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
Holographic head-mounted display（HHMD） is a specific application of holography. The previous conventional computer-generated hologram（CGH） generation method has a large redundancy and suffers from a heavy computin...Holographic head-mounted display（HHMD） is a specific application of holography. The previous conventional computer-generated hologram（CGH） generation method has a large redundancy and suffers from a heavy computing burden in the HHMD. A low redundancy and fast calculation method is presented for a CGH that is suitable for an HHMD with the effective diffraction area recording method. For the limited pupil size of an observing eye, the size of the area producing an effective wavefront is very small, and the calculated amount can be dramatically reduced. A numerical simulation and an augmented virtual reality experimental system are presented to verify the proposed method. 1.5% of the calculation consumption of the conventional CGH generation method is used, and good holographically reconstructed images can be observed.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.
基金supported by the National "863" Program of China(No.2012AA011902)the National Natural Science Foundation of China(No.61575025)the Program of Beijing Science and Technology Plan(No.D121100004812001)
文摘Holographic head-mounted display（HHMD） is a specific application of holography. The previous conventional computer-generated hologram（CGH） generation method has a large redundancy and suffers from a heavy computing burden in the HHMD. A low redundancy and fast calculation method is presented for a CGH that is suitable for an HHMD with the effective diffraction area recording method. For the limited pupil size of an observing eye, the size of the area producing an effective wavefront is very small, and the calculated amount can be dramatically reduced. A numerical simulation and an augmented virtual reality experimental system are presented to verify the proposed method. 1.5% of the calculation consumption of the conventional CGH generation method is used, and good holographically reconstructed images can be observed.
