Scalable Motion-Aware Panoramic Videos

彬彬

Abstract

This work presents a method for obtaining perceptually natural

panoramic videos, that is, videos composed of wide-angle frames

where straight lines and object shapes are preserved. The shape

preservation for moving objects has a special treatment that ensures

temporal coherence. Energies describing these properties are

obtained for the case of a fixed omni-directional camera, and an optimization

procedure is presented. Our optimization works per-frame,

which makes the method scalable for arbitrarily long scenes.

Keywords: 2D Morphing and Warping, Panoramic Video.

1 Introduction

Recent developments in computational photography gave rise to

affordable omni-directional cameras, which are output video in the

equirectangular format. Applications in navigation, immersion, and

surveilance are the key driving forces of omni-directional video.

We consider a new use for the spherical videos captured by these

cameras: videos with wide-angle frames. We improve on recent

developments in the understanding of the distortions involved in

wide-angle images [Zorin and Barr 1995; Kopf et al. 2009; Carroll

et al. 2009], and study the implications of the introduction of the

time dimension.

Our method is divided into three phases: pre-processing, optimization

and post-processing. As in the work of [Carroll et al. 2009],

our pre-processing interface allows the user to select lines that are

to be straight in the final result video, as well as their final orientations.

The user can also specify the field-of-view (FOV) to be

considered in the input video. While these operations are performed,

our system detects the moving objects in the video using background

subtraction. Using this input, an optimization phase is performed

(see following sections). Finally, the post-processing stage consists

of specifying the rectangular area of the optimization results to store

in the output video.

彬彬

tc

精典，学习了！

菜刀吻电线

先垫一块，再说鸟

C.R.CAN

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tc

很有心,部分已收录自用,谢谢

奇

提醒猪猪，千万不能让你看见

菜刀吻电线

不错 非常经典  实用

奇

提醒猪猪，千万不能让你看见