CN1479516A - Method of pick-up and restoring information image water mark by frame - Google Patents
Method of pick-up and restoring information image water mark by frame Download PDFInfo
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- CN1479516A CN1479516A CNA031325130A CN03132513A CN1479516A CN 1479516 A CN1479516 A CN 1479516A CN A031325130 A CNA031325130 A CN A031325130A CN 03132513 A CN03132513 A CN 03132513A CN 1479516 A CN1479516 A CN 1479516A
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Abstract
The method for recovering image is (1) A frame is added to original image with watermark information. (2) The image having a frame and watermark information is processed. (3) The method for recovering image is as following: (3a) picking up the frame of the processed image; (3b) calculating varied geometric parameter of processed image frame; (3c) based on varied geometric parameter of processed image frame, the original image with watermark information is recovered; (3d) separating out watermark information from image; (3e) obtaining original image. The invention can recover clear image from image with watermark information with being processed by rotation, stretch and twist operations.
Description
Technical field: the present invention relates to a kind of method of image restoration, be specifically related to a kind of method that has watermark information image restoration.
Background technology: at present in image watermarked be used for image anti-piracy, anti-duplicate very general, but it is very low that the image that has watermark at present is able to take the ability of geometric format processing, the image that for example has watermark is rotated, stretches, distortion etc., be difficult to from image, extract original watermark information again through the image after these geometric formats processing, because original watermark information is destroyed.
Summary of the invention: the invention provides a kind of frame that utilizes and extract the method that recovery has the watermark information image, it can make image still can recover the reset condition of image through after the various processing, and separates out original watermark information more clearly.Adopt prerequisite of the present invention to be: 1, the original image that has watermark information to be added frame, 2, the image that has frame and a watermark information is processed, 3, the present invention to the method for image restoration is: 3-1, to extract the frame of processed back image; The geometric parameter that 3-2, the processed back of calculating framing mask change; 3-3, the geometric parameter that changes according to framing mask restore the original image that to have watermark information; 3-4, from image, separate out watermark information; 3-5, obtain original image.The present invention to the image that is embedded with frame in the original image processed after, at first extract frame, frame is restored processing, utilize recovery information then to frame, image itself is restored.The present invention can make the image that has watermark information be rotated, stretch, still can recover distinct image after the processing such as distortion, and can extract original watermark information more clearly from image.
Description of drawings: Fig. 1 is a flow chart of the present invention, and Fig. 2 is the flow chart of step 3-1 in the embodiment one, and Fig. 3 is the flow chart of step 3-3 in the embodiment one, and Fig. 4 is the flow chart of embodiment two.
Embodiment one: the flow process of present embodiment is: as shown in Figure 1,1, the original image that has watermark information is added frame, 2, it is processed to have an image of frame and watermark information, and 3, be: 3-1, extract the frame of processed back image to the flow process of image restoration; The geometric parameter that 3-2, the processed back of calculating framing mask change; 3-3, the geometric parameter that changes according to framing mask restore the original image that to have watermark information; 3-4, from image, separate out watermark information; 3-5, obtain original image.
The step of step 3-1 described " extracting the frame of processed back image " is: as shown in Figure 2,3-1-1, obtain the image after processed; 3-1-2, extract, follow the tracks of according to morphologic profile simultaneously according to morphologic profile; 3-1-3, the difference that contouring extracts and profile is followed the tracks of; 3-1-4, obtain the frame of image.
The step of step 3-3 described " geometric parameter that changes according to framing mask restores the original image that to have watermark information " is: as shown in Figure 3,3-3-1, obtain the geometric parameter that frame changes; 3-3-2, make the reference template that recovers original image according to the geometric parameter that changes; 3-3-3, carry out interpolation point search, carry out non-interpolation point search simultaneously; 3-3-4, carry out image standardization; 3-3-5, restore the original image that to have watermark information.
Embodiment two: present embodiment increases 1-1 in steps as shown in Figure 4 between step 1 and step 2, step 1-1 is: frame is carried out rim detection, denoising and deblurring.The step 1-1 that increases in this embodiment helps increasing the accuracy of frame data, makes it more specifically.After image was processed, it was easier to obtain data when recovering the frame data.
Claims (4)
1, utilizes frame to extract and restore the method that has the watermark information image, adopt prerequisite of the present invention to be: (1), the original image that has watermark information is added frame, (2), the image that has frame and a watermark information is processed, it is characterized in that (3), the present invention to the method for image restoration are: (3-1), extract the frame of processed back image; (3-2), calculate the geometric parameter that processed back framing mask changes; (3-3), the geometric parameter that changes according to framing mask restores the original image that to have watermark information; (3-4), from image, separate out watermark information; (3-5), obtain original image.
2, the method for utilizing frame extract to restore to have the watermark information image according to claim 1 is characterized in that the step of step (3-1) described " extracting the processed frame of image afterwards " is: (3-1-1), obtain the image after processed; (3-1-2), extract, follow the tracks of according to morphologic profile simultaneously according to morphologic profile; (3-1-3), the difference that contouring extracts and profile is followed the tracks of; (3-1-4), obtain the frame of image.
3, the method for utilizing frame extract to restore to have the watermark information image according to claim 1 is characterized in that the step of step (3-3) described " geometric parameter that changes according to framing mask restores the original image that to have watermark information " is: (3-3-1), obtain the geometric parameter that frame changes; (3-3-2), make the reference template that recovers original image according to the geometric parameter that changes; (3-3-3), carry out interpolation point search, carry out non-interpolation point search simultaneously; (3-3-4), carry out the image standardization; (3-3-5), restore the original image that to have watermark information.
4, the frame that utilizes according to claim 1 extracts the method that recovery has the watermark information image, it is characterized in that increasing (1-1) in steps between step (1) and step (2), step (1-1) is: frame is carried out rim detection, denoising and deblurring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031325130A CN1479516A (en) | 2003-07-18 | 2003-07-18 | Method of pick-up and restoring information image water mark by frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA031325130A CN1479516A (en) | 2003-07-18 | 2003-07-18 | Method of pick-up and restoring information image water mark by frame |
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| CN1479516A true CN1479516A (en) | 2004-03-03 |
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| CNA031325130A Pending CN1479516A (en) | 2003-07-18 | 2003-07-18 | Method of pick-up and restoring information image water mark by frame |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103327262A (en) * | 2013-06-19 | 2013-09-25 | 北京视博数字电视科技有限公司 | Video segmentation method and system |
| CN104361565A (en) * | 2014-12-05 | 2015-02-18 | 华东理工大学 | Method for automatically detecting and repairing content of scrawled digital images |
-
2003
- 2003-07-18 CN CNA031325130A patent/CN1479516A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103327262A (en) * | 2013-06-19 | 2013-09-25 | 北京视博数字电视科技有限公司 | Video segmentation method and system |
| CN103327262B (en) * | 2013-06-19 | 2016-08-10 | 北京视博数字电视科技有限公司 | A kind of method and system of Video segmentation |
| CN104361565A (en) * | 2014-12-05 | 2015-02-18 | 华东理工大学 | Method for automatically detecting and repairing content of scrawled digital images |
| CN104361565B (en) * | 2014-12-05 | 2018-10-23 | 华东理工大学 | A kind of content scrawling picture digital picture detection and restorative procedure automatically |
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