Generation of binary holograms for deep scenes captured with a camera and a depth sensor

Abstract

Abstract. This work presents binary hologram generation from images of a real object acquired from a Kinect sensor. Since hologram calculation from a point-cloud or polygon model presents a heavy computational burden, we adopted a depth-layer approach to generate the holograms. This method enables us to obtain holographic data of large scenes quickly. Our investigations focus on the performance of different methods, iterative and noniterative, to convert complex holograms into binary format. Comparisons were performed to examine the reconstruction of the binary holograms at different depths. We also propose to modify the direct binary search algorithm to take into account several reference image planes. Then, deep scenes featuring multiple planes of interest can be reconstructed with better efficiency.

Interferenceless coded aperture correlation holography–a new technique for recording incoherent digital holograms without two-wave interference

“…Moreover, higher optical power is usually needed to compensate the loss due to beam splitting, and a special care is sometimes required to equalize the power of the interfering beams, in order to obtain high fringe visibility. The above drawbacks, arising from the interference requirement, have motivated researchers to develop simpler, but equally capable and sometimes better, interferenceless holography techniques [7,8].…”

A year in review

“…13 The active electro-optical sensing special section included top-cited papers on hyperentanglement 14 and deep turbulence wavefront sensing, 15 while papers on anisoplanatic imaging through turbulence 9 (the only top-ten downloaded and cited) and atmospheric turbulence mitigation algorithms 16 from the long-range imaging special section were part of the list. The remainder included a paper on extended wavelength infrared photodetectors 17 from the infrared detectors special section, along with regular papers on binary holograms for depth visualization 18 and channel capacity of optical data links. 19 Six of these ten papers are available with open access.…”

Enhancing the Quality of Sampled Phase-Only Hologram (SPOH) Based on Time-Division Comb Filtering

“…Although the noise problem can be reduced through averaging the reconstructed images of multiple holograms, or the mixed region methods [10], the computation time will be further increased. Another iterative approach, known as direct binary search (DBS) [11,12], works on similar principles as the GSA. In comparison with the latter, DBS results in reconstructed images of higher quality, but the computational efficiency is substantially lowered.…”