WO2022166258A1 - 行为识别方法、装置、终端设备及计算机可读存储介质 - Google Patents
行为识别方法、装置、终端设备及计算机可读存储介质 Download PDFInfo
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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
- H04N21/845—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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/356—Image reproducers having separate monoscopic and stereoscopic modes
- H04N13/359—Switching between monoscopic and stereoscopic modes
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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]
- H04N21/40—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
Definitions
- the present application belongs to the technical field of image processing, and in particular, relates to a method, apparatus, terminal device and computer-readable storage medium for behavior recognition.
- Video-based behavior recognition technology refers to a technology that recognizes the type of behavior in a video by analyzing video data. Since the video is composed of multiple frames of images in time series, compared with the two-dimensional data of the image, the video adds data in the time series dimension. Therefore, the video-based behavior recognition technology needs to analyze and process the three-dimensional data of the video.
- the embodiments of the present application provide a behavior recognition method, apparatus, terminal device, and computer-readable storage medium, which can reduce the data processing amount of video behavior recognition and improve the recognition accuracy.
- an embodiment of the present application provides a behavior recognition method, including:
- a final action recognition result of the video to be processed is determined according to the respective initial action recognition results of the plurality of video segments.
- converting the three-dimensional video data of the video to be processed into two-dimensional video data is equivalent to converting the three-dimensional data processing task of the video into a two-dimensional data processing task, which greatly reduces the amount of data processing;
- the video data contains time series features. Therefore, the above method can not only extract the image feature information of the video, but also can extract the time series feature information between the images in the video. It can effectively improve the accuracy of the recognition results.
- the acquiring the respective 3D video data of multiple video segments in the video to be processed includes:
- the 3D video data of the video clip is generated according to the pixels on each frame image included in the video clip, wherein the size of the 3D video data is H ⁇ W ⁇ T,
- the H is the number of pixels included in the width direction of each frame image in the video clip
- the W is the number of pixels included in the length direction of each frame image in the video clip
- the T is the The number of frames of the image contained in the video clip.
- the converting the three-dimensional video data of each of the video segments into two-dimensional video data includes:
- each two-dimensional data in the three-dimensional video data of the video clip is combined into a set of the two-dimensional video data, and three sets of the two-dimensional video data of the video clip are obtained.
- the determining the respective initial behavior recognition results of the multiple video segments according to the respective two-dimensional video data of the multiple video segments includes:
- the initial behavior recognition result of the video clip is determined according to the fusion feature information of the video clip.
- the fusion of the respective initial feature information of the three sets of the two-dimensional video data of the video clip into the fusion feature information of the video clip includes:
- the respective initial feature information of the three groups of the two-dimensional video data of the video clip is spliced into a feature splicing vector
- the initial behavior result of the video clip includes a behavior type to which the video clip belongs;
- the determining the final behavior recognition result of the video to be processed according to the respective initial behavior recognition results of the multiple video clips includes:
- the target type is determined as the final action recognition result of the video to be processed.
- an embodiment of the present application provides a behavior recognition device, including:
- a data acquisition unit for acquiring the respective 3D video data of multiple video clips in the video to be processed
- a data conversion unit for converting the three-dimensional video data of each of the video segments into two-dimensional video data
- a segment identification unit configured to determine the respective initial behavior identification results of the multiple video segments according to the respective two-dimensional video data of the multiple video segments;
- An identification result unit configured to determine a final action identification result of the video to be processed according to the respective initial action identification results of the plurality of video segments.
- an embodiment of the present application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes all
- the behavior recognition method according to any one of the above-mentioned first aspect is realized when the computer program is used.
- an embodiment of the present application provides a computer-readable storage medium, and an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, wherein the When the computer program is executed by the processor, the behavior recognition method according to any one of the above-mentioned first aspects is implemented.
- an embodiment of the present application provides a computer program product, which, when the computer program product runs on a terminal device, enables the terminal device to execute the behavior recognition method described in any one of the above-mentioned first aspects.
- FIG. 1 is a schematic flowchart of a behavior recognition method provided by an embodiment of the present application.
- FIG. 2 is a schematic diagram of a data processing flow of behavior recognition provided by an embodiment of the present application.
- FIG. 3 is a schematic diagram of a data conversion process provided by an embodiment of the present application.
- FIG. 4 is a structural block diagram of a behavior recognition device provided by an embodiment of the present application.
