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WO2016015544A1 - Procédé et dispositif pour prise de vue de suivi d'un objet mobile - Google Patents

Procédé et dispositif pour prise de vue de suivi d'un objet mobile Download PDF

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Publication number
WO2016015544A1
WO2016015544A1 PCT/CN2015/083196 CN2015083196W WO2016015544A1 WO 2016015544 A1 WO2016015544 A1 WO 2016015544A1 CN 2015083196 W CN2015083196 W CN 2015083196W WO 2016015544 A1 WO2016015544 A1 WO 2016015544A1
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WIPO (PCT)
Prior art keywords
trajectory
image
moving object
video
track
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Ceased
Application number
PCT/CN2015/083196
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English (en)
Chinese (zh)
Inventor
邹明双
里强
苗雷
崔小辉
魏宇星
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Nubia Technology Co Ltd
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Nubia Technology Co Ltd
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Publication date
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Publication of WO2016015544A1 publication Critical patent/WO2016015544A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

Definitions

  • This paper relates to the field of camera technology, and in particular to a method and a device for shooting a trajectory of a moving object.
  • the shooting of the object's trajectory is gradually loved by people, such as the shooting of the star track, but the movement of the stars is generally not obvious, it takes hours or even longer to shoot, that is, the shooting of the star track is It can't be completed in a short time, which will cause the user to take too long, and due to long-time shooting, it may be affected by many objective factors, such as weather or light interference, resulting in unsatisfactory shooting results.
  • Embodiments of the present invention provide a method and apparatus for shooting a moving object trajectory to solve the technical problem of how to shorten the shooting time of a trajectory of a moving object.
  • an embodiment of the present invention provides a method for photographing a trajectory of a moving object, wherein the method for photographing the trajectory of the moving object includes the following steps:
  • the image of the moving object is collected by the camera;
  • the step of performing a complement processing on the motion trajectory of the moving object based on the image, and obtaining the first trajectory image or the first trajectory video of the moving object includes:
  • the first trajectory image or the first trajectory video is obtained.
  • the step of calculating the trajectory data of the future motion of the moving object according to the second trajectory image or the second trajectory video comprises:
  • the star track data of the future motion is acquired based on the circular trajectory.
  • the step of generating the second trajectory image of the moving object according to the image includes:
  • the current image and the previous composite image are sequentially subjected to luminance synthesis processing, and the last synthesized image is used as the second trajectory image.
  • the step of generating the second trajectory video of the moving object according to the image includes:
  • the second trajectory video is generated by the video encoded processed composite image.
  • the trajectory of the moving object is a star track.
  • an embodiment of the present invention further provides a photographing apparatus for a trajectory of a moving object, and the photographing apparatus of the trajectory of the moving object includes:
  • the acquisition module is configured to collect an image of the moving object through the camera after the shooting starts;
  • the completion module is configured to perform a complement processing on the motion trajectory of the moving object based on the image to obtain a first trajectory image or a first trajectory video of the moving object.
  • the completion module includes:
  • a generating unit configured to generate a second trajectory image or a second trajectory video of the moving object according to the acquired image of the moving object
  • a calculating unit configured to calculate trajectory data of a future motion of the moving object according to the second trajectory image or the second trajectory video
  • a supplementing unit configured to add the trajectory data of the future motion of the moving object to the second trajectory image or the second trajectory video to obtain the first trajectory image or the first trajectory video.
  • the calculating unit includes:
  • Calculating a sub-unit configured to acquire a circular arc-shaped trajectory in the second trajectory image or the second trajectory video, and calculate a circular trajectory according to the circular arc-shaped trajectory;
  • the generating unit is configured to generate a second trajectory image of the moving object according to the image by:
  • the current image and the previous composite image are sequentially subjected to luminance synthesis processing, and the last synthesized image is used as the second trajectory image.
  • the generating unit includes:
  • a synthesis subunit configured to sequentially perform brightness synthesis processing on the current image and the previous composite image to obtain all the composite images
  • a coding subunit configured to perform video coding processing on all of the composite images
  • Generating a subunit configured to generate the second trajectory video from the video encoded processed composite image.
