WO2021043295A1 - 一种全景视频的目标追踪方法、装置及便携式终端 - Google Patents
一种全景视频的目标追踪方法、装置及便携式终端 Download PDFInfo
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- WO2021043295A1 WO2021043295A1 PCT/CN2020/113643 CN2020113643W WO2021043295A1 WO 2021043295 A1 WO2021043295 A1 WO 2021043295A1 CN 2020113643 W CN2020113643 W CN 2020113643W WO 2021043295 A1 WO2021043295 A1 WO 2021043295A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/41—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items
- G06V20/42—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items of sport video content
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V2201/00—Indexing scheme relating to image or video recognition or understanding
- G06V2201/07—Target detection
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- the present invention belongs to the field of video, and in particular relates to a method, device and portable terminal for tracking a target in panoramic video.
- Target tracking is an important research direction in computer vision, which has been widely used in the fields of video surveillance and human-computer interaction; target tracking is to generate the motion trajectory of the target by locating the target in each frame of the video. A method for continuous inference of the target state in the.
- Panoramic video converts static panoramic pictures into dynamic panoramic video images. Users can freely watch dynamic videos within the shooting angle of the panoramic camera; when watching panoramic videos, the flat-panel display can only display one of the panoramic videos at a certain moment.
- a viewing angle when the user wants to continuously watch a specific target object, it may be necessary to continuously control the rotation angle of the display because the target disappears in the current viewing angle, so the operation is more troublesome.
- the position of an object that the audience is interested in is constantly changing in the panoramic video, the audience needs to adjust the viewing angle continuously following the rotation of the object. In this case, the audience will feel dizzy; when the audience is concerned about multiple targets in the same panoramic video When you are interested, you need to watch the panoramic video multiple times to find different targets. Therefore, viewing the panoramic video is troublesome and inefficient in this case.
- the present invention proposes a target tracking method, device and portable terminal for panoramic video, aiming to detect and track objects in panoramic video, realize the acquisition of the video segment corresponding to each tracked object, and enable the target object to always be in The effect of the center of the panoramic video or the center of the flat video.
- the present invention provides a target tracking method for panoramic video, the method includes:
- the present invention provides a panoramic video target tracking device, which includes:
- the acquisition module is used to acquire the panoramic video frame of the panoramic video
- the edge expansion module is used to expand the panoramic video to one side to obtain the expanded edge video frame
- the target detection module is used to perform target detection on the current extended edge video frame and select the target tracking category;
- Target tracking module used for target detection and tracking for each subsequent extended edge video frame
- Get the video segment module used to obtain the video segments corresponding to all tracking targets.
- the present invention provides a computer-readable storage medium, which, when the computer program is executed by a processor, implements the steps of the above-mentioned panoramic video target tracking method.
- the present invention provides a portable terminal, including:
- One or more processors are One or more processors;
- One or more computer programs wherein the one or more computer programs are stored in the memory and configured to be executed by the one or more processors, and the processor implements The steps of a target tracking method for panoramic video are as described above.
- the present invention performs target detection and tracking on the expanded edge video frame to obtain the video segment corresponding to each tracked object, and the tracked target object can always be in the middle of the panoramic video or With the effect of the center of the flat video, the present invention can also quickly select the object of interest, and realize the effect of browsing the corresponding video picture.
- FIG. 1 is a flowchart of a method for tracking a target in a panoramic video according to Embodiment 1 of the present invention.
- Fig. 2 is a schematic diagram of a target tracking module for panoramic video according to the second embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of a portable terminal provided in Embodiment 3 of the present invention.
- a method for tracking a target in panoramic video provided by Embodiment 1 of the present invention includes the following steps:
- the panoramic video is a panoramic flat video.
- the panoramic video is a panoramic spherical video
- the panoramic spherical video should first be projected onto the panoramic flat video;
- the one side is the left or right side of the video frame
- the said panoramic video frame is expanded to one side, one of the embodiments is: when the left side of the panoramic video frame is expanded, the 1/n part of the video frame to the right is copied and pasted in parallel to On the left, splicing to generate extended edge video frames, where n is not equal to 0, n>0;
- the said panoramic video frame is expanded to one side
- another embodiment is: when the right side of the panoramic video frame is expanded, the 1/n part of the video frame to the left is copied and pasted in parallel To the right, splicing to generate extended edge video frames, where n is not equal to 0, n>0;
- the extended edge video frame makes the panoramic video frame image after the panoramic video expansion has image redundancy, so as to solve the problem that the boundary of the panoramic video frame image expanded by the projection method has the target object divided into two halves, resulting in the object detection method that cannot be detected problem.
