WO2019041661A1 - Procédé et dispositif de production d'extrait vidéo - Google Patents

Procédé et dispositif de production d'extrait vidéo Download PDF

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Publication number
WO2019041661A1
WO2019041661A1 PCT/CN2017/117167 CN2017117167W WO2019041661A1 WO 2019041661 A1 WO2019041661 A1 WO 2019041661A1 CN 2017117167 W CN2017117167 W CN 2017117167W WO 2019041661 A1 WO2019041661 A1 WO 2019041661A1
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WIPO (PCT)
Prior art keywords
slices
video
slice
target
moving
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PCT/CN2017/117167
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English (en)
Chinese (zh)
Inventor
许芳
丁美玉
赵波
晋兆龙
陈卫东
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苏州科达科技股份有限公司
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Publication of WO2019041661A1 publication Critical patent/WO2019041661A1/fr

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    • 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
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8352—Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]
    • 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
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • 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
    • H04N21/858—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot
    • H04N21/8586—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot by using a URL

Definitions

  • the present invention relates to the field of video processing technologies, and in particular, to a video summary generation method and apparatus.
  • Video as a major type of multimedia, has played an increasingly prominent role in enriching people's lives, education, and entertainment. How to effectively organize, manage, query, retrieve and browse video data becomes an urgent problem to be solved.
  • Video summary is an effective way to solve the above problems.
  • Video summary also known as video enrichment, refers to a simple summary of video content.
  • video enrichment In an automatic or semi-automatic way, first through moving target analysis, extracting moving targets, and then targeting each target. The motion trajectory is analyzed, and different targets are spliced into a common background scene, and they are combined in some way.
  • Video summaries play an important role in video analytics and content-based video retrieval. Usually a few hours of video, you can condense into a few minutes of concentrated video, greatly speeding up the video viewing speed.
  • the inventor In the method for generating the video summary of the inventor, the inventor firstly analyzes the video content from the going to the rear, extracts the moving target, and then analyzes the motion trajectory of each target.
  • the method for generating a video digest has different time for generating video digests for video content of different durations.
  • the digest generation time is relatively long and inefficient.
  • the embodiments of the present invention provide a method and a device for generating a video digest to solve the problem of long time and low efficiency in generating video digests for video content with a long duration.
  • a first aspect of the present invention provides a video summary generating method, including the following steps:
  • the analysis result of the moving target is concentrated and displayed by using the sequence of the plurality of slices to generate a video summary of the to-be-processed video.
  • the method further includes:
  • a unique identifier is generated for each of the slices, and the identifier corresponding to each slice also corresponds to its location in the to-be-processed video.
  • the performing a target analysis task for each of the slices separately, and obtaining an analysis result of the moving target in each of the slices including:
  • the identifiers corresponding to the moving targets are merged into one.
  • the first thread is started to perform a condensed calculation on the analysis result of the moving target by using the sequence of the multiple slices to generate a video summary of the to-be-processed video
  • the second thread is started to Concentrate the calculated video summary for display.
  • the concentrating calculation of the analysis result of the moving target by using the sequence of the plurality of slices comprises:
  • the video image is extracted in turn based on the sorted moving objects in the slice.
  • a second aspect of the present invention provides a video summary generating apparatus, including:
  • a first acquiring unit configured to acquire a video to be processed
  • a slice dividing unit configured to divide the to-be-processed video into multiple slices
  • a processing unit configured to open a plurality of threads corresponding to the plurality of slices one by one, perform target analysis tasks for each of the slices separately, and obtain an analysis result of the moving targets in each of the slices;
  • a concentrating unit configured to perform a condensed calculation on the analysis result of the moving target by using a sequence of the plurality of slices to generate a video summary of the to-be-processed video.
  • the video summary generating apparatus further includes:
  • a recording unit for recording the starting and ending position of each slice
  • a marking unit configured to generate a unique identifier for each of the slices, and the identifier corresponding to each slice also corresponds to a location in the to-be-processed video.
  • the processing unit includes:
  • a first obtaining subunit configured to acquire a moving target in each of the slices
  • a marking subunit configured to generate an identifier of a moving target of each of the slices by using a sequence of the plurality of slices
  • a second acquiring subunit configured to acquire a moving target that appears in an adjacent slice at an adjacent moment
  • a determining subunit configured to determine, according to the location feature of the moving target, whether the moving targets of the adjacent slices appearing at the adjacent moments are the same;
  • the merging subunit is configured to combine the identifiers corresponding to the moving objects into one when it is determined that the moving targets of the adjacent slices appearing at the same time are the same.
