WO2021023085A1

WO2021023085A1 - Watermark adding method and apparatus, watermark recognition method and apparatus, and electronic device

Info

Publication number: WO2021023085A1
Application number: PCT/CN2020/105682
Authority: WO
Inventors: 赵明明; 刘立真; 谢文珍
Original assignee: 北京大米科技有限公司
Priority date: 2019-08-02
Filing date: 2020-07-30
Publication date: 2021-02-11
Also published as: CN110634095A; CN110634095B

Abstract

A watermark adding method and apparatus, a watermark recognition method and apparatus, and an electronic device. A first image is processed on the basis of a watermark to obtain a second image (S201); an original image is processed by using the second image so as to add the watermark into the original image (S202). Watermark information is added to the original image by means of the second image, and whether the image is tampered in a transmission process is determined by extracting and analyzing the watermark information carried by subsequent image information, so that the normal operation of each system in the network is ensured, and the security of the network is also ensured.

Description

Watermark adding method, watermark recognition method, device and electronic equipment

Technical field

The present invention relates to the field of image processing, in particular to a watermark adding method, a watermark recognition method, device and electronic equipment.

Background technique

The description of the background technology of the present invention belongs to the related technology related to the present invention. It is only used to illustrate and facilitate the understanding of the content of the present invention. It should not be understood that the applicant clearly believes or presumes that the applicant believes that the present invention was first filed Existing technology on the filing date.

Image can be defined as the reproduction of things on a certain medium. For example, pictures, movies, faxes, televisions and other media can enable people to obtain image information. The process of transmitting image information to other storage devices through the network is image transmission. With the rapid development of the Internet, more and more images need to be transmitted over the network.

Multiple images are usually stored in the system, and users need to exchange images with the system to achieve the purpose of promotion, learning, and communication. However, the pictures may be tampered with, which will affect the normal operation of the system.

Summary of the invention

In order to solve the problem that various systems in the network cannot operate normally due to the fact that images are often tampered and destroyed during transmission, embodiments of the present invention provide a watermark adding method, watermark recognition method, device, and electronic equipment, which at least partially solve the problem The above problem.

In the first aspect, an embodiment of the present invention provides a watermark adding method, including:

Processing the first image based on the watermark to obtain the second image;

The original image is processed by using the second image to add the watermark to the original image.

Further, the first image is generated based on image sub-regions of the original image.

Further, the using the second image to process the original image includes:

Adding the second image to the first area in the blank image to obtain an image bottom plate, and the position of the first area corresponds to the position of the image sub-area in the original image;

The image base and the original image are synthesized.

Further, the image sub-region is a high-frequency region.

Further, the processing the first image based on the watermark to obtain the second image includes:

Adding the watermark to the first image to obtain a third image;

Stitching the first image and the third image to obtain the second image.

Further, the watermark is generated based on configuration information, and the configuration information includes at least one of the following: content information of the original image, service information, and user information.

In the second aspect, an embodiment of the present invention provides a watermark recognition method, including:

Acquiring an image to be recognized, wherein the image to be recognized is generated by processing an original image based on a second image, and the second image is obtained by processing the first image based on a watermark;

Identifying the watermark in the image to be identified;

Based on the watermark, it is determined whether the image to be recognized is a tampered image.

Further, the second image is obtained by processing the first image based on the watermark, including:

Adding the watermark to the first image to obtain a third image;

Stitching the first image and the third image to obtain the second image.

Further, the identifying the watermark in the image to be identified includes: extracting the first image and a third image, and comparing the first image and the third image to identify the watermark.

Further, the image to be recognized is generated by processing the original image based on the second image, including:

Adding the second image to the first area in the blank image to obtain an image base plate;

The image base and the original image are synthesized.

Further, the extracting the first image and the third image includes:

Determining a sub-region corresponding to the position of the first region in the image to be recognized;

The first image and the third image are extracted from the sub-region.

In the third aspect, an embodiment of the present invention provides a watermark adding device, including:

An obtaining unit, configured to process the first image based on the watermark to obtain the second image;

The adding unit is configured to use the second image to process the original image to add the watermark to the original image.