- the preset target detection threshold is k. According to this threshold, the target category of the current extended video frame target tracking is selected as one, where i is greater than 1. Integer, which is an integer greater than 0;
- the tracked target objects include but are not limited to objects such as people, animals, and vehicles;
- the target detection method may be a pre-trained target detection method, and the pre-trained target detection method specifically includes: pre-defining the target detection category, making a category data set, and then training a target detection algorithm based on a neural network;
- the target detection method may also be a face detection method, a deep learning target detection algorithm based on Region Proposal, a biometric recognition method, etc., which are not specifically limited in this application.
- the target detection and tracking for each subsequent extended edge video frame specifically includes:
- the target tracking algorithm is specifically:
- the tracking target selected from the i-th frame image is used as all the tracking targets in the i-th frame image;
- the tracking target selected from the i-th frame panoramic image and the tracking target obtained from the i-th frame tracking are used as all the tracking targets in the i-th frame image;
- the target tracking method may be an iou-track tracking algorithm or a sort tracking algorithm
- the target tracking method may also be an active contour-based tracking method, a feature-based tracking method, an area-based tracking method, a model-based tracking method, etc.;
- the target category may be detected by a target detection method, may be tracked by a target tracking method, or may be obtained by using the above two methods;
- One embodiment of the target tracking algorithm is to use the iou-track tracking algorithm; set a threshold ⁇ l for target detection, filter the results whose target detection score is less than the threshold, and leave the detection frame with a score higher than the threshold; for each Frame, find the detection frame with the largest iou in the tracking frame of the current tracking queue in the detection frame of the current frame, and then determine whether the iou is greater than the threshold, if so, add the detection frame as the matching tracking frame in The position in the current frame; otherwise, determine whether the maximum detection score of the tracking frame in the previous frame is greater than the threshold ⁇ h, and whether the number of frames that the target appears before the frame is greater than the threshold tmin; if it is, it means that it is a normal tracking object , And has left the screen in the current frame, so the tracking object is removed from the tracking queue; for the detection frame that does not match, it is considered a new object, and the detection frame is added to the tracking queue as the object to be tracked.
- All the tracking targets are the number of targets that appear in the tracking queue from the first frame of the video detection to the end of the detection, set to X, where X is an integer not less than 1;
- the returning the video segments corresponding to all the tracking targets is specifically: obtaining the video frames of each tracking target successfully tracking respectively, and editing the corresponding video frames into corresponding video segments.
- step S105 the video segment can be displayed on the plane at all times with the target as the center;
- the video segment is always displayed on the plane centered on the target.
- the method in the Chinese patent "A target tracking method, device and panoramic camera for panoramic video, application number: 2018105415536" is used to make the video always display on the plane centered on the target. Recommend to users;
- the video segment recommended to the user is displayed in all tracking target categories for the user to choose.
- the effect of browsing the video segment corresponding to the object can be achieved.
- the present invention by expanding the edge of the panoramic video frame, target detection and tracking are performed on the expanded edge video frame, and the video segment corresponding to each tracked object is obtained, so that the target object can always be in the middle or plane of the panoramic video.
- the effect of the center of the video; the present invention can also quickly select objects of interest to achieve the effect of browsing the corresponding video pictures.
- a panoramic video target tracking device provided by Embodiment 2 of the present invention includes:
- the acquisition module is used to acquire the panoramic video frame of the panoramic video
- the edge expansion module is used to expand the panoramic video to one side to obtain the expanded edge video frame
- the target detection module is used to perform target detection on the current extended edge video frame and select the target tracking category;
- Target tracking module used for target detection and tracking for each subsequent extended edge video frame
- Get the video segment module used to obtain the video segments corresponding to all tracking targets.
- the device for tracking a target in panoramic video provided in the second embodiment of the present invention and the method for tracking a target in panoramic video provided in the first embodiment of the present invention belong to the same concept.
- the specific implementation process is detailed in the full text of the specification, and will not be repeated here. .
- the second embodiment of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements a panoramic video view as provided in the first embodiment of the present invention.
- the computer-readable storage medium may be a non-transitory computer-readable storage medium.
