. 4, sends out for described in detail below
Bright embodiment watermark extraction step realize process.
Step 410: according to default piecemeal principle, the division that pending frame of video carries out image block obtains
A number of image block；
It should be noted that the piecemeal as the watermark insertion in the embodiment of the present invention is followed with watermark extracting is former
Then, this piecemeal principle is determined by the quantity of watermark matrix element.
Step 420: described image block carries out rim detection, obtains the pixel set comprising marginal information；
With the step 121 of embodiment one, do not repeat.
Step 430: add up in described pixel set, pixel value be the pixel of odd number number a and
Pixel value is number b of the pixel of even number；
Watermark extraction step in the present embodiment and the watermark inserting step of embodiment one are approximately reciprocal mistake
Journey, is learnt by embodiment one, if a certain image block being inserted watermark information 1, then for this image
In block, pixel value is the pixel of odd number, and its value subtracts 1 after superposition watermark information 1 and becomes even number, and
Pixel value is the pixel of even number, and its value is still even number；If a certain image block is inserted watermark information 0,
Being then the pixel of even number for pixel value in this image block, its value increases after superposition watermark information 0
Adding 1, become odd number, and pixel value is the pixel of odd number, its value is still odd number；That is, insert water
In the image block of official seal breath 1, its edge pixel values is that the pixel of even number is in the majority, and inserts watermark information
In the image block of 0, its edge pixel values is that the pixel of odd number is in the majority.Therefore, by a certain image
In the edge pixel point of block, pixel value is the number number institute with the point that pixel value is odd number of the point of even number
The statistical property embodied, just can judge that described image block is superimposed watermark information 1 or watermark information 0.
Step 440: as a > b time, remember watermark element 0 in described image block quantity increase by 1, otherwise remember
In described image block, the quantity of watermark element 1 increases by 1；
When in the pixel value of the edge pixel point of a certain image block, when the number of odd number is more than even number, this
Image block has very likely been embedded into watermark information 0, otherwise, when the number of even number is more than radix, this
One image block has very likely been embedded into watermark information 1.But, only can not be accurate by an image block
Really judge to be embedded into the kind of watermark information, in the embodiment of the present invention, perform step 150 further and carry out
Judge more accurately.
Step 450: add up the described water that in each frame of video, the described image block at co-located place is corresponding
The quantity of print element 1 and the quantity of described watermark element 0, if the quantity of described watermark element 1 is more than
The quantity of described watermark element 0, then judge the watermark element 1 of described image block correspondence watermark matrix, no
Then, it is determined that the watermark element 0 of the corresponding described watermark matrix of described image block, thus according to described image block
The watermark element of coordinate and corresponding described watermark matrix obtain the watermark hidden in video.
This step embeds the position repeatability of watermark based on each frame of video, adds up and is positioned in each frame of video together
One position the quantity of described watermark element 1 corresponding to described image block and described watermark element 0
Quantity, carry out cumulative statistics through all frame of video, reduce the probability of watermark information erroneous judgement.
In the present embodiment, utilize the inverse process inserting watermark, and the method being taken based on statistics extracts video
The watermark hidden, it is judged that whether video is pirate video, it is achieved thereby that the protection of digital video copyright.
Embodiment three
Fig. 5 is the apparatus structure schematic diagram of the embodiment of the present invention three, in conjunction with Fig. 5, and one video water of the present invention
Print hide insertion apparatus, mainly include such as lower module: image segmentation module 510, watermark embedding module 520,
Watermark arranges module 530, watermark extracting module 540.
Described image segmentation module 510, for the size according to the watermark information matrix preset, by pending
Frame of video carry out piecemeal process adaptively, obtain video image blocks；
Described watermark embedding module 520, for embedding described watermark information matrix in described video image blocks.
Described device farther includes watermark and arranges module 530, and described watermark arranges module 530 for root
According to default watermark style, form described watermark information matrix with watermark element 1 and watermark element 0, its
In, described watermark element 1 represents that 255 grades of gray values, described watermark element 0 represent 0 grade of gray value.
Further, described watermark embedding module 520 is further used for: described video image blocks is carried out limit
Edge detects, and obtains the pixel set comprising marginal information；Watermark unit according to described watermark information matrix
Corresponding relation between the plain and coordinate of described video image blocks, is embedded in described by described watermark information
Pixel set.
