CN112395565A

CN112395565A - Watermark information embedding and extracting method and device and electronic equipment

Info

Publication number: CN112395565A
Application number: CN201910753377.7A
Authority: CN
Inventors: 肖文彬; 谭丽丽; 张晓川
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Guangdong Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Guangdong Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2021-02-23

Abstract

The embodiment of the specification provides watermark information embedding and extracting methods, devices and electronic equipment, wherein the method comprises the following steps: the method comprises the steps of obtaining watermark information and a target text to be processed, carrying out blocking processing on the watermark information to obtain a plurality of watermark information blocks, then embedding a watermark information code corresponding to each watermark information block into the target text to obtain the target text carrying the plurality of watermark information codes, wherein the watermark information codes embedded into the processed target text are invisible. Therefore, the obtained watermark information code is directly embedded into the target text, so that the limitation that the existing digital watermark depends on the text format is broken through, the editable text format is richer, and the method has wide applicability.

Description

Watermark information embedding and extracting method and device and electronic equipment

Technical Field

The present disclosure relates to the field of information hiding technologies, and in particular, to a method and an apparatus for embedding and extracting watermark information, and an electronic device.

Background

With the arrival of the big data era, the value of data information is fully mined, convenience is provided for life of people, the data sharing efficiency is improved, and meanwhile the potential safety hazard that personal information is leaked is increased. For the purpose of data leakage traceability, a method of adding a watermark in the background of a user interface (such as a web page) or a document is generally adopted.

At present, a semantic-based watermarking technology is generally adopted for watermarking a text. The watermark is inserted by performing imperceptible micro adjustment on original data by utilizing line space coding, word space coding and feature coding, such as adjusting lines and word spaces, changing font colors and the like, and then relevant features are extracted from the original data for restoration. However, such format-based watermarking technology depends on a specific document format, is low in robustness, and is prone to the problem of extracting wrong information.

Disclosure of Invention

The embodiments of the present specification provide a method, an apparatus, and an electronic device for embedding and extracting watermark information, so as to solve the problem that in the prior art, a watermark adding process depends on a specific document format, robustness is low, and extraction errors are likely to occur.

In order to solve the technical problem, the embodiment of the present specification is implemented as follows:

in a first aspect, an embodiment of the present specification provides a watermark information embedding method, including:

acquiring watermark information and a target text to be processed;

the watermark information is processed in a blocking mode to obtain a plurality of watermark information blocks;

and embedding the watermark information code corresponding to each watermark information block into the target text to obtain the target text carrying a plurality of watermark information codes, wherein the watermark information codes embedded into the target text are invisible.

In a second aspect, an embodiment of the present specification provides a method for extracting watermark information, including:

acquiring a target text carrying a watermark information code;

determining an effective watermark information block contained in the target text according to the watermark information code carried in the target text;

splicing the effective watermark information blocks contained in the target text according to the position information recorded in the effective watermark information blocks to obtain target watermark information blocks;

and determining watermark information in the target text based on the target watermark information block.

In a third aspect, an embodiment of the present specification provides an apparatus for embedding watermark information, including:

the text acquisition module is used for acquiring watermark information and a target text to be processed;

the information block generating module is used for carrying out block processing on the watermark information to obtain a plurality of watermark information blocks;

and the text generation module is used for embedding the watermark information code corresponding to each watermark information block into the target text to obtain the target text carrying a plurality of watermark information codes, wherein the watermark information codes embedded into the target text are invisible.

In a fourth aspect, an embodiment of the present specification provides an apparatus for extracting watermark information, including:

the target text acquisition module is used for acquiring a target text carrying a watermark information code;

an information block determining module, configured to determine, according to a watermark information code carried in the target text, an effective watermark information block included in the target text;

the target generation module is used for splicing the effective watermark information blocks contained in the target text according to the position information recorded in the effective watermark information blocks to obtain target watermark information blocks;

and the watermark information determining module is used for determining the watermark information in the target text based on the target watermark information block.

In a fifth aspect, embodiments of the present specification provide an electronic device, including a processor, a communication interface, a memory, and a communication bus; the processor, the communication interface and the memory complete mutual communication through a bus; the memory is used for storing a computer program; the processor is configured to execute the program stored in the memory, and implement the steps of the method for embedding watermark information according to the first aspect, and/or implement the steps of the method for extracting watermark information according to the second aspect.

In a sixth aspect, the present specification provides a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the embedding method of watermark information according to the first aspect, and/or implements the steps of the extracting method of watermark information according to the second aspect.

