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Response if an optical system to a point source of light
The point spread function (PSF) describes the response of a focused optical imaging system to an idealized point source of light. In casual terms, for
Point_spread_function
Characteristic of an optical system
transfer function is defined as the Fourier transform of the point spread function (PSF, that is, the impulse response of the optics, the image of a point source)
Optical_transfer_function
Study of classical optics using Fourier transforms
function in this case is typically referred to as a point spread function, since the mathematical point of light in the object plane has been spread out
Fourier_optics
Viewing of objects which are too small to be seen with the naked eye
an "hourglass" shape of this point source in the third (axial) dimension. This shape is called the point spread function (PSF) of the microscope imaging
Microscopy
Optical imaging technique
background part. In contrast, a confocal microscope uses point illumination (see Point Spread Function) and a pinhole in an optically conjugate plane in front
Confocal_microscopy
Function specifying the behavior of a component in an electronic or control system
optical transfer function is the Fourier transform of the point spread function (a function of spatial frequency). Transfer functions are commonly used
Transfer_function
Reconstruction of a filtered signal
with a point spread function (PSF), that is, a mathematical function that describes the distortion in terms of the pathway a theoretical point source
Deconvolution
Radio telescope array
comparatively dense sampling of the uv-plane, and gives a native point spread function which is sufficiently good that much-less-complex algorithms can
Deep_Synoptic_Array
Diffraction pattern in optics
human eye is about 2.1, corresponding to a diffraction-limited point spread function with approximately 1 μm diameter. However, at this f-number, spherical
Airy_disk
Proportion of observed intensity to ideal intensity, in astronomical imaging
of the point-spread function by a single number, as the Strehl Ratio does, will be meaningful and sensible only if the point-spread function is little
Strehl_ratio
Series of techniques in optical microscopy
emitters and fitting their images with the point spread function (PSF). Normally, the width of the point spread function (~ 250 nm) limits resolution. However
Super-resolution_microscopy
Optical system with resolution performance at the instrument's theoretical limit
the point spread functions (PSF). The point spread function of a diffraction limited circular-aperture lens is simply the Airy disk. The point spread function
Diffraction-limited_system
Procedure for recovering a blurred image
recovering an underlying image that has been blurred by a known point spread function. It was named after William Richardson and Leon B. Lucy, who described
Richardson–Lucy_deconvolution
a point spread function (PSF) weighted within a solid angle larger than the pixel. From a signal processing point of view, ignoring the point spread function
Cone_tracing
Microscopic optical resolution test device
approximate full width at half maximum of the imaging point spread function, and distance two point objects of equal intensity can be distinguished (with
1951 USAF resolution test chart
1951_USAF_resolution_test_chart
Output of a dynamic system when given a brief input
response Gibbs phenomenon Küssner effect Linear response function LTI system theory Point spread function Pre-echo Step response System analysis Time constant
Impulse_response
Ability of any image-forming device to distinguish small details of an object
between diffraction and aberration can be characterised by the point spread function (PSF). The narrower the aperture of a lens the more likely the PSF
Angular_resolution
giving the smallest image possible with that given lens (called a point spread function or PSF), calculation of the encircled energy of the resulting image
Encircled_energy
pupil function is also directly related to the point spread function by its Fourier transform. As such, the effect of aberrations on the point spread function
Pupil_function
{\displaystyle FS} is a convolution of V {\displaystyle V} and a point spread function (PSF): V ∗ P S F = F S . {\displaystyle V*PSF=FS.} Thus, the 3D
Light_field_microscopy
Computational algorithm for radio astronomy
point sources. It will iteratively find the highest value in the image and subtract a small gain of this point source convolved with the point spread
CLEAN_(algorithm)
accurately reconstruct point spread functions, whose wings cannot be accurately portrayed by either a Gaussian or Lorentzian function. The Moffat distribution
Moffat_distribution
Process of removing blurring artifacts from images
point spread function and is convolved with a hypothetical sharp image S to get B, where both the S (which is to be recovered) and the point spread function
Deblurring
Signal-processing procedure
"blurred" images in the presence of a poorly determined or unknown point spread function (PSF). Regular linear and non-linear deconvolution techniques utilize
Blind_deconvolution
Fluorescence microscopy imaging method
image of a point source observed under a microscope is an extended spot, corresponding to the Airy disk (a section of the point spread function) of the imaging
Photoactivated localization microscopy
Photoactivated_localization_microscopy
Israeli physicist
Michaeli & Yoav Shechtman. "Multicolor localization microscopy and point-spread-function engineering by deep learning". Optics Express.{{cite journal}}:
Yoav_Shechtman
Historically important optical effect
point source. From an extended source the Arago spot is only affected marginally, since one can interpret the Arago spot as a point-spread function.
