CN110874456B - Watermark embedding method, watermark extracting method, watermark embedding device, watermark extracting device and data processing method - Google Patents

Watermark embedding method, watermark extracting method, watermark embedding device, watermark extracting device and data processing method Download PDF

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CN110874456B
CN110874456B CN201811011176.1A CN201811011176A CN110874456B CN 110874456 B CN110874456 B CN 110874456B CN 201811011176 A CN201811011176 A CN 201811011176A CN 110874456 B CN110874456 B CN 110874456B
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watermark information
carrier
embedding
carrier sub
sub
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CN110874456A (en
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刘永亮
范航宇
田冬
归加琪
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/16—Program or content traceability, e.g. by watermarking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/106—Enforcing content protection by specific content processing
    • G06F21/1063—Personalisation

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  • Computer Security & Cryptography (AREA)
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  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

The application discloses a watermark embedding method, which comprises the following steps: acquiring watermark information to be embedded into a carrier object; determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object; embedding the watermark information into the carrier sub-object. By adopting the method, the problem that the watermark can not resist interception attack in the prior art is solved.

Description

Watermark embedding method, watermark extracting method, watermark embedding device, watermark extracting device and data processing method
Technical Field
The present application relates to digital watermark embedding technology, and in particular, to a watermark embedding method and apparatus, an electronic device, and a storage device. The invention also relates to a watermark extraction method, a watermark extraction device, electronic equipment and storage equipment. The invention also relates to a data processing method.
Background
The modern era is the information era, and office informatization becomes more and more common.
For example, Office, as an Office software suite developed by microsoft corporation, has become almost a global common Office software processing solution. The Office series software is convenient to use, easy to use and use, has a very large user group, and the number of Office documents generated every day is not sufficient. The Office suite mainly comprises three kinds of software, namely Word, PowerPoint and Excel, and document data in an enterprise may contain information with high value. Copyright protection and traceability tracking of such important information becomes very significant. Digital watermarking technology is an effective technology for realizing file copyright protection. By embedding meaningful watermark information into the Office document, the copyright protection of the document can be realized, the document is prevented from being illegally stolen, and if the document is found to be leaked, the tracing can be realized, and the purpose of tracing responsibility can be achieved.
In the prior art, some schemes for embedding watermarks in documents exist, but most of the schemes cannot resist interception attacks, namely if partial segments in the documents are intercepted, watermark information cannot be extracted, and the security of the watermarks cannot be guaranteed.
Therefore, in order to ensure the security of the watermark, the interception attack resistance of the watermark needs to be improved.
Disclosure of Invention
The application provides a watermark embedding method, a watermark embedding device, electronic equipment and storage equipment, and aims to solve the problem that the existing watermark cannot resist interception attack.
The application provides a watermark embedding method, which comprises the following steps:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object.
Optionally, the embedding the watermark information into the carrier object includes:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
And embedding the watermark information into the carrier sub-object in a mode of modifying the content recorded by the carrier object.
Optionally, the embedding the watermark information into the carrier sub-object by using a mode of calling a COM interface includes:
newly building a text box in a display area in the carrier object through a COM interface, and taking the text box as a carrier sub-object;
inserting the watermark information into the text box;
and hiding the text box inserted with the watermark information.
Optionally, newly creating a text box in a display area of a display area in the carrier object through a COM interface, and taking the text box as a carrier child object includes:
newly building a text box at the edge of a display area in the carrier object through a COM interface;
setting the size of the newly-built text box to be minimum, and taking the obtained text box as a carrier sub-object.
Optionally, the embedding the watermark information into the carrier sub-object by modifying the content recorded in the carrier object includes:
decompressing the carrier object by using a decompressing program to obtain a decompressed file;
acquiring a file corresponding to a carrier sub-object from the decompressed file, and embedding watermark information into the file corresponding to the carrier sub-object;
the method further comprises the following steps:
and compressing the decompressed file embedded with the watermark information to obtain the carrier object embedded with the watermark information.
Optionally, the embedding the watermark information into the carrier sub-object by modifying the content recorded in the carrier object includes:
embedding the watermark information into the carrier object as text attribute information; or,
and replacing synonyms in the carrier object according to the watermark information.
Optionally, the text attribute includes at least one of:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
Optionally, the carrier object is a table;
the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes: and taking the specific attribute of the cell as an embedding object, and embedding the watermark information into the attribute information of the cell in the table.
Optionally, the method further includes: converting the watermark information into second watermark information by adopting a scrambling code mode;
the embedding the watermark information into the carrier sub-object comprises: embedding the second watermark information into the carrier sub-object.