In a fourth aspect, an embodiment of the present invention provides a watermark recognition device, including:

An acquiring unit, configured to acquire an image to be identified, wherein the image to be identified is generated by processing an original image based on a second image, and the second image is obtained by processing the first image based on a watermark;

An identification unit for identifying the watermark in the image to be identified;

The determining unit is configured to determine whether the image to be recognized is a tampered image based on the watermark.

In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the steps of any one of the above methods are implemented.

In a sixth aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and capable of running on the processor. The processor implements any of the above items when the program is executed. Method steps.

The watermark adding method, watermark recognition method, device and electronic equipment provided by the present invention process a first image based on the watermark to obtain a second image; use the second image to process the original image to add the watermark to The original image. . In the present invention, the watermark information is added to the original image through the second image, and the watermark information carried in the subsequent image can be extracted and analyzed to determine whether the image has been tampered with during transmission. Once the image is tampered with, the image can be discarded and corresponding security investigations can be carried out. While ensuring the normal operation of various systems in the network, it also guarantees the security of the network.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a schematic diagram of an exemplary system architecture in which the watermark adding method, watermark identification method and device of the embodiments of the present application can be applied;

Fig. 2 is a schematic flowchart of a watermark adding method provided by an embodiment of the present invention;

Figure 3 is a schematic flowchart of another watermark adding method provided by an embodiment of the present invention;

Fig. 4 is a schematic flowchart of another watermark adding method provided by an embodiment of the present invention;

FIG. 5 is a schematic flowchart of another watermark adding method provided by an embodiment of the present invention;

Fig. 6 is a schematic flowchart of a watermark recognition method provided by an embodiment of the present invention;

Figure 7 is a schematic flowchart of another watermark identification method provided by an embodiment of the present invention;

Fig. 8A is a schematic diagram of an original image provided by an embodiment of the present invention;

8B is a schematic diagram of an image template containing watermark information provided by an embodiment of the present invention;

FIG. 8C is a schematic diagram of an image processed by the watermark adding method shown in FIG. 3 according to an embodiment of the present invention;

Figure 9 is a schematic structural diagram of a watermark adding device provided by an embodiment of the present invention;

Figure 10 is a schematic structural diagram of another watermark recognition device provided by an embodiment of the present invention;

Fig. 11 is a schematic structural diagram of an electronic device related to an embodiment of the present invention.

detailed description

The application will be further introduced below in conjunction with the drawings and embodiments.

In the following introduction, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The following description provides multiple embodiments of the present invention, and different embodiments can be substituted or combined. Therefore, this application may also be considered to include all possible combinations of the same and/or different embodiments described. Therefore, if one embodiment includes features A, B, C, and another embodiment includes features B, D, then this application should also be considered as including all other possible combinations of one or more of A, B, C, and D Although the embodiment may not be clearly written in the following content.

The following description provides examples, and does not limit the scope, applicability, or examples set forth in the claims. Changes can be made to the function and arrangement of the described elements without departing from the scope of the content of this application. Various procedures or components may be omitted, substituted, or added in various examples as appropriate. For example, the described method may be executed in a different order from the described order, and various steps may be added, omitted, or combined. In addition, features described with respect to some examples can be combined into other examples.

Fig. 1 shows a schematic diagram of an exemplary system architecture 100 to which the watermark adding method, watermark identification method and device of the embodiments of the present application can be applied.

As shown in FIG. 1, the system architecture 100 may include one or more of

communication devices

101, 102, and 103, a network 104 and a server 105. The network 104 is used to provide a medium for communication links between the

terminal devices

101, 102, 103 and the server 105. The network 104 may include various connection types, such as wired, wireless communication links, or fiber optic cables. It should be understood that the numbers of communication devices, networks, and servers in FIG. 1 are merely illustrative. According to implementation needs, there can be any number of communication devices, networks and servers. For example, the server 105 may be a server cluster composed of multiple servers.

The

communication devices

101, 102, 103 can be used to interact with the server 105 through the network 104 to receive or send messages, and so on. The

communication devices

101, 102, 103 may be various electronic devices with display screens, including but not limited to smart phones, tablet computers, portable computers, desktop computers, and so on. The

communication devices

101, 102, 103 may also be servers. The systems running on the

communication devices

101, 102, 103 need to transmit image files to and from the system running on the server 105.