- FIG. 5 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
- references in this specification to "one embodiment” or “some embodiments” and the like mean that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application.
- appearances of the phrases “in one embodiment,” “in some embodiments,” “in other embodiments,” “in other embodiments,” etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean “one or more but not all embodiments” unless specifically emphasized otherwise.
- FIG. 1 it is a schematic flowchart of a behavior recognition method provided by an embodiment of the present application.
- the method may include the following steps:
- S101 Acquire three-dimensional video data of each of multiple video segments in the video to be processed.
- the pixels in an image constitute two-dimensional data.
- the size of the two-dimensional data is H ⁇ W, where H is the number of pixels included in the width direction of the image, and W is the number of pixels included in the length direction of the image.
- H is the number of pixels included in the width direction of the image
- W is the number of pixels included in the length direction of the image.
- an image contains 10 pixels in the length direction and 5 pixels in the width direction
- the size of the two-dimensional data of the image is 5 ⁇ 10, that is, the image contains 50 pixels
- These 50 pixels constitute 5 ⁇ 10 two-dimensional data
- this set of two-dimensional data contains the feature information of the image.
- Video is composed of multiple frames of images arranged in time series. Compared with images, video has more feature information in the time series dimension. That is, on the basis of the two-dimensional data of the image, one-dimensional time series data is added. Therefore, video can be described by three-dimensional data.
- three-dimensional video data of the video to be processed may be generated according to images of all frames in the video to be processed.
- the video to be processed may be sampled, and the pixels of the image obtained by sampling constitute three-dimensional video data of the video to be processed. For example, if there are 100 frames of images in the video to be processed, sampling is performed at intervals of 4 frames of images, 20 frames of images are extracted, and the pixels of these 20 frames of images constitute the three-dimensional video data of the video to be processed.
- sampling frequency is high, the number of images obtained is large, and the data processing volume is still large; if the sampling frequency is low, the obtained image data is less, and the data processing volume is small, but more image information will be lost.
- the method of acquiring the 3D video data of each video segment includes:
- each video clip includes multiple frames of images; for each video clip, generate three-dimensional video data of the video clip according to the pixels on each frame image contained in the video clip .
- the size of the 3D video data is H ⁇ W ⁇ T
- H is the number of pixels included in the width direction of each frame image in the video clip
- W is the number of pixels included in the length direction of each frame image in the video clip
- T is the number of frames of images contained in the video clip.
- the video frame extraction process can be to extract a frame of images every n frames of images, and then divide the extracted images into multiple image groups according to the time sequence, each image group is a video segment; it can also be extracted every n frames of images. M frames of images are determined as a video segment.
- the identification process provides a reliable data base.
- FIG. 2 it is a schematic diagram of a data processing flow of behavior recognition provided by an embodiment of the present application.
- the video to be processed is used as the input video, and the size of the video to be processed is 3 ⁇ H ⁇ W ⁇ L.
- L is the total number of frames of images contained in the video to be processed; 3 represents the three color channels of RGB, and the information of the three color channels can be reflected in the pixel value. Therefore, the size 3 can be ignored, that is, the size of the video to be processed is 3.
- Dimensions are H ⁇ W ⁇ L.
- Perform frame extraction and combination on the input video that is, video frame extraction processing, as shown in FIG. 2, taking T frames as a group) to obtain multiple video clips, and the size of each video clip is H ⁇ W ⁇ T.
- S102 Convert the three-dimensional video data of each video segment into two-dimensional video data.
- an implementation manner of converting three-dimensional video data into two-dimensional video data is: adding data in one dimension of the three-dimensional video data to the other two dimensions to form two-dimensional video data.
- FIG. 3 is a schematic diagram of a data conversion process provided by an embodiment of the present application.
- a video segment includes 4 frames of images I, II, III, and IV, and the 4 frames of images are combined according to time series. Now splicing the 4 images into a large spliced image V, the pixels on this large spliced image v constitute the two-dimensional video data of the video clip.
- an implementation manner of converting three-dimensional video data into two-dimensional video data is:
- each two-dimensional data in the three-dimensional video data of the video clip is combined into a set of two-dimensional video data to obtain three sets of two-dimensional video data of the video clip.
- the three-dimensional video data H ⁇ W ⁇ T is divided into three sets of two-dimensional video data of H ⁇ W, H ⁇ T and W ⁇ T.