The application also provides a watermark extraction method, which comprises the following steps:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
watermark information is extracted from the carrier sub-object.
Optionally, when embedding the watermark information into the carrier sub-object by using a mode of calling a COM interface, extracting the watermark information from the carrier sub-object includes:
watermark information is extracted from the hidden text box.
Optionally, the extracting watermark information from the carrier sub-object includes:
decompressing the carrier object to be extracted with the watermark information by using a decompressing program to obtain a decompressed file;
and finding out a file corresponding to the carrier sub-object embedded with the watermark information from the decompressed file, and extracting the watermark information from the file corresponding to the carrier sub-object.
Optionally, the extracting watermark information from the carrier sub-object includes:
extracting the watermark information from the text attribute of the carrier sub-object; or,
and extracting the watermark information from the synonyms.
Optionally, the text attribute includes at least one of:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
Optionally, the carrier sub-object is a table;
the extracting of the watermark information from the carrier sub-object includes: watermark information is extracted from the attributes of the cells.
Optionally, the extracting watermark information from the carrier sub-object includes: extracting first watermark information from the carrier sub-object; and converting the first watermark information into watermark information by adopting a scrambling code.
The present application also provides a watermark embedding apparatus, comprising:
a watermark information obtaining unit, for obtaining the watermark information to be embedded into the carrier object;
the carrier sub-object determining unit is used for determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
and the watermark information embedding unit is used for embedding the watermark information into the carrier sub-object.
The present application further provides an electronic device, comprising:
a processor; and
a memory for storing a program of a watermark embedding method, the apparatus performing the following steps after being powered on and running the program of the watermark embedding method by the processor:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object.
The present application also provides a storage device storing a program of a watermark embedding method, the program being executed by a processor and performing the steps of:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object.
The present application further provides a watermark extraction apparatus, including:
a carrier object obtaining unit, configured to obtain a carrier object from which watermark information is to be extracted;
a carrier sub-object determining unit, configured to determine at least one carrier sub-object in which watermark information is embedded;
and the watermark information extraction unit is used for extracting watermark information from the carrier sub-object.
The present application further provides an electronic device, comprising:
a processor; and
a memory for storing a program of a watermark extraction method, the apparatus performing the following steps after being powered on and running the program of the watermark embedding method by the processor:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
watermark information is extracted from the carrier sub-object.
The present application also provides a storage device storing a program of a watermark extraction method, the program being executed by a processor and performing the steps of:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
watermark information is extracted from the carrier sub-object.
The present application further provides a data processing method, including:
acquiring a carrier object, wherein the carrier object comprises a data object in which watermark information is to be embedded;
acquiring watermark information, wherein the watermark information comprises an identifier to be embedded into the carrier object;
determining at least one carrier sub-object in the carrier object, wherein the carrier sub-object comprises components of the carrier object, the components comprising character data, format data, multimedia data and/or control data;
embedding the watermark information into the carrier sub-object.
Compared with the prior art, the invention has the following advantages:
the application provides a watermark embedding method, a watermark embedding device, electronic equipment and storage equipment, watermark information is embedded into a plurality of carrier sub-objects in which watermark information is to be embedded, when the carrier object is intercepted and attacked, because the watermark information is embedded into the plurality of carrier sub-objects, the intercepted and taken partial document can retain the watermark information to a great extent, and therefore the interception and attack resistance of the watermark can be improved.
Drawings
Fig. 1 is a flowchart of a watermark embedding method according to a first embodiment of the present application.
Fig. 2 is a schematic diagram of creating a text box at an edge of a display area in a word document through a COM interface according to a first embodiment of the present application.
Fig. 3 is a schematic diagram of setting a new text box to be minimum according to the first embodiment of the present application.
Fig. 4 is a schematic diagram of inserting watermark information into a text box according to the first embodiment of the present application.
Fig. 5 is a schematic diagram of hiding a text box according to the first embodiment of the present application.
Fig. 6 is a schematic diagram of a text display effect before embedding watermark information according to the first embodiment of the present application.
Fig. 7 is a schematic diagram of a text display effect after embedding watermark information according to a first embodiment of the present application.
Fig. 8 is a schematic diagram of embedding watermark information into multiple sub-objects of a carrier object in multiple ways according to the first embodiment of the present application.
Fig. 9 is a flowchart of a watermark extraction method according to a second embodiment of the present application.
Fig. 10 is a schematic diagram of a watermark embedding apparatus according to a third embodiment of the present application.
Fig. 11 is a schematic diagram of an electronic device according to a fourth embodiment of the present application.