Further, described watermark embedding module 520 is further used for: if the coordinate of described image block is corresponding
The watermark element 1 of described watermark information matrix, then with each pixel in 254 and described pixel set
Point carries out step-by-step logical AND operation, and described watermark element 1 is embedded in described pixel set；
If the watermark element 0 of the corresponding described watermark information matrix of the coordinate of described image block, then with 1 with described
Each pixel in pixel set carries out step-by-step logic or operation, is embedded in by described watermark element 0
Described pixel set.
Described device farther includes watermark extracting module 540, and described watermark extracting module 540 is used for: press
According to default piecemeal principle, the division that pending frame of video carries out image block obtains a number of image
Block；Described image block is carried out rim detection, obtains the pixel set comprising marginal information；Statistics institute
Stating in pixel set, pixel value is number a of the pixel of odd number and pixel value is the pixel of even number
Number b of point；As a > b time, remember watermark element 0 in described image block quantity increase by 1, otherwise remember institute
The quantity stating watermark element 1 in image block increases by 1；Add up co-located place in each frame of video
The quantity of the described watermark element 1 that described image block is corresponding and the quantity of described watermark element 0, if institute
State the quantity quantity more than described watermark element 0 of watermark element 1, then judge described image block correspondence water
The watermark element 1 of print matrix, otherwise, it is determined that the watermark element 0 of the corresponding described watermark matrix of described image block,
Thus obtain in video hidden according to the coordinate of described image block with the watermark element of corresponding described watermark matrix
The watermark hidden.
Fig. 5 shown device can perform the method for Fig. 1 and embodiment illustrated in fig. 2, it is achieved principle and technology
Effect, with reference to Fig. 1 and embodiment illustrated in fig. 2, repeats no more.
Device embodiment described above is only schematically, wherein said illustrates as separating component
Unit can be or may not be physically separate, the parts shown as unit can be or
Person may not be physical location, i.e. may be located at a place, or can also be distributed to multiple network
On unit.Some or all of module therein can be selected according to the actual needs to realize the present embodiment
The purpose of scheme.Those of ordinary skill in the art are not in the case of paying performing creative labour, the most permissible
Understand and implement.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive each reality
The mode of executing can add the mode of required general hardware platform by software and realize, naturally it is also possible to by firmly
Part.Based on such understanding, the portion that prior art is contributed by technique scheme the most in other words
Dividing and can embody with the form of software product, this computer software product can be stored in computer can
Read in storage medium, such as ROM/RAM, magnetic disc, CD etc., including some instructions with so that one
Computer installation (can be personal computer, server, or network equipment etc.) performs each to be implemented
The method described in some part of example or embodiment.
Last it is noted that above example is only in order to illustrate technical scheme, rather than to it
Limit；Although the present invention being described in detail with reference to previous embodiment, the ordinary skill of this area
Personnel it is understood that the technical scheme described in foregoing embodiments still can be modified by it, or
Person carries out equivalent to wherein portion of techniques feature；And these amendments or replacement, do not make corresponding skill
The essence of art scheme departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a video watermark hides insertion method, it is characterised in that comprise the steps:
According to the size of default watermark information matrix, pending frame of video is carried out at piecemeal adaptively
Reason, obtains video image blocks；
Described watermark information matrix is embedded in described video image blocks.
Method the most according to claim 1, it is characterised in that preset watermark information matrix, enter one
Step includes:
According to default watermark style, form described watermark information matrix with watermark element 1 and watermark element 0,
Wherein, described watermark element 1 represents that 255 grades of gray values, described watermark element 0 represent 0 grade of gray value.
Method the most according to claim 1, it is characterised in that described video image blocks is embedded water
Print, farther includes:
Described video image blocks is carried out rim detection, obtains the pixel set comprising marginal information；
Corresponding between watermark element according to described watermark information matrix and the coordinate of described video image blocks
Relation, described watermark information is embedded in described pixel set.
The most according to the method in claim 2 or 3, it is characterised in that described watermark information is embedded
To described pixel set, farther include:
If the watermark element 1 of the corresponding described watermark information matrix of the coordinate of described image block, then with 254 and institute
State each pixel in pixel set and carry out step-by-step logical AND operation, described watermark element 1 is embedded
To described pixel set；
If the watermark element 0 of the corresponding described watermark information matrix of the coordinate of described image block, then with 1 with described
Each pixel in pixel set carries out step-by-step logic or operation, is embedded in by described watermark element 0
Described pixel set.
