Holograms cannot be "projected." They are virtual images, not real images. More to the point, the word "hologram" does not refer to the image, but to the image encoding technique. A hologram is a material object that encodes and presents a three-dimensional image. But you need to have the object, in order to have the image. No projection.
3-D real images can also be generated by stereoscopy, as in motion pictures, but that has nothing to do with holograms.
Holograms cannot be "projected." They are virtual images, not real images. More to the point, the word "hologram" does not refer to the image, but to the image encoding technique. A hologram is a material object that encodes and presents a three-dimensional image. But you need to have the object, in order to have the image. No projection.
3-D real images can also be generated by stereoscopy, as in motion pictures, but that has nothing to do with holograms.