According to the technical scheme provided by the embodiment of the specification, the embodiment of the specification obtains a plurality of watermark information blocks by obtaining the watermark information and the target text to be processed and carrying out block processing on the watermark information, and then embeds the watermark information code corresponding to each watermark information block into the target text to obtain the target text carrying the plurality of watermark information codes, wherein the watermark information code embedded into the processed target text is invisible. Therefore, by the method of partitioning the watermark information to obtain a plurality of watermark information blocks and then directly embedding the watermark information code corresponding to each watermark information block into the target text, the limitation that the existing watermark adding technology depends on the text format is broken through, the problems of low robustness and easy extraction error are solved, and meanwhile, the editable text format is richer and has wide applicability.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a first flowchart of a method for embedding watermark information according to an embodiment of the present disclosure;

fig. 2 is a second flowchart of a method for embedding watermark information according to an embodiment of the present disclosure;

fig. 3 is a third flowchart of a method for embedding watermark information according to an embodiment of the present disclosure;

fig. 4 is a first flowchart of a method for extracting watermark information according to an embodiment of the present disclosure;

fig. 5 is a second flowchart of a method for extracting watermark information according to an embodiment of the present disclosure;

fig. 6 is a third flowchart of an extraction method of watermark information provided in an embodiment of the present disclosure;

fig. 7 is a schematic block diagram illustrating an apparatus for embedding watermark information according to an embodiment of the present disclosure;

fig. 8 is a schematic view of a first structure of an electronic device provided in an embodiment of the present disclosure;

fig. 9 is a schematic block diagram illustrating an apparatus for extracting watermark information according to an embodiment of the present disclosure;

fig. 10 is a second structural schematic diagram of an electronic device provided in an embodiment of the present disclosure;

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present specification provides a method for embedding watermark information, where an execution subject of the method may be a server, where the server may be an independent server, or may be a server cluster composed of multiple servers. The method may be used to embed watermark information in text.

Fig. 1 is a first flowchart of a method for embedding watermark information according to one or more embodiments of the present disclosure, where as shown in fig. 1, the method at least includes the following steps:

s101, acquiring watermark information and a target text to be processed.

The watermark information may include various information, for example, the watermark information may include one or more of chinese kanji (e.g., all copyrights of a company), english characters, japanese logos, numeric information (e.g., roman numerals, arabic numerals, etc.), and commonly used symbols (e.g., #, @ etc.). The target text may be a text in a certain format, such as doc or docx format text, PDF format text, HTML format text, txt format text, etc.

In implementation, the watermark information and the target text to be processed may be obtained in a variety of different manners, for example, a corresponding page may be preset, and the page may include a watermark uploading input box, a text uploading input box, an uploading key, a canceling key, and the like. When a user needs to add a watermark to a text, the page can be opened, information of the watermark to be added and the target text to be processed can be input in a watermark uploading input box and a text uploading input box of the page respectively, after the input is finished, an uploading key can be clicked, at the moment, the server can obtain the information in the input boxes, and therefore the server can obtain the watermark information and the target text to be processed.

S102, the watermark information is subjected to block processing to obtain a plurality of watermark information blocks.

In implementation, if the entire watermark information (such as the copyright of a certain company) is stored in a text file as a continuous information block, once information at a certain position in the text file is lost or damaged, the whole watermark information block is likely to be lost or damaged, and finally the entire watermark information is invalid.

Specifically, the basic unit of information stored in a computer is byte, i.e., 8 bit bits (one bit is 0 or 1). For example, the watermark information is "all the mobile copyright of china", and the number of the chinese characters constituting the watermark information is 8, and then 2 × 8 bytes (two bytes of one chinese character) are occupied in the computer, that is, 16 bytes, that is, 16 × 8 bits. The server can divide the machine codes of 16 x 8 bits forming the Chinese mobile copyright owner into blocks according to a preset dividing rule by reading the machine codes of the Chinese mobile copyright owner stored in the computer.

For example, the watermark information machine code of "all the chinese mobile copyright" may be divided into 16 blocks according to every 8 bits (i.e., every byte), so as to obtain 16 watermark information blocks, where each watermark information block includes 8 machine codes (i.e., 8 bits); or, the machine code "all the chinese mobile copyright" stored in the computer may be divided into 32 blocks according to every 4 bits to obtain 32 watermark information blocks, where each watermark information block includes 4 machine codes (i.e., 4 bits). In this embodiment, the specific blocking manner for blocking the watermark information to obtain the watermark information block is not limited, and any manner for blocking the machine code of the watermark information stored in the computer to obtain a plurality of watermark information blocks belongs to the protection scope of this embodiment.

