Restoring the spatial resolution of refocus images on 4D light field

JaeGuyn Lim; ByungKwan Park; JooYoung Kang; SeongDeok Lee

doi:10.1117/12.838830

27 January 2010 Restoring the spatial resolution of refocus images on 4D light field

JaeGuyn Lim, ByungKwan Park, JooYoung Kang, SeongDeok Lee

Proceedings Volume 7533, Computational Imaging VIII; 753310 (2010) https://doi.org/10.1117/12.838830
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States

Abstract

This paper presents the method for generating a refocus image with restored spatial resolution on a plenoptic camera, which functions controlling the depth of field after capturing one image unlike a traditional camera. It is generally known that the camera captures 4D light field (angular and spatial information of light) within a limited 2D sensor and results in reducing 2D spatial resolution due to inevitable 2D angular data. That's the reason why a refocus image is composed of a low spatial resolution compared with 2D sensor. However, it has recently been known that angular data contain sub-pixel spatial information such that the spatial resolution of 4D light field can be increased. We exploit the fact for improving the spatial resolution of a refocus image. We have experimentally scrutinized that the spatial information is different according to the depth of objects from a camera. So, from the selection of refocused regions (corresponding depth), we use corresponding pre-estimated sub-pixel spatial information for reconstructing spatial resolution of the regions. Meanwhile other regions maintain out-of-focus. Our experimental results show the effect of this proposed method compared to existing method.

Citation Download Citation

JaeGuyn Lim, ByungKwan Park, JooYoung Kang, and SeongDeok Lee "Restoring the spatial resolution of refocus images on 4D light field", Proc. SPIE 7533, Computational Imaging VIII, 753310 (27 January 2010); https://doi.org/10.1117/12.838830

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