A systematic approach is presented to exploit the rich field transformation capabilities of Electromagnetic (EM) metasurfaces for creating a variety of illusions using the concept of metasurface holograms. A system level approach to metasurface hologram synthesis is presented here. in which the hologram is co-designed with the desired object to be projected. A structured approach for ... https://www.ldartstudio.com/product-category/hair-colour-retouch/