The server 105 processes the first image based on the watermark to obtain the second image; uses the second image to process the original image to add the watermark to the original image. The server 105 sends images carrying watermark information to the

communication devices

101, 102, 103 via the network 104; and accepts the images to be recognized returned by the

communication devices

101, 102, 103; obtains the watermark information in the images to be recognized; The watermark information determines whether the image to be identified is a tampered image.

Referring to Figure 2, Figure 2 is a schematic flow chart of a watermark adding method provided by an embodiment of the present invention. The schematic flow chart is based on the network architecture of Figure 1. In the embodiment of the present invention, the method includes:

S201: Process the first image based on the watermark to obtain a second image.

Watermark is digital information added to image files. By adding watermark information to the image file, it can identify whether the file has been tampered with. Watermark information can include image information, sequence information, barcodes, two-dimensional codes, etc., or a combination of image information, sequence information, barcodes, and two-dimensional codes. Among them, the sequence information can be text information, digital information or a combination. The specific watermark information can be set according to specific needs.

Optionally, the watermark is generated based on configuration information, and the configuration information includes at least one of the following: content information of the original image, service information, and user information.

The content information of the original image may include image ID, attribution system, image description, and so on. The business information is the business system information applied to the original image. Business information may include: business ID, business name, business nature, business description, etc. The image after adding the watermark information may need to be sent to the corresponding user, and the corresponding user information is the above-mentioned user information. User information may include: user name, name, age, gender, hometown, level, etc.

For example, if a job search system and a user whose user name is A need to transfer pictures to each other, the watermark information added to the picture can be "Ain Job" and so on. Further, the user can also customize the user's watermark information to better meet the personalized needs of different users.

Using the content information, service information, and user information of the original image to generate the corresponding watermark information, compared to generating unified watermark information for all users, it can generate a variety of watermark information based on the content information, service information, and user information of the original image, reducing The watermark information of a certain user is leaked, so that the watermark information of all users in the system will be leaked, so as to more effectively guarantee the safety of the system operation.

Further, the configuration information also includes display parameters. The display parameters are the display position, font, line spacing, etc. of the watermark in the second image. This can better cater to the different needs of different users and improve user experience.

S202. Use the second image to process the original image to add the watermark to the original image.

Since the second image contains watermark information, when the original image is processed using the second image, the watermark information can be added to the original image. The subsequent watermark recognition program can extract the watermark information, and use the watermark information to determine whether the image has been tampered with during transmission.

Optionally, the first image is generated based on image sub-regions of the original image.

The aforementioned image sub-region may be a sub-image in a certain region of the original image. The first image may be the aforementioned image sub-region. The first image may also be an image generated by performing image processing on the above-mentioned image sub-regions, and the image processing includes: image gradation processing, image binarization processing, and the like.

In addition, the above-mentioned first image may also be a set image template.

Optionally, said using the second image to process the original image includes:

The image base and the original image are synthesized.

The image processed by the blank image will not change, that is, the original image is processed through the blank image, and the processed image is still the original image. Blank image can be set according to needs and image information. For example, if the blank image is a 24-bit image represented in RGB format, each pixel value of the blank image can be set to (0, 0, 0), and the blank image is displayed as a black image. You can also set each pixel value of the blank image to (255,255,255), and the blank image is displayed as a white image. The image base plate generated by the blank image displays the watermark image at the preset position, and displays the black image or white image at other positions except the preset position.

During the watermark adding process, the second image can be added to the first area of the blank image. In the subsequent watermark recognition process, the watermark information is extracted from the image according to the above-mentioned first region.

When processing the original image with this image base, a blank image and image base with the same size and resolution as the original image can be generated first, and each pixel value of the image base except the preset position is set to (0,0 ,0), the pixel value on the image floor can also be set to other pixel values, and the realization principle is the same. In the following description, each pixel value of the image base plate except the preset position is set to (0,0,0).

