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The Light Field Camera: Extended Depth of Field, Aliasing, and Superresolution
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2012Portable light field (LF) cameras have demonstrated capabilities beyond conventional cameras. In a single snapshot, they enable digital image refocusing and 3D reconstruction. We show that they obtain a larger depth of field but maintain the ability to reconstruct detail at high resolution.
Bishop, T.E., Favaro, Paolo
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Digitized optical microscopy with extended depth of field
Applied Optics, 1989Partial information about a 3-D object, such as a stereoscopic pair of projections, is sometimes more desirable than the whole 3-D information. We demonstrate how to (1) synthesize a clear projection of a small complex object from a succession of digitized images obtained by moving the object stepwise through the focal plane, (2) synthesize a clear ...
K, Itoh, A, Hayashi, Y, Ichioka
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Pattern image enhancement by extended depth of field
Microelectronics Reliability, 2014Abstract Most optical defect localization techniques such as dynamic laser stimulation or photon emission microscopy require a pattern image of the device to be taken. The main purpose is for device navigation, but it also enables the analyst to identify the location of the monitored activity by superimposing it onto the pattern image.
Chef, Samuel +5 more
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Computational superposition projector for extended depth of field and field of view
Optics Letters, 2013This Letter describes a projection system with extended depth of field (DOF) and field of view (FOV). In the proposed system, an input image is projected with varying focusing distances and optical axis directions, and the projected images are superposed on a three-dimensional screen to realize a three-dimensionally space-invariant point spread ...
Tomoya Nakamura +2 more
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Depth of field extended scattering imaging by light field estimation
Optics Letters, 2018Imaging through scattering media is challenging especially for three-dimensional scenarios. A lot of efforts have been made, but they suffer from tedious point spread function acquisition process or limited depth of field (DOF). In this Letter, a DOF extended scattering imaging method is proposed based on light field estimation.
Xin Jin +3 more
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Extending the depth of field of imaging systems using depth sensing camera
Signal, Image and Video Processing, 2022© 2022, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.Due to the physical properties of the imaging systems, images obtained by them can be suffered from the limited depth of field. In this work, an efficient approach based on the depth map of the scene for extending the depth field of the imaging ...
Florenc Skuka +2 more
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2012
In this thesis the extension of the depth of field of optical systems is investigated. The problem of achieving extended depth of field (EDF) while preserving the transverse resolution is also addressed. A new expression for the transport of intensity equation in the prolate spheroidal coordinates system is derived, with the aim of investigating the ...
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In this thesis the extension of the depth of field of optical systems is investigated. The problem of achieving extended depth of field (EDF) while preserving the transverse resolution is also addressed. A new expression for the transport of intensity equation in the prolate spheroidal coordinates system is derived, with the aim of investigating the ...
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Smart camera with extended depth of field
SPIE Proceedings, 2006A smart camera is studied that combines the blurring logarithmic asphere lens and maximum entropy processing to extend the depth of field 10 times over that of a conventional lens and to provide near diffraction-limited performance. For this camera, a circularly symmetric logarithmic lens with radially varying focus length provides an image with ...
Wanli Chi, Nicholas George
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Extended Depth of Field in Confocal Microscopy
Biophotonics Congress: Biomedical Optics Congress 2018 (Microscopy/Translational/Brain/OTS), 2018We present a new type of confocal microscope that simultaneously image a specimen at four different depths, thus providing volumetric imaging at video rate. Our technique is an attractive tool for in vivo high-speed volumetric calcium imaging.
Amaury Badon, Jerome Mertz
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Integral imaging with extended depth of field
SPIE Proceedings, 2005One of the main drawbacks on integral imaging systems is their limited depth of field. With the current state of sensor technology such limitation is imposed by the pixilated structure of cell detectors. So, depth of field only can be optimized by proper selection of system parameters. However, nowadays sensor technology experiments a fast development.
Manuel Martínez-Corral +3 more
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