Fig. 12 is a schematic diagram of a watermark extraction apparatus according to a sixth embodiment of the present application.
Fig. 13 is a schematic diagram of an electronic device according to a seventh embodiment of the present application.
Fig. 14 is a flowchart of a data processing method according to a ninth embodiment of the present application.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather construed as limited to the embodiments set forth herein.
A first embodiment of the present application provides a watermark embedding method, which is described below with reference to fig. 1.
As shown in fig. 1, in step S101, watermark information that needs to be embedded in the carrier object is obtained.
The carrier object refers to a data object in which watermark information needs to be embedded. The carrier object refers to a digital carrier, such as Office documents, web page data and the like of Microsoft corporation products; the Office document comprises Word, PowerPoint, Excel and the like. According to at least one embodiment of the present invention, the digital carrier includes various types of documents, and the method provided by the present application is not limited to a specific document category/file category.
The watermark information refers to an identifier to be embedded into the carrier object. For example, the watermark information may be visible, alerting the user to the relevant privacy and authority; for another example, the watermark information can be embedded in the carrier object in a hidden way, so that the use value of the original carrier object is not influenced, and the watermark information is not easy to be detected and modified again. But the watermark information can be identified and recognized by the producer. The watermark information hidden in the carrier can achieve the purposes of confirming content creators and purchasers, transmitting secret information, judging whether the carrier object is tampered or not and the like. The watermark information may be a company name of a certain company, or may be an employee number or other identification information of a certain employee.
As shown in fig. 1, in step S102, at least one carrier sub-object in the carrier objects, in which watermark information is to be embedded, is determined.
The carrier sub-object refers to a component of the carrier object. The types of carrier sub-objects include: character data, format data such as text boxes and tables, multimedia data such as pictures, audio and video, and control data such as buttons and menus. For example, a word document, a carrier sub-object includes: pictures, character data, text boxes, etc. in word documents.
In order to make the carrier object resistant to interception attack, a plurality of carrier sub-objects in which watermark information is to be embedded in the carrier object may be determined, for example, the carrier object is a word document, and a plurality of pictures, character data, and text boxes in the word document may be selected as the carrier sub-objects.
As shown in fig. 1, in step S103, the watermark information is embedded into the carrier sub-object.
The embedding the watermark information into the carrier object includes:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
And embedding the watermark information into the carrier sub-object in a mode of modifying the content recorded by the carrier object.
The embedding the watermark information into the carrier sub-object by calling the COM interface comprises the following steps:
newly building a text box in a display area in the carrier object through a COM interface, and taking the text box as a carrier sub-object;
inserting the watermark information into the text box;
and hiding the text box inserted with the watermark information.
Creating a text box in a display area of a display area in the carrier object through the COM interface, and taking the text box as a carrier sub-object, including:
newly building a text box at the edge of a display area in the carrier object through a COM interface;
setting the size of the newly-built text box to be minimum, and taking the obtained text box as a carrier sub-object.
For example, the carrier object is a word document, a text box is newly created in the upper left corner of the display area in the word document through the COM interface (as shown in fig. 2) and is set to be minimum (as shown in fig. 3), watermark information is inserted into the text box (as shown in fig. 4), and then the text box is hidden by using the "select- > hide" function (as shown in fig. 5).
And embedding the watermark information into the carrier sub-object by calling a COM (component object model) interface, wherein the carrier object can resist the attack of full-selection copying and partial deletion.
The embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
decompressing the carrier object by using a decompressing program to obtain a decompressed file;
acquiring a file corresponding to a carrier sub-object from the decompressed file, and embedding watermark information into the file corresponding to the carrier sub-object;
the method further comprises the following steps:
and compressing the decompressed file embedded with the watermark information to obtain the carrier object embedded with the watermark information.
The above method can be used when the type of the carrier sub-object is picture, audio or video.
For example, the carrier sub-object is a picture in an office file, and the watermark information is embedded into the carrier sub-object by modifying the content recorded in the carrier object, which includes the following specific steps: firstly, decompressing an original file by using a decompressing program (if the original file is an office file of 03 edition, the original file needs to be converted into a file of more than 07 edition), then finding an image file corresponding to a picture in the office file, and then embedding watermark information into the image file by using an embedding method of digital image watermark. After the embedding is finished, the file which is released is compressed to generate an Office file format (if the file is an Office file of 03 edition, the file of 07 edition needs to be converted back to 03 edition). This example can resist attacks on picture copying.
