CN103037268B - Method and device for watermark adding - Google Patents
Method and device for watermark adding Download PDFInfo
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- CN103037268B CN103037268B CN201210528223.6A CN201210528223A CN103037268B CN 103037268 B CN103037268 B CN 103037268B CN 201210528223 A CN201210528223 A CN 201210528223A CN 103037268 B CN103037268 B CN 103037268B
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Abstract
The invention provides a method for watermark adding. The method for watermark adding includes the steps that a first area for adding watermark is arranged in a same position of a video image in each frame, in the first area when an absolute value of a difference between a pixel value of a watermark image and that of the video image in each frame is greater than or equal to a presupposed pixel value, the pixel of the watermark image is displayed, and when the absolute value is less than the presupposed pixel value, the pixel of the video image in each frame is displayed. The invention provides a device for watermark adding. The device for watermark adding is good in anti-theft function, little in amount of calculation of watermark adding process, high in efficiency, and small in the occupied image area.
Description
Technical field
The present invention relates to image processing field, particularly relate to a kind of watermark adding method and device.
Background technology
The adding method of current video watermark is of a great variety, but all there is certain deficiency.Some interpolation water mark methods add complete watermark by fixed position, easily directly detained and go or simply replace with color lump; In the color consecutive image region maximum by the size of each two field picture watermarking images being added to video file had, avoid the shortcoming of a kind of front method, anti-theft effect is better, but because the watermarking images of the method is almost all different in the position of each two field picture, and the maximum color consecutive image region of the size of each two field picture may be the important information region of image, the area taking video image is large, and the method directly can have influence on the appreciation effect of video.
Therefore, a kind of anti-theft feature watermark adding method that is good, that do not affect the overall appreciation effect of video is proposed real in necessary.
Summary of the invention
The object of the invention is to propose a kind of watermark adding method and device, anti-theft feature is good, watermark adding procedure operand is little, efficiency is high; The area taking image is little.
The scheme adopted is:
A kind of watermark adding method, comprises step:
The first area of adding watermark is set in the same position of each frame video image;
In described first area, when the absolute value of the difference of the pixel value of video image is greater than or equal to default pixel value described in the pixel value of watermarking images and each frame, show the pixel of described watermarking images; When described absolute value is less than described default pixel value, show the pixel of video image described in each frame.
And a kind of watermark adding set, comprising:
Setting unit, for arranging the first area of adding watermark in the same position of each frame video image;
Pixel processing unit, in described first area, when the absolute value of the difference of the pixel value of video image is greater than or equal to default pixel value described in the pixel value of watermarking images and each frame, shows the pixel of described watermarking images; When described absolute value is less than described default pixel value, show the pixel of video image described in each frame.
The present invention by watermarking images and video image poor, then the absolute value of difference is made comparisons with the pixel value preset, carry out the mode selecting display, it is irregular image that watermarking images is shown in video image, and the shape shown in every frame video image is nearly all not identical, therefore has good anti-theft effect; The area taking video image is less, adds the position of watermark and fixes, and the position of watermarking images can not be caused to differ and cause and too beat, can not affect overall appreciation effect; And the signed magnitude arithmetic(al) of pixel difference is only for the region of adding watermarking images, therefore, operand is little, and it is high that efficiency compares conventional method.
Accompanying drawing explanation
Fig. 1 is an embodiment flow chart of the inventive method;
Fig. 2 A arranges the schematic diagram of first area at a wherein two field picture of video image;
Fig. 2 B is a wherein two field picture schematic diagram of the video image after setting up first area;
Fig. 2 C is one of them schematic diagram of the watermark that need add;
Fig. 2 D be carry out pixel relatively after watermark schematic diagram;
Fig. 2 E is a wherein two field picture schematic diagram of the video image after adding watermark;
Fig. 2 F be carry out pixel relatively after another schematic diagram of watermark;
Fig. 2 G is another two field picture schematic diagram of the video image after adding watermark;
Fig. 2 H is a wherein two field picture schematic diagram of the video image after setting up second area;
Fig. 2 I is a wherein two field picture schematic diagram of the video image after adding another image tagged;
Fig. 3 is a structural representation of apparatus of the present invention;
Fig. 4 is another structural representation of apparatus of the present invention.