  • the concentration unit includes:
  • a sorting subunit configured to sort the slices according to the identifier of the slice
  • extracting a subunit configured to sequentially extract a video image according to the sorted moving target in the slice.
  • a third aspect of the present invention provides an image processing apparatus including at least one processor; and a memory communicably coupled to the at least one processor; wherein the memory stores instructions executable by the one processor, The instructions are executed by the at least one processor to cause the at least one processor to perform the video summary generation method of any of the first or first aspect of the invention.
  • a fourth aspect of the invention provides a non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the first or first aspect of the invention
  • the video summary generation method according to any one of the preceding claims.
  • a fifth aspect of the invention provides a computer program product comprising a computing program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer
  • the computer is configured to perform the video summary generation method described in the first aspect or any one of the optional aspects of the first aspect.
  • the video summary generating method includes the following steps: acquiring a to-be-processed video; dividing the to-be-processed video into multiple slices; and opening multiple threads corresponding to the multiple slices one by one, respectively Performing a target analysis task for each of the slices, obtaining an analysis result of the moving target in each of the slices; performing a concentration calculation on the analysis result of the moving target by using the sequence of the plurality of slices to generate the A video summary of the pending video.
  • the video summary generation method provided by the embodiment of the present invention uses a multi-thread to process a target analysis task of a video in parallel, and then comprehensively condenses the distributed analysis result to generate a video summary, so as to achieve the purpose of browsing all the contents of the video in a short time. , which greatly reduces the waiting time.
  • the video summary generating method provided by the embodiment of the present invention, after dividing the to-be-processed video into a plurality of slices, further comprising: recording a start and end position of each slice; generating a unique identifier for each of the slices
  • the identifier corresponding to each slice also corresponds to its location in the to-be-processed video.
  • by assigning a unique identifier to each slice it is convenient to save the target analysis result in different slices according to the identifier when performing target analysis on all the slices at the same time, thereby avoiding the storage result between the storage results. conflict.
  • the video summary generating method provided by the embodiment of the present invention, wherein the first thread is started to perform a condensed calculation on the analysis result of the moving target by using the sequence of the plurality of slices to generate the to-be-processed video.
  • the video summary is simultaneously opened by the second thread to display the video summary obtained by the concentration calculation.
  • the segmentation and concentration calculation of the moving target in the slice is performed, and the concentration calculation and the concentration display are performed in two threads concurrently, thereby achieving the purpose of displaying the edge while processing, thereby solving the target in the to-be-processed video. More, need It takes a lot of time to wait for the target to be concentrated.
  • the method for generating a video summary wherein the concentrating calculation of the analysis result of the moving target by using the sequence of the plurality of slices comprises: performing the slice according to the identifier of the slice Sorting; sequentially extracting video images from the moving targets in the sorted slices.
  • the target analysis is performed on all the slices at the same time, and the analysis result can be stored in different places. Therefore, the position of each slice in the video can be restored by the identifier of the slice, thereby avoiding confusion of the slice sequence, thereby The conditions for extracting video images from moving targets are provided.
  • the video summary generating apparatus includes: a first acquiring unit, configured to acquire a video to be processed; a slice dividing unit, configured to divide the to-be-processed video into multiple slices; and a processing unit, configured to: Opening a plurality of threads corresponding to the plurality of slices one by one, performing a target analysis task for each of the slices separately, obtaining an analysis result of the moving target in each slice; and a concentrating unit, configured to utilize the plurality of The sequence of the slices is used to perform a condensed calculation on the analysis result of the moving target to generate a video summary of the to-be-processed video.
  • the video summary generating apparatus processes a target analysis task of a video by using multiple threads in parallel, and then comprehensively condenses the distributed analysis results to generate a video summary, so as to achieve the purpose of browsing all the contents of the video in a short time. , which greatly reduces the waiting time.
  • FIG. 1 is a flowchart showing a specific schematic diagram of a video digest generating method in Embodiment 1 of the present invention
  • FIG. 2 is a flowchart showing a specific schematic diagram of a video summary generating method in Embodiment 2 of the present invention
  • FIG. 3 is a flowchart showing a specific schematic diagram of a video digest generating method in Embodiment 3 of the present invention.
  • Figure 4 is a diagram showing a specific schematic of the video summary generating apparatus in Embodiment 4 of the present invention.
  • FIG. 5 is a block diagram showing a specific schematic diagram of a processing unit in Embodiment 4 of the present invention.
  • Figure 6 is a block diagram showing a specific schematic diagram of a concentration unit in Embodiment 4 of the present invention.