The example of watermark embedding for types of carrier sub-objects being video and audio is similar to the example of watermark embedding for types of carrier sub-objects being pictures. By adopting the watermark embedding method for embedding the watermark information into the carrier sub-object by adopting the mode of modifying the content recorded by the carrier object, the watermark extraction can be carried out on the video and audio copying condition. The watermark information is embedded into the multimedia file (video, audio, etc.), so that the copyright of the multimedia file can be protected, and the copyright protection can be provided for the document containing the multimedia file.
The embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
and replacing synonyms in the carrier sub-objects according to the watermark information.
The above method can be used when the type of the carrier sub-object is character data, a text box or a table.
And the watermark information is embedded into the carrier sub-object as text attribute information, which means that the watermark information is converted into characters with certain imperceptible attribute and is embedded into the carrier sub-object. The text attributes include: the font size of the characters; the spacing of the words; character phonetic notation alignment mode and the like. For example, the text attribute is the font size of the character, the 5 th character and the 5.5 th character are not easily perceived by naked eyes, and the 5 th character can be represented as embedded information 0, and the 5.5 th character can be represented as embedded information 1. As shown in fig. 6, "this is a line of example characters" before embedding, and each character has the same size, fig. 7 is a diagram after embedding information "101010101", a character No. 5.5 indicates that the embedded information is 1, and a character No. 5 indicates that the embedded information is 0. Such methods are numerous and will not be described in detail.
And replacing synonyms in the carrier sub-objects according to the watermark information, so that infringement means such as copying and pasting, photographing and the like of the carrier objects can be resisted.
The method for replacing synonyms in the carrier sub-objects according to the watermark information belongs to a content-based information embedding method, and encoding and decoding can be carried out by using a compared synonym dictionary. For example, the synonym pair "morning-morning", where "morning" represents embedded information 0 and "morning" represents embedded information 1, embeds watermark information into the carrier sub-object by retrieving and replacing the "morning" and "morning" that appear in the literal.
It can be seen that when the watermark information is embedded into the same type of carrier sub-objects in the carrier object, different embedding manners may be adopted, for example, for a character data carrier sub-object, a manner of embedding the watermark information into the carrier sub-object as text attribute information or a manner of replacing synonyms in the carrier sub-object according to the watermark information may be adopted.
When the carrier object is a table; the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes: and taking the attributes of the cells as carrier sub-objects, and embedding the watermark information into the attribute information of the cells in the table.
When the carrier object is a table (e.g., an Excel table), some attributes of each cell can be regarded as an embedded object, for example, a ZhuYin mode, in addition to a mode of embedding watermark information as text attribute information into the table. The ZhuYin of a cell is typically rarely used, and can provide three options: left alignment, centering, and right alignment, and when embedding the watermark information, the left alignment may be used as embedded information 0, and the right alignment may be used as embedded information 1.
The way of embedding the watermark information into the attribute information of the cells in the table can resist interception attack and partial deletion attack of the table.
Before embedding the watermark information into the carrier sub-object, converting the watermark information into second watermark information by adopting a scrambling code mode; and then embedding the second watermark information into the carrier sub-object.
For example, assuming that watermark information to be embedded is "ABCD", the character string S is first converted into a hexadecimal ASCII character string S1, and "ABCD" becomes a character string "41424344"; then, the sequence of S1 is scrambled by the chaotic sequence to obtain a new character string S2, and if the scrambling code is '123' and the sequence of the generated chaotic sequence is '76345218', the new sequence S2 becomes '43424144'. The information to be embedded S2 is the second watermark information, i.e., "43424144", and "123" is finally retained as key information and provided to the watermark extraction side.
The scrambled password is provided for the watermark information extraction end, and two modes can be adopted: one way is that: sending the scrambling code to a watermark information extraction end in a form of a single message; the other mode is as follows: the scrambling code is determined in a mode predetermined by a watermark information extraction end and a watermark information embedding end.
Now, a detailed description is given of an implementation of the watermark embedding method provided in the first embodiment of the present application. The method and the device have the advantages that the watermark information is embedded into the plurality of sub-objects of the carrier object in a plurality of ways (as shown in figure 8), so that the attack of screenshot, copying and partial deletion can be resisted, and the safety problem of the watermark embedded into the carrier object is solved.
A second embodiment of the present application provides a watermark extraction method corresponding to the watermark embedding method provided in the first embodiment of the present application, and is described below with reference to fig. 9.
As shown in fig. 9, in step S901, a carrier object from which watermark information is to be extracted is obtained.
