用于改善全息显示图像质量的低相干数字全息图合成方法。
Synthesis method from low-coherence digital holograms for improvement of image quality in holographic display.
作者信息
Mori Yutaka, Nomura Takanori
机构信息
Graduate School of Systems Engineering, Wakayama University, Wakayama, Japan.
出版信息
Appl Opt. 2013 Jun 1;52(16):3838-44. doi: 10.1364/AO.52.003838.
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.
在全息显示中，人们不希望在重建图像时观察到散斑噪声。提出了一种通过合成低相干数字全息图来提高重建图像质量的方法。由于低相干数字全息术，可以获得无散斑的全息图重建。图像传感器记录低相干数字全息图，并通过计算合成全息图。为了降低低相干数字全息图的随机噪声，提出了阈值处理和峰值提取两种方法。将所提方法的重建图像质量与高相干数字全息术的情况进行了比较。进行了定量评估以证实所提方法。此外，还展示了15人的视觉评估结果。
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