Arago_spot
Imaging and diffraction using electrons that pass through samples
detection include detective quantum efficiency (DQE), point spread function (PSF), modulation transfer function (MTF), pixel size and array size, noise, data
Transmission electron microscopy
Transmission_electron_microscopy
such is performed by imaging a point source and use the point source image, which is called the Point Spread Function (PSF) to restore the image information
Image restoration by artificial intelligence
Image_restoration_by_artificial_intelligence
Microscope that uses visible light
illumination microscopy) is a light optical process of the so-called point spread function (PSF) engineering. These are processes which modify the PSF of a
Optical_microscope
mesoscopic traffic flow simulation software. PSF Lab - calculates the point spread function of an optical microscope under various imaging conditions based
List of computer simulation software
List_of_computer_simulation_software
Technique for astrophotography
but generally produces multiple sharp copies of the image (the point spread function has speckles). New methods were used which took advantage of this
Lucky_imaging
Standard candle used to estimate distances to galaxies
subtracted. The SBF pattern is evident as the transform of the point spread function in the Fourier domain. The amplitude of the spectrum gives the luminosity
Surface brightness fluctuation
Surface_brightness_fluctuation
Light bending by mass between source and observer
error: the intrinsic shape of galaxies, the tendency of a camera's point spread function to distort the shape of a galaxy and the tendency of atmospheric
Gravitational_lens
Type of optical device
supernovae, the bimodal character of the point spread function for adjacent stars, other nearby satellites, point-source light pollution from large cities
Star_tracker
scattering behaves according to a point spread function (PSF) that gives energy as a radial function of distance from the point that the electron beam (e-beam)
Proximity effect (electron beam lithography)
Proximity_effect_(electron_beam_lithography)
optical process of the so-called point spread function-engineering. These are processes which modify the point spread function (PSF) of a microscope in a suitable
Vertico spatially modulated illumination
Vertico_spatially_modulated_illumination
Calculation technique
simulations, ray tracing does not use the expected or calculated point spread function (PSF) of a telescope and instead traces the journey of each photon
Ray_tracing_(physics)
Mathematical function in general imaging
different but similar phenomena in light Optical transfer function Point spread function Transmission electron microscopy Wade, R. H. (October 1992)
Contrast_transfer_function
Convention for measuring angles on the sky
sphere becomes the direction of the angle of high resolution in the point spread function. The concept of the position angle is inherited from nautical navigation
Position_angle
particle tracking, including multifocal plane microscopy, double helix point spread function microscopy, and introducing astigmatism via a cylindrical lens or
Single-particle_tracking
Type of filter
Wiener filter. Information field theory Deconvolution Wiener filter Point spread function Blind deconvolution Fourier transform Wikimedia Commons has media
Wiener_deconvolution
Lithographic technique that uses a scanning beam of electrons
Vol. 8683. p. 868311. doi:10.1117/12.2008886. The Significance of Point Spread Functions with Stochastic Behavior in Electron-Beam Lithography Ichimura,
Electron-beam_lithography
Class of operator mapping
of functions on a topological space to another space of functions on some domain in such a way that the value of the function output at a given point cannot
Nonlocal_operator
Microscope observing a thin depth of a cell
a point spread function (PSF) to sample the original signal. As such, image resolution is highly dependent on the number of detectors and the point spread
Total internal reflection fluorescence microscope
Total_internal_reflection_fluorescence_microscope
Fluorescence imaging technique
sectioning produced by multiphoton microscopes is a result of the point spread function of the excitation. The concept of two-photon excitation is based