The carrier object to be extracted with the watermark information refers to a data object in which the watermark information is embedded by the watermark embedding method provided in the first embodiment of the present application. The carrier object includes: office documents, web page data and the like which are products of Microsoft corporation; the Office document comprises Word, PowerPoint, Excel and the like. The carrier object to be subjected to watermark information extraction may be a complete carrier object embedded with the watermark, or may be a part of the carrier object embedded with the watermark (obtained after intercepting the carrier object), for example, the complete carrier object embedded with the watermark is a word document 1, and a word document 2 is generated by copying partial content of the word document 1, so that the document 2 may be the carrier object to be subjected to watermark information extraction, which is a part of the carrier object embedded with the watermark.
As shown in fig. 9, in step S902, at least one carrier sub-object in which watermark information is embedded is determined.
The carrier sub-object refers to a component of the carrier object. The types of carrier sub-objects include: character data, format data such as text boxes and tables, multimedia data such as pictures, audio and video, and control data such as buttons and menus. For example, a word document, a carrier sub-object includes: pictures, character data, text boxes, etc. in word documents.
As shown in fig. 9, in step S903, watermark information is extracted from the carrier sub-object.
When embedding the watermark information into the carrier sub-object by adopting a mode of calling a COM interface, extracting the watermark information from the carrier sub-object comprises the following steps:
watermark information is extracted from the hidden text box.
The extracting of the watermark information from the carrier sub-object includes:
decompressing the carrier object to be extracted with the watermark information by using a decompressing program to obtain a decompressed file;
and finding out a file corresponding to the carrier sub-object embedded with the watermark information from the decompressed file, and extracting the watermark information from the file corresponding to the carrier sub-object.
The above method can be used when the type of the carrier sub-object is picture, audio or video.
The extracting of the watermark information from the carrier sub-object includes:
extracting the watermark information from the text attribute of the carrier sub-object; or,
and extracting the watermark information from the synonyms.
The text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
For example, the text attribute is the font size of the character, the 5 th character and the 5.5 th character are not easily perceived by naked eyes, the 5 th character represents that the embedded information is 0, and the 5.5 th character represents that the embedded information is 1; then, at the time of extraction, the character No. 5 indicates that the extracted information is 0, and the character No. 5.5 indicates that the extracted information is 1.
For example, the synonym pair "morning-morning", where "morning" represents embedded information 0 and "morning" represents embedded information 1, and if the extracted synonym is "morning", it represents extracted information as "0" and the extracted synonym is "morning", it represents extracted information as "1".
When the carrier sub-object is a table; the extracting of the watermark information from the carrier sub-object includes: watermark information is extracted from the attributes of the cells.
The extracting of the watermark information from the carrier sub-object includes: extracting first watermark information from the carrier sub-object; and converting the first watermark information into watermark information by adopting a scrambling code.
Following the example of the first embodiment of the present application, the first watermark information "43424144" is extracted from the carrier sub-object, the chaotic sequence is generated with the scrambling code "123", the sequence of the chaotic sequence is "76345218", the first watermark information is scrambled by the chaotic sequence to obtain the character string "41424344", and finally the character string is converted into the watermark information "ABCD".
Corresponding to the above-mentioned watermark embedding method, a third embodiment of the present application further provides a watermark embedding apparatus.
As shown in fig. 10, the watermark embedding apparatus includes:
a watermark information obtaining unit 1001 configured to obtain watermark information to be embedded in a carrier object;
a carrier sub-object determining unit 1002, configured to determine at least one carrier sub-object in which watermark information is to be embedded;
a watermark information embedding unit 1003, configured to embed the watermark information into the carrier sub-object.
Optionally, the watermark information embedding unit includes:
the COM interface embedding subunit is used for embedding the watermark information into the carrier sub-object in a mode of calling a COM interface; and/or
And the modified content embedding sub-unit is used for embedding the watermark information into the carrier sub-object in a mode of modifying the content recorded by the carrier object.
Optionally, the COM interface embedding subunit includes:
a text box creating subunit, configured to create a text box in the display area of the carrier object through a COM interface, and use the text box as a carrier child object;
an insert watermark information subunit, configured to insert the watermark information into the text box;
and the text box hiding subunit is used for hiding the text box inserted with the watermark information.
Optionally, the text box new subunit is specifically configured to:
newly building a text box at the edge of a display area in the carrier object through a COM interface;
setting the size of the newly-built text box to be minimum, and taking the obtained text box as a carrier sub-object.
Optionally, the modified content embedding subunit is specifically configured to:
decompressing the carrier object by using a decompressing program to obtain a decompressed file;
acquiring a file corresponding to a carrier sub-object from the decompressed file, and embedding watermark information into the file corresponding to the carrier sub-object;
the device further comprises:
and the file compression unit is used for compressing the decompressed file embedded with the watermark information to obtain the carrier object embedded with the watermark information.
