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   Articles with "defocus" as a keyword



Reblurring-Guided Single Image Defocus Deblurring: A Learning Framework with Misaligned Training Pairs

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recommendations! Published in 2024 at "International Journal of Computer Vision"

DOI: 10.1007/s11263-025-02522-3

Abstract: For single image defocus deblurring, acquiring well-aligned training pairs (or training triplets), i.e., a defocus blurry image, an all-in-focus sharp image (and a defocus blur map), is a challenging task for developing effective deblurring models.… read more here.

Keywords: defocus; image; image defocus; training pairs ... See more keywords

Alterations in Peripheral Refraction are Most Significant Just Before the Onset of Myopia: Evidence from Multispectral Refraction Topography

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recommendations! Published in 2025 at "Ophthalmology and Therapy"

DOI: 10.1007/s40123-025-01198-9

Abstract: This study aims to explore the characteristics of retinal defocus values (RDVs) during refractive development of Chinese children. In this cross-sectional study, 2125 children (2125 right eyes) aged 4–15 years were included and divided into… read more here.

Keywords: rdvs; topography; defocus; myopia ... See more keywords

Defocus-dependent Thon-ring fading.

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recommendations! 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

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recommendations! 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

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recommendations! 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

Automatic projector defocus measurement method with large depth of field for fringe projection system

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recommendations! Published in 2025 at "Measurement Science and Technology"

DOI: 10.1088/1361-6501/addff4

Abstract: The optimal defocus method is proved to be helpful to improve the accuracy of fringe projection measurement system. Using this characteristic, this paper proposes an automatic projector defocus method by using a self-designed control module… read more here.

Keywords: method; defocus; point; fringe projection ... See more keywords

Effect of Simulated and Real Spherical and Astigmatism Defocus on Visual Acuity and Image Quality Score.

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recommendations! 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

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recommendations! 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

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recommendations! 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

GB-ArcSAR Imaging Based on Optimized Construction of Reference Plane

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recommendations! Published in 2024 at "IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing"

DOI: 10.1109/jstars.2024.3352287

Abstract: Due to the specific arc-scanning way of ground-based arc-scanning synthetic aperture radar (GB-ArcSAR) to synthesize aperture, when a target's height is large enough and deviates much from the reference imaging plane, the image defocus would… read more here.

Keywords: reference plane; defocus; plane; reference ... See more keywords

Self-Supervised Single-Image Depth Estimation From Focus and Defocus Clues

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recommendations! 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