Point Spread Function
A Review on Point Spread Function Estimation TechniquesRitesh Pawar, Dr. Maitreyee Dutta
... The estimation of the blind deconvolution and the blur kernel is very challenging and famous problem in the image processing and real world of computer vision [1]. In the many decades of image processing topic can ...
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Studies on three dimensional point spread function energy distribution of biological microscopic imaging system
... Dimensional Point Spread Function) used for biological image restoration processing determines the restoration effect and restoration time ...
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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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Impact of Time-of-Flight and Point-Spread-Function for Respiratory Artifact Reduction in PET/CT Imaging: Focus on Standardized Uptake Value
... which is widely used in evaluation of glucose metabolism, is prone to biological and technical factors (4-6). The SUVs, however, can vary depending on the method of reconstruction and parameters that are used (7-11). ...
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Quantification of myocardial blood flow with 82Rb: Validation with 15O-water using time-of-flight and point-spread-function modeling
... when point spread function (PSF) modeling is included in reconstruction, MBF esti- mates from 82 Rb PET may be higher [16]; however, such calculations were performed using an extraction model [11] ...
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Impact of point spread function modelling and time of flight on FDG uptake measurements in lung lesions using alternative filtering strategies
... PSF: point spread function; ROI: region of interest; SNR: signal-to-noise ratio; SUV: standardised uptake value; TLG: total lesion glycolysis; TOF: time of flight; UHD: Siemens ultraHD·PET ...
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Evaluation of spatial dependence of point spread function-based PET reconstruction using a traceable point-like 22Na source
... a point spread function (PSF), and PSF information was incorporated into a three-dimensional (3D) iterative re- construction [4, ...a point source within the scanner and acquiring scan data at ...
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Point Spread Function Estimation for a Terahertz Imaging System
... estimated point spread function is tested by using it to deconvolve images of a scene containing manufactured objects with good reflective ...the point spread function estimation ...
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Relationship between point spread function layers and biological microscopic image restoration based on the same space size
... 3D-PSF can be viewed as a three-dimensional matrix in discrete spatial. Its different cross-sections (x-y) along the central axis (optical axis or z-axis) of double funnel are corresponding to radial 2D-PSF (Two ...
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Point Spread Function and Modulation Transfer Function Engineering
... This thesis has presented a novel computational imaging approach to sensor protection using point spread function engineering to redistribute laser light on the sensor effectively reducing its peak ...
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Measurement of the point spread function of a noisy imaging system
... the Point Spread Function (PSF) of focused and defocused image acquisition systems, such as digital TV ...transfer function for the entire system can be ...
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Point Spread Function Determination in the Scanning Electron Microscope and its Application in Restoring Images Acquired at Low Voltage
... Higher resolutions are achievable with the development of field emission electron guns, which deliver higher brightness and smaller electron energy spread compared to earlier gun models (Egerton, 2010). Low ...
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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 ...a function of lesion size (SUV curve) up to 12 mm ...
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Restoration of noisy images blurred by deterministic or stochastic point spread function
... 2 In particular, we applied inverse filter, pseudoinverse filter least- squares , constrained least- squares filter and ·w iener filter in frequency domain to est imate the original real[r] ...
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Enhancing spectral unmixing by considering the point spread function effect
... The method predicts the land cover proportions at a finer spatial resolution inversely from the original coarse proportions before predicting the enhanced proportions i.e., the final pre[r] ...
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Effect of the Illuminating Point Spread Function and Roughness on the Speckle Correlation Field
... DOI: 10.4236/opj.2019.911015 166 Optics and Photonics Journal vestigated the statistical optical properties of fully developed speckle pattern. They considered the random phases of the interfering waves are uniformly ...
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The effect of the point spread function on sub pixel mapping
... in the pixel i.e., spectral unmixing predictions, and Lk Vij is the coarse proportion estimated as convolution.. of the current SPM realization.[r] ...
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Colour depth from defocus incorporating experimental point spread function measurements
... Images of a checkerboard pattern perpendicular to the camera's optical aXIs were obtained using the Basler A631 fc colour camera and the 24mm Sigma photographic lens for six equally spac[r] ...
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Image Restoration without Information of Blur Operator using Blind Deconvolution
... Without PSF- blind image deconvolution- in which blurring operator kernel is unknown that means image recovery is performed without degrading Point Spread Function which is more difficult. Blind ...
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Edge Detection of an Image Using an Improved Canny Algorithm
... Focal blur caused by a finite depth-of-field and finite point spread function. Penumbral blur caused by shadows created by light sources of non-zero radius. Edge detection is not a[r] ...
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