CN110378829A - Information provides and the method, device and equipment of watermark extracting - Google Patents

Information provides and the method, device and equipment of watermark extracting Download PDF

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Publication number
CN110378829A
CN110378829A CN201810329642.4A CN201810329642A CN110378829A CN 110378829 A CN110378829 A CN 110378829A CN 201810329642 A CN201810329642 A CN 201810329642A CN 110378829 A CN110378829 A CN 110378829A
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China
Prior art keywords
information
watermark
description
watermark information
channel
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Granted
Application number
CN201810329642.4A
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Chinese (zh)
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CN110378829B (en
Inventor
刘永亮
王兵
郑杰骞
陆哲明
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN201810329642.4A priority Critical patent/CN110378829B/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0021—Image watermarking
    • G06T1/005—Robust watermarking, e.g. average attack or collusion attack resistant
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00—General purpose image data processing
    • G06T2201/005—Image watermarking
    • G06T2201/0065—Extraction of an embedded watermark; Reliable detection

Abstract

This application discloses a kind of information providing methods, which comprises determines that the description information of watermark information, the description information of the watermark information are used to describe the attribute information of watermark information；The description information of the watermark information is supplied to watermark extracting end.Using the above method, solve the problems, such as that the prior art cannot efficiently extract out watermark information in some cases.

Description

Information provides and the method, device and equipment of watermark extracting
Technical field
This application involves field of computer technology, and in particular to a kind of information providing method, device, electronic equipment and storage Equipment.The application is related to method, apparatus, electronic equipment and the storage equipment of a kind of watermark extracting simultaneously.
Background technique
In the company of data-driven business, data are valuable and important assets.The leakage of data may give enterprise The consequence for bringing economic loss and reputation to decline, in some instances it may even be possible to the disastrous effect of bringing on a disaster property.Therefore, data safety is for enterprise It is vital.Information hiding (digital watermark is a kind of Information Hiding Techniques) is the technology traced for leaking data, is The last one link of data safety system, it to track leaking data person after data leak, thus The leaking data of malice can be deterred.
Under the prior art, the cover object of watermark information is embedded in after being subjected to various intentionally or accidentally attacks, frequent occurrence The case where watermark information cannot be efficiently extracted out.Therefore, how to efficiently extract out watermark information is problem to be solved.
Summary of the invention
The application provides a kind of information providing method, cannot be efficiently extracted out with solving the prior art in some cases The problem of watermark information.
The described method includes:
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute letter of watermark information Breath；
The description information of the watermark information is supplied to watermark extracting end.
Optionally, the description information by the watermark information is supplied to watermark extracting end, comprising:
The description information of the watermark information is sent to watermark extracting end in the form of single message；Alternatively,
The description information of the watermark information is embedded into cover object.
Optionally, the description information by the watermark information is embedded into cover object, comprising:
The description information of the watermark information is embedded into cover object by least one channel, the channel refers to The mode of the description information of watermark information is embedded in cover object.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information is embedded into cover object at least once by a channel；Alternatively,
The description information of the watermark information is repeatedly embedded into cover object by multiple channels.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information is divided into multiple description sub-informations；
The multiple description sub-information is embedded into cover object by multiple and different channels.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information and the watermark information are embedded into cover object by the same channel.
Optionally, the method also includes:
It is determined according to the feature of the type of cover object and/or the description information of watermark information for being embedded in watermark information The channel of description information.
Optionally, the description information of the watermark information includes following at least one information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information insertion starts identification information；
The number of watermark information redundant embedding in the channel.
Optionally, further includes: the channel information used when the description information that will be embedded in watermark information is supplied to watermark extracting End；Alternatively,
It is described that the description information of the watermark information is embedded into cover object by least one channel, comprising: logical It crosses at least one channel made an appointment with watermark extracting end the description information of the watermark information is embedded into cover object.
The application also provides a kind of method of watermark extracting, which comprises
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute letter of watermark information Breath；
Description information based on watermark information, extracts watermark information from cover object.
Optionally, the description information for obtaining watermark information, comprising:
Obtain the description information for the watermark information that watermark built-in end is provided in the form of single message；Alternatively,
The description information of watermark information is extracted from cover object.
Optionally, the description information that watermark information is extracted from cover object, comprising:
The description information of the watermark information in insertion cover object is extracted from least one channel, the channel refers to The mode of the description information of watermark information is embedded in cover object.
Optionally, the description information that the watermark information in insertion cover object is extracted from least one channel, Include:
The description information for the watermark information being embedded into cover object at least once is extracted from a channel；Alternatively,
The description information for the watermark information being repeatedly embedded into cover object is extracted from multiple channels.
Optionally, the description information that the watermark information in insertion cover object is extracted from least one channel, Include:
The multiple description sub-informations being embedded into cover object are extracted from multiple and different channels；
By the description information of watermark information described in the multiple description sub-information combination producing.
Optionally, based on the description information of watermark information, watermark information is extracted from cover object, comprising:
The description information and watermark letter of the watermark information being embedded into cover object are extracted from the same channel Breath.
Optionally, the description information of the watermark information includes following at least one information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information insertion starts identification information；
The number of watermark information redundant embedding in the channel.
Optionally, further includes:
Obtain the channel information that the description information for the watermark information that watermark built-in end provides uses；Alternatively,
It is described from least one channel extract insertion cover object in the watermark information description information include: from At least one channel that watermark built-in end is made an appointment obtains the description information of the watermark information.
The application also provides a kind of information provider unit, and described device includes:
Description information determination unit, for determining that the description information of watermark information, the description information of the watermark information are used In the attribute information of description watermark information；
Description information provides unit, for the description information of the watermark information to be supplied to watermark extracting end.
The application also provides a kind of device of watermark extracting, and described device includes:
Description information acquiring unit, for obtaining the description information of watermark information, the description information of the watermark information is used In the attribute information of description watermark information；
Watermark information extraction unit extracts watermark information for the description information based on watermark information from cover object.
The application also provides a kind of electronic equipment, comprising:
Processor；And
Memory, for the program of information providing method, which is powered and runs the information by the processor and mention After the program of method, following step is executed:
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute letter of watermark information Breath；
The description information of the watermark information is supplied to watermark extracting end.
