CN108833939A - Generate the method and device of the poster of video - Google Patents
Generate the method and device of the poster of video Download PDFInfo
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- CN108833939A CN108833939A CN201810637904.3A CN201810637904A CN108833939A CN 108833939 A CN108833939 A CN 108833939A CN 201810637904 A CN201810637904 A CN 201810637904A CN 108833939 A CN108833939 A CN 108833939A
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23418—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8549—Creating video summaries, e.g. movie trailer
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- Engineering & Computer Science (AREA)
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Abstract
This disclosure relates to generate the method and device of the poster of video.This method includes：Determine the key frame of target video；Obtain the clarity of the key frame；Meet the key frame of first condition if it exists, then generate the poster of the target video according to the first key frame, wherein first key frame is the highest key frame of clarity in the key frame for meet the first condition.The disclosure passes through the key frame for determining target video, obtain the clarity of key frame, meet the key frame of first condition if it exists, the poster of target video is then generated according to the highest key frame of clarity in the key frame for meeting first condition, thus, it is possible to automatically generate the poster of video, manpower is saved, the poster of generation is able to reflect the key content of video, and the clarity of the poster generated is higher.
Description
Technical field
This disclosure relates to video technique field more particularly to a kind of method and device for the poster for generating video.
Background technique
The poster of video can help user tentatively to understand video content.In the related technology, usually by video uploader or
After the operation personnel of person's video website watches complete video, select a frame as the poster of the video from the video.This side
Formula needs to expend a large amount of manpowers, and the poster manually chosen not necessarily is able to reflect the key content of video.
Summary of the invention
In view of this, the present disclosure proposes a kind of method and devices of poster for generating video.
According to the one side of the disclosure, a kind of method of poster for generating video is provided, including：
Determine the key frame of target video；
Obtain the clarity of the key frame；
Meet the key frame of first condition if it exists, then generate the poster of the target video according to the first key frame,
In, first key frame is the highest key frame of clarity in the key frame for meet the first condition.
In one possible implementation, the first condition includes following one or more：
The area ratio for specifying object to account for the key frame in the key frame is greater than first threshold；
The area ratio for specifying object to account for the key frame described in the key frame is less than second threshold, wherein described
Second threshold is greater than the first threshold；
It is specified between the geometric center of object region and the geometric center of the key frame described in the key frame
Distance be less than distance threshold；
The degree of overlapping between object is specified to be less than third threshold value described in the key frame；
The posture of object is specified to meet posture condition described in the key frame；
The expression of object is specified to meet expression condition described in the key frame.
In one possible implementation, the key frame of target video is determined, including：
The video frame for meeting second condition in the target video is determined as to the key frame of the target video,
Wherein, the second condition includes with the next item down or two：
The video frame includes specified object,
The video frame includes subtitle.
In one possible implementation, the poster of the target video is generated according to the first key frame, including：
If the clarity of first key frame carries out raising clarity less than the 4th threshold value, to first key frame
The clarity of processing, first key frame that makes that treated is greater than or equal to the 4th threshold value；
According to the poster of treated the first key frame the generates target video.
In one possible implementation, after the clarity for obtaining the key frame, the method also includes：
Meet the key frame of the first condition if it does not exist, then intercepts the finger for meeting third condition from the key frame
Determine the image of object；
According to the image for the specified object for meeting the third condition, the poster of the target video is generated.
In one possible implementation, the third condition includes with the next item down or two：
The posture of the specified object meets posture condition；
The expression of the specified object meets expression condition.
In one possible implementation, before determining the key frame of target video, the method also includes：
Determine the specified object of the target video.
In one possible implementation, the specified object of the target video is determined, including：
Obtain the dominant role information of the target video；
According to the dominant role information, the specified object of the target video is determined.
In one possible implementation, the specified object of the target video is determined, including：
Obtain the subtitle of the target video；
The subtitle is analyzed, determines the specified object of the target video.
According to another aspect of the present disclosure, a kind of device of poster for generating video is provided, including：
First determining module, for determining the key frame of target video；
Module is obtained, for obtaining the clarity of the key frame；
First generation module, for meeting the key frame of first condition if it exists, then according to the generation of the first key frame
The poster of target video, wherein first key frame is the highest pass of clarity in the key frame for meet the first condition
Key frame.
In one possible implementation, the first condition includes following one or more：
The area ratio for specifying object to account for the key frame in the key frame is greater than first threshold；
The area ratio for specifying object to account for the key frame described in the key frame is less than second threshold, wherein described
Second threshold is greater than the first threshold；
It is specified between the geometric center of object region and the geometric center of the key frame described in the key frame
Distance be less than distance threshold；
The degree of overlapping between object is specified to be less than third threshold value described in the key frame；
The posture of object is specified to meet posture condition described in the key frame；
The expression of object is specified to meet expression condition described in the key frame.
In one possible implementation, first determining module is used for：
The video frame for meeting second condition in the target video is determined as to the key frame of the target video,
Wherein, the second condition includes with the next item down or two：
The video frame includes specified object,
The video frame includes subtitle.
