title: Synthesis method from low-coherence digital holograms for improvement of image quality in holographic display.
abstract: In holographic displays, it is undesirable to observe the speckle noises with the reconstructed images. A method for improvement of reconstructed image quality by synthesizing low-coherence digital holograms is proposed. It is possible to obtain speckleless reconstruction of holograms due to low-coherence digital holography. An image sensor records low-coherence digital holograms, and the holograms are synthesized by computational calculation. Two approaches, the threshold-processing and the picking-a-peak methods, are proposed in order to reduce random noise of low-coherence digital holograms. The reconstructed image quality by the proposed methods is compared with the case of high-coherence digital holography. Quantitative evaluation is given to confirm the proposed methods. In addition, the visual evaluation by 15 people is also shown.
authors.affiliation: Graduate School of Systems Engineering, Wakayama University, Wakayama, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Mori
authors.forename: Takanori
authors.initials: T
authors.lastname: Nomura
mesh_terms: D003199:Computer Systems; D004867:Equipment Design; D005145:Face; D006696:Holography / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional; D015588:Observer Variation