The application also provides a kind of electronic equipment, comprising:
Processor；And
Memory, for the program of watermark extracting method, which is powered and runs the watermark by the processor and mention After taking the program of method, following step is executed:
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute letter of watermark information Breath；
Description information based on watermark information, extracts watermark information from cover object.
The application also provides a kind of storage equipment,
It is stored with the program for storing information providing method, which is run by processor, execute following step:
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute letter of watermark information Breath；
The description information of the watermark information is supplied to watermark extracting end.
The application also provides a kind of storage equipment, which is characterized in that
It is stored with the program for storing watermark extracting method, which is run by processor, execute following step:
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute letter of watermark information Breath；
Description information based on watermark information, extracts watermark information from cover object.
Compared with prior art, the invention has the following advantages that
Information providing method provided by the present application, device, electronic equipment, by determining the description information of watermark information, and And the description information of the watermark information is supplied to watermark extracting end, it ensure that insertion carrier pair is accurately extracted at watermark extracting end The watermark information of elephant.
The method, apparatus of watermark extracting provided by the present application, electronic equipment obtain the description information of watermark information first, The description information of the watermark information is used to describe the attribute information of watermark information；It is then based on the description information of watermark information, Watermark information is extracted from cover object.It is the description letter based on watermark information due to extracting watermark information from cover object Breath, therefore can accurately extract the watermark information of insertion cover object.
Detailed description of the invention
Fig. 1 is a kind of flow chart for information providing method that the application first embodiment provides.
Fig. 2 is a kind of flow chart of the description information for determining watermark information that the application first embodiment provides.
Fig. 3 is the document screenshot before the insertion watermark description information that the application first embodiment provides and watermark information.
Fig. 4 is the document screenshot after the insertion watermark description information that the application first embodiment provides and watermark information.
Fig. 5 is a kind of flow chart of the method for watermark extracting that the application second embodiment provides.
Fig. 6 is a kind of schematic diagram for information provider unit that the application 3rd embodiment provides.
Fig. 7 is a kind of schematic diagram for watermark extraction apparatus that the application fourth embodiment provides.
Fig. 8 is the schematic diagram for a kind of electronic equipment that the 5th embodiment of the application provides.
Fig. 9 is the schematic diagram for another electronic equipment that the application sixth embodiment provides.
Specific embodiment
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.But the present invention can be with Much it is different from other way described herein to implement, those skilled in the art can be without prejudice to intension of the present invention the case where Under do similar popularization, therefore the present invention is not limited to the specific embodiments disclosed below.
The application first embodiment provides a kind of information providing method.It is carried out below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4 detailed It describes in detail bright.
As shown in Figure 1, in step s101, determining the description information of watermark information, the description information of the watermark information For describing the attribute information of watermark information.
The watermark information refers to that the additional information being added in cover object, additional information have specific meaning.It is described Cover object can be word document, PDF document, Excel file etc..The suitable watermark information being added in cover object, The safety of data is protected in the leakage that can prevent data, can be with for example, copyright information is added in word document as watermark Prevent piracy.
The description information of the watermark information is used to describe the attribute information of watermark information.The description of the watermark information is believed Breath may include: the length of watermark information；It is embedded in channel；Watermark information is embedded in end of identification information；Watermark information insertion starts Identification information；The number etc. of watermark information redundant embedding in the channel.
One of watermark end of identification acts on, and the bit before end of identification is out of joint, the bit after end of identification It can also use.
In addition, if end of identification and the actually useful peculiar conflict of ratio, see that subsequent end of identification is this, If so, proving that this end of identification is pair.
The length of the watermark information can refer to the number of bits that watermark information includes after encoding to watermark information； For example, watermark information is bit sequence " 0111101100 ", the length of watermark information is just 10 bits.
The channel can refer to the mode that watermark information is embedded in cover object, can also refer to and be embedded in cover object The mode of the description information of watermark information, therefore insertion channel can refer to the channel of insertion watermark information, can also refer to insertion water The channel of the description information of official seal breath.It is related to the type of cover object to be embedded in channel, for example, character can be used in word document The various ways such as color, character pitch, character position lifting, character boundary carry out watermark information insertion；Be embedded in channel also with it is embedding The feature for entering the watermark information of cover object or the description information of watermark information is related.
As one embodiment, the channel can refer to the description that watermark information or watermark information are embedded in cover object The position of information and the means of insertion, for example, in a word document, according to certain character pitch in a paragraph It is embedded in the description information or watermark information of watermark information, also according to certain character pitch or according to it in another paragraph The description information or watermark information of his form insertion watermark information, the two paragraphs and the embedded mode used respectively can divide It is not considered as two different channels.
The watermark information is embedded in end of identification information, can refer to that single watermark information is embedded in end of identification information.In water The purpose that watermark information insertion end mark information is added in the description information of official seal breath is to maintain the synchronizing information of watermark information. For example, at some channel watermark information redundant embedding 5 times, but the data in the channel are deleted a part (or corresponding diagram The shearing or translation of picture).If the watermark of subsequent redundant embedding will be believed without the end mark of each watermark insertion Breath loses synchronizing information, it is likely that will lead to extraction and fall flat as currently embedded watermark information.Watermark information is added Being embedded in end mark information can be to avoid this mistake.If the watermark information length of single insertion is 100 bits, single Secondary watermark insertion end mark information is the bit sequence of continuous 16 0 (probability of conflict is 10 a ten thousandth points five, very small) Column, i.e., " 0000 | | 0000 | | 0000 | | 0000 ", before encountering continuous 16 0, if the amount of bits extracted is less than 100 Bit is considered as data and is destroyed, and just abandons the watermark information currently extracted.And after 16 0, restart to mention It takes.