In one possible implementation, first generation module includes：
Submodule is improved, it is crucial to described first if the clarity for first key frame is less than the 4th threshold value
Frame carries out improving clarity processing, and the clarity for first key frame that makes that treated is greater than or equal to the 4th threshold value；
Submodule is generated, for the poster according to treated the first key frame the generates target video.
In one possible implementation, described device further includes：
Interception module is then intercepted from the key frame full for meeting the key frame of the first condition if it does not exist
The image of the specified object of sufficient third condition；
Second generation module generates the target view for the image according to the specified object for meeting the third condition
The poster of frequency.
In one possible implementation, the third condition includes with the next item down or two：
The posture of the specified object meets posture condition；
The expression of the specified object meets expression condition.
In one possible implementation, described device further includes：
Second determining module, for determining the specified object of the target video.
In one possible implementation, second determining module includes：
First acquisition submodule, for obtaining the dominant role information of the target video；
First determines submodule, for determining the specified object of the target video according to the dominant role information.
In one possible implementation, second determining module includes：
Second acquisition submodule, for obtaining the subtitle of the target video；
Second determines that submodule determines the specified object of the target video for analyzing the subtitle.
According to another aspect of the present disclosure, a kind of device of poster for generating video is provided, including：Processor；For
The memory of storage processor executable instruction；Wherein, the processor is configured to executing the above method.
According to another aspect of the present disclosure, a kind of non-volatile computer readable storage medium storing program for executing is provided, is stored thereon with
Computer program instructions, wherein the computer program instructions realize the above method when being executed by processor.
The method and device of the poster of the generation video of all aspects of this disclosure passes through the key frame for determining target video, obtains
The clarity of key frame is taken, meets the key frame of first condition if it exists, then according to clear in the key frame for meeting first condition
The poster that highest key frame generates target video is spent, thus, it is possible to automatically generate the poster of video, saves manpower, the sea of generation
Report is able to reflect the key content of video, and the clarity of the poster generated is higher.
According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, the other feature and aspect of the disclosure will become
It is clear.
Detailed description of the invention
Comprising in the description and constituting the attached drawing of part of specification and specification together illustrates the disclosure
Exemplary embodiment, feature and aspect, and for explaining the principles of this disclosure.
Fig. 1 shows the flow chart of the method for the poster of the generation video according to one embodiment of the disclosure.
Fig. 2 shows crucial according to first in the method and step S13 according to the poster for generating video of one embodiment of the disclosure
Frame generates an illustrative flow chart of the poster of target video.
Fig. 3 shows an illustrative flow chart of the method for the poster of the generation video according to one embodiment of the disclosure.
Fig. 4 shows the flow chart of the another exemplary of the method for the poster of the generation video according to one embodiment of the disclosure.
Fig. 5 shows an illustrative stream of the method and step S41 of the poster of the generation video according to one embodiment of the disclosure
Cheng Tu.
Fig. 6 shows the another exemplary of the method and step S41 of the poster of the generation video according to one embodiment of the disclosure
Flow chart.
Fig. 7 shows the block diagram of the device of the poster of the generation video according to one embodiment of the disclosure.
Fig. 8 shows an illustrative block diagram of the device of the poster of the generation video according to one embodiment of the disclosure.
Fig. 9 is shown according to an exemplary embodiment a kind of for generating the block diagram of the device 800 of the poster of video.
Figure 10 is shown according to an exemplary embodiment a kind of for generating the block diagram of the device 1900 of the poster of video.
Specific embodiment
Various exemplary embodiments, feature and the aspect of the disclosure are described in detail below with reference to attached drawing.It is identical in attached drawing
Appended drawing reference indicate element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, giving numerous details in specific embodiment below to better illustrate the disclosure.
It will be appreciated by those skilled in the art that without certain details, the disclosure equally be can be implemented.In some instances, for
Method, means, element and circuit well known to those skilled in the art are not described in detail, in order to highlight the purport of the disclosure.
Fig. 1 shows the flow chart of the method for the poster of the generation video according to one embodiment of the disclosure.Shown in 1, this method
Including step S11 to step S13.
In step s 11, the key frame of target video is determined.
In the embodiments of the present disclosure, target video can be any required video for generating poster.The key of target video
Frame is able to reflect the key content of target video.
In one possible implementation, before determining the key frame of target video, this method further includes：It obtains full
The target video of sufficient fourth condition.
As an example of the implementation, fourth condition includes following one or more：Video is digital video；Depending on
Frequency is using specified coding standard；Video length is in first interval；The clarity of video is higher than the 5th threshold value；The language of video
For appointed language；The video frame quantity of video is greater than the 6th threshold value；Video includes subtitle.Wherein, specified coding standard can be with
Including one or more coding standards.For example, specified coding standard includes H.264 standard and H.265 standard.Specified language
It may include one or more language.For example, specified language is Chinese.
In one possible implementation, the key frame of target video is determined, including：Second will be met in target video
The video frame of condition is determined as the key frame of target video.Wherein, second condition includes with the next item down or two：Video frame includes
Specified object, video frame include subtitle.
In the embodiments of the present disclosure, specified object may include one or more objects.Specified object can be people, can also
To be cartoon figure or other objects, it is not limited thereto.If specified object includes multiple objects, second condition be can wrap
It includes：Video frame includes all specified objects.
