Measurement of depth representation using integral imaging for quality evaluation of computer-generated hologram

Soohyun Lee; Jeho Nam; Eun-Young Chang; Sung-Keun Lee; Kyungae Moon; Jinwoong Kim

doi:10.1117/12.2053512

5 June 2014 Measurement of depth representation using integral imaging for quality evaluation of computer-generated hologram

Soohyun Lee, Jeho Nam, Eun-Young Chang, Sung-Keun Lee, Kyungae Moon, Jinwoong Kim

Author Affiliations +

Proceedings Volume 9117, Three-Dimensional Imaging, Visualization, and Display 2014; 911706 (2014) https://doi.org/10.1117/12.2053512
Event: SPIE Sensing Technology + Applications, 2014, Baltimore, MD, United States

Abstract

We demonstrate the depth measurement method of holographic images using integral imaging. The depth information of holographic images can be obtained with a single capture by conventional integral imaging pickup system composed of a micro lens array (MLA) and an image sensor. In order to verify the feasibility of our proposed method, an elemental image set of holographic images formed by a MLA was generated by a computer, and then refocused images at different planes were reconstructed numerically using computational integral imaging reconstruction (CIIR) technique for depth measurement. Note that we set the distance between MLA and image sensor as focal length of micro lens for large depth of focus. From the numerical results, we can measure the depth representation of holographic images successfully. However, refocused images from an optically captured elemental image set provide poor depth discrimination due to expected error in distance between MLA and image sensor. Only an object in a particular narrow depth range can be focused clearly when the image sensor is placed out of the MLA focal plane. The simulated results in this condition matched reasonably with the experiment result.

Citation Download Citation

Soohyun Lee, Jeho Nam, Eun-Young Chang, Sung-Keun Lee, Kyungae Moon, and Jinwoong Kim "Measurement of depth representation using integral imaging for quality evaluation of computer-generated hologram", Proc. SPIE 9117, Three-Dimensional Imaging, Visualization, and Display 2014, 911706 (5 June 2014); https://doi.org/10.1117/12.2053512

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