It should be noted that in some cases, watermark information is embedded in end of identification and actually useful watermark information Bit sequence may be identical, current to determine if the bit sequence currently extracted is identical as watermark information insertion end of identification Whether the bit sequence of extraction is watermark information insertion end of identification, it can be determined that positioned at the length of the watermark information of single insertion The subsequent bit sequence of bit whether be watermark information insertion end of identification, if so, determining the bit sequence currently extracted It is classified as actually useful watermark information, the length before extracting watermark information insertion end of identification is the ratio of the length of watermark information Special sequence；If not, it is determined that the bit sequence currently extracted is watermark information insertion end of identification, so that it is determined that currently extract Watermark information before bit sequence is destroyed.For example, if the watermark information length of single insertion is 100 bits, it is single Secondary watermark insertion end mark information is continuous 16 0, and watermark information is continuous 16 0 from the 11st to 26, it is assumed that when mentioning After having taken the 1st to the 10th 10 bits, discovery the 11st to 26 are continuous 16 0, in order to determine that this 16 0 are No is end mark, can see after 100 bits whether to be that watermark information is embedded in end of identification 16 0, if so, determining the 16 0 of 11 to 26 may be actually useful watermark information, extract 100 before watermark information insertion end of identification Bit is as watermark information, if not, it is determined that continuous 16 0 are embedded in end of identification for watermark information, judge the 11st to 26 Watermark information before position is destroyed.
The watermark information insertion starts identification information, can refer to that the insertion of single watermark information starts identification information.In water The purpose that watermark information insertion opening flag information is added in the description information of official seal breath is to maintain the synchronizing information of watermark information.
In order to increase the robustness and anti-attack ability of watermark information insertion scheme, water can be determined according to actual needs Official seal ceases the number of redundant embedding in the channel.The number of watermark information redundant embedding in the channel can refer to all The number of redundant embedding in channel can also refer to the number of redundant embeddings in some or each channel.Watermark information is carried out The purpose of redundant embedding is, even if still being able to effectively mention in the case where the watermark information in one or more channels is destroyed Watermark information is taken, so that watermarking project has better robustness；In addition, malicious attacker may destroy some or it is several The watermark information in a channel, but as long as the watermark information in some channel is not destroyed, so that it may effectively extract；In addition, passing through Realize redundant embedding (such as each channel is only embedded in 1 time) in some cases it is possible to prevente effectively from single logical in multiple channels Redundant embedding caused the distortion to focus mostly in road.Although redundant embedding can increase watermark information insertion scheme to a certain extent Robustness and anti-attack ability, it is also possible to can cause cover object quality decline and increase insertion and extract calculating generation Valence, therefore, it is necessary to a balance appropriate is carried out between these factors.
The description information of the determining watermark information refers to the description letter for determining the watermark information for being supplied to watermark extracting end Breath.
As shown in Fig. 2, determining the description information of watermark information, may comprise steps of:
Step S101-1 determines the length of insertion watermark information；
Step S101-2 determines insertion channel；
Step S101-3 determines that watermark information is embedded in end of identification information；
Step S101-4 determines the number of watermark information redundant embedding.
Step S101-5 generates the description information of watermark information.
It should be noted that the description information of above-mentioned determining watermark information is one embodiment, it in the specific implementation, can With the step of comprising above-mentioned part steps, also may include other.
The process of the description information of determining watermark information is exemplified below.
1, the length of insertion watermark information is determined.There is a word document, watermark information ID value to be embedded is "13230".Use certain coding mode, it is assumed that the length of watermark information is 0,1 sequence of 10 bits after coding "0111101100".In order to enhance the robustness of watermarking project, error correcting code can be added.This example is simple in order to describe, it is assumed that no Using the mechanism for increasing error correcting code.In this way, the watermark information being actually embedded in is " 0111101100 ".Determine watermark information Length is 10 bits.
2, insertion channel is determined.For word document, 1. character color, 2. character pitch, 3. character position can be used Lifting, 4. character boundary and the 5. various ways such as line space carry out the insertion of watermark information.For example, taking preceding 4 kinds of modes just It can determine 4 insertion channels, successively be defined as channel 1-4 in order, such as be embedded in a manner of character color and be defined as Channel 1.
3, determine that watermark information is embedded in end of identification information.Defining single watermark insertion end mark is continuous 16 0 Bit sequence, i.e., " 0000 | | 0000 | | 0000 | | 0000 ".And non-real end the probability of conflict is 10 a ten thousandth points five, i.e., Indicate and is mistakenly considered end mark.
4, the number of watermark information redundant embedding is determined.In the present embodiment, the redundant embedding of each channel watermark is determined Number is 0.
5, the description information of watermark information is generated.
A) assume of length no more than 63 bit of the description information of insertion watermark information.6 bits then can be used To describe the length of embedding information.The length of currently embedded watermark information is 10 bits, can be expressed as 001010.
B) assume at most to include (or at most using) 15 insertion channels, used using 4 bit descriptions how many a embedding Enter channel, has then next described which channel specifically used using corresponding bit sequence.For this example, 4 have been used altogether A channel, and be just preceding 4 channels.So channel information can be described using following information: 0100 | | 0001 | | 0010 | | 0011 | | 0100, wherein symbol " | | " indicates cascade.
C) defining watermark insertion end mark is continuous 16 0 bit sequences, i.e., " 0000 | | 0000 | | 0000 | | 0000”。
D) maximum times for assuming watermark information redundant embedding are 7 times, then 3 bits can be used and describe redundant embedding Number.Current wa information redundancy is embedded as 0 time, i.e., no redundancy, continuous 30 descriptions can be used, i.e., " 000 ".
E) above step, the description information of the watermark information ultimately generated are based on are as follows:
“001010||0100||0001||0010||0011||0100||0000000000000000||000”
Watermark information is " 0111101100 "；
Wherein, the length of watermark information are as follows: 001010；
It is embedded in channel information are as follows: 0100 | | 0001 | | 0010 | | 0011 | | 0100；
Watermark information insertion end of identification information: 0000000000000000；
The number of watermark information redundant embedding: 000.
This step determines the description information of watermark information, is supplied to the description information of the watermark information for step S102 Watermark extracting end provides precondition.
As shown in Figure 1, in step s 102, the description information of the watermark information is supplied to watermark extracting end.
