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In optics, smear is used to refer to motion that has low temporal frequency relative to the integration/exposure time. This typically results from a relative
Smear_(optics)
Topics referred to by the same term
of disinformation tactics Smear Campaign (album), an album by Napalm Death Pat Smear, the guitarist and actor Smear (optics), motion that degrades sharpness
Smear
Branch of physics that studies light
Optics is the branch of physics that studies the behaviour, manipulation, and detection of electromagnetic radiation, including its interactions with matter
Optics
is typically differentiated from smear, which has a lower frequency relative to the integration time. Whereas smear refers to a relatively constant rate
Jitter_(optics)
Model of optics describing light as geometric rays
Geometrical optics, or ray optics, is a model of optics that describes light propagation in terms of rays. The ray in geometrical optics is an abstraction
Geometrical_optics
Material that scatters light in optics
In optics, a diffuser (also called a light diffuser or optical diffuser) is any material that diffuses or scatters light in some manner to transmit soft
Diffuser_(optics)
Meteorological phenomenon
from a spectrum, and the colours are less saturated. There is spectral smearing in a rainbow since, for any particular wavelength, there is a distribution
Rainbow
Type of rainbow formed by fog droplets
with a red outer edge and bluish inner edge. The colors fade due to being smeared out by the diffraction effect of the smaller droplets. In many cases, when
Fog_bow
Lines radiating from bright light sources in photographs
eye. While similar in appearance, this is a different effect to "vertical smear" or "blooming" that appears when bright light sources are captured by a
Diffraction_spike
Instrument for measuring variation in light pulse intensity over time
doi:10.1117/12.175863 Chang, Zenghu (2016). Fundamentals of Attosecond Optics. CRC Press. p. 84. ISBN 9781420089387. "MIT's trillion frames per second
Streak_camera
Medical device for investigating body orifices by direct vision
speculum allows a view inside the body; endoscopes, however, tend to have optics while a speculum is intended for direct vision. Vaginal and anal specula
Speculum_(medicine)
Technique for astrophotography
applications of lucky imaging, it was generally assumed that the atmosphere smeared-out or blurred the astronomical images. In that work, the full width at
Lucky_imaging
Device that amplifies an optical signal
1500 nm wavelength. The gain spectrum of the EDFA has several peaks that are smeared by the above broadening mechanisms. The net result is a very broad spectrum
Optical_amplifier
Variation in brightness and the position of stars due to atmospheric refraction
up scintillate or twinkle in Wiktionary, the free dictionary. Adaptive optics Interplanetary scintillation Observational astronomy Twinkle, Twinkle, Little
Twinkling
Quantum optical theoretical system
In quantum optics, the Tavis–Cummings model is a theoretical model to describe an ensemble of identical two-level atoms coupled symmetrically to a single-mode
Tavis–Cummings_model
Type of jaundice
Increased reticulocytes and the presence of schistocytes in the blood smear of the patient observed during CBC indicates hemolysis. If the patient has
Hemolytic_jaundice
Laboratory technique
suited for uses involving live and unstained biological samples, such as a smear from a tissue culture or individual, water-borne, single-celled organisms
Dark-field_microscopy
2026 shooting by US Border Patrol agents
Retrieved January 30, 2026. Gilbert, David (January 25, 2026). "The Instant Smear Campaign Against Border Patrol Shooting Victim Alex Pretti". Wired. Archived
Killing_of_Alex_Pretti
Microscope that uses visible light
low-power microscope with simplified controls and sometimes low-quality optics designed for school use or as a starter instrument for children. Ultramicroscope
Optical_microscope
Delays experienced through a linear time-invariant system
delay to be constant across all frequencies; otherwise there is temporal smearing of the signal. Because group delay is τ g ( ω ) = − d ϕ d ω {\textstyle
Group_delay_and_phase_delay
Optical illusion
explanations of the illusion describe either positive afterimages or motion smear (comparable to motion blur in photography, film and video). Recent theories
Persistence_of_vision
Units for measuring angles
involve very small angles, such as astronomy, optometry, ophthalmology, optics, navigation, land surveying, and marksmanship. To express even smaller angles
Minute_and_second_of_arc
Loss of function of the spleen
