Systems and methods for stabilizing videos
Visual content is captured by an image capture device during a capture duration. The image capture devices experiences motion during the capture duration. The intentionality of the motion of the image capture device is determined based on angular acceleration of the image capture device during the capture duration. A punchout of the visual content is determined based on the intentionality of the motion of the image capture device. The punchout of the visual content is used to generate stabilized visual content.
1. A system for stabilizing videos, the system comprising:
one or more physical processors configured by machine-readable instructions to:
obtain visual information, the visual information defining visual content captured by an image capture device during a capture duration, the visual content having a field of view;
obtain angular acceleration information, the angular acceleration information characterizing angular accelerations of the image capture device at different moments within the capture duration:
determine intentionality of motion of the image capture device as a function of progress through the capture duration based on the angular acceleration information, wherein:
the intentionality of the motion of the image capture device is determined as being fully intentional based on the angular acceleration of the image capture device being smaller than a fully intentional angular acceleration threshold value; and
the intentionality of the motion of the image capture device is determined as being fully unintentional based on the angular acceleration of the image capture device being greater than a fully unintentional angular acceleration threshold value, the fully intentional angular acceleration threshold value being smaller than the fully unintentional angular acceleration threshold value;
determine a viewing window for the visual content as the function of progress through the capture duration based on the intentionality of the motion of the image capture device, the viewing window defining one or more extents of the visual content; and
generate stabilized visual content of a video based on the viewing window, the stabilized visual content including a punchout of the one or more extents of the visual content within the viewing window.
2. The system of claim 1 , wherein the one or more physical processors are carried by the image capture device.
3. The system of claim 2 , wherein the image capture device further carries a display, and the stabilized visual content is presented on the display as a preview of the video.
4. The system of claim 3 , wherein the stabilized visual content is different from visual content of the video.
5. The system of claim 1 , wherein determination of the intentionality of the motion of the image capture device as being intermediately intentional includes determination of a value of intentionality between a fully intentional value and a fully unintentional value.
6. The system of claim 1 , wherein the intentionality of the motion of the image capture device is determined as values of a stabilizer state variable.
7. The system of claim 1 , wherein the viewing window for the visual content is determined as the function of progress through the capture duration based on the intentionality of the motion of the image capture device such that the viewing window for the visual content is centered on a center of the field of view for a portion of the capture duration in which the intentionality of the motion of the image capture device is determined as being fully intentional and the viewing window for the visual content deviates from the center of the field of view for a portion of the capture duration in which the intentionality of the motion of the image capture device is determined as being fully unintentional.
8. The system of claim 7 , wherein placement of the viewing window for the visual content with respect to the field of view of the visual content is determined based on a centering parameter that moves the viewing window towards the center of the field of view, wherein an impact of the centering parameter on the placement of the viewing window is determined based on the intentionality of the motion of the image capture device.
9. The system of claim 7 , wherein placement of the viewing window for the visual content with respect to the field of view of the visual content is determined based on an inertia parameter that maintains a portion of speed of movement of the viewing window, wherein an impact of the inertia parameter on the placement of the viewing window is determined based on the intentionality of the motion of the image capture device.
10. The system of claim 7 , wherein placement of the viewing window for the visual content with respect to the field of view of the visual content is determined based on a deviation parameter that limits deviation of the viewing window from the center of the field of view.
11. A method for stabilizing videos, the method performed by a computing system including one or more processors, the method comprising:
obtaining, by the computing system, visual information, the visual information defining visual content captured by an image capture device during a capture duration, the visual content having a field of view;
obtaining, by the computing system, angular acceleration information, the angular acceleration information characterizing angular accelerations of the image capture device at different moments within the capture duration;
determining, by the computing system, intentionality of motion of the image capture device as a function of progress through the capture duration based on the angular acceleration information, wherein:
the intentionality of the motion of the image capture device is determined as being fully intentional based on the angular acceleration of the image capture device being smaller than a fully intentional angular acceleration threshold value; and
the intentionality of the motion of the image capture device is determined as being fully unintentional based on the angular acceleration of the image capture device being greater than a fully unintentional angular acceleration threshold value, the fully intentional angular acceleration threshold value being smaller than the fully unintentional angular acceleration threshold value;
determining, by the computing system, a viewing window for the visual content as the function of progress through the capture duration based on the intentionality of the motion of the image capture device, the viewing window defining one or more extents of the visual content; and
generating, by the computing system, stabilized visual content of a video based on the viewing window, the stabilized visual content including a punchout of the one or more extents of the visual content within the viewing window.
12. The method of claim 11 , wherein the one or more processors are carried by the image capture device.
13. The method of claim 12 , wherein the image capture device further carries a display, and the stabilized visual content is presented on the display as a preview of the video.
14. The method of claim 13 , wherein the stabilized visual content is different from visual content of the video.
15. The method of claim 11 , wherein determination of the intentionality of the motion of the image capture device as being intermediately intentional includes determination of a value of intentionality between a fully intentional value and a fully unintentional value.
16. The method of claim 11 , wherein the intentionality of the motion of the image capture device is determined as values of a stabilizer state variable.
17. The method of claim 11 , wherein the viewing window for the visual content is determined as the function of progress through the capture duration based on the intentionality of the motion of the image capture device such that the viewing window for the visual content is centered on a center of the field of view for a portion of the capture duration in which the intentionality of the motion of the image capture device is determined as being fully intentional and the viewing window for the visual content deviates from the center of the field of view for a portion of the capture duration in which the intentionality of the motion of the image capture device is determined as being fully unintentional.
18. The method of claim 17 , wherein placement of the viewing window for the visual content with respect to the field of view of the visual content is determined based on a centering parameter that moves the viewing window towards the center of the field of view, wherein an impact of the centering parameter on the placement of the viewing window is determined based on the intentionality of the motion of the image capture device.
19. The method of claim 17 , wherein placement of the viewing window for the visual content with respect to the field of view of the visual content is determined based on an inertia parameter that maintains a portion of speed of movement of the viewing window, wherein an impact of the inertia parameter on the placement of the viewing window is determined based on the intentionality of the motion of the image capture device.
20. The method of claim 17 , wherein placement of the viewing window for the visual content with respect to the field of view of the visual content is determined based on a deviation parameter that limits deviation of the viewing window from the center of the field of view.