Results 201 to 210 of about 214,201 (239)
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Virtual Microscopy with Extended Depth of Field
Digital Image Computing: Techniques and Applications (DICTA'05), 2005In this paper, we describe a virtual microscope system, based on JPEG 2000, which utilizes extended depth of field (EDF) imaging. Through a series of observer trials we show that EDF imaging improves both the local image quality of individual fields of view (FOV) and the accuracy with which the FOVs can be mosaiced (stitched) together.
Andrew P. Bradley +2 more
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Extending the depth of field in microscopy: A review
2016 International Conference on Image and Vision Computing New Zealand (IVCNZ), 2016This paper investigates multi-focus image fusion methods in the context of microscope. Limited depth of field is one of the major limitations in microscopy. Objects which are thicker than the depth of field cannot be captured completely within one sharp image.
Anoop Suraj Ambikumar +2 more
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Extended Depth of Field in Microscope
Optics in the Life Sciences, 2013A cubic phase mask is used in an infinity microscope objective to extend depth of field. The mask is placed between the objective and tube lens, so that neither objective nor tube lens needs redesigning.
Tingyu Zhao, Guoqiang Li
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Extended depth-of-field microscopy
SPIE Proceedings, 2010In this paper, we present details of a scanning two-photon fluorescence microscope we have built with a nearisotropic scan rate. This means that the focal spot can be scanned at high speed along any direction in the specimen, without introducing systematic aberrations.
Christopher Smith +4 more
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Extending depth of field in noisy light field photography
2017 IEEE 8th International Conference on Awareness Science and Technology (iCAST), 2017A robust depth of field (DOF) extension algorithm was proposed based on the refocusing property of a light field photograph and the depth-from-defocus approach of multi-focus image fusing. The main techniques of the algorithm are depth estimation and all-in-focus image estimation. By making use of the redundancy of a light field photograph, we leverage
Shih-Shuo Tung +2 more
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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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Multiple-frame photography for extended depth of field
Applied Optics, 2013For extending the depth of field, we analyze the result of superimposing several snapshots, which are taken while changing the amount of focus error, at full pupil aperture. We unveil the use of a varifocal lens for controlling the amount of focus error, without modifying either the lateral magnification or light throughput.
Jorge, Ojeda-Castañeda +2 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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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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