- the 3D video data can be regarded as A large cuboid
- each pixel in each frame of image can be regarded as a voxel of a large cuboid (ie, a small cuboid)
- the cuboid marked as 1 in the figure represents the pixel in the first frame of the video clip
- marked A cube with a value of 2 represents a pixel in the second frame of the video clip
- a cube marked with 4 represents a pixel in the fourth frame of the video clip).
- the three-dimensional video data is split into a group of 2 ⁇ 3 two-dimensional video data, and the group includes the pixels on the cross-section of abcd in the cuboid.
- the 3D video data is split into a set of 2 ⁇ 4 2D video data, which includes pixels on the cross-section of the abef in the cuboid.
- the 3D video data is split into a set of 3 ⁇ 4 2D video data, which includes the pixels on the bcge cross-section in the cuboid.
- S103 Determine respective initial behavior recognition results of the multiple video segments according to the respective two-dimensional video data of the multiple video segments.
- three sets of two-dimensional video data of the video clip can be input into the recognition model after training, and the initial behavior recognition result of the video clip can be output.
- the input data of the recognition model are three sets of two-dimensional data, and there are many input data.
- the amount of data processing is relatively large.
- the implementation of S103 includes:
- For each video clip extract the respective initial feature information of the three groups of two-dimensional video data of the video clip; fuse the respective initial feature information of the three groups of two-dimensional video data of the video clip into the fusion feature information of the video clip; The feature information is fused to determine the initial behavior recognition result of the video clip.
- three groups of two-dimensional video data are respectively subjected to two-dimensional convolution processing to obtain initial feature information of each group of two-dimensional video data. For example, perform 3 ⁇ 3 ⁇ 1 convolution processing and 3 ⁇ 3 ⁇ 1 pooling processing on the two-dimensional data H ⁇ W to obtain 1 ⁇ 1 initial feature information. Since the T dimension of the two-dimensional data is 1, it is actually equivalent to performing 3 ⁇ 3 two-dimensional convolution processing and two-dimensional pooling processing on the two-dimensional data H ⁇ W.
- the process of fusing the respective initial feature information of the three groups of two-dimensional video data into the fusion feature information includes:
- the initial feature information of the three groups of two-dimensional video data of the video clip is spliced into a feature splicing vector; the average pooling process is performed on the feature splicing vector to obtain the pooled feature information; the pooled feature vector is converted according to the preset number of behavior categories. size to obtain fusion feature information.
- the initial feature information of each of the three groups of two-dimensional video data is a value of 1 ⁇ 1.
- C out 3, ie three color channels of RGB.
- average pooling is used to obtain pooled feature information of size C out ⁇ 1 ⁇ 1 ⁇ 1.
- the dimension of C out is changed to k (where k represents the preset number of behavior categories, that is, the number of categories of behaviors to be recognized), and the fusion feature information of size k ⁇ 1 ⁇ 1 is obtained.
- the probability value of the fusion feature information belonging to various behavior categories is calculated through the softmax layer, and the behavior category corresponding to the maximum probability value is determined as the initial recognition result of the video clip.
- S104 Determine a final behavior recognition result of the video to be processed according to the respective initial behavior recognition results of the multiple video segments.
- the initial behavior result of the video clip includes the behavior type to which the video clip belongs.
- voting may be used to determine the final behavior recognition result of the video to be processed according to the initial behavior recognition result.
- the video to be processed includes 3 video clips, the behavior category to which the first video clip belongs is A, the behavior category to which the second video clip belongs is B, and the behavior category to which the third video clip belongs is A.
- the number of video clips belonging to behavior category A is 2, and the number of video clips belonging to behavior category B is 1. Therefore, the target type is A, that is, the final behavior result of the video to be processed is A.
- converting the three-dimensional video data of the video to be processed into two-dimensional video data is equivalent to converting the three-dimensional data processing task of the video into a two-dimensional data processing task, which greatly reduces the amount of data processing;
- the video data contains time series features. Therefore, the above method can not only extract the image feature information of the video, but also can extract the time series feature information between the images in the video. It can effectively improve the accuracy of the recognition results.
- FIG. 4 is a structural block diagram of the behavior recognition apparatus provided by the embodiment of the present application. For convenience of description, only the part related to the embodiment of the present application is shown.
- the device includes:
- the data acquisition unit 41 is configured to acquire the respective three-dimensional video data of multiple video segments in the video to be processed.