S103, embedding the watermark information code corresponding to each watermark information block into a target text to obtain the target text carrying a plurality of watermark information codes, wherein the watermark information codes embedded in the processed target text are invisible.

In implementation, the watermark information encoding rule and a specific character can be preset. According to the watermark information encoding rule, the machine code in each watermark information block is sequentially converted into a specific character, then the watermark information code is generated based on the specific character converted, and the generated watermark information code is randomly embedded into the target text. For example, the machine code in a certain information block is 11000001, the selected certain specific character is X and Y, the preset watermark information encoding rule is that X corresponds to the machine code 0 in the watermark information block, Y corresponds to the machine code 1 in the watermark information block, and the machine code in the watermark information block is converted into the watermark information code consisting of the specific character X, Y according to the preset watermark information encoding rule: yyxxxxx, the watermark information code yyxxxxx may then be randomly embedded into the end of each line in the target text, or randomly embedded into any position in the target text.

In the embodiment of the description, watermark information and a target text to be processed are obtained, the watermark information is subjected to blocking processing to obtain a plurality of watermark information blocks, then a watermark information code corresponding to each watermark information block is embedded into the target text to obtain the target text carrying the plurality of watermark information codes, and the watermark information codes embedded into the processed target text are invisible. Therefore, by the method of partitioning the watermark information to obtain a plurality of watermark information blocks and then directly embedding the watermark information code corresponding to each watermark information block into the target text, the limitation that the existing watermark adding technology depends on the text format is broken through, the problems of low robustness and easy extraction error are solved, and meanwhile, the editable text format is richer and has wide applicability.

As shown in fig. 2, the specific processing manner of S102 may be various, and an alternative processing manner is provided below, which may specifically refer to the processing of S1021-S1022 described below.

And S1021, partitioning the watermark information to obtain a plurality of initial watermark information blocks.

In the implementation, for example, ASCII, the machine code of the watermark information, i.e. each bit of the watermark information in the computer, is read. In the implementation, taking the watermark information "ab" as an example, the machine code of the watermark information ab is 1100000101100010, and the machine code of the ab is divided into two blocks according to each 8 bits to obtain two initial watermark information blocks (i.e., an initial watermark information block a and an initial watermark information block b), where the machine code of the watermark information included in the initial watermark information block a is 11000001, and the machine code of the watermark information included in the initial watermark information block b is 01100010.

In the process of extracting the watermark information embedded into the target text, the extracted watermark information blocks need to be spliced to generate the watermark information. Therefore, after the watermark information is subjected to the block processing to obtain a plurality of initial watermark information blocks, the processing of S1022 needs to be performed.

S1022, a plurality of watermark information blocks are generated according to each initial watermark information block and the predetermined information to be added.

The predetermined information at least comprises information representing the position of the target watermark information corresponding to each initial watermark information block in the watermark information. The information of the position of the target watermark information corresponding to each initial watermark information block in the watermark information may be an information number of arrangement of the target watermark information corresponding to each initial watermark information block in the watermark information, for example, based on the example of the watermark information ab in S1021, an information number of ranking of the target watermark information a corresponding to the initial watermark information block a in the watermark information ab is 1, and an information number of ranking of the target watermark information b corresponding to the initial watermark information block b in the watermark information ab is 2.

Considering that, in order to facilitate the subsequent checking whether the extracted watermark information is complete and valid, it is further necessary to determine whether the length of each watermark information block is equal to the length of the current watermark information block, and determine whether the length of the extracted watermark information is equal to the length of the target watermark information, therefore, the predetermined information may further include: the total length of the watermark information and the length of the watermark information block.

Thus, each generated watermark information block may include the following information: the watermark information comprises a total watermark information length, an information sequence number, a watermark information block length and target watermark information, wherein the total watermark information length and the information sequence number, the information sequence number and the watermark information block length, and the watermark information block length and the target watermark information are separated by separators.

As shown in the following table, table 1 shows information blocks of watermark information "ab" before machine code conversion, and table 2 shows information blocks of watermark information "ab" after machine code conversion.

TABLE 1

Total length of watermark information	Information sequence number	Watermark information block length	Target watermark information
				2	1	1	a
2	2	1	b

TABLE 2

Total length of watermark information	Information sequence number	Watermark information block length	Target watermark information
				00000010	00000001	00000001	11000001
00000010	00000010	00000001	01100010

As shown in fig. 3, the method further includes:

s104, acquiring a preset watermark coding character, and constructing a watermark information coding rule based on the watermark coding character.