Two-photon excitation microscopy
Two-photon_excitation_microscopy
Optical correction instrument
the aberrated point spread function was sharp enough to permit high-resolution observations of bright objects, and spectroscopy of point sources was affected
Corrective Optics Space Telescope Axial Replacement
Corrective_Optics_Space_Telescope_Axial_Replacement
Proposed NASA space telescope
requirements include greatly enhanced sensitivity, a sub-arcsecond point spread function stable across the telescope's field of view, and very high spectral
Lynx_X-ray_Observatory
Graphical quality
sub-pixel resolution can be quantified by measuring the point spread function (PSF) of an isolated point in the image. If the image does not contain isolated
Sub-pixel_resolution
Computer software
FarPoint Spread is a suite of Microsoft Excel-compatible spreadsheet components available for .NET, COM, and Microsoft BizTalk Server. Software developers
FarPoint_Spread
NASA/ESA space telescope launched in 1990
expected. Images of point sources spread out over a radius of more than one arcsecond, instead of having a point spread function (PSF) concentrated within
Hubble_Space_Telescope
Form of error in digital signals; spurious signals near sharp transitions
Fraunhofer diffraction yields the Airy disk as point spread function, which has a ringing pattern. The Bessel function of the first kind, J 0 , {\displaystyle
Ringing_artifacts
g., aberrations) in the lens, the impulse response, a.k.a. the point spread function (PSF) of the optical system, cannot be a Dirac delta, thus, imposing
Oversampled binary image sensor
Oversampled_binary_image_sensor
Type of wavefront sensor
A four-faceted prism, with its tip centered at the peak of the point spread function, will generate four identical pupil images in the absence of optical
Pyramid_wavefront_sensor
Optical device which transmits and refracts light
zero, since diffraction places a lower limit on the size of the point spread function. This is called the diffraction limit. Lenses do not form perfect
Lens
Topics referred to by the same term
progressive scan video using interlaced equipment Point spread function, the response of an imaging system to a point source Protein Segment Finder, a search engine
PSF
Quality of an image being out of focus
diopters). In linear systems theory, the point image (i.e. the blur disk) is referred to as the point spread function (PSF). The retinal image is given by
Defocus_aberration
information from the imaging plane information is a deconvolution with a point spread function defined by the boundary value problem. In the specific case of a
Scanning quantum dot microscopy
Scanning_quantum_dot_microscopy
Microscope software
software program that allows the calculation of the illumination point spread function (PSF) of a confocal microscope under various imaging conditions
PSF_Lab
tomography. Transconvolution enables a subsequent manipulation of the Point spread function (PSF) in already recorded images. Properties of an image such as
Transconvolution
molecule orientation anisotropy and direction within the optical point spread function. Coherent anti-Stokes Raman spectroscopy (CARS) is a non- linear
Rotating-polarization coherent anti-Stokes Raman spectroscopy
Rotating-polarization_coherent_anti-Stokes_Raman_spectroscopy
Topics referred to by the same term
Look up spread in Wiktionary, the free dictionary. Spread may refer to: Spread, West Virginia Spread (film), a 2009 film. $pread, a quarterly magazine
Spread
Interference phenomenon of waves
equation Fresnel imager Fresnel number Fresnel zone Kikuchi lines Point spread function Precession electron diffraction Ptychography Quasioptics Refraction
Diffraction
limit, so the image is a spot which is larger than the bead itself (point spread function), the center of the spot represents the projection on the X-Y plane
Tethered_particle_motion
Mixing signals from many telescopes to produce images with high angular resolution
distributed antennas to nearly fully sample the uv plane. This gives a point spread function that allows much simpler reconstruction, so images can be computed
Aperture_synthesis
