Gaussian point spread function
Blind Deconvolution of Medical Ultrasound Images Using a Parametric Model for the Point Spread Function
... Simulated ultrasound TRF of size 275 × 75 has been gener- ated according to generalized Gaussian distribution, as shown in Fig. 1(b). The pixels in the different regions are distributed according to GGDs with ...
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OPTIMIZATION OF HIGH VOLTAGE POWER SUPPLY FOR INDUSTRIAL MICROWAVE GENERATORS FOR ONE MAGNETRON
... 2.1 Point Spread Function (PSF) Calculation The PSF is the degree of spreading (blurring) a point of light (pixels) caused by imaging systems or techniques ...
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Point-spread function reconstructed PET images of sub-centimeter lesions are not quantitative
... as function of iterations (we stopped at 6 iterations 21 subsets, which is more than commonly ...3-mm Gaussian filter produced images that suppressed edge artifacts sufficiently to restore the expected ...
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A Review on Point Spread Function Estimation TechniquesRitesh Pawar, Dr. Maitreyee Dutta
... C. Multiscale Patch Based Image Restoration In this paper processing is based on the overlapping of the patches into the target image, restore the each patch separately and then by plain averaging merge the results for ...
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Estimation of the Microscope Point Spread Function by Using an Adaptive Image Deblurring Method
... Noise is a random disarrangement of detail in the image. The random distribution of noise is unknown, but In optical microscope images, the source of noise is either the digital imaging system or the signal itself (so ...
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The INTEGRAL IBIS/ISGRI System Point Spread Function and Source Location Accuracy
... a Gaussian function and the errors by the standard computation involving the curvature ma- trix (Press et ...assumes gaussian distribution of the counts and also independence between ...
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Point Spread Function Estimation for a Terahertz Imaging System
... the point spread function from the response of a point-source approximation will face the challenge of balancing resolution against ...for point sources include standard stars or ...
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Measurement of the point spread function of a noisy imaging system
... Generalized Gaussian that incorporated both pillbox, Gaussian, and a continuum of models in between, through the choice of a parameter, was also used to model the ...Generalized Gaussian performed ...
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Image Restoration without Information of Blur Operator using Blind Deconvolution
... The Gaussian kernel is used to blur the input ...edgetaper function which tapers the discontinuities along the blurred image ...edgetaper function to obtain restored image and restored point ...
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Point Spread Function Determination in the Scanning Electron Microscope and its Application in Restoring Images Acquired at Low Voltage
... Characterizing the PSF is quite difficult since no detector currently exists with sufficient spatial resolution, so it is done indirectly. Liddle et al. (2004) utilized a transmission electron microscope (TEM) to obtain ...
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Relationship between point spread function layers and biological microscopic image restoration based on the same space size
... of point spread function model [1] and the selection of its ...Dimensional Point Spread Function) model with the changes based on the depth ...the Gaussian 3D-PSF ...
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Educational Alternatives, Volume 12, 2014
... the point spread function (PSF) and the optical transfer function (OTF), which represents the Fourier transform of PSF, are the main characteristics of linear system, consisting of source of ...
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Evaluation of spatial dependence of point spread function-based PET reconstruction using a traceable point-like 22Na source
... the point source in air might have caused PSF over-correction of resolution because of un- acceptable noise properties, which is a clinically unrealistic ...detector-response function was determined by ...
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Algorithm for MTF estimation by histogram modeling of an edge
... Figure 2 is also referred to as the edge spread function. This function gives a very good description of what the line scan looks like. In this case you can see that the edge doesn’t appear to be an ...
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Background field Landau mode operators for the nucleon
... In this work we utilise the freedom of choosing asymmetric source and sink operators to con- struct correlation functions that provide better overlap with the energy eigenstates of the nucleon in a background magnetic ...
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Image Restoration Using Lucy Richardson Algorithm For X-Ray Images
... effectively when no information about the distortion (blurring and noise) is known. The algorithm restores the image and the point-spread function (PSF) simultaneously. The accelerated, damped ...
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Studies on three dimensional point spread function energy distribution of biological microscopic imaging system
... radial spread degree of energy is reduced; and the bright area in the central area of 3D-PSF spreads towards the left and right sides in the axial direction, the energy of 3D-PSF also spreads along both sides of ...
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Relativistic Bateman-Hillion Solutions for the Electromagnetic 4-Potential in Hermite-Gaussian Beams
... It is conventional in treating paraxial beams to assume time-harmonic solutions and neglect the second order axial derivative term in the wave equation. In Section 5 it is shown that an equivalent method is to start from ...
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Beamforming Scheme for 2D Displacement Estimation in Ultrasound Imaging
... The estimation of the displacement along the axial direc- tion has been shown to be very accurate due to the oscilla- tions that are naturally present in the RF signals. This paper proposes a method that provides—in the ...
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Blind deconvolution with an application to speckle imaging
... 7.5 The object error, the point spread function error, the convolution error and the total error achieved by the conjugate gradient algorithm for different number of frames at 1000 itera[r] ...
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