  • the trajectory of the moving object is a star track.
  • an embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the foregoing method.
  • the method and device for shooting a trajectory of a moving object provided by the embodiment of the present invention, the image of a moving object such as a star is captured by the camera in a short time, and the captured image is synthesized to obtain a star-track image with a small motion amplitude or
  • the star-track video calculated by synthesizing the star-track image or the star-track video, can obtain the future trajectory, and further complement the calculated trajectory into the synthesized star-track image or the star-track video, which can clearly reflect the star.
  • the star-track image of the track or the star-track video, the embodiment of the invention can shorten the time of shooting the trajectory of the moving object, realize fast shooting, and improve the user experience.
  • FIG. 1 is a flow chart showing an embodiment of a method for photographing a trajectory of a moving object according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a refinement process of step S102 in FIG. 1;
  • step S1021 in FIG. 2 is a schematic diagram showing the refinement process of step S1021 in FIG. 2;
  • FIG. 4 is a schematic diagram of functional modules of an embodiment of an apparatus for photographing a trajectory of a moving object according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a refinement function module of the completion module in FIG. 4;
  • FIG. 6 is a schematic diagram of a refinement function module of the generating unit module in FIG. 5.
  • An embodiment of the present invention provides a method for photographing a trajectory of a moving object.
  • a method for photographing a trajectory of the moving object includes:
  • Step S101 after the start of shooting, the photographing device of the trajectory of the moving object collects an image of the moving object through the camera;
  • the moving object is, for example, a star or a moon, and the like, and may be other moving objects having a regular motion and a slow motion. All moving objects in the embodiment of the present invention are exemplified by stars.
  • a star track shooting mode can be added to the photographing device, and the user can select the star track shooting mode or the normal shooting mode to perform shooting, and during the shooting process, the camera cannot move, that is, shooting at the same position.
  • the star track shooting mode combined with the requirements of the star track shooting scene, preset the exposure time, ISO, resolution, exposure compensation, noise reduction and other parameters, and can also preset different parameters according to different starry sky scenes over different regions. For the user to choose when shooting.
  • the camera of the camera starts to shoot the star track, and the camera captures an image every preset time, which is equivalent to the preset time. Exposure time, optional 5 ⁇ 10S.
  • the captured image may be buffered so that the image is read from the cache for synthesis in a subsequent step, or the acquired image may be directly sent to a subsequent step for image synthesis.
  • the shooting of the star track takes a long time to get the trajectory image that can clearly reflect the star track. Or track video.
  • the camera of the photographing apparatus in this embodiment captures a part of the image in a short time, such as only taking one minute or three minutes to realize fast shooting.
  • Step S102 the photographing device of the trajectory of the moving object performs complement processing on the motion trajectory of the moving object based on the image to obtain a first trajectory image or a first trajectory video of the moving object.
  • the image of the camera portion of the camera is synthesized, and a star track image or a star track video with a small curvature can be obtained.
  • the star-track image or the star-track video is shot in a short period of time, and the motion is small. Therefore, the human eye cannot see the star track, that is, the effect of the star track cannot be reflected.
  • the synthesized star track image or the star track video can be analyzed.
  • the star track is circular, so that the star track image obtained by the synthesis or the track of the star track video can be calculated. The trajectory of future sports.
  • the synthesized star-track image or the star-track video is further complemented, and a star-track image or a star-track video capable of clearly reflecting the star-track can be obtained.
  • the embodiment is not limited to the shooting of the star track, and may also be the shooting of other moving objects, such as the trajectory shooting of the moon.
  • the present embodiment captures an image of a moving object such as a star in a short time by a camera, and synthesizes the captured image to obtain a star-track image or a star-track video with a small motion amplitude, and a star obtained by the synthesis.
  • the track image or the star track video is calculated to obtain the future trajectory, and the calculated trajectory is further complemented into the synthesized star track image or the star track video to obtain a star track image or a star track video capable of clearly reflecting the star track.
  • the time for photographing the trajectory of the moving object can be shortened, the fast shooting can be realized, and the user experience can be improved.
