| Project/Area Number |
07805007
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
SHIMOMURA Teruo Fac.of Eng., Kyushu Inst.of Tech., Professor, 工学部, 教授 (40038972)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1995: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Computer-generated holograms / Error diffusion method / Improved reconstructed images / Three dimensional images reconstruction / Computer simulation / Simulated annealing |
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| Research Abstract |
In this research, error diffusion method is investigated for improvement of images reconstructed. The remarkable summary is as follows ;
(1) Edge enhanced error diffusion
The characteristic of edge enhanced error diffusion is that threshold is altered by the position and the amplitude of image. Edge enhanced error diffusion gives superior reconstructed images in the case of using Peano scan, compared with any other scaninng and with traditional error diffusion using Peano scan.
(2) Computer simulation of three dimensional reconstruction from sectional type computer-generated holograms.
Simulation for three dimensional image reconstruction from computer-generated holograms of three dimensional objects is demonstrared. Simulation is preformed by calculation using discreate Fourier Transform. Reconstructed images in computer simulation coincide with those in optical experiment. This simulation is useful for a study of the impriovement of reconstructed images with computer-generated holograms of three dimensional objects.
(3) Simulated Annealing
Simulated annealing (SA) is applied to synthesize computer-generated holograms for three dimensional images reconstruction. The advantage of SA is the fact that global optimum hologram is obtained. Image quality depends on cost functions in SA.Combination of two cost functions gives superior reconstructed images compared to one cost function independently.
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