The predetermined watermark encoding characters may be BOM (Byte Order Mark) or may be arbitrarily set characters (e.g., X, Y, #, @,%).

In practice, the predetermined watermark encoding character may be a BOM, which is an invisible character to the text editor user. Therefore, in the embodiment, the watermark information can be hidden in the target text by using the BOM characters, and the purpose of being not discovered can be achieved.

The above watermark information encoding rule constructed based on the watermark encoding characters may be: one BOM is used to correspond to machine code 0 in the watermark information block and two BOMs (i.e., bomcom) are used to correspond to machine code 1 in the watermark information block.

In addition, in order to quickly identify the watermark information blocks hidden in the target text in the subsequent process of extracting the watermark information, the start identifier and the end identifier of the information block can be added to each information block. The start identifier of the information block may be identified by 3 BOMs (i.e., bomombbom), and the end identifier of the information block may be identified by 4 BOMs (i.e., bomombbom). As shown in table 3, table 3 is an information encoding mapping table designed based on the watermark information encoding rule in this embodiment.

TABLE 3

Character string	Machine code
		BOM	0
BOMBOM	1
		BOMBOMBOM	Start identifier of information block
BOMBOMBOMBOM	End of block identifier

In S102, after the watermark information is subjected to the block processing to obtain a plurality of watermark information blocks, the following processing in S105 may be performed.

And S105, converting the watermark information contained in the watermark information block into a watermark information code according to the watermark information coding rule.

Specifically, based on the example of the watermark information "ab" in S1022 and the watermark information block of the target watermark information a in table 2, it can be seen that the watermark information block of the target watermark information a includes the following watermark information: 00000010|00000001|00000001|11000001, the result of converting the watermark information contained in the watermark information block into a watermark information code according to the above watermark information encoding rule is shown in table 4:

TABLE 4

BOMBOMBOM

BOM

BOMBOM

BOM

Start mark

2

BOM

BOMBOM

BOM

1

BOM BOM

BOM

BOMBOM

BOM

BOMBOM

BOMBOMBOMBOM

1

a

Ending mark

The specific processing manner of S103 may be various, and an alternative processing manner is provided below, which may specifically refer to the processing from step one to step two.

Step one, respectively setting the quantity of watermark information codes corresponding to each watermark information block to be embedded into a target text according to the watermark information codes corresponding to different watermark information blocks;

and step two, according to the number of the watermark information codes corresponding to each set watermark information block embedded into the target text, embedding the watermark information codes corresponding to each watermark information block into the target text to obtain the target text carrying a plurality of watermark information codes.

In implementation, in consideration of the comparison between the data amount of the target text file and the data amount of the watermark information, in order to ensure the robustness of the watermark information, the embodiment redundantly stores the watermark information in the target text. The number of watermark information codes corresponding to each watermark information block to be embedded into the target text is set according to the watermark information codes corresponding to different watermark information blocks, for example, if the watermark information is divided into m information blocks, multiple copies can be set to be redundantly stored in n, the m × n watermark information codes corresponding to the m × n information blocks are randomly embedded into the target text, and finally the target text carrying the m × n watermark information codes is obtained.

The embodiment of the specification provides a watermark information embedding method, which includes the steps of obtaining watermark information and a target text to be processed, carrying out blocking processing on the watermark information to obtain a plurality of watermark information blocks, and then embedding a watermark information code corresponding to each watermark information block into the target text to obtain the target text carrying the plurality of watermark information codes, wherein the watermark information codes embedded into the processed target text are invisible. Therefore, by the method of partitioning the watermark information to obtain a plurality of watermark information blocks and then directly embedding the watermark information code corresponding to each watermark information block into the target text, the limitation that the existing watermark adding technology depends on the text format is broken through, the problems of low robustness and easy extraction error are solved, and meanwhile, the editable text format is richer and has wide applicability.

As shown in fig. 4, an execution subject of the method may be a server, where the server may be an independent server or a server cluster composed of multiple servers, and the server may be a server for extracting watermark information, and the method may be used to perform processing of extracting watermark information on a target text to be subjected to watermark information extraction. The method may specifically comprise the steps of:

s201, acquiring a target text carrying a watermark information code.

S202, according to the watermark information code carried in the target text, determining an effective watermark information block contained in the target text.

The watermark information code carries a start identifier and an end identifier of the watermark information block, for example, the start identifier of the watermark information block may be a bomombom, and the end identifier of the watermark information block may be a bomombbomom.