- the data conversion unit 42 is configured to convert the three-dimensional video data of each of the video segments into two-dimensional video data.
- the segment identification unit 43 is configured to determine the respective initial behavior identification results of the multiple video segments according to the respective two-dimensional video data of the multiple video segments.
- the identification result unit 44 is configured to determine the final action identification result of the video to be processed according to the respective initial action identification results of the plurality of video segments.
- the data acquisition unit 41 is also used for:
- the video clips include multiple frames of images; for each of the video clips, according to each frame included in the video clip
- the pixels on the image generate the three-dimensional video data of the video clip, wherein the size of the three-dimensional video data is H ⁇ W ⁇ T, and the H is the width of each frame of the video clip included in the width direction.
- the data conversion unit 42 is also used for:
- each two-dimensional data in the three-dimensional video data of the video clip is combined into a set of the two-dimensional video data, and three sets of the two-dimensional video data of the video clip are obtained.
- segment identification unit 43 is also used for:
- each of the video clips For each of the video clips, extract the respective initial feature information of the three sets of the two-dimensional video data of the video clip; fuse the respective initial feature information of the three sets of the two-dimensional video data of the video clip is the fusion feature information of the video clip; the initial behavior recognition result of the video clip is determined according to the fusion feature information of the video clip.
- segment identification unit 43 is also used for:
- the initial behavior result of the video clip includes a behavior type to which the video clip belongs.
- the identification result unit 44 is also used for:
- the behavior recognition device shown in FIG. 4 may be a software unit, a hardware unit, or a unit combining software and hardware built into the existing terminal equipment, or it may be integrated into the terminal equipment as an independent pendant, or it may be Exist as an independent terminal device.
- FIG. 5 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
- the terminal device 5 in this embodiment includes: at least one processor 50 (only one is shown in FIG. 5 ), a processor 51 , and a processor 51 stored in the memory 51 and capable of processing in the at least one processor
- a computer program 52 running on the processor 50 when the processor 50 executes the computer program 52, the steps in any of the above-mentioned embodiments of the behavior recognition method are implemented.
- the terminal device may be a computing device such as a desktop computer, a notebook, a palmtop computer, and a cloud server.
- the terminal device may include, but is not limited to, a processor and a memory.
- FIG. 5 is only an example of the terminal device 5, and does not constitute a limitation on the terminal device 5. It may include more or less components than the one shown, or combine some components, or different components , for example, may also include input and output devices, network access devices, and the like.
- the so-called processor 50 may be a central processing unit (Central Processing Unit, CPU), and the processor 50 may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuits) , ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
- a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
- the memory 51 may be an internal storage unit of the terminal device 5 in some embodiments, such as a hard disk or a memory of the terminal device 5 .
- the memory 51 may also be an external storage device of the terminal device 5 in other embodiments, such as a plug-in hard disk equipped on the terminal device 5, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, flash memory card (Flash Card), etc.
- the memory 51 may also include both an internal storage unit of the terminal device 5 and an external storage device.
- the memory 51 is used to store an operating system, an application program, a boot loader (Boot Loader), data, and other programs, such as program codes of the computer program, and the like.
- the memory 51 can also be used to temporarily store data that has been output or will be output.
- Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the foregoing method embodiments can be implemented.
- the embodiments of the present application provide a computer program product, when the computer program product runs on a terminal device, so that the terminal device can implement the steps in the foregoing method embodiments when executed.
- the integrated unit if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium.
- the present application realizes all or part of the processes in the methods of the above embodiments, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium.
- the computer program includes computer program code
- the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like.
- the computer-readable medium may include at least: any entity or device capable of carrying the computer program code to the device/terminal device, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media.
- ROM read-only memory
- RAM Random Access Memory
- electrical carrier signals telecommunication signals
- software distribution media For example, U disk, mobile hard disk, magnetic disk or CD, etc.
- computer-readable media may not be electrical carrier signals and telecommunications signals.
- the disclosed apparatus/terminal device and method may be implemented in other manners.
- the apparatus/terminal device embodiments described above are only illustrative.
- the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units. Or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented.
