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Proceedings Paper

Depth measurement using engineering point spread function with coded aperture
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Paper Abstract

Depth extraction and recovery from the recorded image have been studied and applied in many fields such as biology, robotics, and computer vision. In some researches, the aperture in the imaging system is coded as a particular function in order to distinguish relative distances from the focal plane or recognize sampled points from the recorded image and the image captured through this coded aperture is useful to retrieve blurred images or acquire depth maps. These studies are associated with the shape of point spread function (PSF). In some approaches, diffraction-based engineered PSFs such as double-helix and cubic phase are applied to extract the depth information. In this paper, we propose a depth measurement method based on the optical analysis of the pupil function. It is well known that the PSF is represented as a Fourier transform of the product of pupil function and spherical phase in a coherent imaging system. Also, it is possible to estimate the intensity of the PSF corresponding to the distance of the object in an incoherent imaging system. Then the depth information is extracted from a snapshot image by inverse transform of the image.

Paper Details

Date Published: 21 February 2020
PDF: 7 pages
Proc. SPIE 11306, Practical Holography XXXIV: Displays, Materials, and Applications, 1130609 (21 February 2020); doi: 10.1117/12.2545541
Show Author Affiliations
Beomjun Kim, Kyungpook National Univ. (Korea, Republic of)
Daerak Heo, Kyungpook National Univ. (Korea, Republic of)
Hosung Jeon, Kyungpook National Univ. (Korea, Republic of)
Minwoo Jung, Kyungpook National Univ. (Korea, Republic of)
Hwi Kim, Korea Univ. (Korea, Republic of)
Joonku Hahn, Kyungpook National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 11306:
Practical Holography XXXIV: Displays, Materials, and Applications
Hans I. Bjelkhagen, Editor(s)

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