The description information of the watermark information is supplied to watermark extracting end, can use two ways: a kind of mode is: The description information of the watermark information is sent to watermark extracting end in the form of single message；Another way is: will be described The description information of watermark information is embedded into cover object.The cover object can refer to the description for needing to be embedded in watermark information The object of information, for example, word document, a pdf document etc..
The description information of the watermark information is embedded into cover object, it can be by least one channel by the water The description information of official seal breath is embedded into cover object, it can by a channel that the description information of the watermark information is embedding Enter into cover object, the description information of the watermark information can also be embedded into cover object by multiple channels.Example Such as, cover object is word document, and the description information of watermark information can be embedded into cover object by Color Channel, can also To be embedded into cover object by Color Channel and font access.
It should be noted that not being when the description information of watermark information to be embedded into cover object by channel Corresponding bit sequence of the description information of watermark information itself is embedded in cover object, but is embedded in ratio with hiding mode Special sequence.As shown in Figure 3 and Figure 4, it is assumed that go up and down the corresponding bit sequence of the description information of watermark information by character position Channel is embedded in the cover object of a word document, for example, will " End " this position in " complete " be embedded in bit " 1 " can allow the position of " End " to rise, " whole " this position in " complete " be embedded in bit " 0 ", can allow the position of " whole " It sets and remains unchanged, the variation gone up and down by character position, which is hidden, is embedded in bit sequence.
It should be noted that the channel that the description information of insertion watermark information uses, it can be according to the type of cover object And/or the feature of the description information of watermark information determines.For example, character color, character pitch, character can be used in word document The various ways such as position lifting, character boundary carry out the insertion of the description information of watermark information.
The description information of the watermark information is embedded into cover object by least one channel, one can be passed through The description information of the watermark information is only embedded in once into cover object by channel, it is preferred that some channel in order to prevent The description information of watermark information is destroyed, can also be by the description information redundant embedding of the watermark information into cover object. Specifically, the description information of the watermark information can be repeatedly embedded into cover object by a channel；Alternatively, passing through The description information of the watermark information is repeatedly embedded into cover object by multiple channels.
For example, the description information of watermark information can be repeatedly embedded into carrier by Color Channel in word document In object；Character color channel can also be passed through respectively, character pitch channel, character position liftway are retouched watermark information Information is stated repeatedly to be embedded into cover object.
In addition, may be used also when being embedded into the description information of the watermark information in cover object by least one channel The description information of the watermark information is first divided into multiple description sub-informations；It then will be described by multiple and different channels Multiple description sub-informations are embedded into cover object.
For example, the description information of watermark information can be first divided into description sub-information 1, description sub-information 2, description son letter Then description sub-information 1 is described sub-information 2 respectively by channel 1, channel 2, channel 3 by breath 3, description sub-information 3 is embedded into load In body object.
It is preferably, described that the description information of the watermark information is embedded into cover object by least one channel, It include: that the description information of the watermark information and the watermark information are embedded into cover object by the same channel.
It, can will be embedding it should be noted that for the description information that watermark extracting end can correctly extract watermark information The channel information used when entering the description information of watermark information is supplied to watermark extracting end；Alternatively, passing through watermark built-in end and water Print extracts at least one channel that end is made an appointment and the description information of the watermark information is embedded into cover object.For example, It is when being embedded in the description information of watermark information that watermark built-in end and watermark extracting end, which can default the Color Channel in word document, The channel used.
So far, the embodiment of the information providing method provided the application first embodiment is described in detail.This Apply for first embodiment in the description information for determining watermark information, in order to keep the synchronizing information of watermark information, believes in watermark Watermark information is added in the description information of breath and is embedded in end mark information；The description letter of the watermark information in some channel in order to prevent Breath is destroyed, by the description information redundant embedding of the watermark information into cover object；In order to increase watermark information insertion side The robustness and anti-attack ability of case can determine the number of watermark information redundant embedding according to actual needs.By above-mentioned each Kind measure ensure that the watermark information of insertion cover object is accurately extracted at watermark extracting end.
The application second embodiment provides a kind of method of watermark extracting.Referring to FIG. 5, it illustrates according to the application Embodiment provide a kind of watermark extracting method flow chart.It is described in detail below in conjunction with Fig. 5.
As shown in figure 5, obtaining the description information of watermark information, the description information of the watermark information in step S501 For describing the attribute information of watermark information.
The watermark information refers to that the additional information being added in cover object, additional information have specific meaning.It is described Cover object can be word document, PDF document, Excel file etc..The suitable watermark information being added in cover object, The safety of data is protected in the leakage that can prevent data, can be with for example, copyright information is added in word document as watermark Prevent piracy.
The description information of the watermark information is used to describe the attribute information of watermark information.The description of the watermark information is believed Breath may include: the length of watermark information；It is embedded in channel；Watermark information is embedded in end of identification information；Watermark information insertion starts Identification information；The number etc. of watermark information redundant embedding in the channel.
The length of the watermark information can refer to the number of bits that watermark information includes after encoding to watermark information； For example, watermark information is bit sequence " 0111101100 ", the length of watermark information is just 10 bits.
The channel can refer to the mode that watermark information is embedded in cover object, can also refer to and be embedded in cover object The mode of the description information of watermark information, therefore insertion channel can refer to the channel of insertion watermark information, can also refer to insertion water The channel of the description information of official seal breath.It is related to the type of cover object to be embedded in channel, for example, character can be used in word document The various ways such as color, character pitch, character position lifting, character boundary carry out watermark information insertion.Be embedded in channel also with it is embedding The feature for entering the watermark information of cover object or the description information of watermark information is related.
As one embodiment, the channel can refer to the description that watermark information or watermark information are embedded in cover object The position of information and the means of insertion, for example, in a word document, according to certain character pitch in a paragraph It is embedded in the description information or watermark information of watermark information, also according to certain character pitch or according to it in another paragraph The description information or watermark information of his form insertion watermark information, the two paragraphs and the embedded mode used respectively can divide It is not considered as two different channels.
