Results 31 to 40 of about 278,785 (319)
Aberration correction in diagnostic ultrasound: A review of the prior field and current directions
Zeitschrift für Medizinische Physik, 2023 Medical ultrasound images are reconstructed with simplifying assumptions on wave propagation, with one of the most prominent assumptions being that the imaging medium is composed of a constant sound speed.
Rehman Ali +9 more
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DeepCorrect: Correcting DNN Models Against Image Distortions [PDF]
IEEE Transactions on Image Processing, 2019 In recent years, the widespread use of deep neural networks (DNNs) has facilitated great improvements in performance for computer vision tasks like image classification and object recognition. In most realistic computer vision applications, an input image undergoes some form of image distortion such as blur and additive noise during image acquisition ...
Tejas S. Borkar, Lina J. Karam
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Nonlinear signal distortion corrections through quantum sensing [PDF]
Applied Physics Letters, 2021 Having accurate gate generation is essential for precise control of a quantum system. The generated gate usually suffers from linear and nonlinear distortion. Previous works have demonstrated how to use a qubit to correct linear frequency distortions but have not commented on how to handle nonlinear distortions.
Kevin R. Chaves +3 more
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A Study of Correction to the Point Cloud Distortion Based on MEMS LiDAR System
Applied Sciences, 2021 Active imaging technology can perceive the surrounding environment and obtain three-dimensional information of the target. Among them, light detection and ranging (LiDAR) imaging systems are one of the hottest topics in the field of photoelectric active ...
Dongbing Guo +4 more
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UV Finite Field Theories on Noncommutative Spacetimes: the Quantum Wick Product and Time Independent Perturbation Theory [PDF]
, 2006 In this article an energy correction is calculated in the time independent perturbation setup using a regularised ultraviolet finite Hamiltonian on the noncommutative Minkowski space.
D. Bahns, M. Reed, Marcel Kossow
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Correcting B 0 inhomogeneity-induced distortions in whole-body diffusion MRI of bone
Scientific Reports, 2022 Diffusion-weighted magnetic resonance imaging (DWI) of the musculoskeletal system has various applications, including visualization of bone tumors. However, DWI acquired with echo-planar imaging is susceptible to distortions due to static magnetic field ...
Leonardino A. Digma +14 more
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An Exact Formula for Calculating Inverse Radial Lens Distortions
Sensors, 2016 This article presents a new approach to calculating the inverse of radial distortions. The method presented here provides a model of reverse radial distortion, currently modeled by a polynomial expression, that proposes another polynomial expression ...
Pierre Drap, Julien Lefèvre
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Demonstration of amplitude-distortion correction by modal dispersal and phase conjugation [PDF]
, 1987 We demonstrate experimentally and explain theoretically polarization-preserving imaging through a lossy amplitude-distorting medium. This is accomplished by propagating the beam, before its arrival at the lossy distorting medium, through a (multi) mode ...
Kyuma, Kazuo +3 more
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PLoS ONE, 2022 Magnetic Resonance images (MRIs) are employed in brain Stereotactic Radiosurgery and Radiotherapy (SRS/SRT) for target and/or critical organ localization and delineation.
Stefanos Theocharis +6 more
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Camera distortion self-calibration using the plumb-line constraint and minimal Hough entropy
, 2009 In this paper we present a simple and robust method for self-correction of camera distortion using single images of scenes which contain straight lines. Since the most common distortion can be modelled as radial distortion, we illustrate the method using
B. Tordoff +11 more
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