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 us...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.展开更多
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.
文摘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.