Embodiment
For ease of understanding, be described below in conjunction with accompanying drawing.
The present invention proposes a kind of watermark adding method, and idiographic flow with reference to figure 1, can comprise step:
S1, arrange in the same position of each frame video image and add the first area of watermark;
Concrete, first area can be set in any one corner regions in each frame video image 4 corners; As shown in Figure 2 A, 4 corners that can be 1,2,3,4 at the label of each frame video image arrange first area, such as, arrange first area in the lower left corner of all video frame images, please refer to Fig. 2 B.When first area is set, can arrange according to the size of the watermark that will add; Total principle can hold watermark entirety completely in the first region.
S2, in the first region, when the absolute value of the difference of the pixel value of watermarking images and the pixel value of each frame video image is greater than or equal to default pixel value, the pixel of display watermarking images;
S3, in the first region, when absolute value is less than default pixel value, show the pixel of each frame video image.
Concrete, watermark added in the first region, like this, watermarking images will cover a part of each frame video image, and each point on watermarking images forms corresponding relation with each point on capped video image; Compared by the pixel value of the pixel value of each point watermarking images and the video image of corresponding points, the pixel obtaining each point watermarking images and video image is poor; When the absolute value of this pixel difference is greater than or equal to default pixel value, the pixel of display watermarking images; When this absolute value is less than default pixel value, show the pixel of each frame video image.
Wherein, the pixel value preset can be arranged according to actual conditions.By the step that the pixel value of the pixel value of each point watermarking images and the video image of corresponding points compares, can be before watermark is added in first area, the position that watermark is placed in first area is set, obtain each point pixel value of watermarking images, and the video image obtained in first area places each point pixel value of watermark location; In each corresponding points, the pixel value of watermarking images is deducted the pixel value of video image, thus obtain the absolute value of each point pixel difference.
The present invention by watermarking images and video image poor, then the absolute value of difference is made comparisons with the pixel value preset, carry out the mode selecting display, it is irregular image that watermarking images is shown in video image, and the shape shown in every frame video image is nearly all not identical, therefore has good anti-theft effect; The area taking video image is less, adds the position of watermark and fixes, and the position of watermarking images can not be caused to differ and cause and too beat, can not affect overall appreciation effect; And the signed magnitude arithmetic(al) of pixel difference is only for the region of adding watermarking images, therefore, operand is little, and it is high that efficiency compares conventional method.
In order to improve the anti-theft feature of video image further, can also do following improvement: the second area adding image tagged is set in the same position of the designated frame of video image; Wherein, second area and first area are not overlapping; Another image tagged is added at second area.
In a specific embodiment, second area can be arranged on the region in any one corner in each frame video image in four corners, such as: be arranged on side, first area; Or second area being arranged on other corners of each frame video image, such as: when arranging first area in 1 region, second area can being set in 2 regions; The size of adding another image tagged at second area can be less than the size of watermark, do not affect the visual effect of video image while can ensureing anti-theft effect like this;
Wherein, when designated frame arranges second area, can be in odd-numbered frame or even frame; Can also be other frames self-defined; The present invention is not limited.
With specific embodiment, the watermark adding method that the present invention proposes is described below;
Please refer to Fig. 2 C, is a watermark schematic diagram needing to add; Watermark is added on first area shown in Fig. 2 B; In the first region, through comparing the difference of the pixel value of watermarking images and the pixel value of current frame video image, the absolute value obtaining the difference of the wherein pixel value of a part of watermarking images and the pixel value of current frame video image is less than default pixel value, region as shown in the striped of Fig. 2 D; Then according to method of the present invention, region shown in the striped not showing Fig. 2 D in current frame video image, the effect after the video image of present frame adds watermark is as shown in Figure 2 E;
When adding watermark in the first area of another frame video image, in like manner, in the first region, through comparing the difference of the pixel value of watermarking images and the pixel value of current frame video image, the absolute value obtaining the difference of the wherein pixel value of a part of watermarking images and the pixel value of current frame video image is less than default pixel value, region as shown in the striped of Fig. 2 F; Then according to method of the present invention, region shown in the striped not showing Fig. 2 F in current frame video image, the effect after the video image of present frame adds watermark is as shown in Figure 2 G;
If the side, first area of the video image shown in Fig. 2 E arranges second area, refer to Fig. 2 H; Schematic diagram after this second area increases another image tagged, refers to Fig. 2 I.