It should be noted that, those skilled in the art energy as above although describing second condition in a manner of implementation above
Enough to understand, the disclosure is answered without being limited thereto.Those skilled in the art can be according to practical application scene demand and/or personal preference spirit
Setting second condition living.
In step s 12, the clarity of key frame is obtained.
In one possible implementation, the clarity of each video frame of available target video, and can be from
The clarity of key frame is determined in the clarity of each video frame obtained.
In alternatively possible implementation, can only obtain the clarity of key frame, without obtain key frame with
The clarity of other outer video frames, thus, it is possible to reduce operand.
In one possible implementation, the text information in key frame can also be obtained.For example, available key
Subtitle in frame.
In one possible implementation, edge extraction techniques can also be used, the image outline in key frame is extracted
Feature.
In step s 13, meet the key frame of first condition if it exists, then target video is generated according to the first key frame
Poster, wherein the first key frame is the highest key frame of clarity in the key frame for meet first condition.
In one possible implementation, it can first determine whether the highest key frame of clarity meets first
Part, if the highest key frame of clarity meets first condition, can using the highest key frame of clarity as the first key frame,
If the highest key frame of clarity is unsatisfactory for first condition, can continue to judge whether the high key frame of clarity second meets
First condition, and so on.
It in one possible implementation, can be with if the clarity of the first key frame is greater than or equal to the 4th threshold value
The poster of target video is generated according to the key message of the first key frame and target video.For example, the crucial letter of target video
Breath may include the name of the title of target video and the specified object of target video.It in this implementation, can be first
The key message for increasing target video on key frame, generates the poster of target video.
In one possible implementation, first condition includes following one or more：Object is specified to account in key frame
The area ratio of key frame is greater than first threshold；The area ratio for specifying object to account for key frame in key frame is less than second threshold,
Wherein, second threshold is greater than first threshold；It is specified in the geometric center of object region and the geometry of key frame in key frame
The distance between heart is less than distance threshold；The degree of overlapping between object is specified to be less than third threshold value in key frame；Key frame middle finger
The posture for determining object meets posture condition；The expression of object is specified to meet expression condition in key frame.
In this implementation, specified object accounts for the area ratio of key frame, can be equal to area and the pass of specified object
The ratio of the area of key frame.
In this implementation, specifying object region can be the corresponding region of profile of specified object；Alternatively, referring to
Determining object region can be the corresponding region of the external quadrangle of minimum of specified object.
In this implementation, the degree of overlapping between two specified objects can be equal to the overlapping region of two specified objects
Area and two specified objects the gross area ratio.
In this implementation, posture condition may include one or more postures.For example, posture condition include stance and
Sitting posture.If specifying the posture of object in key frame is stance or sitting posture, it can determine and specify the posture of object full in key frame
Sufficient posture condition；If specifying the posture of object to be neither stance nor be sitting posture in key frame, key frame middle finger can be determined
The posture for determining object is unsatisfactory for posture condition.
In this implementation, expression condition may include one or more expressions.For example, expression condition is the table smiled
Feelings.If specifying the expression of object in key frame is the expression smiled, it can determine that the expression that object is specified in key frame meets
Expression condition；If specifying the expression of object in key frame is not the expression smiled, it can determine and specify object in key frame
Expression is unsatisfactory for expression condition.
It include that the area ratio for specifying object to account for key frame in key frame is greater than the in first condition according to the implementation
When one threshold value, it can be avoided in the poster generated according to the first key frame and specify object occupied area too small；In first condition packet
When including the area ratio for specifying object to account for key frame in key frame less than second threshold, it can be avoided and generated according to the first key frame
Poster in specify object occupied area it is excessive；It include the geometric center that object region is specified in key frame in first condition
When the distance between geometric center of key frame is less than distance threshold, it can guarantee in the poster generated according to the first key frame
Specified object is in close to the position of poster geometric center；It include the degree of overlapping specified in key frame between object in first condition
When less than third threshold value, it can guarantee to specify the degree of overlapping between object smaller in the poster generated according to the first key frame；?
First condition includes that can guarantee when specifying the posture of object to meet posture condition in key frame according to the generation of the first key frame
The posture of object is specified to meet posture condition in poster；It include specifying the expression of object to meet expression in key frame in first condition
When condition, it can guarantee to specify the expression of object to meet expression condition in the poster generated according to the first key frame.
It should be noted that, those skilled in the art energy as above although describing first condition in a manner of implementation above
Enough to understand, the disclosure is answered without being limited thereto.Those skilled in the art can be according to practical application scene demand and/or personal preference spirit
Setting first condition living.
The embodiment of the present disclosure passes through the key frame for determining target video, obtains the clarity of key frame, meets the if it exists
The key frame of one condition then generates the sea of target video according to the highest key frame of clarity in the key frame for meeting first condition
Report saves manpower thus, it is possible to automatically generate the poster of video, and the poster of generation is able to reflect the key content of video, and raw
At poster clarity it is higher.
Fig. 2 shows crucial according to first in the method and step S13 according to the poster for generating video of one embodiment of the disclosure
Frame generates an illustrative flow chart of the poster of target video.As shown in Fig. 2, generating target video according to the first key frame
Poster may include step S131 and step S132.
