Computer-Generated Holograms for White Light Reconstruction

Yoshikawa, Hiroshi

doi:10.1007/0-387-31397-4_8

Cited by 13 publications

(11 citation statements)

References 25 publications

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“…The proposed method follows the principles in [15] that decompose the hologram formation process into a 1-D pair as shown in Fig. 1.…”

Section: Proposed Methods For Generating Holograms From Sublinesmentioning

confidence: 99%

“…A detailed description of the fast generation of white light holograms has been reported in [15]; only a brief outline is presented here. Figure 1 shows a block diagram of the idea.…”

Section: Fast Generation Of a White Light Hologrammentioning

confidence: 99%

“…In the first, image holograms are generated in real time with the constraints that the scene objects must be positioned in close proximity to the hologram [12]. The second method generates horizontal parallax only (HPO) rainbow holograms [13][14][15] that overcome both of the aforementioned problems. In this approach a 3-D scene is first partitioned into a vertical stack of regularly spaced scan planes.…”

Section: Introductionmentioning

confidence: 99%

“…We propose a method based on the principles outlined in [15] for the generation of holograms from 1-D sublines that provide enhancement of the visual quality of the reconstructed image. In essence, a 3-D scene is partitioned into a horizontal stack of regularly spaced vertical subplanes, each contributed to a subline.…”

Section: Introductionmentioning

confidence: 99%

“…In Section 2 we give a brief outline of the work in [15] as an introduction to the proposed method, which is presented in Section 3. We describe the formulation of a multirate filter to expand the sublines to the hologram and illustrate how the interpolation process can be incorporated into the architecture.…”

Section: Introductionmentioning

confidence: 99%

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Fast generation of Fresnel holograms based on multirate filtering

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One of the major problems in computer-generated holography is the high computation cost involved for the calculation of fringe patterns. Recently, the problem has been addressed by imposing a horizontal parallax only constraint whereby the process can be simplified to the computation of one-dimensional sublines, each representing a scan plane of the object scene. Subsequently the sublines can be expanded to a two-dimensional hologram through multiplication with a reference signal. Furthermore, economical hardware is available with which sublines can be generated in a computationally free manner with high throughput of approximately 100 M pixels/second. Apart from decreasing the computation loading, the sublines can be treated as intermediate data that can be compressed by simply downsampling the number of sublines. Despite these favorable features, the method is suitable only for the generation of white light (rainbow) holograms, and the resolution of the reconstructed image is inferior to the classical Fresnel hologram. We propose to generate holograms from one-dimensional sublines so that the abovementioned problems can be alleviated. However, such an approach also leads to a substantial increase in computation loading. To overcome this problem we encapsulated the conversion of sublines to holograms as a multirate filtering process and implemented the latter by use of a fast Fourier transform. Evaluation reveals that, for holograms of moderate size, our method is capable of operating 40,000 times faster than the calculation of Fresnel holograms based on the precomputed table lookup method. Although there is no relative vertical parallax between object points at different distance planes, a global vertical parallax is preserved for the object scene as a whole and the reconstructed image can be observed easily.

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“…The proposed method follows the principles in [15] that decompose the hologram formation process into a 1-D pair as shown in Fig. 1.…”

Section: Proposed Methods For Generating Holograms From Sublinesmentioning

confidence: 99%

“…A detailed description of the fast generation of white light holograms has been reported in [15]; only a brief outline is presented here. Figure 1 shows a block diagram of the idea.…”

Section: Fast Generation Of a White Light Hologrammentioning

confidence: 99%