  • Fig. 7 is a block diagram showing a specific schematic diagram of an image processing apparatus in Embodiment 5 of the present invention.
  • This embodiment provides a video summary generation method for use in a video summary generating device. As shown in FIG. 1, the video summary generating method includes the following steps:
  • step S11 a video to be processed is obtained.
  • the video to be processed in this embodiment may be a video that is previously stored in the video summary generating device, or that is acquired by the video summary generating device from the outside world in real time, or may be a video segment extracted by the video summary generating device from a video.
  • step S12 the video to be processed is divided into a plurality of slices.
  • the number of slices can be divided according to the processing capability of the video summary generating device. For example, according to the ability of the hardware circuit to process data in the video summary device, the maximum amount of data that can be concurrently processed can be determined, and the division of the to-be-processed video can be performed according to the amount of data.
  • all slices constitute a complete pending video
  • several video frames may be included in each slice, and each frame includes several targets.
  • Step S13 Open a plurality of threads corresponding to the plurality of slices one by one, perform target analysis tasks for each slice separately, and obtain an analysis result of the moving target in each slice.
  • each of the threads is separately executed in the video summary generating device.
  • the number of threads to be opened is equal to the number of slices divided by the video to be processed, that is, the target analysis task of performing all slices simultaneously in the video summary generating device can be achieved.
  • the analysis results of the moving targets in each slice can be saved in different paths, or can be distinguished by different tags in the same path.
  • step S14 the analysis result of the moving target is concentrated and calculated by using the sequence of the plurality of slices to generate a video summary of the video to be processed.
  • step S13 all the slices are simultaneously subjected to the target analysis task, and the analysis results of the moving targets in each slice are not necessarily maintained in the original sequential relationship. Therefore, when performing the condensed calculation of the analysis result of the moving target, it is necessary to follow the order of the slices, so that the disorder of the slicing order can be avoided.
  • the video summary generation method provided in this embodiment uses a multi-thread to process a target analysis task of a video in parallel, and then comprehensively condenses the distributed analysis results to generate a video summary, so as to achieve the purpose of browsing all the contents of the video in a short time. This greatly reduces the waiting time, and the effect is better for video content with a longer duration.
  • This embodiment provides a video summary generation method for use in a video summary generating device. As shown in FIG. 2, the video summary generation method includes the following steps:
  • Step S21 Acquire a video to be processed. The same as step S11 of Embodiment 1, and details are not described herein again.
  • step S22 the video to be processed is divided into a plurality of slices.
  • the video to be processed is divided into a plurality of slice files by previewing the total duration of the video to be processed in the video summary generating device and according to the capability of processing data of the hardware circuit in the video summary generating device.
  • the start and end positions of each slice are recorded for subsequent decoding operations on the slices before performing the target analysis task for each slice.
  • a unique identifier is generated for each slice, the size of the identifier corresponding to the position of the slice in the video to be processed; that is, the size of the identifier and the time sequence of the slice in the video to be processed remain Consistent, so that the adjacent front and back slices can be quickly found by the logo.
  • the identifier in this embodiment may be represented by a numerical value or a character. Among them, the value or character is set in order according to the time of the slice in the video to be processed.
  • the identifier in this embodiment is represented by a numerical value. For example, use 1, 2, 3, ..., in turn as the identifier of the slice.
  • Step S23 opening a plurality of threads corresponding to the plurality of slices one by one, respectively performing target analysis tasks for each slice, and obtaining an analysis result of the moving targets in each slice.
  • the target analysis task for each slice is separately performed by turning on a plurality of threads in the video summary generating device.
  • the number of threads to be opened is equal to the number of slices divided by the video to be processed, that is, the target analysis task of performing all slices simultaneously in the video summary generating device can be achieved.
  • each slice includes several targets, so in the present embodiment, by assigning a unique identifier to each target in each slice, the target is distinguished, so that the target in the pending video is unique. logo.
  • performing a target analysis task for each slice separately, and obtaining an analysis result of the moving target in each slice including the following steps:
  • Step S231 acquiring a moving target in each slice.
  • a small segment of each slice is quickly analyzed to obtain a static background of a stable slice; then, according to the static background, the target in the slice that does not belong to the static background is extracted. , that is, the goal of sports.
  • the static background is not static for some scenes in the slice, and any moving to a stationary target will become part of the background. Therefore, it is necessary to constantly update the background and save each changed background. And an image of the target track in each of the to-be-processed videos, specifically, a time period in which the background image disappears, and a position in the video to be processed.
  • Step S232 generating an identifier of the moving target of each slice by using the sequence of the plurality of slices.
