point spread function parameters
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 ...reconstruction parameters in a clinical ...a function of lesion size (SUV curve) up to 12 mm ...
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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 ...
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Quantification of myocardial blood flow with 82Rb: Validation with 15O-water using time-of-flight and point-spread-function modeling
... term did not greatly impact Renkin-Crone fits estimated from global myocardial parameters, though omitting it resulted in greater differences between separate septal and lateral regional fits (Additional file 1: ...
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Blind Deconvolution of Medical Ultrasound Images Using a Parametric Model for the Point Spread Function
... reflectiviy function (TRF)/image to be estimated respectively, n is an additive white Gaussian noise (AWGN) and H ∈ R N × N is the system impulse re- sponse/point spread function (PSF) assumed ...
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Information Content in Inverse Source with Symmetry and Support Priors
... required parameters in order to represent the radiated field with a given degree of ...the point-spread function and hence the achievable ...
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The INTEGRAL IBIS/ISGRI System Point Spread Function and Source Location Accuracy
... range of S/N ratios and angles from the telescope axis. We have computed the offsets between the derived and catalogue source positions and compared their 90% con- fidence level dispersion to the theoretical PSLE values. ...
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Point Spread Function Determination in the Scanning Electron Microscope and its Application in Restoring Images Acquired at Low Voltage
... Various metrics and methods have been developed for the purpose of image quality assessment, including those based on peak signal-to-noise (PSNR), structural similarity (SSIM) (Wang et al., 2004), and image sharpness ...
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Point spread function modelling for wide-field small-aperture telescopes with a denoising autoencoder.
... PSF models and physical parameters (Rhodes et al. 2005, 2007; Makidon et al. 2007; Perrin et al. 2014). However, it is almost impossible to compute the PSFs of WFSATs directly, because WFSATs are seriously ...
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Estimation of the Microscope Point Spread Function by Using an Adaptive Image Deblurring Method
... As one of the most widespread techniques in biological investigation and dynamic process, light compound microscopy has used to analyze the optical properties of biological images. The optical microscope is often used to ...
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A Review on Point Spread Function Estimation TechniquesRitesh Pawar, Dr. Maitreyee Dutta
... In this review paper the main purpose is to carry the comparative study for the restoration of blurred image. The different restoration algorithms used different types of parameters for their restoration purpose. ...
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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
... the function due to it having more parameters than all the other ...maximum spread at approximately 45 degrees to the x ...the function is more pointed than that for the ...
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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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Image Restoration without Information of Blur Operator using Blind Deconvolution
... 2D function g(x, y) where x and y are spatial coordinates and the amplitude of function at any pair of coordinates is called intensity or gray level of that image at that ...is spread over several ...
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Studies on three dimensional point spread function energy distribution of biological microscopic imaging system
... As seen from Fig. 3, and Fig. 4, 1) The axial energy along the optical axis and the radial energy in the central layer of 3D-PSF decay rapidly with the axial and radial increase. 2) The greater the magnification, the ...
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Cross-sectional and longitudinal approaches in a survival mixture model
... longitudinal parameters, particularly the proportion of long-term survivors, ρ, since analytically this parameter is only a function of x but not ...for parameters involved in ρ may perform ...
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Beamforming Scheme for 2D Displacement Estimation in Ultrasound Imaging
... The apodization matrix is calculated using (9), that is, the inverse discrete Fourier transform of the desired pressure profile given in (33). This apodization function is shown in Figure 2. The inverse Fourier ...
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CMOS implementation of image deconvolution and mean field annealing
... Images degraded by imperfect sensors or transmission can be modeled usefully[6] as the sum of random noise image and a convolution of the true image with a point spread function or blurr[r] ...
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Algorithm for MTF estimation by histogram modeling of an edge
... Figures 5 and 6 demonstrate how the histograms of a sharp and a smooth edge must differ. The gray levels increase in the histogram from left to right. This also represents a monotonic spatial motion across the edge in ...
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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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