Mixed reality technologies provide real-time and immersive experiences,which bring tremendous opportunities in entertainment,education,and enriched experiences that are not directly accessible owing to safety or cost....Mixed reality technologies provide real-time and immersive experiences,which bring tremendous opportunities in entertainment,education,and enriched experiences that are not directly accessible owing to safety or cost.The research in this field has been in the spotlight in the last few years as the metaverse went viral.The recently emerging omnidirectional video streams,i.e.,360°videos,provide an affordable way to capture and present dynamic real-world scenes.In the last decade,fueled by the rapid development of artificial intelligence and computational photography technologies,the research interests in mixed reality systems using 360°videos with richer and more realistic experiences are dramatically increased to unlock the true potential of the metaverse.In this survey,we cover recent research aimed at addressing the above issues in the 360°image and video processing technologies and applications for mixed reality.The survey summarizes the contributions of the recent research and describes potential future research directions about 360°media in the field of mixed reality.展开更多
Constraint-based solid modeling is the kernel part of current CADsystems. It has been widely used in supporting detailed design and variational design. However, it cannot support early stage design and is not easy-to-...Constraint-based solid modeling is the kernel part of current CADsystems. It has been widely used in supporting detailed design and variational design. However, it cannot support early stage design and is not easy-to--use becauseit demands fully detailed input description of a design. To solve these problems,researchers attempt to incorporate virtual reality techniques into geometric modeling systems. This paper presents a novel approach for interactive constraint-basedsolid modeling in a virtual reality environment. The approach allows the designerto construct and edit a constraint-based solid model by direct 3D manipulations,and ensures the created solid model to be precise by recognizing and solving geometric constraints. To effectively support 3D manipulations and change propagation,a new constraint-based solid model is adopted. In the model, besides the normalconstituents of the typical constraint-based solid model, some new attributes likeshape control points, location pattern and explicit shape constraints of a primitiveare defined. Guided by the location pattern, our algorithms for recognizing andsolving location constraints are real-time.展开更多
基金supported by the Marsden Fund Council managed by Royal Society of New Zealand under Grant Nos.MFP-20-VUW-180 and UOO1724Zhejiang Province Public Welfare Technology Application Research under Grant No.LGG22F020009the Key Lab of Film and TV Media Technology of Zhejiang Province of China under Grant No.2020E10015.
文摘Mixed reality technologies provide real-time and immersive experiences,which bring tremendous opportunities in entertainment,education,and enriched experiences that are not directly accessible owing to safety or cost.The research in this field has been in the spotlight in the last few years as the metaverse went viral.The recently emerging omnidirectional video streams,i.e.,360°videos,provide an affordable way to capture and present dynamic real-world scenes.In the last decade,fueled by the rapid development of artificial intelligence and computational photography technologies,the research interests in mixed reality systems using 360°videos with richer and more realistic experiences are dramatically increased to unlock the true potential of the metaverse.In this survey,we cover recent research aimed at addressing the above issues in the 360°image and video processing technologies and applications for mixed reality.The survey summarizes the contributions of the recent research and describes potential future research directions about 360°media in the field of mixed reality.
文摘Constraint-based solid modeling is the kernel part of current CADsystems. It has been widely used in supporting detailed design and variational design. However, it cannot support early stage design and is not easy-to--use becauseit demands fully detailed input description of a design. To solve these problems,researchers attempt to incorporate virtual reality techniques into geometric modeling systems. This paper presents a novel approach for interactive constraint-basedsolid modeling in a virtual reality environment. The approach allows the designerto construct and edit a constraint-based solid model by direct 3D manipulations,and ensures the created solid model to be precise by recognizing and solving geometric constraints. To effectively support 3D manipulations and change propagation,a new constraint-based solid model is adopted. In the model, besides the normalconstituents of the typical constraint-based solid model, some new attributes likeshape control points, location pattern and explicit shape constraints of a primitiveare defined. Guided by the location pattern, our algorithms for recognizing andsolving location constraints are real-time.