The original image is combined with the image base to generate an image with watermark. Specifically, if the pixel value at the corresponding position of the image bottom plate is (0, 0, 0), the pixel value at that position of the processed image remains unchanged. If the pixel value at the corresponding position of the image bottom plate is not (0, 0, 0), the pixel value of the processed image at this position is the pixel value on the image bottom plate. This method enables the processed image to display watermark information at a preset position.

The position of the first region corresponds to the position of the image sub-region in the original image. For example, assuming that the size and resolution of the blank image are the same as the original image, the position of the first area is the same as the position of the image sub-areas in the original image. The sub-image is extracted from the position of the first area of the original image as the first image, the watermark is added to the first image to generate a second image, and the second image is added to the first area in the blank image to obtain an image base. Finally, the image base and the original image are synthesized. In this way, only the watermark is added to the first area of the original image. Except for the pixels at the watermark position that display the watermark, the other pixels of the original image remain unchanged. Thereby, the visual difference between the images before and after processing is reduced, and the user experience is improved.

Further, the size of the watermark added to the original image can be set smaller than the size of the original image, or the watermark can be added to the edge position of the original image. This makes it difficult for human eyes to detect and does not affect the user's visual experience.

Further, if the watermark information is text information, there is no need to store the image template. Through image recognition and other technologies, the text added in the picture is recognized, and the text is compared with the text corresponding to the watermark information stored in the system to determine whether the image has been tampered with during transmission. Compared with storing the image information corresponding to the watermark, storing the text information corresponding to the watermark is more flexible in operation and can also save system storage space.

In the above-mentioned watermark adding method provided by the embodiment of the present invention, the watermark information is added to the original image, and then the watermark information carried in the subsequent image can be extracted and analyzed to determine whether the image has been tampered with or damaged. Once the image has been tampered with or destroyed, the image can be discarded and the corresponding security investigation can be carried out. This can solve the problem that the image is often tampered and destroyed during the user's use of the image, which causes the system in the network to fail to operate normally .

In addition, the tampered pictures may contain viruses or Trojan horses that threaten the security of the system. Therefore, the present invention can also solve the security problem caused by the picture being tampered with during transmission.

Referring to Fig. 3, Fig. 3 is a schematic flowchart of another watermark adding method provided by an embodiment of the present invention. In the embodiment of the present invention, the method includes:

S301. Acquire a high-frequency area of the original image, where the high-frequency area is located at a first area of the original image.

The high frequency area information is the area information in the image where the brightness or gray level of the image changes greatly. The low-frequency area information is the area information in the image where the brightness or gray level of the image changes little. The high frequency area usually corresponds to the edge area and the noise area in the image, and the low frequency area usually corresponds to the large patch area in the image. The high and low frequency region information of the image can be obtained by PCA (principal components analysis) technology or whitening operation and other technical means, which will not be repeated here.

S302. Intercept the image sub-region of the original image at the first region to generate a first image.

S303. Process the first image based on the watermark to obtain a second image.

For the specific process of S303, refer to the description of S201 in FIG. 2, which will not be repeated here.

S304. Use the second image to process the original image to add the watermark to the first area of the original image.

For the specific process of S303, refer to the description of S202 in FIG. 2, which will not be repeated here.

The above-mentioned watermark adding method provided by the embodiment of the present invention can add watermark information to the high frequency area of the original image. Because the high frequency area usually corresponds to the edge area and the noise area in the image, the low frequency area usually corresponds to the large patch area in the image. Therefore, adding a watermark to the high-frequency area of the original image, compared to adding a watermark to the low-frequency area of the original image, is to add the watermark to the insensitive area of the human eye, which can lessen the user's visual effect and is not easy to cause User perception.

Referring to Figure 4, Figure 4 is a schematic flowchart of another watermark adding method provided by an embodiment of the present invention. In the embodiment of the present invention, the method includes:

S401: Add a watermark to the first image to obtain a third image.

S402. Splicing the first image and the third image to obtain the second image.

S403. Use the second image to process the original image to add the watermark to the original image.

Among them, the specific process of S403 can refer to the description of S202 in FIG. 2, which will not be repeated here.