In an implementation, when the server detects a start identifier (e.g., bomombbom) of a watermark information block, reading of the watermark information block is started until an end identifier (e.g., bomombbomom) of the watermark information block is read. If the server reads the initial mark of the watermark information block but does not read the ending mark of the watermark information block, when the initial mark of the watermark information block is read again, the last read watermark information block is omitted, and then the process of reading the watermark information block is repeated. And the server extracts the watermark information block between the read initial mark of the watermark information block and the end mark of the watermark information block, judges whether the watermark information contained in the extracted watermark information block is complete or not, and determines that the extracted watermark information block is an effective watermark information block if the extracted watermark information block is complete.

And S203, splicing the effective watermark information blocks contained in the target text according to the position information recorded in the effective watermark information blocks to obtain the target watermark information blocks.

Specifically, based on the example of the watermark information "ab" in S1022, the information block of the watermark information "ab" after the machine code is converted in table 2, and the information encoding mapping table designed based on the watermark information encoding rule in table 3. Firstly, the watermark information codes of the watermark information block a and the watermark information block b can be converted into the machine code of the watermark information block a and the machine code of the watermark information block b through an information coding mapping table designed based on the watermark information coding rule in table 3, according to the information sequence number of the watermark information block a recorded in table 2 being 1 and the information sequence number of the watermark information block b being 2, the machine code 11000001 of the target watermark information a and the machine code 01100010 of the target watermark information block b are spliced to obtain the target watermark information block ab, wherein the machine code of the target watermark information block ab is 11000001| 01100010.

And S204, determining watermark information in the target text based on the target watermark information block.

Specifically, based on the obtained machine code 11000001|01100010 of the target watermark information block ab, it is determined that the watermark information in the target text before being converted into the machine code is "ab".

As shown in fig. 5, the specific processing manner of S202 may be various, and an alternative processing manner is provided below, which may specifically refer to the processing of S2021 to S2025 described below.

S2021, screening out watermark information blocks according to the watermark information codes carried in the target text.

S2022, determining whether the watermark information block is complete according to the start identifier, the separator, and the end identifier in the watermark information block.

If the determination result is yes, S2024 is executed, and if the determination result is no, S2023 is executed.

S2023, if the result of the reading is negative, discarding the watermark information block.

S2024, if the determination result is yes, extracting the length of the watermark information block recorded in the watermark information block.

Specifically, based on the example of the watermark information "ab" in S1021 and the information block of the watermark information "ab" after the machine code conversion in table 2, for example, when the server detects the start identifier of the watermark information block a, it starts to pre-read the encoded information according to the watermark information encoding rule in table 3 until a separator is encountered, counts the number of separators in the watermark information block a, and reads and stores the 8-bit machine code (i.e. 8 bits) recorded by the separator if the number of characters ahead of the separator is 8, and then continues the loop. When the number of the separators is read to be 3, the machine code of every 8 bits is stored into an array and is recorded as a byte, and then the byte is stored into a vector to be stored. Until the end flag of the watermark information block a is encountered, the watermark information block a is determined as a valid watermark information block, and the process of S2025 is performed. If the number of delimiters is not 3 or the number of characters preceding each delimiter is not 8, the watermark information block a is determined to be an invalid watermark information block, and the watermark information block a is discarded.

S2025, determining whether the length of the extracted watermark information block is equal to the length of the current watermark information block.

If the determination result is yes, S2026 is executed, and if the determination result is no, S2023 is executed.

S2026, if the determination result is yes, determining the current watermark information block as an effective watermark information block included in the target text.

Specifically, based on the example of the information block of the watermark information "ab" after the machine code is converted in table 2 in S1022, the extracted watermark information block length 00000001 is converted into decimal, and the length of the watermark information block a is obtained as 1. Extracting the current target watermark information, judging whether the machine code of the current target watermark information is 1 byte in length (namely 8 bit positions), if so, determining the current watermark information block as an effective watermark information block contained in the target text, if not, indicating that the information block a is damaged, and discarding the current watermark information block a.

As shown in fig. 6, after the effective watermark information block included in the target text is determined in S202 according to the watermark information code carried in the target text, the following processing in S205 may also be performed.

And S205, performing deduplication processing on the effective watermark information block to obtain a deduplicated effective watermark information block, wherein the total length of watermark information is recorded in the deduplicated effective watermark information block.