S-shaped curve
logistic function is thus rotationally symmetrical about the point (0, 1/2). The logistic function is the inverse of the natural logit function logit
Logistic_function
Optical microscope that uses fluorescence and phosphorescence
subsequent deconvolution was done using an experimentally derived point spread function. Epifluorescent imaging of the three components in a dividing human
Fluorescence_microscope
Pair of telescopes mounted side-by-side
interference between light from the two paths causing a distortion of the Point Spread Function and a deterioration of the image. Resolution and contrast significantly
Binoculars
Ability of an imaging system to resolve detail
laser-scanned microscopes, the full-width half-maximum (FWHM) of the point spread function is often used to avoid the difficulty of measuring the Airy disc
Optical_resolution
microscopy differs from Two-photon excitation microscopy in their Point spread function, resolution, penetration depth, resistance to out-of-focus light
Three-photon_microscopy
Radius which encloses 50% of the total light of a galaxy
I_{e}} . Airy disk Elliptical galaxy Globular cluster Open cluster Point spread function Sérsic profile "Half-light Radius". Swinburne University. Retrieved
Galaxy_effective_radius
Star system in the constellation Libra
every 20.9 days. Additionally the 2M1510AB source has an elongated point spread function in VLT/SINFONI data. The naming of the brown dwarfs in Calissendorff
2M1510
Enhancement Blind deconvolution: image de-blurring algorithm when point spread function is unknown. Connected-component labeling: find and label disjoint
List_of_algorithms
Phenomenon in offset lithography
the halftone pattern in finer and when the substrate has a wider point spread function. Another factor upon which dot gain depends is the dot's area fraction
Dot_gain
Spherical particle larger than nano particles but smaller than sand particles
microspheres (<200 nanometers) are required to obtain an experimental Point spread function to characterise microscopes and perform image deconvolution Drug
Microparticle
Molecule composed of any two atoms
the spectrum. The spectral resolution depends on the instrument's point spread function. The molecular term symbol is a shorthand expression of the angular
Diatomic_molecule
Orbital scientific instrument
each of the 256 GERB detector/telescope Field of View response or Point Spread Function (PSF, see Matthews (2004) ). This was done using a He-Ne laser computer
Geostationary Earth Radiation Budget
Geostationary_Earth_Radiation_Budget
system in the form of a point spread function (PSF) is used to obtain a better estimate of the object. A point spread function can be either calculated
NeuronStudio
NASA mission to fly by eight asteroids
e2v. Each pixel subtends 5 μrad (1.03 arcseconds) and will have a point-spread function with a FWHM of less than 15 μrad (<3.09 arcseconds). Differences
Lucy_(spacecraft)
Image sharpening technique
"Deconvolution of Hubble Space Telescope Images using Simulated Point Spread Functions" Astronomical Data Analysis Software and Systems I, A.S.P. Conference
Unsharp_masking
Imaging of focal planes within a thick sample
remove blur from the image according to a measured or calculated point spread function. Optical sectioning can be enhanced by the use of clearing agents
Optical_sectioning
Ultrasound technique
leads to cancellation of out-of-phase waveforms, narrowing the point spread function (PSF), and thus increasing spatial resolution. A theoretical model
Functional_ultrasound_imaging
in the focal plane of an ultrasonic transducer with a Gaussian point spread function (PSF) h with a FWHM of 100 μm. The photoacoustic response was determined
Super-resolution photoacoustic imaging
Super-resolution_photoacoustic_imaging
Blurry region in optics
Astigmatism Bokeh Chromatic aberration Focal cloud Orb (optics) Point spread function Zeiss formula Ray 2000, p. 50. Ray 2002, p. 89. J.-A. Beraldin;
Circle_of_confusion
Method of determining a point in 3D space
x (3D point) is dispersed in the lens system of the cameras according to a point spread function. The recovery of the corresponding image point from measurements
