Abstract
A 3D scene is synthesized combining multiple optically recorded digital holograms of different objects. The novel idea consists of compositing moving 3D objects in a dynamic 3D scene using a process that is analogous to stop-motion video. However in this case the movie has the exciting attribute that it can be displayed and observed in 3D. We show that 3D dynamic scenes can be projected as an alternative to complicated and heavy computations needed to generate realistic-looking computer generated holograms. The key tool for creating the dynamic action is based on a new concept that consists of a spatial, adaptive transformation of digital holograms of real-world objects allowing full control in the manipulation of the object's position and size in a 3D volume with very high depth-of-focus. A pilot experiment to evaluate how viewers perceive depth in a conventional single-view display of the dynamic 3D scene has been performed.
Highlights
Since its discovery by Dennis Gabor, holography has encouraged the expectation for a spectacular 3D imaging and display system [1,2]
To create a dynamic 3D scene using only one hologram, we consider a digital hologram of a single object recorded at distance d
For the experimental validation of our method, we consider a digital hologram of a single object, a puppet of the Neapolitan tradition, “Pulcinella,” and an astronaut, recorded with an optimized optical configuration that optimizes recording parameters such as object-to-CCD distance and illumination intensity for a high quality hologram reconstruction
Summary
Since its discovery by Dennis Gabor, holography has encouraged the expectation for a spectacular 3D imaging and display system [1,2]. Considering, for example, holograms of two identical objects recorded with a single laser beam in a 3D imaged volume, and set at two different distances from the camera, gives as the result in the reconstruction process (either numerical or optical) two images that can have completely different quality because of the inverse-square law and because of speckles. The aforementioned problems imply that, generally speaking, holographic recording of a dynamic 3D scene, in which for example a single object is moved in an ample volume, requires an adaptive optical configuration that is optimized for each position of the object. For such an adaptive system, dynamically satisfying illumination, speckle reduction, and sampling conditions would not be feasible. The method is possible due to an innovative way in which we process the digital holograms that has never been implemented before
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