Optionally, the modified content embedding subunit is specifically configured to:
embedding the watermark information into the carrier sub-object as text attribute information; or,
and replacing synonyms in the carrier sub-objects according to the watermark information.
Optionally, the text attribute includes at least one of:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
Optionally, the carrier object is a table;
the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes: and taking the attributes of the cells as carrier sub-objects, and embedding the watermark information into the attribute information of the cells in the table.
Optionally, the apparatus further comprises: the second watermark information conversion unit is used for converting the watermark information into second watermark information in a scrambling code mode;
the watermark information embedding unit is specifically configured to: embedding the second watermark information into the carrier sub-object.
It should be noted that, for the detailed description of the watermark embedding apparatus provided in the third embodiment of the present application, reference may be made to the related description of the first embodiment of the present application, and details are not described here again.
Corresponding to the watermark embedding method provided above, a fourth embodiment of the present application further provides an electronic device.
As shown in fig. 11, the electronic apparatus includes:
a processor 1101; and
a memory 1102 for storing a program of a watermark embedding method, the apparatus performing the following steps after being powered on and running the program of the watermark embedding method by the processor:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object.
Optionally, the embedding the watermark information into the carrier object includes:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
And embedding the watermark information into the carrier sub-object in a mode of modifying the content recorded by the carrier object.
Optionally, the embedding the watermark information into the carrier sub-object by using a mode of calling a COM interface includes:
newly building a text box in a display area in the carrier object through a COM interface, and taking the text box as a carrier sub-object;
inserting the watermark information into the text box;
and hiding the text box inserted with the watermark information.
Optionally, newly creating a text box in a display area of a display area in the carrier object through a COM interface, and taking the text box as a carrier child object includes:
newly building a text box at the edge of a display area in the carrier object through a COM interface;
setting the size of the newly-built text box to be minimum, and taking the obtained text box as a carrier sub-object.
Optionally, the embedding the watermark information into the carrier sub-object by modifying the content recorded in the carrier object includes:
decompressing the carrier object by using a decompressing program to obtain a decompressed file;
acquiring a file corresponding to a carrier sub-object from the decompressed file, and embedding watermark information into the file corresponding to the carrier sub-object;
the electronic device further performs the steps of:
and compressing the decompressed file embedded with the watermark information to obtain the carrier object embedded with the watermark information.
Optionally, the embedding the watermark information into the carrier sub-object by modifying the content recorded in the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
and replacing synonyms in the carrier sub-objects according to the watermark information.
Optionally, the text attribute includes at least one of:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
Optionally, the carrier object is a table;
the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes: and taking the attributes of the cells as carrier sub-objects, and embedding the watermark information into the attribute information of the cells in the table.
Optionally, the electronic device further performs the following steps: converting the watermark information into second watermark information by adopting a scrambling code mode;
the embedding the watermark information into the carrier sub-object comprises: embedding the second watermark information into the carrier sub-object.
It should be noted that, for the detailed description of the electronic device provided in the fourth embodiment of the present application, reference may be made to the related description of the first embodiment of the present application, and details are not repeated here.
In correspondence with one of the watermark embedding methods provided above, a fifth embodiment of the present application also provides a storage device,
a program storing a watermark embedding method, the program being executed by a processor to perform the steps of:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object.
It should be noted that, for the detailed description of the storage device provided in the fifth embodiment of the present application, reference may be made to the related description of the first embodiment of the present application, and details are not described here again.
Corresponding to the above-mentioned watermark extraction method, a sixth embodiment of the present application further provides a watermark extraction apparatus.
As shown in fig. 12, the watermark extraction apparatus includes:
a carrier object obtaining unit 1201, configured to obtain a carrier object from which watermark information is to be extracted;
a carrier sub-object determining unit 1202, configured to determine at least one carrier sub-object in which watermark information is embedded in the carrier object;
a watermark information extraction unit 1203 is configured to extract watermark information from the carrier sub-object.
Optionally, the watermark information extracting unit is specifically configured to:
and when the watermark information is embedded into the carrier sub-object by calling the COM interface, extracting the watermark information from the hidden text box.
Optionally, the watermark information extracting unit is specifically configured to:
decompressing the carrier object to be extracted with the watermark information by using a decompressing program to obtain a decompressed file;
and finding out a file corresponding to the carrier sub-object embedded with the watermark information from the decompressed file, and extracting the watermark information from the file corresponding to the carrier sub-object.