  • the foregoing step S102 includes:
  • Step S1021 Generate a second trajectory image or a second trajectory video of the moving object according to the acquired image of the moving object;
  • Step S1022 Calculate trajectory data of the future motion of the moving object according to the second trajectory image or the second trajectory video;
  • step S1023 the trajectory data of the future motion of the moving object is added to the second trajectory image or the second trajectory video to obtain the first trajectory image or the first trajectory video.
  • the photographing device directly receives the collected image, or reads the image from the cache for image synthesis, resets the cache, and empties the data therein to provide space for subsequent data.
  • the imaging device performs image synthesis according to the current image and the brightness information of the past image, including: performing brightness synthesis processing on the current image and the previous composite image in sequence: at the same position of the image, the pixel with the current image is brighter Replaces the darker pixels in the last composite image. Since the camera continuously captures images, the composite image is also continuously generated. The composite image is actually a star-track image, and the composite image at different times shows the star-track effect at different times.
  • the first captured image is the first image
  • the next captured image is the second image
  • comparing the pixels of the first image with the pixels of the second image if the brightness of the second image is greater than the brightness of the first image, extracting the pixels of the second image to replace the pixels corresponding to the position of the first image, replacing The latter first image is used as the previous composite image described above.
  • the third image is taken, the third image is used as the current image, and at the same position, the pixel at the position where the third image is brighter is replaced with the previous composite image, and so on, and the last image obtained is used as the present embodiment.
  • the second trajectory image of the example is used as the current image
  • the pixel at the position where the third image is brighter is replaced with the previous composite image, and so on
  • the last image obtained is used as the present embodiment.
  • the second trajectory video needs to perform video encoding processing and the like on the composite image.
  • a trajectory with a small motion amplitude can be acquired.
  • the trajectory of the segment is an arc
  • the camera calculates the arc of the segment by calculating the arc of the segment, and the circle is a complete star track.
  • two different chords on the arc can be arbitrarily taken, and the intersection of the perpendicular lines of the two chords is the center of the circle where the arc is located, and the circle can be determined by the center of the circle.
  • Shape that is, determine the star track.
  • This embodiment removes the remaining portion of the circular arc, which is the trajectory of the future movement of the star.
  • the first trajectory image or the first trajectory video may be obtained according to the setting of the user, that is, the length of the trajectory in the first trajectory image or the first trajectory video is set by the user as the trajectory data, which may be the entire circle, or may be It is an arc that can be clearly seen by the human eye.
  • the trajectory data is added to the second trajectory image or the second trajectory video, processed by other brightness or the like to obtain a first trajectory image or a first trajectory video.
  • the step of generating a second trajectory video of the moving object according to the image in the above step S1021 include:
  • Step S10211 sequentially performing brightness synthesis processing on the current image and the previous composite image to obtain all the composite images
  • Step S10212 performing video encoding processing on all of the composite images
  • Step S10213 Generate the second track video by using the video encoded processed composite image.
  • the process of performing the brightness synthesis process on the current image and the previous composite image is the same as that in the previous embodiment.
  • the difference is that the first image and all other composite images, that is, the first The image and all composite images are used as the material for the star track video.
  • the composite image or the intermittent captured composite image can be continuously captured.
  • Continuously capturing a composite image means that each time a composite image is synthesized, one is captured for video encoding processing, that is, all synthesized images are used as the material of the star track video.
  • the composite image and the captured composite image are subjected to video encoding processing in synchronization with two threads. Since the composite image is subjected to video encoding processing while shooting, it is not necessary to store the synthesized composite image.
  • Interval grabbing refers to the selective capture of a portion of a composite image as a material for a star-track video.
  • the interval mode can be a manual interval mode or an automatic interval mode.
  • the manual interval mode refers to providing an operation interface for the user to click to trigger the captured image data, such as clicking the screen to capture the currently synthesized composite image (when there is a preview, that is, the current preview image);
  • the automatic interval mode refers to The composite image is captured at a preset time interval, that is, a composite image is captured every preset time.
