Defocus-dependent Thon-ring fading.
Sign Up to like & getrecommendations! Published in 2021 at "Ultramicroscopy"
DOI: 10.1016/j.ultramic.2021.113213
Abstract: The brightness of modern Schottky field-emission guns can produce electron beams that have very high spatial coherence, especially for the weak-illumination conditions that are used for single-particle electron cryo-microscopy in structural biology. Even so, many… read more here.
Keywords: thon ring; thon; dependent thon; defocus ... See more keywords
Symmetric visual response to positive and negative induced spherical defocus under monochromatic light conditions
Sign Up to like & getrecommendations! Published in 2018 at "Vision Research"
DOI: 10.1016/j.visres.2017.12.003
Abstract: HighlightsReduction of visual acuity is symmetric for positive and negative defocus.Optical vergence does not affect defocused visual acuity significantly.Visual system is capable of integrating chromatic aberration to detect the sign of defocus. ABSTRACT The purpose… read more here.
Keywords: positive negative; light conditions; spherical defocus; monochromatic light ... See more keywords
Temporal properties of positive and negative defocus on emmetropization
Sign Up to like & getrecommendations! Published in 2022 at "Scientific Reports"
DOI: 10.1038/s41598-022-07621-6
Abstract: Studying the temporal integration of visual signals is crucial to understand how time spent on different visual tasks can affect emmetropization and refractive error development. In this study we assessed the effect of interrupting positive… read more here.
Keywords: vision; emmetropization; day; defocus ... See more keywords
Effect of Simulated and Real Spherical and Astigmatism Defocus on Visual Acuity and Image Quality Score.
Sign Up to like & getrecommendations! Published in 2020 at "Optometry and Vision Science"
DOI: 10.1097/opx.0000000000001463
Abstract: SIGNIFICANCE Image simulation is a useful and efficient tool to explore the impact of spherical and astigmatic blur on visual acuity (VA) and image gradation. It could help to design new optical corrections more efficiently… read more here.
Keywords: astigmatism defocus; spherical astigmatism; defocus; image ... See more keywords
An Adaptive Defocus Three-Dimensional Measurement Method Based on Tabu Search and Combined Gray Code
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.2966761
Abstract: In the field of 3D measurement, digital fringe projection (DFP) techniques have become a hotspot of research and application due to its non-contact, low cost and high resolution characteristics, but the gamma effect caused by… read more here.
Keywords: tabu search; method; defocus; gray code ... See more keywords
BaMBNet: A Blur-Aware Multi-Branch Network for Dual-Pixel Defocus Deblurring
Sign Up to like & getrecommendations! Published in 2022 at "IEEE/CAA Journal of Automatica Sinica"
DOI: 10.1109/jas.2022.105563
Abstract: Reducing the defocus blur that arises from the finite aperture size and short exposure time is an essential problem in computational photography. It is very challenging because the blur kernel is spatially varying and difficult… read more here.
Keywords: blur; bambnet; defocus deblurring; dual pixel ... See more keywords
Self-Supervised Single-Image Depth Estimation From Focus and Defocus Clues
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Robotics and Automation Letters"
DOI: 10.1109/lra.2021.3092258
Abstract: Self-supervised depth estimation has recently demonstrated promising performance compared to the supervised methods on challenging indoor scenes. However, the majority of efforts mainly focus on exploiting photometric and geometric consistency via forward image warping and… read more here.
Keywords: single image; focus; defocus; image ... See more keywords
Simultaneous Estimation of Defocus and Motion Blurs From Single Image Using Equivalent Gaussian Representation
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Circuits and Systems for Video Technology"
DOI: 10.1109/tcsvt.2019.2944915
Abstract: The occurrence of motion blur along with defocus blur is a common phenomena in natural images. Usually, these blurs are spatially varying in nature for any general image and estimation of one type of blur… read more here.
Keywords: motion blurs; defocus motion; blur; defocus ... See more keywords
Image Defocus in an Airborne UWB VHR Microwave Photonic SAR: Analysis and Compensation
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2021.3108571
Abstract: With the exploration of synthetic aperture radar (SAR), the requirements for its functionality, precision, and response time are inevitably increasing, in which the technical core is the generation, reception, and processing of wideband signals with… read more here.
Keywords: image defocus; photonics; compensation; defocus ... See more keywords
Exploring Chromatic Aberration and Defocus Blur for Relative Depth Estimation From Monocular Hyperspectral Image
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Image Processing"
DOI: 10.1109/tip.2021.3071682
Abstract: This article investigates spectral chromatic and spatial defocus aberration in a monocular hyperspectral image (HSI) and proposes methods on how these cues can be utilized for relative depth estimation. The main aim of this work… read more here.
Keywords: aberration; depth; defocus; image ... See more keywords
MA-GANet: A Multi-Attention Generative Adversarial Network for Defocus Blur Detection
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Image Processing"
DOI: 10.1109/tip.2022.3171424
Abstract: Background clutters pose challenges to defocus blur detection. Existing approaches often produce artifact predictions in background areas with clutter and relatively low confident predictions in boundary areas. In this work, we tackle the above issues… read more here.
Keywords: blur detection; defocus blur; generative adversarial; detection ... See more keywords