Optionally, the watermark information extracting unit is specifically configured to:
extracting the watermark information from the text attribute of the carrier sub-object; or,
and extracting the watermark information from the synonyms.
Optionally, the text attribute includes at least one of:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
Optionally, the carrier sub-object is a table;
the watermark information extraction unit is specifically configured to: watermark information is extracted from the attributes of the cells.
Optionally, the watermark information extracting unit is specifically configured to: extracting first watermark information from the carrier sub-object; and converting the first watermark information into watermark information by adopting a scrambling code.
It should be noted that, for the detailed description of the watermark extraction apparatus provided in the sixth embodiment of the present application, reference may be made to the related description of the second embodiment of the present application, and details are not described here again.
A seventh embodiment of the present application further provides an electronic device corresponding to the above-mentioned watermark extraction method.
As shown in fig. 13, the electronic apparatus includes:
a processor 1301; and
a memory 1302 for storing a program of a watermark extraction method, the apparatus being powered on and executing the program of the watermark embedding method by the processor, and performing the following steps:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
watermark information is extracted from the carrier sub-object.
Optionally, when embedding the watermark information into the carrier sub-object by using a mode of calling a COM interface, extracting the watermark information from the carrier sub-object includes:
watermark information is extracted from the hidden text box.
Optionally, the extracting watermark information from the carrier sub-object includes:
decompressing the carrier object to be extracted with the watermark information by using a decompressing program to obtain a decompressed file;
and finding out a file corresponding to the carrier sub-object embedded with the watermark information from the decompressed file, and extracting the watermark information from the file corresponding to the carrier sub-object.
Optionally, the extracting watermark information from the carrier sub-object includes:
extracting the watermark information from the text attribute of the carrier sub-object; or,
and extracting the watermark information from the synonyms.
Optionally, the text attribute includes at least one of:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
Optionally, the carrier sub-object is a table;
the extracting of the watermark information from the carrier sub-object includes: watermark information is extracted from the attributes of the cells.
Optionally, the extracting watermark information from the carrier sub-object includes: extracting first watermark information from the carrier sub-object; and converting the first watermark information into watermark information by adopting a scrambling code.
It should be noted that, for the detailed description of the electronic device provided in the seventh embodiment of the present application, reference may be made to the related description of the second embodiment of the present application, and details are not described here again.
In correspondence with one of the watermark extraction methods provided above, an eighth embodiment of the present application also provides a storage device,
a program storing a watermark extraction method, the program being executed by a processor to perform the steps of:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
watermark information is extracted from the carrier sub-object.
It should be noted that, for the detailed description of the storage device provided in the eighth embodiment of the present application, reference may be made to the related description of the second embodiment of the present application, and details are not described here again.
A ninth embodiment of the present application provides a data processing method, which is described below with reference to fig. 14.
As shown in fig. 14, in step 1401, a carrier object is obtained, wherein the carrier object comprises a data object to be embedded with watermark information.
As shown in fig. 14, in step 1402, watermark information is obtained, wherein the watermark information comprises an identification to be embedded into the carrier object.
As shown in fig. 14, in step 1403 at least one of the carrier sub-objects is determined, wherein the carrier sub-object comprises a component of the carrier object, the component comprising character data, format data, multimedia data and/or control data.
As shown in fig. 14, in step 1404, the watermark information is embedded into the carrier sub-object.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that the scope of the present invention is not limited to the embodiments described above, and that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention.
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, computer readable media does not include non-transitory computer readable media (transient media), such as modulated data signals and carrier waves.
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.

Claims (19)

1. A watermark embedding method, comprising:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object, comprising:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
2. The method according to claim 1, wherein the embedding the watermark information into the carrier sub-object by calling a COM interface comprises:
newly building a text box in a display area in the carrier object through a COM interface, and taking the text box as a carrier sub-object;
inserting the watermark information into the text box;
and hiding the text box inserted with the watermark information.
3. The method according to claim 2, wherein creating a text box in the display area of the display area in the carrier object through a COM interface, and using the text box as a carrier sub-object comprises:
newly building a text box at the edge of a display area in the carrier object through a COM interface;
setting the size of the newly-built text box to be minimum, and taking the obtained text box as a carrier sub-object.
4. The method according to claim 1, wherein said embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object comprises:
decompressing the carrier object by using a decompressing program to obtain a decompressed file;
acquiring a file corresponding to a carrier sub-object from the decompressed file, and embedding watermark information into the file corresponding to the carrier sub-object;
the method further comprises the following steps:
and compressing the decompressed file embedded with the watermark information to obtain the carrier object embedded with the watermark information.
