Results 31 to 40 of about 1,253,282 (331)
Multi-Object Deep-Field Digital Holographic Imaging Based on Inverse Cross-Correlation
Applied Sciences, 2023 To address the complexity of small or unique reconstruction distances in digital holography, we propose an inverse cross-correlation-based algorithm for the digital holographic imaging of multiplanar objects with a large depth of field. In this method, a
Jieming Zhao +5 more
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Indian Journal of Ophthalmology, 2021 Purpose: To study the relationship between the amplitude of accommodation (AA) measured by the Royal Air Force (RAF) rule and near addition (NA) prescribed in presbyopic patients to assess how far practice is different from theoretical recommendations ...
Susmi Deepu +5 more
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Multi-Focus Image Fusion Using Focal Area Extraction in a Large Quantity of Microscopic Images
Sensors, 2021 The non-invasive examination of conjunctival goblet cells using a microscope is a novel procedure for the diagnosis of ocular surface diseases. However, it is difficult to generate an all-in-focus image due to the curvature of the eyes and the limited ...
Jiyoung Lee +7 more
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Flexible Depth of Field Photography [PDF]
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2008 The range of scene depths that appear focused in an image is known as the depth of field (DOF). Conventional cameras are limited by a fundamental trade-off between depth of field and signal-to-noise ratio (SNR). For a dark scene, the aperture of the lens must be opened up to maintain SNR, which causes the DOF to reduce.
Sujit Kuthirummal +3 more
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Learning Wavefront Coding for Extended Depth of Field Imaging [PDF]
IEEE Transactions on Image Processing, 2019 Depth of field is an important factor of imaging systems that highly affects the quality of the acquired spatial information. Extended depth of field (EDoF) imaging is a challenging ill-posed problem and has been extensively addressed in the literature ...
U. Akpinar +4 more
semanticscholar +1 more source
Terminology - clarifying the current confusion and presenting the correct terminology
Frontiers in Ophthalmology, 2023 Most readers will be familiar with terminology (from meetings and conferences) that we, the editors, would deem to be incorrect or confusing. In general, we all tend to accept the information conveyed to us without really questioning what the terms truly
Ejaz Ansari, Ejaz Ansari
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Geometric and Optic Characterization of a Hemispherical Dome Port for Underwater Photogrammetry
Sensors, 2016 The popularity of automatic photogrammetric techniques has promoted many experiments in underwater scenarios leading to quite impressive visual results, even by non-experts. Despite these achievements, a deep understanding of camera and lens behaviors as
Fabio Menna +3 more
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High resolution digital holographic synthetic aperture applied to deformation measurement and extended depth of field method [PDF]
, 2010 This paper discusses the potential of the synthetic-aperture method in digital holography to increase the resolution, to perform high accuracy deformation measurement, and to obtain a three-dimensional topology map.
Claus, Daniel
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Depth of Field Extension in Laser Speckle Contrast Imaging
IEEE Access, 2020 A new technique that can increase the depth of field (DOF) for in vivo tissue imaging is presented. Extended DOF for the imaging of strongly scattering media is realized through combining laser speckle contrast imaging (LSCI) with light field (LF ...
Xiaohui Ma +5 more
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Effects of depth of field on eye movement
The Journal of Engineering, 2019 Depth of field is an important image feature, which can be used to enhance observers’ perception of stereopsis. To explore how the depth of field influenced observers’ attention in images, a within-subject experiment including two factors, two scenes and
Tingting Zhang +4 more
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