In step S131, if the clarity of the first key frame improves the first key frame less than the 4th threshold value
The clarity of clarity processing, first key frame that makes that treated is greater than or equal to the 4th threshold value.
In the embodiments of the present disclosure, the first key frame can be carried out using related art method improving clarity processing.
In step S132, the poster of target video is generated according to treated the first key frame.
In one possible implementation, the crucial letter of target video can be increased on the first key frame after treatment
Breath, generates the poster of target video.
In the embodiments of the present disclosure, if by the clarity of the first key frame less than the 4th threshold value, to the first key frame
It carries out improving clarity processing, the clarity for first key frame that makes that treated is greater than or equal to the 4th threshold value, and according to processing
The first key frame afterwards generates the poster of target video, and the clarity so as to guarantee poster generated is higher.
Fig. 3 shows an illustrative flow chart of the method for the poster of the generation video according to one embodiment of the disclosure.Such as
Shown in Fig. 3, this method may include step S11 to step S15.
In step s 11, the key frame of target video is determined.
In step s 12, the clarity of key frame is obtained.
In step s 13, meet the key frame of first condition if it exists, then target video is generated according to the first key frame
Poster, wherein the first key frame is the highest key frame of clarity in the key frame for meet first condition.
In step S14, meet the key frame of first condition if it does not exist, then interception meets third condition from key frame
Specified object image.
In one possible implementation, third condition includes with the next item down or two：The posture of specified object meets
Posture condition；The expression of specified object meets expression condition.
It can guarantee root when the posture that third condition includes specified object meets posture condition according to the implementation
The posture of object is specified to meet posture condition in the poster generated according to the image for the specified object for meeting third condition；In Article 3
When part includes that the expression of specified object meets expression condition, it can guarantee raw according to the image for the specified object for meeting third condition
At poster in specify object expression meet expression condition.
It should be noted that, those skilled in the art energy as above although describing third condition in a manner of implementation above
Enough to understand, the disclosure is answered without being limited thereto.Those skilled in the art can be according to practical application scene demand and/or personal preference spirit
Setting third condition living.
In step S15, according to the image for the specified object for meeting third condition, the poster of target video is generated.
In one possible implementation, if there is only a specified object, third can be met according to interception
The specified object of condition and the key message of target video generate the poster of target video.
In one possible implementation, multiple specified objects if it exists, then can meet Article 3 according to interception
Multiple specified object of part and the key message of target video generate the poster of target video.In this implementation, exist
When generating the poster of target video, the degree of overlapping that can control between specified object is less than third threshold value.
In one possible implementation, place can be zoomed in and out to the image for the specified object for meeting third condition
Reason makes the area accounting for specifying object in poster generated be greater than first threshold, and thus, it is possible to avoid according to meeting Article 3
Specify object occupied area too small in the poster that the image of the specified object of part generates.
In one possible implementation, place can be zoomed in and out to the image for the specified object for meeting third condition
Reason makes the area accounting for the image for specifying object in poster generated be less than second threshold, and thus, it is possible to avoid according to satisfaction
Specify object occupied area excessive in the poster that the image of the specified object of third condition generates.
In one possible implementation, it can control in the geometry for specifying object region in poster generated
The distance between geometric center of the heart and poster is less than distance threshold, and thus, it is possible to guarantee according to meeting specified pair of third condition
Object is specified to be in close to the position of poster geometric center in the poster that the image of elephant generates.
In one possible implementation, can control in poster generated specifies the degree of overlapping between object to be less than
Third threshold value, thus, it is possible to specify between object in the poster for guaranteeing to be generated according to the image for the specified object for meeting third condition
Degree of overlapping it is smaller.
The embodiment of the present disclosure passes through the key frame for meeting first condition if it does not exist, then interception meets third from key frame
The image of the specified object of condition, and according to the image for the specified object for meeting third condition, the poster of target video is generated, by
This can also automatically generate the poster of video when there is no the key frame for meeting first condition, save manpower, the poster energy of generation
The key content of enough reflecting videos, and the clarity of the poster generated is higher.
Fig. 4 shows the flow chart of the another exemplary of the method for the poster of the generation video according to one embodiment of the disclosure.
As shown in figure 4, this method may include step S41 to step S44.
In step S41, the specified object of target video is determined.
In the embodiments of the present disclosure, target video can be determined according to the dominant role information of target video or subtitle etc.
Specified object, be not limited thereto.
In step S42, the key frame of target video is determined.
Wherein, the description to step S11 is seen above to step S42.
In step S43, the clarity of key frame is obtained.
Wherein, the description to step S12 is seen above to step S43.
In step S44, meet the key frame of first condition if it exists, then target video is generated according to the first key frame
Poster, wherein the first key frame is the highest key frame of clarity in the key frame for meet first condition.
Wherein, the description to step S13 is seen above to step S44.
Fig. 5 shows an illustrative stream of the method and step S41 of the poster of the generation video according to one embodiment of the disclosure
Cheng Tu.As shown in figure 5, step S41 may include step S411 and step S412.