Specifically, for example, based on the second step, in order to ensure the robustness of the watermark information, the watermark information is redundantly stored in the target text, that is, the number of watermark information codes corresponding to each watermark information block that are embedded in the target text is set according to the watermark information codes corresponding to different watermark information blocks, so that it is known that a plurality of repeated watermark information blocks may exist in the target text. In implementation, in order to improve the extraction efficiency of watermark information, after an effective watermark information block existing in a target text is determined, deduplication processing may be performed on the effective watermark information block to obtain a deduplicated effective watermark information block.

The specific processing manner of S203 may be various, and an alternative processing manner is provided below, which may specifically refer to the processing of S2031 to S2033 below.

S2031, according to the position information recorded in the effective watermark information block after the duplication removal, the effective watermark information block after the duplication removal contained in the target text is spliced to obtain an initial watermark information block.

Specifically, based on the example of the information block of the watermark information "ab" after the machine code is switched in table 2 in S1022, the extracted information number 00000001 is converted into decimal for the watermark information block a, and the information number of the watermark information block a is obtained as 1. And aiming at the watermark information block b, converting the extracted information serial number 00000010 into a decimal system to obtain the information serial number 2 of the watermark information block b. Then, according to the position information recorded in the effective watermark information block after the duplication removal, the effective watermark information block after the duplication removal and the effective watermark information block b after the duplication removal included in the target text are spliced to obtain an initial watermark information block, wherein the machine code of the target watermark information included in the initial watermark information block is 1100000101100010.

S2032, determining whether the length of the current initial watermark information block is equal to the total length of the watermark information.

If the determination result is yes, S2033 is executed, and if the determination result is no, S2034 is executed.

S2033, if the judgment result is yes, the current initial watermark information block is determined as the target watermark information block.

S2034, if the judgment result is negative, discarding the current initial watermark information block.

Specifically, based on the example of the information block of the watermark information "ab" after the machine code is converted in table 2 in S1022, the total length of the watermark information 00000010 is extracted, and the extracted total length of the watermark information 00000010 is converted into a decimal number, so that the total length of the watermark information is 2. And judging whether the machine code of the target watermark information contained in the current initial watermark information block is 2 bytes long (namely 2 x 8 bit bits), and if so, determining the current initial watermark information block as the target watermark information block. If the judgment result is no, the initial watermark information block is damaged, and the initial watermark information block is discarded.

An embodiment of the present specification provides a method for extracting watermark information, which includes obtaining a target text carrying watermark information codes, determining effective watermark information blocks included in the target text according to the watermark information codes carried in the target text, splicing the effective watermark information blocks included in the target text according to position information recorded in the effective watermark information blocks to obtain target watermark information blocks, and then determining watermark information in the target text based on the target watermark information blocks. Therefore, the method for determining the watermark information in the target text based on the target watermark information block solves the problems of low robustness and easy extraction error.

On the basis of the same technical concept, the embodiment of the present specification further provides an embedding apparatus for watermark information, and fig. 7 is a schematic diagram of modules of the embedding apparatus for watermark information provided by the embodiment of the present specification, where the embedding apparatus for watermark information is configured to execute the embedding method for watermark information described in fig. 1 to 4, and as shown in fig. 7, the embedding apparatus for watermark information includes:

a text obtaining module 701, configured to obtain watermark information and a target text to be processed;

an information block generating module 702, configured to perform block processing on the watermark information to obtain a plurality of watermark information blocks;

a text generating module 703 is configured to embed the watermark information code corresponding to each watermark information block into the target text, so as to obtain a target text carrying multiple watermark information codes, where the watermark information codes in the target text after embedding processing are invisible.

The embodiment of the specification provides a method for embedding watermark information, which is characterized in that the watermark information is subjected to blocking processing to obtain a plurality of watermark information blocks, and then watermark information codes corresponding to each watermark information block are directly embedded into a target text, so that the limitation that the existing watermark adding technology depends on a text format is broken through, the problems of low robustness and easiness in extraction error are solved, and simultaneously, editable text formats are richer and have wide applicability.

Optionally, the information block generating module 702 is configured to:

partitioning the watermark information to obtain a plurality of initial watermark information blocks;

and generating a plurality of watermark information blocks according to each initial watermark information block and preset information to be added, wherein the preset information at least comprises information representing the position of target watermark information corresponding to each initial watermark information block in the watermark information.

Optionally, the apparatus further comprises:

the information coding construction module is used for acquiring preset watermark coding characters and constructing the watermark information coding rule based on the watermark coding characters;

and the information code generating module is used for converting the watermark information contained in the watermark information block into the watermark information code according to the watermark information coding rule.

