Pixels and Panoramas: An Enhanced Cubic Mapping Scheme for Video\/Image-Based Virtual-Reality Scenes
Pixels and Panoramas: An Enhanced Cubic Mapping Scheme for Video\/Image-Based Virtual-Reality Scenes
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DOI：
10.1109/mce.2018.2880809
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发表时间：
2019-02
影响因子：
4.5
通讯作者：
Yibo Fan;Yize Jin;Zihao Meng;Xiaoyang Zeng
中科院分区：
文献类型：
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作者：
Yibo Fan;Yize Jin;Zihao Meng;Xiaoyang Zeng
虚拟现实（VR）正在导航、机器人和文档等各个领域迅速出现。与3D建模相比，球形全景视频以更方便的方式提供沉浸式和全向视图。然而，最先进的视频或图像编码技术，如高效视频编码或JPEG，需要矩形输入序列。传统上，球形视频被投影到平面或立方体上以便于编码，但是映射质量和编码效率没有被考虑。在这篇文章中，我们提出了GVS立方体投影，一种方法使用立方体斯奈德（Scube）投影沿着与渐变（GV）采样方法来生成全景视频。与其他方法相比，该方法具有更好的像素均匀性和更小的面积偏差。
Virtual reality (VR) is rapidly appearing in various fields, such as navigation, robotics, and documentation. Spherical panoramic video, compared to 3D modeling, provides immersive and omnidirectional views in a much more convenient way. However, state-of-the-art video or image-encoding techniques, such as high-efficiency video coding or JPEG, require rectangular input sequences. Spherical videos are traditionally projected onto a plane or a cube for convenient encoding, but mapping quality and encoding efficiency are not considered. In this article, we propose GVScube projection, a method using a cube-Snyder (Scube) projection along with a gradually varied (GV) sampling method to generate panoramic video. This method achieves better pixel uniformity and less area deviation than other methods.