Edge-based electronic image stabilization

摘要

An image stabilization system applies a “pinned-edge” or “soft pinned edge” image stabilization technique to digital video to compensate for unwanted camera motion in a captured video. In these stabilization techniques, a warping function is applied to an image frame to achieve a non-uniform shifting of depicted points in the image frame such that a reference point is stabilized with respect to a reference frame. In pinned-edge image stabilization, the final stabilized output video has the same dimensions as the pre-stabilized input video captured by the image sensor. In soft pinned-edge image stabilization, the pre-stabilized input video has slightly larger dimensions than the stabilized output video but these larger dimensions are still reduced compared to traditional electronic image stabilization.

主权项

1. A method for stabilizing a digital video, the method comprising:
receiving a reference video frame depicting a scene, the reference video frame depicting a reference point represented by one or more pixels at a reference pixel location; receiving a second frame depicting at least a portion of the scene, wherein movement of the reference point between the first and second frame results in the reference point being depicted at a different pixel location in the second frame; non-uniformly shifting non-edge points depicted in the second frame by an amount based on distances of the non-edge points from an edge of the second frame and applying zero shift to edge points depicted in the second frame; and generating a stabilized video comprising a sequence of frames including the reference frame and the stabilized second frame, wherein depicted motion of the reference point between the first frame and the stabilized second frame is reduced relative to depicted motion of the reference point between the first frame and the second frame.