  • each slice includes a plurality of targets, and each target in each slice is assigned a unique identifier for distinguishing the target, thereby achieving the target in the to-be-processed video.
  • a unique identifier There is a unique identifier.
  • the identifier can be identified by a numerical value or by a character.
  • the number of targets appearing in each slice may be determined in advance, and then the start identifier of the target in each slice is sequentially set according to the order of the slices, and the difference between the start identifiers of the connected slices is greater than or equal to the pre-determined The number of targets in each slice.
  • the target identifier in each slice may be sequentially incremented according to the order in which the target appears, on the basis of the initial identifier.
  • each slice in the video to be processed and the identifier of the target in each slice are as follows:
  • the first column of each row represents each slice in the to-be-processed video and its corresponding identifier
  • the remaining columns in each row represent the target in the slice represented in the first column and its corresponding identifier.
  • slice (001) identifies the slice as 001
  • target (001001) represents the first target in slice (001)
  • the target's identity is 001001; the rest, and so on.
  • each slice includes a plurality of video frames, and in the process of performing target analysis in the slice, the same target is merged for the adjacent frames, thereby avoiding that the same target in the adjacent video frames is given different Logo.
  • the moving target extracted from each frame of the slice is matched before and after according to the position feature of the moving target, and the target with the matching match is given the same identifier, and the matching is successful.
  • the identity of the target remains the same.
  • the target information of the merged process is saved, and specifically, the information includes the target track, the appearance and disappearance time, and the like.
  • Step S233 Acquire a moving target that appears in an adjacent slice at an adjacent moment.
  • the adjacent slice is obtained by using the identifier of the current slice, and the current slice and the adjacent target slice are respectively acquired at the adjacent time, and the corresponding target is acquired at the same time.
  • the identification of the moving target is obtained by using the identifier of the current slice, and the current slice and the adjacent target slice are respectively acquired at the adjacent time, and the corresponding target is acquired at the same time.
  • Step S234 judging whether the moving targets appearing at the adjacent moments of the adjacent slices are the same according to the position feature of the moving target. If the result of the determination is yes, then step S235 is performed; otherwise, step S24 is performed.
  • the positional feature of the obtained moving target is calculated by the tracking algorithm. If the calculated positional images of the moving target overlap, it means that the adjacent moving objects appear at the same time are the same; if the calculated If the position pictures of the moving objects do not overlap, it means that the adjacent slices have different moving targets at the adjacent moments.
  • step S235 the identifiers corresponding to the moving targets are merged into one.
  • the same target is given the same identifier.
  • the merging of the same target is for the purpose of not considering the content of the puncturing point when slicing the video to be processed, which will result in the same target in the real video at the segmentation point (ie, the character or The vehicle is allocated in two slices, then the same target will have different identifiers in each slice; if the same target is not merged, then the same target will be different in the subsequent target concentration calculation. Time appears.
  • the adjacent slices are acquired according to the identifier of the slice, and whether the moving targets of the adjacent slices appearing at the adjacent time are the same, and if they are the same, the same identifier is given, thereby Achieve the same goal at the same time.
  • step S24 the analysis result of the moving target is concentrated and calculated by using the sequence of the plurality of slices to generate a video summary of the video to be processed.
  • step S14 of Embodiment 1 the same as step S14 of Embodiment 1, and details are not described herein again.
  • This embodiment provides a video summary generation method for use in a video summary generating device. As shown in FIG. 3, the video summary generating method includes the following steps:
  • Step S31 acquiring a video to be processed. The same as step S21 of Embodiment 2, and details are not described herein again.
  • step S32 the video to be processed is divided into a plurality of slices. The same as step S22 of Embodiment 2, and details are not described herein again.
  • Step S33 opening a plurality of threads corresponding to the plurality of slices one by one, respectively performing target analysis tasks for each slice, and obtaining an analysis result of the moving targets in each slice.
  • step S23 of Embodiment 2 The same as step S23 of Embodiment 2, and details are not described herein again.
  • step S34 the analysis result of the moving target is concentrated and calculated by using the sequence of the plurality of slices to generate a video summary of the video to be processed.
  • the first thread is started by the video summary generating device to perform a condensed calculation on the analysis result of the moving target by using the sequence of the plurality of slices to generate a video summary of the to-be-processed video, and simultaneously open the second thread to the concentrated calculation.
  • the resulting video summary is displayed.
  • the analysis result of the moving target is concentrated and calculated by using the sequence of the plurality of slices, and the following steps are included:
  • step S341 the slices are sorted according to the identifier of the slice.
  • the video summary generating device extracts the target analysis result of each slice from each storage path, and starts the first thread, and sorts the extracted slice according to the identifier of the slice.