The image to be recognized contains a first image and a third image, wherein the first image does not contain a watermark, and the third image is the first image after adding a watermark. During recognition, the first image and the third image are extracted from the image to be recognized, and the watermark can be recognized by comparing the first image and the third image. In the above-mentioned watermark adding method provided by the embodiment of the present invention, the watermark information can be extracted by comparing the first image and the third image. Compared with the need to analyze and compare the entire image to be recognized, the watermark can be extracted, which improves Speed and efficiency of watermark extraction.

Referring to Fig. 5, Fig. 5 is a schematic flowchart of another watermark adding method provided by an embodiment of the present invention. In the embodiment of the present invention, the method includes:

S501: Process the first image based on the watermark to obtain a second image.

For the specific process of S501, refer to the description of S201 in FIG. 2, which will not be repeated here.

S502. Add the second image to a predetermined position of the blank image to generate an image base plate.

The predetermined location can be set according to specific needs. If the second image is to be added to the second area of the original image, the predetermined position is the corresponding position of the second area of the original image in the blank image. The predetermined position may also be a preset position in the blank image.

S503: Synthesize the image base plate and the original image.

For the specific process of S503, refer to the description of S202 in FIG. 2, which will not be repeated here.

In the watermark adding method provided by the foregoing embodiment, the watermark information is added to the original image through the image backplane, and then the watermark information carried in the subsequent image information can be extracted and analyzed to determine whether the image has been tampered with or destroyed during transmission.

Refer to Fig. 6, which is a schematic flowchart of a watermark recognition method provided by an embodiment of the present invention. In the embodiment of the present invention, the method includes:

S601. Acquire an image to be recognized, where the image to be recognized is generated by processing an original image based on a second image, and the second image is obtained by processing the first image based on a watermark.

Watermark information is digital information added to the image file, which can be image information, sequence information, or a combination of image information and sequence information. The sequence information can be a combination of text information and digital information. The specific watermark information can be set according to specific needs.

For the specific steps of generating the second image based on the first image and processing the original image based on the second image, refer to the relevant expressions in S201 and S202 above for details, and will not be repeated here.

S602. Identify the watermark in the image to be identified.

The watermark information in the image to be recognized can be obtained in many ways, including but not limited to the following ways or a combination thereof:

(1) Through the predetermined position information saved in the system, the predetermined position information represents the addition position information of the image template in the original image. Based on the predetermined location information, the watermark information is directly extracted from the image to be recognized.

(2) Watermark information is text information, such as company name, business name and other specific words, numbers or combinations. Through image recognition technology, it is recognized whether the image to be recognized contains the text information, and then it is determined whether the recognized image contains a watermark corresponding to the text content.

(3) The original image is stored in the system, and the watermark information in the image to be recognized is obtained by comparing the original image with the image to be recognized.

S603: Based on the watermark information, determine whether the image to be recognized is a tampered image.

When the watermark information is text information, there is no need to store the second image, and only the text information corresponding to the watermark information is stored. Through image recognition and other technologies, the text contained in the watermark is recognized, and the text is compared with the text corresponding to the watermark information stored in the system to determine whether the image has been tampered with during transmission.

When the watermark information is image information, extract the watermark information in the image to be recognized, and analyze and compare it with the watermark information stored in the system to determine whether the image has been tampered with during transmission.

Based on the watermark information, the method for determining whether the image to be identified is a tampered image includes, but is not limited to, the above-mentioned implementation methods. All methods that can be implemented to determine whether the image to be identified is a tampered image are within the protection scope of the present invention.

The above-mentioned watermark recognition method provided by the embodiment of the present invention extracts and analyzes the watermark information carried by subsequent image information to determine whether the image has been tampered with or destroyed during transmission. Once the image has been tampered with or destroyed, the image can be discarded and the corresponding security investigations can be performed. This can solve the problem that the image is often tampered and destroyed during the transmission process, which causes the system in the network to fail to operate normally.

Refer to Figure 7, which is a schematic flowchart of another watermark recognition method provided by an embodiment of the present invention. In the embodiment of the present invention, the method includes:

S701. Add the watermark to the first image to obtain a third image.

For the specific process of S701, refer to the description of S401 in FIG. 4, which is not repeated here.

S702. Splicing the first image and the third image to obtain a second image.

