Content-and-disparity-aware stereoscopic video stabilization
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Content-and-disparity-aware stereoscopic video stabilization Shih-Syun Lin1 · Thi Ngoc Hanh Le2 · Pang-Yu Wu2 · Tong-Yee Lee2 Received: 30 April 2020 / Revised: 18 August 2020 / Accepted: 28 August 2020 / © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Filming stereoscopic videos has become easier with the development of science and technology, and such videos now proliferate on the Internet. Meanwhile, video stabilization is an important research topic. Thus, this study presents a method of stabilizing stereoscopic videos with preserving the disparities between objects in the frames. First, the feature points must be tracked and separated into many groups. We posit that the shaky motion is caused not only by translations but also by rotations. Thus, directly smoothing the path will not produce a similar trajectory so that we solve the shakiness of the turning before smoothing the path. To address such shakiness, we initially estimate the rotation angles between two adjacent frames. By determining the angle changes of all the frames, we can find out the preference of rotation in a video. Furthermore, the inconsistent angular velocity can be alleviated and the shakiness of the turning is solved by rotating the frame appropriately. Then, the B´ezier curve is utilized to smooth the trajectories. We split a trajectory into a set of subtrajectories and subsequently smooth the latter independently. Unlike previous researches, we split the trajectory according to the feature tracking rate to obtain similar trajectories in the original video path. After making subtrajectories smooth, we merge them to attain a smoothed trajectory. The joint of the two subtrajectories is replaced by their interpolation. Finally, we optimize the smoothness and context preservation to stabilize videos without requiring extensive clipping. Keywords Stabilization · Stereoscopic video · Trajectory · B´ezier curve · Optimization Tong-Yee Lee
[email protected] Shih-Syun Lin [email protected] Thi Ngoc Hanh Le [email protected] Pang-Yu Wu [email protected] 1
National Taiwan Ocean University, Keelung, Taiwan
2
National Cheng-Kung University, Tainan, Taiwan
Multimedia Tools and Applications
1 Introduction We often ignore hand shaking when shooting videos, but such this action may cause significant shaking in the final output. Many tips are available for preventing this situation, e.g., shooting a video slowly. However, these tips will restrict people from shooting certain types of videos, such as those that entail moving the camera quickly, and may have limited effects on stabilization. Nowadays, stereoscopic videos proliferate on the Internet. Removing the shaky motion in videos after shooting and maintaining the 3D quality become an important research topic. Many hardware-based stabilizers can help people stabilize videos spontaneously. However, it’s inconvenient when stabilizers are always carried. Therefore, this research topic is worth exploring. Shooting videos with hand-shaking may occur
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