AdaPIP: Adaptive picture-in-picture guidance for 360° film watching  

作　　者：Yi-Xiao Li Guan Luo Yi-Ke Xu Yu He Fang-Lue Zhang Song-Hai Zhang 

机构地区：[1]Department of Computer Science and Technology,Tsinghua University,Beijing,China,and Beijing National Research Center for Information Science and Technology(BNRist),Tsinghua University,Beijing,China [2]Key Laboratory of Space Utilization,Technology and Engineering Center for Space Utilization,Chinese Academy of Sciences,Beijing,China [3]Victoria University of Wellington,Wellington,New Zealand

出　　处：《Computational Visual Media》2024年第3期487-503,共17页计算可视媒体（英文版）

基　　金：supported by the National Natural Science Foundation of China(Project Number 62132012);the Beijing Science and Technology Program(Project Number Z221100007722001);the Tsinghua-Tencent Joint Laboratory for Internet Innovation Technology.

摘　　要：360°videos enable viewers to watch freely from different directions but inevitably prevent them from perceiving all the helpful information.To mitigate this problem,picture-in-picture(PIP)guidance was proposed using preview windows to show regions of interest(ROIs)outside the current view range.We identify several drawbacks of this representation and propose a new method for 360° film watching called AdaPIP.AdaPIP enhances traditional PIP by adaptively arranging preview windows with changeable view ranges and sizes.In addition,AdaPIP incorporates the advantage of arrow-based guidance by presenting circular windows with arrows attached to them to help users locate the corresponding ROIs more efficiently.We also adapted AdaPIP and Outside-In to HMD-based immersive virtual reality environments to demonstrate the usability of PIP-guided approaches beyond 2D screens.Comprehensive user experiments on 2D screens,as well as in VR environments,indicate that AdaPIP is superior to alternative methods in terms of visual experiences while maintaining a comparable degree of immersion.

关 键 词：360°videos picture-in-picture(PIP) virtual reality(VR) visual guidance 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]