The watermark information is embedded in end of identification information, can refer to that single watermark information is embedded in end of identification information.In water The purpose that watermark information insertion end mark information is added in the description information of official seal breath is to maintain the synchronizing information of watermark information. For example, at some channel watermark information redundant embedding 5 times, but the data in the channel are deleted a part (or corresponding diagram The shearing or translation of picture).If the watermark of subsequent redundant embedding will be believed without the end mark of each watermark insertion Breath loses synchronizing information, it is likely that will lead to extraction and fall flat as currently embedded watermark information.Watermark information is added Being embedded in end mark information can be to avoid this mistake.If the watermark information length of single insertion is 100 bits, single Secondary watermark insertion end mark information is the bit sequence of continuous 16 0 (probability of conflict is 10 a ten thousandth points five, very small) Column, i.e., " 0000 | | 0000 | | 0000 | | 0000 ", before encountering continuous 16 0, if the amount of bits extracted is less than 100 Bit is considered as data and is destroyed, and just abandons the watermark information currently extracted.And after 16 0, restart to mention It takes.
The watermark information insertion starts identification information, can refer to that the insertion of single watermark information starts identification information.In water The purpose that watermark information insertion opening flag information is added in the description information of official seal breath is to maintain the synchronizing information of watermark information.
The description information for obtaining watermark information, including two ways: if watermark built-in end believes the description of watermark information Breath is sent to watermark extracting end in the form of single message, correspondingly, then watermark extracting end obtains watermark built-in end individually to disappear The description information for the watermark information that the form of breath provides；Alternatively, if the description information of watermark information is embedded in by watermark built-in end Into cover object, correspondingly, then the description information of watermark information is extracted at watermark extracting end from cover object.
For example, the description information of watermark information is embedded in step S101 in the channel 1 are as follows: " 001010 | | 0100 | | 0001 | | 0010 | | 0011 | | 0100 | | 0000000000000000 | | 000 ", then above-mentioned watermark information is extracted from channel 1 Description information.
It should be noted that the presence of the description information due to watermark information, so that the mode of insertion watermark information every time It can be adjusted flexibly.For example, watermark information can then lead to when being embedded in next time in certain insertion through channel 1, channel 2 Cross channel 3, channel 4.No matter watermark information is embedded in by which channel, and watermark extracting end can obtain watermark information insertion Channel information.
The description information of watermark information is extracted from cover object, comprising: extract insertion carrier pair from least one channel The description information of the watermark information as in, the channel refer to the description information that watermark information is embedded in cover object Mode.If the description information of the watermark information is embedded into cover object by watermark built-in end by a channel, from Extract the description information of the watermark information in insertion cover object in one channel；If watermark built-in end passes through multiple channels The description information of the watermark information is embedded into cover object, then is extracted from multiple channels described in being embedded in cover object The description information of watermark information.For example, cover object is word document, if the description information of watermark information passes through Color Channel It is embedded into cover object, then extracts the description information of the watermark information in insertion cover object from Color Channel；If The description information of watermark information is embedded into cover object by Color Channel and font access, then logical from Color Channel and font Extract the description information of the watermark information in insertion cover object in road.
If the description information of the watermark information is embedded into carrier by a channel by watermark built-in end at least once In object, then the description information for the watermark information being embedded into cover object at least once is extracted from a channel；Alternatively, If the description information of the watermark information is repeatedly embedded into cover object by watermark built-in end by multiple channels, from more Extract the description information for the watermark information being repeatedly embedded into cover object in a channel.
For example, in word document, if the description information of watermark information is repeatedly embedded into carrier by Color Channel In object, then the description information for the watermark information being repeatedly embedded into cover object is extracted from Color Channel；If respectively The description information of watermark information is repeatedly embedded by character color channel, character pitch channel, character position liftway In cover object, is then extracted from character color channel, character pitch channel, character position liftway and be repeatedly embedded into carrier pair The description information of watermark information as in.
It should be noted that if the water being repeatedly embedded into cover object is extracted at watermark extracting end from multiple channels The description information of official seal breath, then need to remove the description information of the watermark information of redundancy.
When removing redundancy there are many mode, two ways therein: first way is exemplified below: first to from same The description information for the watermark information that one channel extracts removes redundancy, then removes the redundancy of interchannel, for example, if passing through channel 1, channel 2 and channel 3 have been respectively embedded into description information 3 times of watermark information, then the description of watermark information is extracted from channel 1 Information 1, the description information of watermark information 2, the description information of watermark information 3 extract the description letter of watermark information from channel 2 4, the description information 5 of watermark information, the description information of watermark information 6 are ceased, the description information of watermark information is extracted from channel 3 7, the description information 8, the description information of watermark information 9 of watermark information, the respectively description to the watermark information extracted from channel 1 Information 1, the description information of watermark information 2, the description information of watermark information 3, the description letter of the watermark information extracted from channel 2 4, the description information 5 of watermark information, the description information of watermark information 6 are ceased, and the description of the watermark information extracted from channel 3 Information 7, the description information of watermark information 8, the description information of watermark information 9 remove redundancy, if the watermark letter after removal redundancy The description information of breath is respectively the description information 1 of watermark information, the description information of the description information of watermark information 5 and watermark information 8, then redundancy is removed to the description information 8 of the description information of watermark information 1, the description information of watermark information 5 and watermark information again, The description information of final watermark information is obtained, ballot mode can be taken when removing redundancy.
The second way: the description information of whole watermark informations is first extracted from all channels, then removes redundancy, still edge With above-mentioned example, description information 1, the description information of watermark information 2, watermark of watermark information can be first extracted from channel 1 The description information 3 of information extracts description information 4, the description information of watermark information 5, the watermark letter of watermark information from channel 2 The description information 6 of breath extracts description information 7, the description information of watermark information 8, watermark information of watermark information from channel 3 Description information 9, redundancy is removed to the description information 1-9 of the whole watermark informations extracted, obtains final watermark information Description information.
It should be noted that the accuracy rate of the second way would generally be higher than first way, it can preferably second of side Formula.
If the multiple description sub-information is embedded into cover object by multiple and different channels, from least one The description information of the watermark information in insertion cover object is extracted in a channel, can first be extracted from multiple and different channels embedding Enter multiple description sub-informations into cover object；Then retouching for sub-information combination producing watermark information is described by the multiple again State information.
