Computer-generated holograms of three-dimensional realistic objects recorded without wave interference

Abstract

We propose a method of synthesizing computer-generated holograms of real-life three-dimensional ͑3-D͒ objects. An ordinary digital camera illuminated by incoherent white light records several projections of the 3-D object from different points of view. The recorded data are numerically processed to yield a two-dimensional complex function, which is then encoded as a computer-generated hologram. When this hologram is illuminated by a plane wave, a 3-D real image of the object is reconstructed.

Fourier, Fresnel, and Image CGHs of three-dimensional objects observed from many different projections

“…Therefore, in some cases this technique can replace the complicated interferometric process of hologram recording. It has been shown 2,3 that merging angular projections together in this technique yields a Fourier hologram equivalent to the well-known optical Fourier hologram 5 recorded by a coherent light source. In this study the procedure of computing a hologram is extended in order to create other types of CGHs.…”

“…Illuminating the CGH by a plane wave constructs an image of the original object with the desired 3-D cues. This method reduces the amount of computing operations to that of a CGH of 2-D objects, and more important, it enables synthesizing a hologram of both realistic 3 or computer-made 2,4 3-D objects. Therefore, in some cases this technique can replace the complicated interferometric process of hologram recording.…”

Review of three-dimensional holographic imaging by Fresnel incoherent correlation holograms

“…The process of beam interfering demands high levels of light intensity, extreme stability of the optical setup, and a relatively narrow bandwidth light source. More recently, three groups of researchers have proposed computing holograms of 3D incoherently illuminated objects from a set of images taken from different points of view [9][10][11][12] . This method, although it shows promising prospects, is relatively slow since it is based on capturing tens of scene images from different view angles.…”

Hologram Generation of 3D Objects Using Multiple Orthographic View Images

“…The generation of the hologram, however, is not easy due to the necessity of a coherent system using a laser [1]. A method synthesizing the hologram with incoherent multi-view images has been reported in order to eliminate the necessity of the coherent image system [2]. However, this method uses perspective projection images as view images, requiring some approximations, to get the desired hologram [3].…”