In step S411, the dominant role information of target video is obtained.
In one possible implementation, the corresponding cast of available target video is determined according to the cast
The dominant role information of target video.
In step S412, according to dominant role information, the specified object of target video is determined.
In one possible implementation, it can be obtained according to the performer's name or role name in dominant role information
The facial image of the specified object of target video.
Fig. 6 shows the another exemplary of the method and step S41 of the poster of the generation video according to one embodiment of the disclosure
Flow chart.As shown in fig. 6, step S41 may include step S413 and step S414.
In step S413, the subtitle of target video is obtained.
In the embodiments of the present disclosure, the subtitle of target video can be directly acquired, can also audio to target video into
Row text conversion obtains the subtitle of target video.
In step S414, which is analyzed, determines the specified object of target video.
In one possible implementation, the subtitle of target video can be analyzed, determines and goes out occurrence in subtitle
The name of the most N number of personage of number, and using N number of personage as specified object, wherein N is positive integer.
Fig. 7 shows the block diagram of the device of the poster of the generation video according to one embodiment of the disclosure.As shown in fig. 7, the dress
Set including：First determining module 71, for determining the key frame of target video；Module 72 is obtained, for obtaining the clear of key frame
Clear degree；First generation module 73 then generates target view according to the first key frame for meeting the key frame of first condition if it exists
The poster of frequency, wherein the first key frame is the highest key frame of clarity in the key frame for meet first condition.
In one possible implementation, first condition includes following one or more：Object is specified to account in key frame
The area ratio of key frame is greater than first threshold；The area ratio for specifying object to account for key frame in key frame is less than second threshold,
Wherein, second threshold is greater than first threshold；It is specified in the geometric center of object region and the geometry of key frame in key frame
The distance between heart is less than distance threshold；The degree of overlapping between object is specified to be less than third threshold value in key frame；Key frame middle finger
The posture for determining object meets posture condition；The expression of object is specified to meet expression condition in key frame.
In one possible implementation, the first determining module 71 is used for：Second condition will be met in target video
Video frame is determined as the key frame of target video, wherein second condition includes with the next item down or two：Video frame includes specified pair
As video frame includes subtitle.
Fig. 8 shows an illustrative block diagram of the device of the poster of the generation video according to one embodiment of the disclosure.Such as Fig. 8
It is shown：
In one possible implementation, the first generation module 73 includes：Submodule 731 is improved, if closing for first
The clarity of key frame then carries out the first key frame to improve clarity processing less than the 4th threshold value, and it is first crucial to make that treated
The clarity of frame is greater than or equal to the 4th threshold value；Submodule 732 is generated, for the first key frame to generate target according to treated
The poster of video.
In one possible implementation, which further includes：Interception module 74, for meeting first if it does not exist
The key frame of part then intercepts the image for meeting the specified object of third condition from key frame；Second generation module 75 is used for root
According to the image for the specified object for meeting third condition, the poster of target video is generated.
In one possible implementation, third condition includes with the next item down or two：The posture of specified object meets
Posture condition；The expression of specified object meets expression condition.
In one possible implementation, which further includes：Second determining module 76, for determining target video
Specified object.
In one possible implementation, the second determining module 76 includes：First acquisition submodule 761, for obtaining
The dominant role information of target video；First determines submodule 762, for determining target video according to dominant role information
Specified object.
In one possible implementation, the second determining module 76 includes：Second acquisition submodule 763, for obtaining
The subtitle of target video；Second determines that submodule 764 determines the specified object of target video for analyzing the subtitle.
The embodiment of the present disclosure passes through the key frame for determining target video, obtains the clarity of key frame, meets the if it exists
The key frame of one condition then generates the sea of target video according to the highest key frame of clarity in the key frame for meeting first condition
Report saves manpower thus, it is possible to automatically generate the poster of video, and the poster of generation is able to reflect the key content of video, and raw
At poster clarity it is higher.
Fig. 9 is shown according to an exemplary embodiment a kind of for generating the block diagram of the device 800 of the poster of video.Example
Such as, device 800 can be mobile phone, computer, digital broadcasting terminal, messaging device, game console, and plate is set
It is standby, Medical Devices, body-building equipment, personal digital assistant etc..
Referring to Fig. 9, device 800 may include following one or more components：Processing component 802, memory 804, power supply
Component 806, multimedia component 808, audio component 810, the interface 812 of input/output (I/O), sensor module 814, and
Communication component 816.
The integrated operation of the usual control device 800 of processing component 802, such as with display, telephone call, data communication, phase
Machine operation and record operate associated operation.Processing component 802 may include that one or more processors 820 refer to execute
It enables, to perform all or part of the steps of the methods described above.In addition, processing component 802 may include one or more modules, just
Interaction between processing component 802 and other assemblies.For example, processing component 802 may include multi-media module, it is more to facilitate
Interaction between media component 808 and processing component 802.
Memory 804 is configured as storing various types of data to support the operation in device 800.These data are shown
Example includes the instruction of any application or method for operating on device 800, contact data, and telephone book data disappears
Breath, picture, video etc..Memory 804 can be by any kind of volatibility or non-volatile memory device or their group
It closes and realizes, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM) is erasable to compile
Journey read-only memory (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash
Device, disk or CD.