For example, if the description information of watermark information to be first first divided into description sub-information 1, description sub-information 2, description Then description sub-information 1 is described sub-information 2 respectively by channel 1, channel 2, channel 3 by information 3, description sub-information 3 is embedded into In cover object, then description sub-information 1, description sub-information 2, description sub-information are first extracted respectively from channel 1, channel 2, channel 3 3, then above three is described to the description information of sub-information combination producing watermark information.
It should be noted that for the description information that watermark extracting end can correctly extract watermark information, watermark extracting The channel information that the description information for the watermark information for holding available watermark built-in end to provide uses；Alternatively, being embedded in from watermark At least one channel made an appointment is held to obtain the description information of the watermark information.For example, if watermark built-in end and watermark Extracting the Color Channel in the default word document of end is the channel used when being embedded in the description information of watermark information, then logical from color The description information of road extraction watermark information.
As shown in figure 5, in step S502, the description information based on watermark information extracts watermark letter from cover object Breath.
Description information based on watermark information, extracts watermark information from cover object, comprising: extracts from the same channel Be embedded into the watermark information in cover object description information and the watermark information.If passing through the same channel for institute The description information and the watermark information for stating watermark information are embedded into cover object, then extract watermark information from the same channel Description information and watermark information.
The example in step S101 is continued to use below, is illustrated the description information based on watermark information, is extracted from cover object The process of watermark information.
It 1, is the description information of extraction watermark information in character color variation channel from channel 1 by step S501 are as follows:
"00101001000001001001101000000000000000000000"；
2, to " 001010 | | 0100 | | 0001001000110100 | | 0000000000000000000 " parse.
A) according to preceding 6 bits " 001010 ", it can determine that the length of watermark information is 10 bits；
B) from next 4 bits " 0100 ", it can determine and use 4 channels altogether；
C) it can determine that use is exactly preceding 4 channels from next 16 bits " 0001001000110100 ".
D) can determine that it is watermark information insertion from next 16 bits " 0000000000000000 " terminates Identification information.
E) it can determine that the number of each channel watermark information redundant embedding is 0 from 3 last bits " 000 ".
3, the description information of the watermark information parsed according to step 2 is extracted in multiple channels respectively and is actually embedded in Watermark information: " 0111101100 ", " 0111101100 " and " 0111101100 ".
4, on the basis of step 3, redundancy is removed to the watermark information in the multiple channels extracted, is finally extracted Removal redundancy after the watermark information " 0111101100 " being actually embedded in.
So far, the embodiment of the watermark extracting method provided the application second embodiment is described in detail.This Application second embodiment obtains the description information of watermark information first, the description information of watermark information is then based on, from carrier pair As middle extraction watermark information.Description information based on watermark information when due to extracting watermark information from cover object, can With the accurate watermark information for extracting insertion cover object.
Corresponding with a kind of information providing method of above-mentioned offer, the application 3rd embodiment additionally provides a kind of information Device is provided.
As shown in fig. 6, information provider unit includes: description information determination unit 601, description information offer unit 602.
Description information determination unit 601, for determining the description information of watermark information, the description information of the watermark information For describing the attribute information of watermark information；
Description information provides unit 602, for the description information of the watermark information to be supplied to watermark extracting end.
Optionally, the description information provides unit, comprising:
Description information transmission sub-unit, for the description information of the watermark information to be sent in the form of single message Watermark extracting end；Alternatively,
Description information is embedded in subelement, for the description information of the watermark information to be embedded into cover object.
Optionally, the description information is embedded in subelement, is specifically used for:
The description information of the watermark information is embedded into cover object by least one channel, the channel refers to The mode of the description information of watermark information is embedded in cover object.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information is embedded into cover object at least once by a channel；Alternatively,
The description information of the watermark information is repeatedly embedded into cover object by multiple channels.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information is divided into multiple description sub-informations；
The multiple description sub-information is embedded into cover object by multiple and different channels.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information and the watermark information are embedded into cover object by the same channel.
Optionally, described device further include:
Channel determination unit, the feature for the description information according to the type and/or watermark information of cover object determine For being embedded in the channel of the description information of watermark information.
Optionally, the description information of the watermark information includes following at least one information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information is embedded in the channel starts identification information；
The number of watermark information redundant embedding.
Optionally, described device further include: channel information provides unit, when for that will be embedded in the description information of watermark information The channel information used is supplied to watermark extracting end；Alternatively,
It is described that the description information of the watermark information is embedded into cover object by least one channel, comprising: logical It crosses at least one channel made an appointment with watermark extracting end the description information of the watermark information is embedded into cover object.
It should be noted that can be referred to for the detailed description for the information provider unit that the application 3rd embodiment provides To the associated description of the application first embodiment, which is not described herein again.
Corresponding with a kind of watermark extracting method of above-mentioned offer, the application fourth embodiment additionally provides a kind of watermark Extraction element.
As shown in fig. 7, information provider unit includes: description information acquiring unit 701, watermark information extraction unit 702.
Description information acquiring unit 701, for obtaining the description information of watermark information, the description information of the watermark information For describing the attribute information of watermark information；
Watermark information extraction unit 702 extracts watermark letter for the description information based on watermark information from cover object Breath.
Optionally, the description information acquiring unit, comprising:
Description information obtains subelement, for obtaining watermark information that watermark built-in end is provided in the form of single message Description information；Alternatively,
Description information extracts subelement, for extracting the description information of watermark information from cover object.
Optionally, the description information extracts subelement, is specifically used for:
The description information of the watermark information in insertion cover object is extracted from least one channel, the channel refers to The mode of the description information of watermark information is embedded in cover object.
Optionally, the description information that the watermark information in insertion cover object is extracted from least one channel, Include:
The description information for the watermark information being embedded into cover object at least once is extracted from a channel；Alternatively,
The description information for the watermark information being repeatedly embedded into cover object is extracted from multiple channels.
Optionally, the description information that the watermark information in insertion cover object is extracted from least one channel, Include:
The multiple description sub-informations being embedded into cover object are extracted from multiple and different channels；
By the description information of watermark information described in the multiple description sub-information combination producing.
