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.
Highlights
Most technologies proposed for 3-D display like stereoscopic or multiview systems do not provide sufficient visual depth cues for observers to perceive depth in natural conditions
We show that the mean square error (MSE) between the images obtained from the direct binary search (DBS) method and the original hologram is optimal for the Downloaded From: https://www.spiedigitallibrary.org/journals/Optical-Engineering on 08 Nov 2021 Terms of Use: https://www.spiedigitallibrary.org/terms-of-use
Each time a pixel is toggled in the binary pattern, reconstruction is performed in parallel at multiple depths, and MSE is computed between the images and the corresponding reference plane obtained from the complex hologram
Summary
Most technologies proposed for 3-D display like stereoscopic or multiview systems do not provide sufficient visual depth cues for observers to perceive depth in natural conditions. The most basic technique to convert a complex hologram into a binary hologram is to perform a threshold operation, but the quality of the reconstruction is low.[13] A method relying on bidirectional error diffusion (BERD) was proposed to convert complex data into a phase-only hologram.[14] It can be adapted for the generation of binary holograms. Iterative methods such as the direct binary search (DBS) algorithm were reported.[15,16]. We propose to modify the DBS algorithm to take into account multiple reference planes and increase the efficiency when multiple objects are located at different depths
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