Power supply module 806 provides electric power for the various assemblies of device 800.Power supply module 806 may include power management system
System, one or more power supplys and other with for device 800 generate, manage, and distribute the associated component of electric power.
Multimedia component 808 includes the screen of one output interface of offer between described device 800 and user.One
In a little embodiments, screen may include liquid crystal display (LCD) and touch panel (TP).If screen includes touch panel, screen
Curtain may be implemented as touch screen, to receive input signal from the user.Touch panel includes one or more touch sensings
Device is to sense the gesture on touch, slide, and touch panel.The touch sensor can not only sense touch or sliding gesture
Boundary, but also detect duration and pressure associated with the touch or slide operation.In some embodiments, more matchmakers
Body component 808 includes a front camera and/or rear camera.When device 800 is in operation mode, such as screening-mode or
When video mode, front camera and/or rear camera can receive external multi-medium data.Each front camera and
Rear camera can be a fixed optical lens system or have focusing and optical zoom capabilities.
Audio component 810 is configured as output and/or input audio signal.For example, audio component 810 includes a Mike
Wind (MIC), when device 800 is in operation mode, when such as call mode, recording mode, and voice recognition mode, microphone is matched
It is set to reception external audio signal.The received audio signal can be further stored in memory 804 or via communication set
Part 816 is sent.In some embodiments, audio component 810 further includes a loudspeaker, is used for output audio signal.
I/O interface 812 provides interface between processing component 802 and peripheral interface module, and above-mentioned peripheral interface module can
To be keyboard, click wheel, button etc..These buttons may include, but are not limited to：Home button, volume button, start button and lock
Determine button.
Sensor module 814 includes one or more sensors, and the state for providing various aspects for device 800 is commented
Estimate.For example, sensor module 814 can detecte the state that opens/closes of device 800, and the relative positioning of component, for example, it is described
Component is the display and keypad of device 800, and sensor module 814 can be with 800 1 components of detection device 800 or device
Position change, the existence or non-existence that user contacts with device 800,800 orientation of device or acceleration/deceleration and device 800
Temperature change.Sensor module 814 may include proximity sensor, be configured to detect without any physical contact
Presence of nearby objects.Sensor module 814 can also include optical sensor, such as CMOS or ccd image sensor, at
As being used in application.In some embodiments, which can also include acceleration transducer, gyro sensors
Device, Magnetic Sensor, pressure sensor or temperature sensor.
Communication component 816 is configured to facilitate the communication of wired or wireless way between device 800 and other equipment.Device
800 can access the wireless network based on communication standard, such as WiFi, 2G or 3G or their combination.In an exemplary implementation
In example, communication component 816 receives broadcast singal or broadcast related information from external broadcasting management system via broadcast channel.
In one exemplary embodiment, the communication component 816 further includes near-field communication (NFC) module, to promote short range communication.Example
Such as, NFC module can be based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra wide band (UWB) technology,
Bluetooth (BT) technology and other technologies are realized.
In the exemplary embodiment, device 800 can be believed by one or more application specific integrated circuit (ASIC), number
Number processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array
(FPGA), controller, microcontroller, microprocessor or other electronic components are realized, for executing the above method.
In the exemplary embodiment, a kind of non-volatile computer readable storage medium storing program for executing is additionally provided, for example including calculating
The memory 804 of machine program instruction, above-mentioned computer program instructions can be executed above-mentioned to complete by the processor 820 of device 800
Method.
Figure 10 is shown according to an exemplary embodiment a kind of for generating the block diagram of the device 1900 of the poster of video.
For example, device 1900 may be provided as a server.Referring to Fig.1 0, device 1900 includes processing component 1922, further
It, can be by processing component for storing including one or more processors and memory resource represented by a memory 1932
The instruction of 1922 execution, such as application program.The application program stored in memory 1932 may include one or one with
On each correspond to one group of instruction module.In addition, processing component 1922 is configured as executing instruction, to execute above-mentioned side
Method.
Device 1900 can also include that a power supply module 1926 be configured as the power management of executive device 1900, and one
Wired or wireless network interface 1950 is configured as device 1900 being connected to network and input and output (I/O) interface
1958.Device 1900 can be operated based on the operating system for being stored in memory 1932, such as Windows ServerTM, Mac
OS XTM, UnixTM, LinuxTM, FreeBSDTM or similar.
In the exemplary embodiment, a kind of non-volatile computer readable storage medium storing program for executing is additionally provided, for example including calculating
The memory 1932 of machine program instruction, above-mentioned computer program instructions can be executed by the processing component 1922 of device 1900 to complete
The above method.
The disclosure can be system, method and/or computer program product.Computer program product may include computer
Readable storage medium storing program for executing, containing for making processor realize the computer-readable program instructions of various aspects of the disclosure.