  • the moving targets in each slice are sequentially read from the back to the rear, and when a certain number of moving targets is read, the reading operation is stopped first; the moving targets that have been read are arranged, and then Start the second thread and display the results of the layout calculation. Repeat the process of reading, calculating, and displaying until all targets have been processed.
  • the purpose of the edge processing and the display can be realized, thereby solving the target in the to-be-processed video.
  • the number is large, and it takes a lot of time to wait for the target to be concentrated.
  • the first obtaining unit 41 is configured to acquire a video to be processed.
  • the slice dividing unit 42 is configured to divide the to-be-processed video into multiple slices.
  • the concentrating unit 44 is configured to perform condensed calculation on the analysis result of the moving target by using the sequence of the plurality of slices to generate a video summary of the video to be processed.
  • the first obtaining subunit 431 is configured to acquire a moving target in each slice.
  • the marking sub-unit 432 is configured to generate an identification of the moving target of each slice by using the sequence of the plurality of slices.
  • the second obtaining sub-unit 433 is configured to acquire a moving target that appears in an adjacent slice at an adjacent moment.
  • the determining sub-unit 434 is configured to determine, according to the position feature of the moving target, whether the moving targets of the adjacent slices appearing at the adjacent moments are the same.
  • the merging sub-unit 435 is configured to determine the moving target phase of the adjacent slice at the adjacent moment At the same time, the logos corresponding to the moving targets are merged into one.
  • the concentrating unit 44 includes:
  • the sorting sub-unit 441 is configured to sort the slices according to the identifier of the slice.
  • the extracting sub-unit 442 is configured to sequentially extract a video image according to the moving target in the sorted slice.
  • FIG. 7 is a schematic diagram showing the hardware structure of an image processing apparatus according to an embodiment of the present invention. As shown in FIG. 7, the apparatus includes one or more processors 51 and a memory 52. One processor 51 is taken as an example in FIG.
  • the memory 52 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to use of the video summary generating device, and the like.
  • the memory 52 can include a high speed
  • the machine access memory may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device.
  • memory 52 can optionally include memory remotely located relative to processor 51, which can be connected to the video summary generating device over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • the one or more modules are stored in the memory 52, and when executed by the one or more processors 51, the video summary generating method described in any one of Embodiments 1 to 3 is performed.
  • the above product can perform the method provided by the embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.
  • the technical details that are not described in detail in this embodiment, refer to the related description in the embodiment shown in FIG.
  • the embodiment of the present invention further provides a non-transitory computer storage medium storing computer executable instructions, which can execute the video according to any one of Embodiments 1 to 3. Summary generation method.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk (Hard). Disk Drive, abbreviated as: HDD) or Solid-State Drive (SSD), etc.; the storage medium may also include a combination of the above types of memories.

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Abstract

La présente invention concerne un procédé et un dispositif de production d'un extrait vidéo. Le procédé comprend les étapes suivantes consistant à : obtenir une vidéo à traiter ; diviser la vidéo à traiter en une pluralité de segments ; démarrer une pluralité de fils en correspondance biunivoque avec la pluralité de segments et exécuter respectivement une tâche d'analyse cible sur chaque segment pour obtenir un résultat d'analyse d'une cible mobile dans chaque segment ; et effectuer un calcul de concentration sur les résultats d'analyse des cibles mobiles sur la base d'un ordre séquentiel de la pluralité de segments pour produire un extrait vidéo de la vidéo à traiter. Selon le procédé de production d'extrait vidéo fourni par des modes de réalisation de l'invention, en traitant des tâches d'analyse cibles d'une vidéo à l'aide de multiples fils en parallèle, puis en effectuant une concentration intégrée sur les résultats d'analyse dispersés pour produire un extrait vidéo, un objectif de navigation de tout le contenu de la vidéo dans un court laps de temps est obtenu et, par conséquent, le temps d'attente est significativement réduit.
PCT/CN2017/117167 2017-08-31 2017-12-19 Procédé et dispositif de production d'extrait vidéo WO2019041661A1 (fr)

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CN109862396A (zh) * 2019-01-11 2019-06-07 苏州科达科技股份有限公司 一种视频码流的分析方法、电子设备及可读存储介质
CN110087144A (zh) * 2019-05-15 2019-08-02 深圳市商汤科技有限公司 视频文件处理方法、装置、电子设备和计算机存储介质
CN110336824B (zh) * 2019-07-10 2021-12-03 中国民航信息网络股份有限公司 一种弱口令检测方法、检测控制设备及弱口令检测***
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