  • the interval for capturing the composite image may be longer than the interval at which the camera captures the image (ie, the exposure time), avoiding capturing the same composite image two or more times, or reducing the size of the final synthesized video file.
  • a composite image can be captured every 1 to 2 Min, which is the current composite image and the current track image. Then, the captured composite image is subjected to video encoding processing, and processed into common video encoding such as MPEG-4, H264, H263, VP8, etc., in preparation for subsequent generation of video files, and method and related technology for video encoding processing of composite images. The same, no longer repeat here.
  • An embodiment of the present invention further provides a photographing device for a trajectory of a moving object.
  • the photographing device for the trajectory of the moving object includes:
  • the collecting module 101 is configured to collect an image of the moving object through the camera after the shooting starts;
  • the moving object is, for example, a star or a moon, and the like, and may also have other motions.
  • the moving objects in the embodiments of the present invention all take stars as an example.
  • a star track shooting mode can be added to the photographing device, and the user can select the star track shooting mode or the normal shooting mode to shoot, and during the shooting process, the camera cannot move, that is, shooting in the same position.
  • the star track shooting mode combined with the requirements of the star track shooting scene, preset the exposure time, ISO, resolution, exposure compensation, noise reduction and other parameters, and can also preset different parameters according to different starry sky scenes over different regions. For the user to choose when shooting.
  • the camera of the camera starts to shoot the star track, and the camera captures an image every preset time, which is equivalent to the preset time. Exposure time, optional 5 ⁇ 10S.
  • the captured image may be buffered so that the image is read from the cache for synthesis in a subsequent step, or the acquired image may be directly sent to a subsequent step for image synthesis.
  • the shooting of the star track takes a long time to get a track image or track video that can clearly reflect the star track.
  • the camera of the photographing apparatus in this embodiment captures a part of the image in a short time, such as only taking one minute or three minutes to realize fast shooting.
  • the completion module 102 is configured to perform a complement processing on the motion trajectory of the moving object based on the image to obtain a first trajectory image or a first trajectory video of the moving object.
  • the image of the camera portion of the camera is synthesized, and a star track image or a star track video with a small curvature can be obtained.
  • the star-track image or the star-track video is shot in a short period of time, and the motion is small. Therefore, the human eye cannot see the star track, that is, the effect of the star track cannot be reflected.
  • the synthesized star track image or the star track video can be analyzed.
  • the star track is circular, so that the star track image obtained by the synthesis or the track of the star track video can be calculated. The trajectory of future sports.
  • the synthesized star-track image or the star-track video is further complemented, and a star-track image or a star-track video capable of clearly reflecting the star-track can be obtained.
  • the embodiment is not limited to the shooting of the star track, and may also be the shooting of other moving objects, such as the trajectory shooting of the moon.
  • the completion module 102 includes:
  • the generating unit 1021 is configured to generate a second trajectory image or a second trajectory video of the moving object according to the acquired image of the moving object;
  • the calculating unit 1022 is configured to calculate trajectory data of the future motion of the moving object according to the second trajectory image or the second trajectory video;
  • the supplementing unit 1023 is configured to add the trajectory data of the future motion of the moving object to the second trajectory image or the second trajectory video to obtain the first trajectory image or the first trajectory video.
  • the photographing device directly receives the collected image, or reads the image from the cache for image synthesis, resets the cache, and empties the data therein to provide space for subsequent data.
  • the imaging device performs image synthesis according to the current image and the brightness information of the past image, including: performing brightness synthesis processing on the current image and the previous composite image in sequence: at the same position of the image, the pixel with the current image is brighter Replaces the darker pixels in the last composite image. Since the camera continuously captures images, the composite image is also continuously generated. The composite image is actually a star-track image, and the composite image at different times shows the star-track effect at different times.
  • the first captured image is the first image
  • the next captured image is the second image
  • comparing the pixels of the first image with the pixels of the second image if the brightness of the second image is greater than the brightness of the first image, extracting the pixels of the second image to replace the pixels corresponding to the position of the first image, replacing The latter first image is used as the previous composite image described above.