Computer readable storage medium, which can be, can keep and store the tangible of the instruction used by instruction execution equipment
Equipment.Computer readable storage medium for example can be-- but it is not limited to-- storage device electric, magnetic storage apparatus, optical storage
Equipment, electric magnetic storage apparatus, semiconductor memory apparatus or above-mentioned any appropriate combination.Computer readable storage medium
More specific example (non exhaustive list) includes：Portable computer diskette, random access memory (RAM), read-only is deposited hard disk
It is reservoir (ROM), erasable programmable read only memory (EPROM or flash memory), static random access memory (SRAM), portable
Compact disk read-only memory (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanical coding equipment, for example thereon
It is stored with punch card or groove internal projection structure and the above-mentioned any appropriate combination of instruction.Calculating used herein above
Machine readable storage medium storing program for executing is not interpreted that instantaneous signal itself, the electromagnetic wave of such as radio wave or other Free propagations lead to
It crosses the electromagnetic wave (for example, the light pulse for passing through fiber optic cables) of waveguide or the propagation of other transmission mediums or is transmitted by electric wire
Electric signal.
Computer-readable program instructions as described herein can be downloaded to from computer readable storage medium it is each calculate/
Processing equipment, or outer computer or outer is downloaded to by network, such as internet, local area network, wide area network and/or wireless network
Portion stores equipment.Network may include copper transmission cable, optical fiber transmission, wireless transmission, router, firewall, interchanger, gateway
Computer and/or Edge Server.Adapter or network interface in each calculating/processing equipment are received from network to be counted
Calculation machine readable program instructions, and the computer-readable program instructions are forwarded, for the meter being stored in each calculating/processing equipment
In calculation machine readable storage medium storing program for executing.
Computer program instructions for executing disclosure operation can be assembly instruction, instruction set architecture (ISA) instructs,
Machine instruction, machine-dependent instructions, microcode, firmware instructions, condition setup data or with one or more programming languages
The source code or object code that any combination is write, the programming language include the programming language-of object-oriented such as
Smalltalk, C++ etc., and conventional procedural programming languages-such as " C " language or similar programming language.Computer
Readable program instructions can be executed fully on the user computer, partly execute on the user computer, be only as one
Vertical software package executes, part executes on the remote computer or completely in remote computer on the user computer for part
Or it is executed on server.In situations involving remote computers, remote computer can pass through network-packet of any kind
It includes local area network (LAN) or wide area network (WAN)-is connected to subscriber computer, or, it may be connected to outer computer (such as benefit
It is connected with ISP by internet).In some embodiments, by utilizing computer-readable program instructions
Status information carry out personalized customization electronic circuit, such as programmable logic circuit, field programmable gate array (FPGA) or can
Programmed logic array (PLA) (PLA), the electronic circuit can execute computer-readable program instructions, to realize each side of the disclosure
Face.
Referring herein to according to the flow chart of the method, apparatus (system) of the embodiment of the present disclosure and computer program product and/
Or block diagram describes various aspects of the disclosure.It should be appreciated that flowchart and or block diagram each box and flow chart and/
Or in block diagram each box combination, can be realized by computer-readable program instructions.
These computer-readable program instructions can be supplied to general purpose computer, special purpose computer or other programmable datas
The processor of processing unit, so that a kind of machine is produced, so that these instructions are passing through computer or other programmable datas
When the processor of processing unit executes, function specified in one or more boxes in implementation flow chart and/or block diagram is produced
The device of energy/posture.These computer-readable program instructions can also be stored in a computer-readable storage medium, these refer to
It enables so that computer, programmable data processing unit and/or other equipment work in a specific way, thus, it is stored with instruction
Computer-readable medium then includes a manufacture comprising in one or more boxes in implementation flow chart and/or block diagram
The instruction of the various aspects of defined function/posture.
Computer-readable program instructions can also be loaded into computer, other programmable data processing units or other
In equipment, so that series of operation steps are executed in computer, other programmable data processing units or other equipment, to produce
Raw computer implemented process, so that executed in computer, other programmable data processing units or other equipment
Instruct function/posture specified in one or more boxes in implementation flow chart and/or block diagram.
The flow chart and block diagram in the drawings show system, method and the computer journeys according to multiple embodiments of the disclosure
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
One module of table, program segment or a part of instruction, the module, program segment or a part of instruction include one or more use
The executable instruction of the logic function as defined in realizing.In some implementations as replacements, function marked in the box
It can occur in a different order than that indicated in the drawings.For example, two continuous boxes can actually be held substantially in parallel
Row, they can also be executed in the opposite order sometimes, and this depends on the function involved.It is also noted that block diagram and/or
The combination of each box in flow chart and the box in block diagram and or flow chart, can the function as defined in executing or appearance
The dedicated hardware based system of state is realized, or can be realized using a combination of dedicated hardware and computer instructions.
The presently disclosed embodiments is described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle, practical application or technological improvement to the technology in market for best explaining each embodiment, or lead this technology
Other those of ordinary skill in domain can understand each embodiment disclosed herein.
Claims (20)
1. a kind of method for the poster for generating video, which is characterized in that including：
Determine the key frame of target video；
Obtain the clarity of the key frame；
Meet the key frame of first condition if it exists, then generate the poster of the target video according to the first key frame, wherein institute
Stating the first key frame is the highest key frame of clarity in the key frame for meet the first condition.