The present invention also proposes a kind of watermark adding set, please refer to Fig. 3, comprising:
Setting unit, for arranging the first area of adding watermark in the same position of each frame video image;
Pixel processing unit, in the first region, when the absolute value of the difference of the pixel value of watermarking images and the pixel value of each frame video image is greater than or equal to default pixel value, the pixel of display watermarking images; When absolute value is less than default pixel value, show the pixel of each frame video image.
The present invention by watermarking images and video image poor, then the absolute value of difference is made comparisons with the pixel value preset, carry out the mode selecting display, it is irregular image that watermarking images is shown in video image, and the shape shown in every frame video image is nearly all not identical, therefore has good anti-theft effect; The area taking video image is less, adds the position of watermark and fixes, and the position of watermarking images can not be caused to differ and cause and too beat, can not affect overall appreciation effect; And the signed magnitude arithmetic(al) of pixel difference is only for the region of adding watermarking images, therefore, operand is little, and it is high that efficiency compares conventional method.
In order to the anti-theft effect of augmented video image, watermark adding set also comprises mark adding device, please refer to Fig. 4;
Wherein, setting unit is used in the same position of the designated frame of video image, arrange the second area adding image tagged; Wherein, second area and first area are not overlapping;
Mark adding device is used for adding another image tagged at second area.
Wherein in an execution mode, first area is the region in any one corner in each frame video image in four corners.Second area is the region in any one corner in each frame video image in four corners.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a watermark adding method, is characterized in that, comprises step:
The first area of adding watermark is set in the same position of each frame video image;
In described first area, when the absolute value of the difference of the pixel value of video image is greater than or equal to default pixel value described in the pixel value of watermarking images and each frame, show the pixel of described watermarking images; When described absolute value is less than described default pixel value, show the pixel of video image described in each frame.
2. watermark adding method according to claim 1, is characterized in that, arranges the second area adding image tagged in the same position of the designated frame of described video image; Wherein, described second area is not overlapping with described first area;
Another image tagged is added at described second area.
3. watermark adding method according to claim 1, is characterized in that, described first area is the region in any one corner in four corners in video image described in each frame.
4. watermark adding method according to claim 2, is characterized in that, described first area is the region in any one corner in four corners in video image described in each frame.
5. watermark adding method according to claim 4, is characterized in that, described second area is the region in any one corner in four corners in video image described in each frame.
6. a watermark adding set, is characterized in that, comprising:
Setting unit, for arranging the first area of adding watermark in the same position of each frame video image;
Pixel processing unit, in described first area, when the absolute value of the difference of the pixel value of video image is greater than or equal to default pixel value described in the pixel value of watermarking images and each frame, shows the pixel of described watermarking images; When described absolute value is less than described default pixel value, show the pixel of video image described in each frame.
7. watermark adding set according to claim 6, is characterized in that, described watermark adding set also comprises mark adding device;
Wherein, described setting unit is used in the same position of the designated frame of described video image, arrange the second area adding image tagged; Wherein, described second area is not overlapping with described first area;
Described mark adding device is used for adding another image tagged at described second area.
8. watermark adding set according to claim 6, is characterized in that, described first area is the region in any one corner in four corners in video image described in each frame.
9. watermark adding set according to claim 7, is characterized in that, described first area is the region in any one corner in four corners in video image described in each frame.
10. watermark adding set according to claim 9, is characterized in that, described second area is the region in any one corner in four corners in video image described in each frame.
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| CN201210528223.6A CN103037268B (en) | 2012-12-07 | 2012-12-07 | Method and device for watermark adding |
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| CN201210528223.6A CN103037268B (en) | 2012-12-07 | 2012-12-07 | Method and device for watermark adding |
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| CN103037268A CN103037268A (en) | 2013-04-10 |
| CN103037268B true CN103037268B (en) | 2015-07-08 |
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| CN108563929A (en) * | 2018-04-16 | 2018-09-21 | 深圳市联软科技股份有限公司 | It is a kind of only in the method for concerning security matters Area generation watermark, system, device and medium |
| CN110620961A (en) * | 2019-08-09 | 2019-12-27 | 上海紫竹数字创意港有限公司 | Video watermark adding method and device and video editing terminal |
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