Triangulation (computer vision)
Triangulation_(computer_vision)
Gravitational deflection of light
Another major challenge for weak lensing is correction for the point spread function (PSF) due to instrumental and atmospheric effects, which causes
Weak_gravitational_lensing
October 1997. 12 October 2007. [10]. "Point spread function." 28 August 2007. Wikipedia. 7 July 2007. Point spread function. Rarogiewicz, Lu. "Interferometry
Multiple_satellite_imaging
Image processing method
effects: 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
Edge_detection
NASA satellite of the Explorer program
precise measurement of the optical distortion of each lens system. Point spread function effects, such as optical coma, are identified and removed in the
Polarimeter to Unify the Corona and Heliosphere
Polarimeter_to_Unify_the_Corona_and_Heliosphere
gradient focus of magnetic resonance in a smaller volume (smaller point spread function), results in a better spatial resolution. The gradients for MRM
Magnetic_resonance_microscopy
lens and the illumination properties both determine the spatial point spread function (PSF) imparted on the image. The PSF in endoscopes has the greatest
Scanning_fiber_endoscope
Atmospheric distortions of light
London A, 199. Baldwin, J. E.; Warner, P. J.; Mackay, C. D., The point spread function in Lucky Imaging and variations in seeing on short timescales, Astronomy
Astronomical_seeing
Deviation from perfect paraxial optical behavior
Nijboer-Zernike theory). This Extended Nijboer-Zernike theory of point image or 'point-spread function' formation has found applications in general research on
Optical_aberration
Digital image manipulation technique
to match features between them, and their photometric values and point spread functions must be made compatible, either by careful calibration, or by post-processing
Image_subtraction
Type of statistical analysis
volume is described mathematically by the point spread function (or PSF); it is essentially the image of a point source. The PSF is often described as an
Fluorescence correlation spectroscopy
Fluorescence_correlation_spectroscopy
American engineer, educator and researcher
the perceived images is based on filtering the input image with a point-spread function that is derived from psychophysical measurements of the spatial
Jan_P._Allebach
Form of microscopy using an electron beam
typically a Schottky-type or cold field emission gun, and the point spread function of the detector, all measurements conducted in EELS appear convolved
Electron energy loss spectroscopy
Electron_energy_loss_spectroscopy
Concept in physics
without correcting for observational effects, particularly the point spread function. Recall that the lensing Jacobian can be decomposed into shear γ
Gravitational lensing formalism
Gravitational_lensing_formalism
Element of a reflecting telescope which focuses light gathered by the primary mirror
telescope parts and construction Mirror mount Mirror support cell Point spread function Primary mirror Silvering "Observatory: Webb's Mirrors". NASA - James
Secondary_mirror
2022 novel by Iain Reid
little more critical of We Spread. It said the story is "creepy", but not very subtle. Besides Penny, the other characters "function more as props", and speak
We_Spread
POINT SPREAD-FUNCTION
POINT SPREAD-FUNCTION
Girl/Female
Hindu, Indian
Point
Boy/Male
American, British, English
Spear-man
Boy/Male
English
Spear.
Surname or Lastname
English, Scottish, French, and Catalan
English, Scottish, French, and Catalan : topographic name for
someone who lived near a bridge, Middle English, Old French, Catalan
pont (Latin pons, genitive pontis).Catalan : habitational name from any of the numerous places named
with Pont.Dutch : variant of
Pond 2.A Pont from the Lorraine region of France is documented in Quebec City in
1640; Pont appears to be a secondary surname to
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : from the medieval personal name Ponc(h)e, Pons (see Ponce).English (of Norman origin) : habitational name from Ponts in La Manche and Seine-Maritime, Normandy, from Latin pontes ‘bridges’ (see Pont).English (of Norman origin) : nickname for a fop or dandy, from points ‘laces for hose’ (see Pointer 1).