Method the most according to claim 1, it is characterised in that described method farther includes, and adopts
Watermark with hiding in steps extraction video:
According to default piecemeal principle, the division that pending frame of video carries out image block obtains a number of
Image block；
Described image block is carried out rim detection, obtains the pixel set comprising marginal information；
Adding up in described pixel set, pixel value is that number a of the pixel of odd number and pixel value are for even
Number b of the pixel of number；
As a > b time, remember watermark element 0 in described image block quantity increase by 1, otherwise remember described image block
The quantity of middle watermark element 1 increases by 1；
Add up the described watermark element 1 that in each frame of video, the described image block at co-located place is corresponding
Quantity and the quantity of described watermark element 0, if the quantity of described watermark element 1 is more than described watermark
The quantity of element 0, then judge the watermark element 1 of described image block correspondence watermark matrix, otherwise, it is determined that
The watermark element 0 of the corresponding described watermark matrix of described image block, thus according to the coordinate of described image block with
The watermark element of corresponding described watermark matrix obtains the watermark hidden in video.
6. a video watermark hides insertion apparatus, it is characterised in that include such as lower module:
Image segmentation module, for the size according to the watermark information matrix preset, by pending frame of video
Carry out piecemeal process adaptively, obtain video image blocks；
Watermark embedding module, for embedding described watermark information matrix in described video image blocks.
Device the most according to claim 6, it is characterised in that described device farther includes watermark
Module is set, described watermark arrange module for:
According to default watermark style, form described watermark information matrix with watermark element 1 and watermark element 0,
Wherein, described watermark element 1 represents that 255 grades of gray values, described watermark element 0 represent 0 grade of gray value.
Device the most according to claim 6, it is characterised in that described watermark embedding module is further
For:
Described video image blocks is carried out rim detection, obtains the pixel set comprising marginal information；
Corresponding between watermark element according to described watermark information matrix and the coordinate of described video image blocks
Relation, described watermark information is embedded in described pixel set.
9. according to the device described in claim 7 or 8, it is characterised in that described watermark embedding module enters
One step is used for:
If the watermark element 1 of the corresponding described watermark information matrix of the coordinate of described image block, then with 254 and institute
State each pixel in pixel set and carry out step-by-step logical AND operation, described watermark element 1 is embedded
To described pixel set；
If the watermark element 0 of the corresponding described watermark information matrix of the coordinate of described image block, then with 1 with described
Each pixel in pixel set carries out step-by-step logic or operation, is embedded in by described watermark element 0
Described pixel set.
Device the most according to claim 6, it is characterised in that described device farther includes watermark
Extraction module, described watermark extracting module is used for:
According to default piecemeal principle, the division that pending frame of video carries out image block obtains a number of
Image block；
Described image block is carried out rim detection, obtains the pixel set comprising marginal information；
Adding up in described pixel set, pixel value is that number a of the pixel of odd number and pixel value are for even
Number b of the pixel of number；
As a > b time, remember watermark element 0 in described image block quantity increase by 1, otherwise remember described image block
The quantity of middle watermark element 1 increases by 1；
Add up the described watermark element 1 that in each frame of video, the described image block at co-located place is corresponding
Quantity and the quantity of described watermark element 0, if the quantity of described watermark element 1 is more than described watermark
The quantity of element 0, then judge the watermark element 1 of described image block correspondence watermark matrix, otherwise, it is determined that
The watermark element 0 of the corresponding described watermark matrix of described image block, thus according to the coordinate of described image block with
The watermark element of corresponding described watermark matrix obtains the watermark hidden in video.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107801027A (en) * | 2017-10-19 | 2018-03-13 | 西安万像电子科技有限公司 | Image processing method, apparatus and system |
| CN111065000A (en) * | 2018-10-16 | 2020-04-24 | 李赵红 | Video watermark processing method, device and storage medium |
| CN111193936A (en) * | 2019-12-27 | 2020-05-22 | 腾讯科技（深圳）有限公司 | Video streaming transmission method and device, electronic equipment and computer readable storage medium |
| CN111353133A (en) * | 2018-12-24 | 2020-06-30 | 杭州海康威视系统技术有限公司 | Image processing method, device and readable storage medium |
| CN114422651A (en) * | 2022-01-11 | 2022-04-29 | 北京邮电大学 | Image information hiding method, tracing method, hiding device and tracing device |
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