5. The method of claim 1, wherein the carrier object is a table;
the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes: and taking the attributes of the cells as carrier sub-objects, and embedding the watermark information into the attribute information of the cells in the table.
6. The method of claim 1, further comprising: converting the watermark information into second watermark information by adopting a scrambling code mode;
the embedding the watermark information into the carrier sub-object comprises: embedding the second watermark information into the carrier sub-object.
7. A watermark extraction method, comprising:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
extracting watermark information from the carrier sub-object;
the carrier sub-object embedded with the watermark information is used for embedding the watermark information into the carrier sub-object by calling a COM (component object model) interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
8. The method of claim 7,
when embedding the watermark information into the carrier sub-object by calling a COM interface, extracting the watermark information from the carrier sub-object includes:
watermark information is extracted from the hidden text box.
9. The method of claim 7, wherein the extracting watermark information from the carrier sub-object comprises:
decompressing the carrier object to be extracted with the watermark information by using a decompressing program to obtain a decompressed file;
and finding out a file corresponding to the carrier sub-object embedded with the watermark information from the decompressed file, and extracting the watermark information from the file corresponding to the carrier sub-object.
10. The method of claim 7, wherein the extracting watermark information from the carrier sub-object comprises:
extracting the watermark information from the text attribute of the carrier sub-object; or,
and extracting the watermark information from the synonyms.
11. The method of claim 7, wherein the carrier sub-object is a table;
the extracting of the watermark information from the carrier sub-object includes: watermark information is extracted from the attributes of the cells.
12. The method of claim 7, wherein the extracting watermark information from the carrier sub-object comprises: extracting first watermark information from the carrier sub-object; and converting the first watermark information into watermark information by adopting a scrambling code.
13. A watermark embedding apparatus, comprising:
a watermark information obtaining unit, for obtaining the watermark information to be embedded into the carrier object;
the carrier sub-object determining unit is used for determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
a watermark information embedding unit for embedding the watermark information into the carrier sub-object, comprising:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
14. An electronic device, comprising:
a processor; and
a memory for storing a program of a watermark embedding method, the apparatus performing the following steps after being powered on and running the program of the watermark embedding method by the processor:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object, comprising:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
15. A storage device, characterized in that,
a program storing a watermark embedding method, the program being executed by a processor to perform the steps of:
acquiring watermark information to be embedded into a carrier object;
determining at least one carrier sub-object in which watermark information is to be embedded in the carrier object;
embedding the watermark information into the carrier sub-object, comprising:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
16. A watermark extraction apparatus, comprising:
a carrier object obtaining unit, configured to obtain a carrier object from which watermark information is to be extracted;
a carrier sub-object determining unit, configured to determine at least one carrier sub-object in which watermark information is embedded;
a watermark information extraction unit for extracting watermark information from the carrier sub-object;
the carrier sub-object embedded with the watermark information is used for embedding the watermark information into the carrier sub-object by calling a COM (component object model) interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
17. An electronic device, comprising:
a processor; and
a memory for storing a program of a watermark extraction method, the apparatus performing the following steps after being powered on and running the program of the watermark embedding method by the processor:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
extracting watermark information from the carrier sub-object;
the carrier sub-object embedded with the watermark information is used for embedding the watermark information into the carrier sub-object by calling a COM (component object model) interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
18. A storage device, characterized in that,
a program storing a watermark extraction method, the program being executed by a processor to perform the steps of:
obtaining a carrier object of watermark information to be extracted;
determining at least one carrier sub-object in the carrier object, wherein the watermark information is embedded in the carrier sub-object;
extracting watermark information from the carrier sub-object;
the carrier sub-object embedded with the watermark information is used for embedding the watermark information into the carrier sub-object by calling a COM (component object model) interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
19. A data processing method, comprising:
acquiring a carrier object, wherein the carrier object comprises a data object in which watermark information is to be embedded;
acquiring watermark information, wherein the watermark information comprises an identifier to be embedded into the carrier object;
determining at least one carrier sub-object in the carrier object, wherein the carrier sub-object comprises components of the carrier object, the components comprising character data, format data, multimedia data and/or control data;
embedding the watermark information into the carrier sub-object, comprising:
embedding the watermark information into the carrier sub-object by calling a COM interface; and/or
Embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object;
wherein, the embedding the watermark information into the carrier sub-object by modifying the content recorded by the carrier object includes:
embedding the watermark information into the carrier sub-object as text attribute information; or,
replacing synonyms in the carrier sub-objects according to the watermark information;
the text attribute comprises at least one of the following:
the font size of the characters; the spacing of the words; character phonetic notation alignment mode.
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