For the specific process of S702, refer to the description of S402 in FIG. 4, which is not repeated here.

S703: Process the original image based on the second image to generate a processed image.

Optionally, the image to be recognized is generated by processing the original image based on the second image, including:

The image base and the original image are synthesized.

For the specific process of S703, refer to the description of S403 in FIG. 4, which is not repeated here.

S704. Acquire an image to be recognized, where the image to be recognized corresponds to the processed image.

For example, when promoting an education platform, an online education platform needs to first send a promotion image to the participants. After the participant promotes, the forwarded image based on the promotion image will be sent to the online education platform. The forwarded image can be a screenshot of WeChat ( Such as Moments screenshots, WeChat group screenshots, etc.), Weibo screenshots or browser screenshots, etc. The forwarded image is an image to be recognized, the promotion image is a processed image, and the forwarded image corresponds to the promotion image.

For another example, the online education platform first sends task images related to the learning task to the students. After the students complete the learning, they send a progress image generated based on the task image to the platform. The progress image is an image that has completed a predetermined amount of learning tasks. The above progress image is an image to be recognized, the above task image is a processed image, and the progress image corresponds to the task image.

S705: Extract the first image and the third image in the image to be recognized.

If the first image and the third image cannot be extracted from the image to be recognized, the image to be recognized is a tampered image. If the first image and the third image can be extracted from the image to be recognized, step S706 is executed.

Optionally, the extracting the first image and the third image includes:

The first image and the third image are extracted from the sub-region.

S706. Compare the first image and the third image to extract the watermark.

S707: Determine whether the image to be recognized is a tampered image based on the watermark extracted in S706.

If the watermark extracted in S706 meets the preset rule, the image to be recognized is a legal image. The preset rules can be set according to actual needs. For example, the extracted watermark is an image. If the image is consistent with the watermark image stored in the system, the image to be recognized is a legal image. If the text information contained in the extracted watermark matches the preset text information, such as company name, business name, course name, etc., the image to be recognized is a legal image. If the extracted watermark is a two-dimensional code watermark, and the two-dimensional code watermark conforms to the two-dimensional code watermark information pre-stored in the system, the image to be recognized is a legal image.

In the above-mentioned watermark recognition method provided by the embodiment of the present invention, the watermark information can be extracted by comparing the first image and the third image. Compared with the need to analyze and process the entire image to be recognized, the watermark information can be extracted, which improves the extraction of watermark information. Speed and efficiency.

FIG. 8A is a schematic diagram of an original image provided by one or some embodiments of the present invention, and the original image is a promotional poster. Figure 8B is a schematic diagram of an image template containing watermark information provided by one or some embodiments of the present invention. The watermark information includes text information "VIPKID". The watermark information can also be set based on copyright information, service information, and user information . FIG. 8C is a schematic diagram of an image processed by the watermark adding method shown in FIG. 3 provided by one or some embodiments of the present invention. In one or some embodiments, the watermark adding method shown in FIG. 3 in the embodiment of the present invention adds watermark information to the high-frequency area of the original image. Because the high frequency area usually corresponds to the edge area and the noise area in the image, the low frequency area usually corresponds to the large patch area in the image. Therefore, adding a watermark to the high-frequency area of the original image, compared to adding a watermark to the low-frequency area of the original image, is to add the watermark to the insensitive area of the human eye, which can lessen the user's visual effect and is not easy to cause User perception. By comparing the original pictures and processed images in Figs. 8A and 8C, it can be seen that it is difficult for human eyes to perceive the difference between the two.

The foregoing Figures 2 to 5 illustrate in detail the watermark adding method of the embodiment of the present application.

Please refer to Figure 9. Figure 9 is a schematic structural diagram of a watermark adding device provided by an embodiment of the present invention, referred to as device 9. The device 9 may include:

The obtaining unit 901 is configured to process the first image based on the watermark to obtain the second image;

The adding unit 902 is configured to process the original image by using the second image to add the watermark to the original image.

Optionally, the adding unit 902 is specifically configured to add the second image to the first area in the blank image to obtain an image base plate, and the position of the first area and the image sub-area are in the original The position in the image corresponds;

The image base and the original image are synthesized.