Optionally, the text generating module 703 is configured to:

according to watermark information codes corresponding to different watermark information blocks, respectively setting the quantity of the watermark information codes corresponding to each watermark information block, which are embedded into the target text;

and according to the set quantity of the watermark information codes corresponding to each watermark information block embedded into the target text, embedding the watermark information codes corresponding to each watermark information block into the target text to obtain the target text carrying a plurality of watermark information codes.

The embodiment of the present specification provides an embedding device of watermark information, which obtains watermark information and a target text to be processed, and performs block processing on the watermark information to obtain a plurality of watermark information blocks, and then embeds a watermark information code corresponding to each watermark information block into the target text to obtain the target text carrying the plurality of watermark information codes, wherein the watermark information code embedded into the processed target text is invisible. Therefore, by the method of partitioning the watermark information to obtain a plurality of watermark information blocks and then directly embedding the watermark information code corresponding to each watermark information block into the target text, the limitation that the existing watermark adding technology depends on the text format is broken through, the problems of low robustness and easy extraction error are solved, and meanwhile, the editable text format is richer and has wide applicability.

The watermark information embedding method provided in the embodiments of the present specification can implement each process in the embodiments corresponding to the above watermark information embedding method, and is not described here again to avoid repetition.

It should be noted that the embedding apparatus of the watermark information provided in the embodiment of the present specification and the embedding method of the watermark information provided in the embodiment of the present specification are based on the same inventive concept, and therefore, for specific implementation of the embodiment, reference may be made to implementation of the embedding method of the watermark information, and repeated details are not described again.

On the basis of the same technical concept, the embodiment of the present disclosure further provides an electronic device, which is configured to execute the above embedding method of watermark information, and fig. 8 is a schematic structural diagram of an electronic device implementing various embodiments of the present disclosure, as shown in fig. 8. Electronic devices may vary widely in configuration or performance and may include one or more processors 801 and memory 802, where the memory 802 may store one or more stored applications or data. Wherein the memory 802 may be a transient storage or a persistent storage. The application program stored in memory 802 may include one or more modules (not shown), each of which may include a series of computer-executable instructions for the electronic device. Still further, the processor 801 may be configured to communicate with the memory 802 to execute a series of computer-executable instructions in the memory 802 on the electronic device. The electronic device may also include one or more power supplies 803, one or more wired or wireless network interfaces 804, one or more input-output interfaces 805, one or more keyboards 806.

Specifically, in this embodiment, the electronic device includes a processor, a communication interface, a memory, and a communication bus; the processor, the communication interface and the memory complete mutual communication through a bus; the memory is used for storing a computer program; the processor is used for executing the program stored in the memory and realizing the following method steps:

acquiring watermark information and a target text to be processed;

An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and when executed by a processor, the computer program implements the following method steps:

acquiring watermark information and a target text to be processed;

On the basis of the same technical concept, an embodiment of the present disclosure further provides an apparatus for extracting watermark information, where fig. 9 is a schematic diagram of modules of the apparatus for extracting watermark information provided in the embodiment of the present disclosure, and the apparatus for extracting watermark information is configured to execute the method for extracting watermark information described in fig. 5 to 6, as shown in fig. 9, the apparatus for extracting watermark information includes:

a target text acquiring module 901, configured to acquire a target text carrying a watermark information code;

an information block determining module 902, configured to determine, according to the watermark information code carried in the target text, an effective watermark information block included in the target text;

a target generation module 903, configured to splice the effective watermark information blocks included in the target text according to the position information recorded in the effective watermark information blocks to obtain target watermark information blocks;

a watermark information determining module 904, configured to determine watermark information in the target text based on the target watermark information block.

The embodiment of the present specification provides an extraction apparatus of watermark information, which determines an effective watermark information block included in a target text by obtaining a watermark information code carried in the target text, and splices the effective watermark information blocks included in the target text according to position information recorded in the effective watermark information block to obtain a target watermark information block, and then determines watermark information in the target text based on the target watermark information block.

Optionally, the information block determining module 902 is configured to:

screening out watermark information blocks according to the watermark information codes carried in the target text;

judging whether the watermark information block is complete or not according to the starting identifier, the separator and the ending identifier in the watermark information block;

if so, extracting the length of the watermark information block recorded in the watermark information block;

judging whether the length of the extracted watermark information block is equal to that of the current watermark information block or not;

if yes, determining the current watermark information block as an effective watermark information block contained in the target text.