Optionally, the watermark information extraction unit, is specifically used for:
The description information and watermark letter of the watermark information being embedded into cover object are extracted from the same channel Breath.
Optionally, the description information of the watermark information includes following at least one information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information insertion starts identification information；
The number of watermark information redundant embedding in the channel.
Optionally, further includes:
Channel information acquiring unit, the channel used for obtaining the description information of watermark information of watermark built-in end offer Information；Alternatively,
It is described from least one channel extract insertion cover object in the watermark information description information include: from At least one channel that watermark built-in end is made an appointment obtains the description information of the watermark information.
It should be noted that can be referred to for the detailed description for the watermark extraction apparatus that the application fourth embodiment provides To the associated description of the application second embodiment, which is not described herein again.
Corresponding with a kind of information providing method of above-mentioned offer, the 5th embodiment of the application additionally provides a kind of electronics Equipment.
As shown in figure 8, electronic equipment includes:
Processor 801；And
Memory 802, for the program of information providing method, which is powered and runs the information by the processor After the program of providing method, following step is executed:
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute letter of watermark information Breath；
The description information of the watermark information is supplied to watermark extracting end.
Optionally, the description information by the watermark information is supplied to watermark extracting end, comprising:
The description information of the watermark information is sent to watermark extracting end in the form of single message；Alternatively,
The description information of the watermark information is embedded into cover object.
Optionally, the description information by the watermark information is embedded into cover object, comprising:
The description information of the watermark information is embedded into cover object by least one channel, the channel refers to The mode of the description information of watermark information is embedded in cover object.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information is embedded into cover object at least once by a channel；Alternatively,
The description information of the watermark information is repeatedly embedded into cover object by multiple channels.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information is divided into multiple description sub-informations；
The multiple description sub-information is embedded into cover object by multiple and different channels.
It is optionally, described that the description information of the watermark information is embedded into cover object by least one channel, Include:
The description information of the watermark information and the watermark information are embedded into cover object by the same channel.
Optionally, further includes:
It is determined according to the feature of the type of cover object and/or the description information of watermark information for being embedded in watermark information The channel of description information.
Optionally, the description information of the watermark information includes following at least one information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information insertion starts identification information；
The number of watermark information redundant embedding in the channel.
Optionally, further includes: the channel information used when the description information that will be embedded in watermark information is supplied to watermark extracting End；Alternatively,
It is described that the description information of the watermark information is embedded into cover object by least one channel, comprising: logical It crosses at least one channel made an appointment with watermark extracting end the description information of the watermark information is embedded into cover object.
It should be noted that can be with reference pair sheet for the detailed description of the electronic equipment of the 5th embodiment of the application offer Apply for the associated description of first embodiment, which is not described herein again.
Corresponding with a kind of watermark extracting method of above-mentioned offer, the application sixth embodiment additionally provides another electricity Sub- equipment.
As shown in figure 9, electronic equipment includes:
Processor 901；And
Memory 902, for the program of watermark extracting method, which is powered and runs the watermark by the processor After the program of extracting method, following step is executed:
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute letter of watermark information Breath；
Description information based on watermark information, extracts watermark information from cover object.
Optionally, the description information for obtaining watermark information, comprising:
Obtain the description information for the watermark information that watermark built-in end is provided in the form of single message；Alternatively,
The description information of watermark information is extracted from cover object.
Optionally, the description information that watermark information is extracted from cover object, comprising:
The description information of the watermark information in insertion cover object is extracted from least one channel, the channel refers to The mode of the description information of watermark information is embedded in cover object.
Optionally, the description information that the watermark information in insertion cover object is extracted from least one channel, Include:
The description information for the watermark information being embedded into cover object at least once is extracted from a channel；Alternatively,
The description information for the watermark information being repeatedly embedded into cover object is extracted from multiple channels.
Optionally, the description information that the watermark information in insertion cover object is extracted from least one channel, Include:
The multiple description sub-informations being embedded into cover object are extracted from multiple and different channels；
By the description information of watermark information described in the multiple description sub-information combination producing.
Optionally, based on the description information of watermark information, watermark information is extracted from cover object, comprising:
The description information and watermark letter of the watermark information being embedded into cover object are extracted from the same channel Breath.
Optionally, the description information of the watermark information includes following at least one information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information insertion starts identification information；
The number of watermark information redundant embedding in the channel.
Optionally, following step is also executed:
Obtain the channel information that the description information for the watermark information that watermark built-in end provides uses；Alternatively,
It is described from least one channel extract insertion cover object in the watermark information description information include: from At least one channel that watermark built-in end is made an appointment obtains the description information of the watermark information.
It should be noted that can be with reference pair sheet for the detailed description of the electronic equipment of the application sixth embodiment offer Apply for the associated description of second embodiment, which is not described herein again.
The 7th embodiment of the application provides a kind of storage equipment,
It is stored with the program for storing information providing method, which is run by processor, execute following step:
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute letter of watermark information Breath；
The description information of the watermark information is supplied to watermark extracting end.
It should be noted that can be with reference pair sheet for the detailed description of the storage equipment of the 7th embodiment of the application offer Apply for the associated description of first embodiment, which is not described herein again.
The 8th embodiment of the application provides another storage equipment,
It is stored with the program for storing watermark extracting method, which is run by processor, execute following step:
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute letter of watermark information Breath；
Description information based on watermark information, extracts watermark information from cover object.
It should be noted that can be with reference pair sheet for the detailed description of the storage equipment of the 8th embodiment of the application offer Apply for the associated description of second embodiment, which is not described herein again.
Although the application is disclosed as above with preferred embodiment, it is not for limiting the application, any this field skill Art personnel are not departing from spirit and scope, can make possible variation and modification, therefore the guarantor of the application Shield range should be subject to the range that the claim of this application defined.
In a typical configuration, calculating equipment includes one or more processors (CPU), input/output interface, net Network interface and memory.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data. The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM), Digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disk storage or other magnetic storage devices Or any other non-transmission medium, can be used for storage can be accessed by a computing device information.As defined in this article, it calculates Machine readable medium does not include non-temporary computer readable media (transitory media), such as the data-signal and carrier wave of modulation.