- FIG. 3 shows a specific structural block diagram of a portable terminal provided in the third embodiment of the present invention.
- a portable terminal 100 includes: one or more processors 101, a memory 102, and one or more computer programs, wherein the processing The device 101 and the memory 102 are connected by a bus, and the one or more computer programs are stored in the memory 102 and are configured to be executed by the one or more processors 101, and the processor 101 executes The computer program implements the steps of a panoramic video target tracking method provided in the first embodiment of the present invention.
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Abstract
Description
Claims (11)
- 一种全景视频的目标追踪方法,其特征在于,包括以下步骤:获取全景视频的全景视频帧;将全景视频帧向一边作扩边处理,得到扩边视频帧;对当前扩边视频帧进行目标检测,选取目标跟踪的类别;对后续每个扩边视频帧进行目标检测与跟踪;获取所有跟踪目标对应的视频段。
- 如权利要求1所述的方法,其特征在于:所述获取所有跟踪目标对应的视频段之后还包括步骤:使所述视频段始终以目标为中心进行平面显示。
- 如权利要求1所述的方法,其特征在于:所述将全景视频向一边作扩边处理,得到扩边视频帧具体为:所述全景视频帧的总数为S个,S为大于1的整数;将全景视频帧的左边或右边的内容向右边或左边做扩边处理。
- 如权利要求3所述的方法,其特征在于,所述将全景视频帧的左边或右边的内容向右边或左边做扩边处理,具体为:当对所述全景视频帧的左边进行扩边处理时,将视频画面靠右边的1/n的部分平行复制粘贴到左边,拼接生成扩边视频帧,其中n不等于0,n>0;当对所述全景视频帧的右边进行扩边处理时,将视频画面靠左边的1/n的部分平行复制粘贴到右边,拼接生成扩边视频帧,其中n不等于0,n>0。
- 如权利要求1所述的方法,其特征在于:所述对当前扩边视频帧进行目标检测,选取目标跟踪的类别具体为:以当前扩边视频帧为第i帧;对第i帧进行目标检测,预设目标检测的阈值为k,选取当前扩展视频帧目标跟踪的目标类别为m i个,其中i为大于1的整数,m为大于0的整数。
- 如权利要求1所述的方法,其特征在于:所述的对后续每个扩边视频帧进行目标检测与跟踪具体包括:依次对第i+j帧用进行目标检测,选取目标跟踪的类别m i+j个;采用目标跟踪算法进行跟踪,若该目标连续a帧出现,则将该目标加入追踪队列;若该目标连续b帧没有检测到,则结束该目标的跟踪,a和b分别为大于1的整数;所述目标跟踪算法具体为:若i=1,则根据从第i帧图像中选取的跟踪目标作为第i帧图像中的所有跟踪目标;若1<i<S,则根据从第i帧全景图像中中选取的跟踪目标和从第i帧跟踪得到的跟踪目标,作为第i帧图像中所有跟踪目标;若i=S,则将从第i帧中跟踪得到的所有跟踪目标作为第i帧图像中的所有跟踪目标。
- 如权利要求1所述的方法,其特征在于:所述获取所有跟踪目标对应的视频段具体为;从全景视频帧开始检测的第一帧到最后一帧,总计检测X个目标类别,X为不小于1的整数;对全景视频帧采用上述方法检测追踪,获取每个追踪目标追踪成功的视频段。
- 一种全景视频的目标追踪的装置,其特征在于,包括:获取模块,用于获取全景视频的全景视频帧;扩边模块,用于将全景视频向一边作扩边处理,得到扩边视频帧;目标检测模块,用于对当前扩边视频帧进行目标检测,选取目标跟踪的类别;目标跟踪模块,用于对后续每个扩边视频帧进行目标检测与跟踪;获取视频段模块,用于获取所有跟踪目标对应的视频段。
- 一种全景视频的目标追踪的装置,其特征在于所述获取所有跟踪目标对应的视频段之后还包括步骤:使所述视频段始终以目标为中心进行平面显示。
- 一种计算机可读存储介质,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7任一项所述的一种全景视频的目标追踪方法的步骤。
- 一种便携式终端,包括:一个或多个处理器;存储器;以及一个或多个计算机程序,其中所述一个或多个计算机程序被存储在所述存储器中,并且被配置成由所述一个或多个处理器执行,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7任一项所述的一种全景视频的目标追踪方法的步骤。
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