Girl/Female
Hindu, Indian
Drop Point
Girl/Female
Hindu, Indian
Point
Boy/Male
Indian
Point
Surname or Lastname
English
English : topographic name for someone who lived beside a stream, Middle English streme.Americanized form of Swedish Ström or Danish Strøm (see Strom).
Boy/Male
Norse
Point descendant.
Girl/Female
Tamil
Bindushri | பீநà¯à®¤à¯à®·à¯à®°à¯€Â
Point
Bindushri | பீநà¯à®¤à¯à®·à¯à®°à¯€Â
Girl/Female
Norse
Point.
Girl/Female
Indian
Drop, Point
Girl/Female
Assamese, Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Oriya, Sanskrit, Sindhi, Tamil, Telugu
Drop; Point
Girl/Female
Hindu, Indian, Marathi
Point; Intelligent
Girl/Female
Tamil
Bindu Priya | பிஂத௠பà¯à®°à®¿à®¯à®¾Â
Drop, Point
Bindu Priya | பிஂத௠பà¯à®°à®¿à®¯à®¾Â
Surname or Lastname
English and French
English and French : probably an altered form of French Pons, a habitational name from places so named in Bourgogne and Franche-Comté.
Girl/Female
Norse
New point.
Boy/Male
Shakespearean
King Henry IV, Part 1 and 2' Edward Poins, an irregular humorist.
Girl/Female
Norse
Beautiful point.
POINT SPREAD-FUNCTION
POINT SPREAD-FUNCTION
Boy/Male
English Norse
rule with mercy.
Biblical
same as Shelemiah
Girl/Female
Arabic
Helpful; Helpfulness
Boy/Male
Indian, Punjabi, Sikh
Imbued in the Elixir of God
Surname or Lastname
English
English : variant of Bramwell, possibly in some instances of Bramhall.
Boy/Male
Tamil
Girl/Female
Indian, Sanskrit
Having Equal Bliss
Surname or Lastname
English
English : unexplained.
Girl/Female
British, English
Island of Linden Trees
Boy/Male
Arabic, Muslim
The Father of Tahir
POINT SPREAD-FUNCTION
POINT SPREAD-FUNCTION
POINT SPREAD-FUNCTION
POINT SPREAD-FUNCTION
POINT SPREAD-FUNCTION
v. t.
To spread or cover over.
n.
To give a point to; to sharpen; to cut, forge, grind, or file to an acute end; as, to point a dart, or a pencil. Used also figuratively; as, to point a moral.
v. t.
To spread abroad, or different ways; to spread apart; to open; as, the sun dispreads his beams.
v. t.
To diffuse, as emanations or effluvia; to emit; as, odoriferous plants spread their fragrance.
v. t.
To prepare; to set and furnish with provisions; as, to spread a table.
n.
An unlimited expanse of discontinuous points.
imp. & p. p.
of Spread
a.
To spread.
v. t.
To strew; to scatter over a surface; as, to spread manure; to spread lime on the ground.
n.
One of the points of the compass (see Points of the compass, below); also, the difference between two points of the compass; as, to fall off a point.
v. i.
To be propagated from one to another; as, the disease spread into all parts of the city.
n.
Lace wrought the needle; as, point de Venise; Brussels point. See Point lace, below.
n.
A table, as spread or furnished with a meal; hence, an entertainment of food; a feast.
a.
Not read or perused; as, an unread book.
v. t.
To propagate; to cause to affect great numbers; as, to spread a disease.
v. t.
To extend in length and breadth, or in breadth only; to stretch or expand to a broad or broader surface or extent; to open; to unfurl; as, to spread a carpet; to spread a tent or a sail.
v. i.
To be diffused; to spread.
v. i.
To be extended by drawing or beating; as, some metals spread with difficulty.