2. the method according to claim 1, wherein the first condition includes following one or more：
The area ratio for specifying object to account for the key frame in the key frame is greater than first threshold；
The area ratio for specifying object to account for the key frame described in the key frame is less than second threshold, wherein described second
Threshold value is greater than the first threshold；
Described in the key frame specify object region geometric center and the key frame geometric center between away from
From less than distance threshold；
The degree of overlapping between object is specified to be less than third threshold value described in the key frame；
The posture of object is specified to meet posture condition described in the key frame；
The expression of object is specified to meet expression condition described in the key frame.
3. the method according to claim 1, wherein determine target video key frame, including：
The video frame for meeting second condition in the target video is determined as to the key frame of the target video,
Wherein, the second condition includes with the next item down or two：
The video frame includes specified object,
The video frame includes subtitle.
4. the method according to claim 1, wherein generating the sea of the target video according to the first key frame
Report, including：
If the clarity of first key frame improve at clarity less than the 4th threshold value, to first key frame
The clarity of reason, first key frame that makes that treated is greater than or equal to the 4th threshold value；
According to the poster of treated the first key frame the generates target video.
5. the method according to claim 1, wherein after the clarity for obtaining the key frame, the side
Method further includes：
Meet the key frame of the first condition if it does not exist, then intercepts specified pair for meeting third condition from the key frame
The image of elephant；
According to the image for the specified object for meeting the third condition, the poster of the target video is generated.
6. according to the method described in claim 5, it is characterized in that, the third condition includes with the next item down or two：
The posture of the specified object meets posture condition；
The expression of the specified object meets expression condition.
7. method as claimed in any of claims 2 to 6, which is characterized in that in the key frame for determining target video
Before, the method also includes：
Determine the specified object of the target video.
8. the method according to the description of claim 7 is characterized in that determine the specified object of the target video, including：
Obtain the dominant role information of the target video；
According to the dominant role information, the specified object of the target video is determined.
9. the method according to the description of claim 7 is characterized in that determine the specified object of the target video, including：
Obtain the subtitle of the target video；
The subtitle is analyzed, determines the specified object of the target video.
10. a kind of device for the poster for generating video, which is characterized in that including：
First determining module, for determining the key frame of target video；
Module is obtained, for obtaining the clarity of the key frame；
First generation module then generates the target according to the first key frame for meeting the key frame of first condition if it exists
The poster of video, wherein first key frame is the highest key frame of clarity in the key frame for meet the first condition.
11. device according to claim 10, which is characterized in that the first condition includes following one or more：
The area ratio for specifying object to account for the key frame in the key frame is greater than first threshold；
The area ratio for specifying object to account for the key frame described in the key frame is less than second threshold, wherein described second
Threshold value is greater than the first threshold；
Described in the key frame specify object region geometric center and the key frame geometric center between away from
From less than distance threshold；
The degree of overlapping between object is specified to be less than third threshold value described in the key frame；
The posture of object is specified to meet posture condition described in the key frame；
The expression of object is specified to meet expression condition described in the key frame.
12. device according to claim 10, which is characterized in that first determining module is used for：
The video frame for meeting second condition in the target video is determined as to the key frame of the target video,
Wherein, the second condition includes with the next item down or two：
The video frame includes specified object,
The video frame includes subtitle.
13. the apparatus according to claim 1, which is characterized in that first generation module includes：
Improve submodule, if the clarity for first key frame less than the 4th threshold value, to first key frame into
Row improves clarity processing, and the clarity for first key frame that makes that treated is greater than or equal to the 4th threshold value；
Submodule is generated, for the poster according to treated the first key frame the generates target video.
14. device according to claim 10, which is characterized in that described device further includes：
Interception module, for meeting the key frame of the first condition if it does not exist, then interception meets the from the key frame
The image of the specified object of three conditions；
Second generation module generates the target video for the image according to the specified object for meeting the third condition
Poster.
15. device according to claim 14, which is characterized in that the third condition includes with the next item down or two：
The posture of the specified object meets posture condition；
The expression of the specified object meets expression condition.
16. device described in any one of 1 to 15 according to claim 1, which is characterized in that described device further includes：
Second determining module, for determining the specified object of the target video.
17. device according to claim 16, which is characterized in that second determining module includes：
First acquisition submodule, for obtaining the dominant role information of the target video；
First determines submodule, for determining the specified object of the target video according to the dominant role information.
18. device according to claim 16, which is characterized in that second determining module includes：
Second acquisition submodule, for obtaining the subtitle of the target video；
Second determines that submodule determines the specified object of the target video for analyzing the subtitle.
19. a kind of device for the poster for generating video, which is characterized in that including：
Processor；
Memory for storage processor executable instruction；
Wherein, the processor is configured to method described in any one of perform claim requirement 1 to 9.
20. a kind of non-volatile computer readable storage medium storing program for executing, is stored thereon with computer program instructions, which is characterized in that institute
It states and realizes method described in any one of claim 1 to 9 when computer program instructions are executed by processor.
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| CN201810637904.3A CN108833939A (en) | 2018-06-20 | 2018-06-20 | Generate the method and device of the poster of video |
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| CN201810637904.3A CN108833939A (en) | 2018-06-20 | 2018-06-20 | Generate the method and device of the poster of video |
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