- the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
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Claims (10)
- 一种行为识别方法,其特征在于,所述方法包括:获取待处理视频中的多个视频片段各自的三维视频数据;将每个所述视频片段的所述三维视频数据转换为二维视频数据;根据所述多个视频片段各自的所述二维视频数据确定所述多个视频片段各自的初始行为识别结果;根据所述多个视频片段各自的所述初始行为识别结果确定所述待处理视频的最终行为识别结果。
- 如权利要求1所述的行为识别方法,其特征在于,所述获取待处理视频中的多个视频片段各自的三维视频数据,包括:对所述待处理视频进行视频抽帧处理,获得所述多个视频片段,其中,所述视频片段中包括多帧图像;对于每个所述视频片段,根据所述视频片段中包含的各帧图像上的像素生成所述视频片段的所述三维视频数据,其中,所述三维视频数据的尺寸为H×W×T,所述H为所述视频片段中各帧图像在宽度方向上包含的像素个数,所述W为所述视频片段中各帧图像在长度方向上包含的像素个数,所述T为所述视频片段中包含的图像的帧数。
- 如权利要求1所述的行为识别方法,其特征在于,所述将每个所述视频片段的所述三维视频数据转换为二维视频数据,包括:对于每个所述视频片段,将所述视频片段的所述三维视频数据中的每两维数据组合成一组所述二维视频数据,获得所述视频片段的三组所述二维视频数据。
- 如权利要求3所述的行为识别方法,其特征在于,所述根据所述多个视频片段各自的所述二维视频数据确定所述多个视频片段各自的初始行为识别结果,包括:对于每个所述视频片段,提取所述视频片段的三组所述二维视频数据各自的初始特征信息;将所述视频片段的三组所述二维视频数据各自的所述初始特征信息融合为所述视频片段的融合特征信息;根据所述视频片段的所述融合特征信息确定所述视频片段的初始行为识别结果。
- 如权利要求4所述的行为识别方法,其特征在于,所述将所述视频片段的三组所述二维视频数据各自的所述初始特征信息融合为所述视频片段的融合特征信息,包括:将所述视频片段的三组所述二维视频数据各自的所述初始特征信息拼接为特征拼接向量;对所述特征拼接向量进行平均池化处理,得到池化特征信息;根据预设的行为类别数量转换所述池化特征向量的尺寸,获得所述融合特征信息。
- 如权利要求1所述的行为识别方法,其特征在于,所述视频片段的所述初始行为结果包括所述视频片段所属的行为类型;所述根据所述多个视频片段各自的所述初始行为识别结果确定所述待处理视频的最终行为识别结果,包括:根据所述多个视频片段各自的所述初始行为结果统计属于每种所述行为类型的所述视频片段的片段个数;根据所述行为类型对应的所述片段个数,确定所述多个视频片段各自对应的所述行为类型中的目标类型;将所述目标类型确定为所述待处理视频的所述最终行为识别结果。
- 一种行为识别装置,其特征在于,所述装置包括:数据获取单元,用于获取待处理视频中的多个视频片段各自的三维视频数据;数据转换单元,用于将每个所述视频片段的所述三维视频数据转换为二维视频数据;片段识别单元,用于根据所述多个视频片段各自的所述二维视频数据确定所述多个视频片段各自的初始行为识别结果;识别结果单元,用于根据所述多个视频片段各自的所述初始行为识别结果确定所述待处理视频的最终行为识别结果。
- 如权利要求7所述的行为识别装置,其特征在于,所述数据获取单元还用于:对所述待处理视频进行视频抽帧处理,获得所述多个视频片段,其中,所述视频片段中包括多帧图像;对于每个所述视频片段,根据所述视频片段中包含的各帧图像上的像素生成所述视频片段的所述三维视频数据,其中,所述三维视频数据的尺寸为H×W×T,所述H为所述视频片段中各帧图像在宽度方向上包含的像素个数,所述W为所述视频片段中各帧图像在长度方向上包含的像素个数,所述T为所述视频片段中包含的图像的帧数。
- 一种终端设备,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,其特征在于,所述处理器执行所述计算机程序时实现如权利要求1至6任一项所述的方法。
- 一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,其特征在于,所述计算机程序被处理器执行时实现如权利要求1至6任一项所述的方法。
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| CN113505733B (zh) * | 2021-07-26 | 2025-04-04 | 浙江大华技术股份有限公司 | 行为识别方法、装置、存储介质及电子装置 |
| CN113807222B (zh) * | 2021-09-07 | 2023-06-27 | 中山大学 | 基于稀疏采样进行端到端训练的视频问答方法与系统 |
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