Optionally, the image sub-region is a high-frequency region.

Optionally, the obtaining unit 901 is specifically configured to:

Adding the watermark to the first image to obtain a third image;

Stitching the first image and the third image to obtain the second image.

The above-mentioned Figures 6 and 7 illustrate in detail the watermark recognition method of the embodiment of this application.

Please refer to Fig. 10. Fig. 10 is a schematic structural diagram of a watermark recognition device provided by an embodiment of the present invention, referred to as device 10, and the device 10 may include:

The obtaining unit 1001 is configured to obtain an image to be recognized, wherein the image to be recognized is generated by processing an original image based on a second image, and the second image is obtained by processing the first image based on a watermark;

The recognition unit 1002 is configured to recognize the watermark in the image to be recognized;

The determining unit 1003 is configured to determine whether the image to be recognized is a tampered image based on the watermark.

Optionally, the device further includes a generating unit 1004, configured to add the watermark to the first image to obtain a third image;

Stitching the first image and the third image to obtain the second image.

Optionally, the identification unit 1002 is specifically configured to: extract the first image and the third image, and compare the first image and the third image to identify the watermark.

Optionally, the generating unit 1004 is further configured to:

The image base and the original image are synthesized.

Optionally, the recognition unit 1002 is further configured to determine a sub-region corresponding to the position of the first region in the image to be recognized;

The first image and the third image are extracted from the sub-region.

Those skilled in the art can clearly understand that the technical solutions of the embodiments of the present invention can be implemented by software and/or hardware. The "unit" and "module" in this specification refer to software and/or hardware that can independently complete or cooperate with other components to complete specific functions. The hardware may be FPGA (Field-Programmable Gate Array), for example. , IC (Integrated Circuit, integrated circuit), etc.

The processing units and/or modules in the embodiments of the present invention may be implemented by analog circuits that implement the functions described in the embodiments of the present invention, or may be implemented by software that implements the functions described in the embodiments of the present invention.

The embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above-mentioned image processing method are realized. The computer-readable storage medium may include, but is not limited to, any type of disk, including floppy disks, optical disks, DVDs, CD-ROMs, micro drives, and magneto-optical disks, ROM, RAM, EPROM, EEPROM, DRAM, VRAM, flash memory devices , Magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of media or equipment suitable for storing instructions and/or data.

Refer to FIG. 11, which shows a schematic structural diagram of an electronic device related to an embodiment of the present invention. The electronic device can be used to implement the watermark adding method or the watermark identifying method provided in the foregoing embodiment. Specifically:

The memory 1120 may be used to store software programs and modules. The processor 1180 executes various functional applications and data processing by running the software programs and modules stored in the memory 1120. The memory 1120 may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; The data (such as audio data, phone book, etc.) created by the use of the terminal device, etc. In addition, the memory 1120 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices. Correspondingly, the memory 1120 may further include a memory controller to provide the processor 1180 and the input unit 1130 to access the memory 1120.

The input unit 1130 may be used to receive inputted digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. Specifically, the input unit 1130 may include a touch-sensitive surface 1131 (for example, a touch screen, a touch pad, or a touch frame). The touch-sensitive surface 1131, also called a touch screen or a touch pad, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on or on the touch-sensitive surface 1131. Touch-sensitive surface 1131), and drive the corresponding connection device according to the preset program. Optionally, the touch-sensitive surface 1131 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 1180, and can receive and execute the commands sent by the processor 1180. In addition, the touch-sensitive surface 1131 can be realized by multiple types such as resistive, capacitive, infrared, and surface acoustic wave.

The display unit 1140 may be used to display information input by the user or information provided to the user and various graphical user interfaces of the terminal device. These graphical user interfaces may be composed of graphics, text, icons, videos, and any combination thereof. The display unit 1140 may include a display panel 1141. Optionally, the display panel 1141 may be configured in the form of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), etc. Further, the touch-sensitive surface 1131 can cover the display panel 1141. When the touch-sensitive surface 1131 detects a touch operation on or near it, it is transmitted to the processor 1180 to determine the type of the touch event, and then the processor 1180 determines the type of the touch event. Type provides corresponding visual output on the display panel 1141. Although in FIG. 11, the touch-sensitive surface 1131 and the display panel 1141 are used as two independent components to implement input and input functions, in some embodiments, the touch-sensitive surface 1131 and the display panel 1141 can be integrated to implement input And output function.