Optionally, the apparatus further comprises:

the processing module is used for carrying out duplication elimination processing on the effective watermark information block to obtain an effective watermark information block after duplication elimination, wherein the effective watermark information block after duplication elimination records the total length of watermark information;

a target generation module 903, configured to splice the duplicate-removed effective watermark information blocks included in the target text according to the position information recorded in the duplicate-removed effective watermark information blocks, so as to obtain initial watermark information blocks;

judging whether the length of the current initial watermark information block is equal to the total length of the watermark information;

and if so, determining the current initial watermark information block as a target watermark information block.

An embodiment of the present specification provides an extraction apparatus of watermark information, which acquires a target text carrying watermark information codes, determines effective watermark information blocks included in the target text according to the watermark information codes carried in the target text, splices the effective watermark information blocks included in the target text according to position information recorded in the effective watermark information blocks to obtain target watermark information blocks, and then determines watermark information in the target text based on the target watermark information blocks. Therefore, the method for determining the watermark information in the target text based on the target watermark information block solves the problems of low robustness and easy extraction error.

The extraction method of the watermark information provided in the embodiments of the present specification can implement each process in the embodiments corresponding to the extraction method of the watermark information, and is not described here again to avoid repetition.

It should be noted that the apparatus for extracting watermark information provided in the embodiment of the present specification and the method for extracting watermark information provided in the embodiment of the present specification are based on the same inventive concept, and therefore specific implementation of the embodiment may refer to implementation of the method for extracting watermark information, and repeated details are not described again.

On the basis of the same technical concept, the embodiment of the present disclosure further provides an electronic device, which is configured to execute the method for extracting watermark information, and fig. 10 is a schematic structural diagram of an electronic device implementing the embodiments of the present disclosure, as shown in fig. 10. Electronic devices may vary widely in configuration or performance and may include one or more processors 1001 and memory 1002, with one or more stored applications or data stored in memory 1002. Memory 1002 may be, among other things, transient storage or persistent storage. The application programs stored in memory 1002 may include one or more modules (not shown), each of which may include a series of computer-executable instructions for the electronic device. Still further, the processor 1001 may be configured to communicate with the memory 1002 to execute a series of computer-executable instructions in the memory 1002 on the electronic device. The electronic device may also include one or more power supplies 1003, one or more wired or wireless network interfaces 1004, one or more input-output interfaces 1005, one or more keyboards 1006.

acquiring a target text carrying a watermark information code;

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the specification. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for embedding watermark information, the method comprising:

acquiring watermark information and a target text to be processed;

2. The method of claim 1, wherein the partitioning the watermark information into a plurality of watermark information blocks comprises:

3. The method of claim 1, further comprising:

acquiring a preset watermark coding character, and constructing a watermark information coding rule based on the watermark coding character;

after the block processing is performed on the watermark information to obtain a plurality of watermark information blocks, the method further includes:

and converting the watermark information contained in the watermark information block into the watermark information code according to the watermark information coding rule.

4. The method according to claim 1, wherein the embedding the watermark information code corresponding to each watermark information block into the target text to obtain the target text carrying a plurality of watermark information codes comprises:

5. A method for extracting watermark information, the method comprising:

acquiring a target text carrying a watermark information code;

6. The method according to claim 5, wherein the determining the valid watermark information block contained in the target text according to the watermark information code carried in the target text comprises:

7. The method of claim 5, further comprising:

carrying out duplicate removal processing on the effective watermark information block to obtain a duplicate-removed effective watermark information block, wherein the total length of watermark information is recorded in the duplicate-removed effective watermark information block;

the splicing the effective watermark information blocks contained in the target text according to the position information recorded in the effective watermark information blocks to obtain the target watermark information blocks comprises the following steps:

splicing the effective watermark information blocks after the duplication removal contained in the target text according to the position information recorded in the effective watermark information blocks after the duplication removal to obtain initial watermark information blocks;

8. An apparatus for embedding watermark information, the apparatus comprising:

9. An electronic device comprising a processor, a communication interface, a memory, and a communication bus; the processor, the communication interface and the memory complete mutual communication through a bus; the memory is used for storing a computer program; the processor is configured to execute the program stored in the memory, implement the steps of the method for embedding watermark information according to any one of claims 1 to 4, and/or implement the steps of the method for extracting watermark information according to any one of claims 5 to 7.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, implements the steps of the method for embedding watermark information according to any one of claims 1 to 4 and/or implements the steps of the method for extracting watermark information according to any one of claims 5 to 7.