Hologram, 全像投影

Holograms of protesters are shown on the screen during a rehearsal of a holographic demonstration called 'ghost protest,' in front of the Gwanghwamun, the main gate of the 14th-century Gyeongbok Palace, one of South Korea's well known landmarks, in Seoul. It's aim is to demand freedom of assembly and guarantee the right to peaceful assembly.
February 24, 2016
http://www.voanews.com/media/photogallery/february-24-2016-day-in-photos/3206555.html

全息摄影- 维基百科，自由的百科全书

全像術（英語：Holography），又稱全像投影,全像3D

表白必備：DIY手機3D影像Hologram！ - INSERT-Toronto Chinese Magazine