The processor 1180 is the control center of the terminal device. It uses various interfaces and lines to connect the various parts of the entire terminal device, runs or executes the software programs and/or modules stored in the memory 1120, and calls data stored in the memory 1120. , Perform various functions of the terminal equipment and process data, so as to monitor the terminal equipment as a whole. Optionally, the processor 1180 may include one or more processing cores; among them, the processor 1180 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, and application programs, etc. The modem processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 1180.

Specifically, in this embodiment, the display unit of the terminal device is a touch screen display, and the terminal device also includes a memory and one or more programs. One or more programs are stored in the memory and configured to be configured by one or more programs. The execution of the one or more programs by the above processor includes the steps of implementing the above watermark adding method and/or watermark identifying method.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, such as: multiple units or components can be combined, or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms of.

The functional units in the embodiments of the present invention can be all integrated into one processing unit, or each unit can be individually used as a unit, or two or more units can be integrated into one unit; the above-mentioned integrated unit It can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A watermark adding method, characterized in that the method includes:

Processing the first image based on the watermark to obtain the second image;

The original image is processed by using the second image to add the watermark to the original image.
The method according to claim 1, wherein the first image is generated based on image sub-regions of the original image.
The method according to claim 2, wherein the processing the original image by using the second image comprises:

Adding the second image to the first area in the blank image to obtain an image bottom plate, and the position of the first area corresponds to the position of the image sub-area in the original image;

The image base and the original image are synthesized.
The method according to claim 2, wherein the image sub-region is a high-frequency region.
The method according to any one of claims 1-4, wherein the processing the first image based on the watermark to obtain the second image comprises:

Adding the watermark to the first image to obtain a third image;

Stitching the first image and the third image to obtain the second image.
The method according to any one of claims 1 to 4, wherein the watermark is generated based on configuration information, and the configuration information includes at least one of the following: content information of the original image, service information, and user information.
A watermark recognition method, characterized in that the method includes:

Acquiring an image to be recognized, wherein the image to be recognized is generated by processing an original image based on a second image, and the second image is obtained by processing the first image based on a watermark;

Identifying the watermark in the image to be identified;

Based on the watermark, it is determined whether the image to be recognized is a tampered image.
8. The method according to claim 7, wherein the second image is obtained by processing the first image based on the watermark, comprising:

Adding the watermark to the first image to obtain a third image;

Stitching the first image and the third image to obtain the second image.
The method according to claim 87, wherein the identifying the watermark in the image to be identified comprises: extracting the second image based on the first image and the third image of the second image, The first image and the third image are compared to identify the watermark.
The method according to claim 9, wherein the image to be recognized is generated by processing the original image based on the second image, comprising:

Adding the second image to the first area in the blank image to obtain an image base plate;

The image base and the original image are synthesized.
The method according to claim 10, wherein said extracting said first image and said third image comprises:

Determining a sub-region corresponding to the position of the first region in the image to be recognized;

The first image and the third image are extracted from the sub-region.
A watermark adding device, characterized in that the device comprises:

An obtaining unit, configured to process the first image based on the watermark to obtain the second image;

The adding unit is configured to use the second image to process the original image to add the watermark to the original image.
A watermark recognition device, characterized in that the device includes:

An acquiring unit, configured to acquire an image to be identified, wherein the image to be identified is generated by processing an original image based on a second image, and the second image is obtained by processing the first image based on a watermark;

An identification unit for identifying the watermark in the image to be identified;

The determining unit is configured to determine whether the image to be recognized is a tampered image based on the watermark.
A computer-readable storage medium having a computer program stored thereon, characterized in that the program implements the steps of the method in any one of claims 1-11 when the program is executed by a processor.
An electronic device, comprising a memory, a processor, and a computer program stored on the memory and running on the processor, wherein the processor implements any one of claims 1-11 when the program is executed The steps of the method described in item.