It will be understood by those skilled in the art that embodiments herein can provide as method, system or computer program product. Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application Form.It is deposited moreover, the application can be used to can be used in the computer that one or more wherein includes computer usable program code The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) Formula.

Claims (23)

1. a kind of information providing method characterized by comprising
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute information of watermark information；
The description information of the watermark information is supplied to watermark extracting end.
2. the method according to claim 1, wherein the description information by the watermark information provides water supply Print extracts end, comprising:
The description information of the watermark information is sent to watermark extracting end in the form of single message；Alternatively,
The description information of the watermark information is embedded into cover object.
3. according to the method described in claim 2, it is characterized in that, the description information by the watermark information is embedded into load In body object, comprising:
The description information of the watermark information is embedded into cover object by least one channel, the channel, which refers to, to be carried The mode of the description information of watermark information is embedded in body object.
4. according to the method described in claim 3, it is characterized in that, it is described by least one channel by the watermark information Description information is embedded into cover object, comprising:
The description information of the watermark information is embedded into cover object at least once by a channel；Alternatively,
The description information of the watermark information is repeatedly embedded into cover object by multiple channels.
5. according to the method described in claim 3, it is characterized in that, it is described by least one channel by the watermark information Description information is embedded into cover object, comprising:
The description information of the watermark information is divided into multiple description sub-informations；
The multiple description sub-information is embedded into cover object by multiple and different channels.
6. according to the method described in claim 3, it is characterized in that, it is described by least one channel by the watermark information Description information is embedded into cover object, comprising:
The description information of the watermark information and the watermark information are embedded into cover object by the same channel.
7. according to the method described in claim 3, it is characterized by further comprising:
The description for being embedded in watermark information is determined according to the feature of the type of cover object and/or the description information of watermark information The channel of information.
8. the method according to claim 1, wherein the description information of the watermark information includes following at least one Kind information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information insertion starts identification information；
The number of watermark information redundant embedding in the channel.
9. according to the method described in claim 3, it is characterized by further comprising: watermark information will be embedded in description information when make Channel information is supplied to watermark extracting end；Alternatively,
It is described that the description information of the watermark information is embedded into cover object by least one channel, comprising: by with The description information of the watermark information is embedded into cover object by least one channel that watermark extracting end is made an appointment.
10. a kind of method of watermark extracting characterized by comprising
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute information of watermark information；
Description information based on watermark information, extracts watermark information from cover object.
11. according to the method described in claim 10, it is characterized in that, the description information for obtaining watermark information, comprising:
Obtain the description information for the watermark information that watermark built-in end is provided in the form of single message；Alternatively,
The description information of watermark information is extracted from cover object.
12. according to the method for claim 11, which is characterized in that the description for extracting watermark information from cover object Information, comprising:
The description information of the watermark information in insertion cover object is extracted from least one channel, the channel, which refers to, to be carried The mode of the description information of watermark information is embedded in body object.
13. according to the method for claim 12, which is characterized in that described to extract insertion cover object from least one channel In the watermark information description information, comprising:
The description information for the watermark information being embedded into cover object at least once is extracted from a channel；Alternatively,
The description information for the watermark information being repeatedly embedded into cover object is extracted from multiple channels.
14. according to the method for claim 12, which is characterized in that described to extract insertion cover object from least one channel In the watermark information description information, comprising:
The multiple description sub-informations being embedded into cover object are extracted from multiple and different channels；
By the description information of watermark information described in the multiple description sub-information combination producing.
15. according to the method for claim 12, which is characterized in that the description information based on watermark information, from cover object Middle extraction watermark information, comprising:
The description information for the watermark information that extraction is embedded into cover object from the same channel and the watermark information.
16. according to the method for claim 12, which is characterized in that the description information of the watermark information include it is following at least A kind of information:
The length of watermark information；
It is embedded in channel；
Watermark information is embedded in end of identification information；
Watermark information insertion starts identification information；
The number of watermark information redundant embedding in the channel.
17. according to the method for claim 13, which is characterized in that further include:
Obtain the channel information that the description information for the watermark information that watermark built-in end provides uses；Alternatively,
It is described from least one channel extract insertion cover object in the watermark information description information include: from watermark At least one channel that built-in end is made an appointment obtains the description information of the watermark information.
18. a kind of information provider unit characterized by comprising
Description information determination unit, for determining the description information of watermark information, the description information of the watermark information is for retouching State the attribute information of watermark information；
Description information provides unit, for the description information of the watermark information to be supplied to watermark extracting end.
19. a kind of device of watermark extracting characterized by comprising
Description information acquiring unit, for obtaining the description information of watermark information, the description information of the watermark information is for retouching State the attribute information of watermark information；
Watermark information extraction unit extracts watermark information for the description information based on watermark information from cover object.
20. a kind of electronic equipment characterized by comprising
Processor；And
Memory, for the program of information providing method, which is powered and runs the information providing by the processor After the program of method, following step is executed:
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute information of watermark information；
The description information of the watermark information is supplied to watermark extracting end.
21. a kind of electronic equipment characterized by comprising
Processor；And
Memory, for the program of watermark extracting method, which is powered and runs the watermark extracting side by the processor After the program of method, following step is executed:
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute information of watermark information；
Description information based on watermark information, extracts watermark information from cover object.
22. a kind of storage equipment, which is characterized in that
It is stored with the program for storing information providing method, which is run by processor, execute following step:
Determine that the description information of watermark information, the description information of the watermark information are used to describe the attribute information of watermark information；
The description information of the watermark information is supplied to watermark extracting end.
23. a kind of storage equipment, which is characterized in that
It is stored with the program for storing watermark extracting method, which is run by processor, execute following step:
The description information of watermark information is obtained, the description information of the watermark information is used to describe the attribute information of watermark information；
Description information based on watermark information, extracts watermark information from cover object.
CN201810329642.4A 2018-04-13 2018-04-13 Method, device and equipment for providing information and extracting watermark Active CN110378829B (en)

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