  • the third image is taken, the third image is used as the current image, and at the same position, the pixel at the position where the third image is brighter is replaced with the previous composite image, and so on, and the last image obtained is used as the present embodiment.
  • the second trajectory image of the example is used as the current image
  • the pixel at the position where the third image is brighter is replaced with the previous composite image, and so on
  • the last image obtained is used as the present embodiment.
  • the second trajectory video needs to perform video encoding processing and the like on the composite image.
  • a trajectory with a small motion amplitude can be acquired.
  • the trajectory of the segment is an arc
  • the camera calculates the arc of the segment by calculating the arc of the segment, and the circle is a complete star track.
  • two different chords on the arc can be arbitrarily taken, and the intersection of the perpendicular lines of the two chords is the center of the circle where the arc is located, and the circle can be determined by the center of the circle.
  • Shape that is, determine the star track.
  • This embodiment removes the remaining portion of the circular arc, which is the trajectory of the future movement of the star.
  • the first trajectory image or the first trajectory video may be obtained according to the setting of the user, that is, the length of the trajectory in the first trajectory image or the first trajectory video is set by the user as the trajectory data, which may be the entire circle, or may be It is an arc that can be clearly seen by the human eye.
  • the trajectory data is added to the second trajectory image or the second trajectory video, processed by other brightness or the like to obtain a first trajectory image or a first trajectory video.
  • the generating unit 1021 when generating the second trajectory video of the moving object, includes:
  • the synthesizing subunit 10211 is configured to sequentially perform a luminance synthesizing process on the current image and the previous composite image to obtain all the synthesized images;
  • the encoding subunit 10212 is configured to perform video encoding processing on all of the composite images
  • the generating subunit 10213 is configured to generate the second trajectory video from the video encoded processed composite image.
  • the process of performing the brightness synthesis process on the current image and the previous composite image is the same as that in the previous embodiment.
  • the difference is that the first image and all other composite images, that is, the first The image and all composite images are used as the material for the star track video.
  • the composite image or the intermittent captured composite image can be continuously captured.
  • Continuously capturing a composite image means that each time a composite image is synthesized, one is captured for video encoding processing, that is, all synthesized images are used as the material of the star track video.
  • the composite image and the captured composite image are subjected to video encoding processing in synchronization with two threads. Since the composite image is subjected to video encoding processing while shooting, it is not necessary to store the synthesized composite image.
  • Interval grabbing refers to the selective capture of a portion of a composite image as a material for a star-track video.
  • the interval mode can be a manual interval mode or an automatic interval mode.
  • the manual interval mode refers to providing an operation interface for the user to click to trigger the captured image data, such as clicking the screen to capture the currently synthesized composite image (when there is a preview, that is, the current preview image);
  • the automatic interval mode refers to The composite image is captured at a preset time interval, that is, a composite image is captured every preset time.
  • the interval for capturing the composite image may be longer than the interval at which the camera captures the image (ie, the exposure time), avoiding capturing the same composite image two or more times, or reducing the size of the final synthesized video file.
  • a composite image can be captured every 1 to 2 Min, which is the current composite image and the current track image. Then video encoding the captured composite image
  • the method is the same as the related art, and the method for the video encoding processing of the composite image is the same as that of the related art, and is not described here.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the above technical solution can shorten the time of shooting the trajectory of the moving object, realize fast shooting, and improve the user experience.

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Abstract

L'invention concerne un procédé et un dispositif pour prise de vue de suivi d'un objet mobile. Le procédé de prise de vue de suivi d'un objet mobile comprend les étapes suivantes: acquérir une image d'un objet mobile au moyen d'une caméra lorsque la prise de vue commence; et terminer le suivi mobile de l'objet mobile en fonction de l'image de manière à obtenir une première image de suivi ou une première vidéo de suivi de l'objet mobile. Grâce à cette solution technique, le temps de prise de vue de suivi de l'objet mobile peut être réduit, et une prise de vue rapide peut être réalisée.
PCT/CN2015/083196 2014-07-28 2015-07-02 Procédé et dispositif pour prise de vue de suivi d'un objet mobile Ceased WO2016015544A1 (fr)

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