capabilities. Howell-Jolly bodies can be identified and quantified using a blood smear or by flow cytometry. A high number of Howell-Jolly bodies is indicative
Autosplenectomy
Digital imaging circuit
and R. Dyck at Fairchild in 1973 to reduce smear and eliminate a mechanical shutter. To further reduce smear from bright light sources, the frame-interline-transfer
Charge-coupled_device
Type of mass spectrometry that uses an inductively coupled plasma to ionize the sample
lipstick smear evidence can provide valuable information on the recent activities of a victim or suspect. Trace elemental analysis of lipstick smears could
Inductively coupled plasma mass spectrometry
Inductively_coupled_plasma_mass_spectrometry
Techniques and methods in signal processing
Indeed, one can think of points in the (spectral) frequency domain as smearing together information from across the entire time domain. While mathematically
Time–frequency_analysis
Camera technology
of sCMOS cameras for detection and localization of single Cy5 molecules, Optics Express, Saumya Saurabh, Suvrajit Maji, and Marcel P. Bruchez, 2012. sCMOS
SCMOS
1973 as a research assistant working on computerized analysis of cervical smear images. He later became scientific director of the Image Analysis Laboratory
Ewert_Bengtsson
American drama television series
who handled the Wolf River depositions, had killed himself following a smear campaign by Eagle News. Alex learns of Bradley and Chip's investigation
The Morning Show (American TV series)
The_Morning_Show_(American_TV_series)
Multi-wavelength imaging method
remains stationary. In such "staring", wavelength scanning systems, spectral smearing can occur if there is movement within the scene, invalidating spectral
Hyperspectral_imaging
Speed of electromagnetic waves
the phase velocity is not the same for all the frequencies of the pulse) smears out over time, a process known as dispersion. Certain materials have an
Speed_of_light
American contemporary folk musician (born 1941)
Research and Education Institute at Stanford University, as "part of a smear campaign" against King. I went to jail for 11 days for disturbing the peace;
Joan_Baez
Study of metals using microscopy
especially with revealing porosity, which silicon carbide paper sometimes "smear" over. After grinding the specimen, polishing is performed. Typically, a
Metallography
Generalization of laser spectroscopy in quantum optics
intrinsic quantum fluctuations that are of central interest in quantum optics. In ordinary laser spectroscopy, one utilizes only the classical aspects
Quantum-optical_spectroscopy
Controlling biological cells with light
Supplement): S107. doi:10.1016/j.neurom.2022.02.125. ISSN 1094-7159. Shusterman R, Smear MC, Koulakov AA, Rinberg D (July 2011). "Precise olfactory responses tile
Optogenetics
2021 attack to stop election certification
June 27, 2024. Sommerfeldt, Chris (January 7, 2021). "Pro-Trump rioters smeared poop in U.S. Capitol hallways during belligerent attack". Daily News. New
January 6 United States Capitol attack
January_6_United_States_Capitol_attack
Component of blood aiding in coagulation
liter. On a stained blood smear, platelets appear as dark purple spots, about 20% of the diameter of red blood cells. The smear reveals size, shape, qualitative
Platelet
American political campaign
in a contest that became famous for its bitter nature and an underground smear campaign run against McCain. McCain won some subsequent primaries, but after
John McCain 2000 presidential campaign
John_McCain_2000_presidential_campaign
Vacuum tube used to display images
generally preferable. The phosphor persistence must be low enough to avoid smearing or ghosting artifacts at high refresh rates. Variations in anode voltage
Cathode_ray_tube
South Korean multinational electronics corporation
by the Taiwanese media. Taiwan later fined Samsung Electronics for the smear campaign. After Russia's 2022 invasion of Ukraine, Samsung's response to
Samsung_Electronics
Buchsbaum color series of 8mm film loops (4m each) July 6, 1964 titles: Blood Smear Preparation / Crossing Drosophila / Drosophila Medium Preparation / Handling
List of Encyclopædia Britannica Films titles
List_of_Encyclopædia_Britannica_Films_titles
2008 studio album by Meshuggah
peace of mind through obscenity. Additionally, each of the three blood-smeared hands poses in the shape of the number six, which is meant to symbolize
ObZen
Integral expressing the amount of overlap of one function as it is shifted over another
edge detection and related processes (see Kernel (image processing)) In optics, an out-of-focus photograph is a convolution of the sharp image with a lens
Convolution
Device that projects a transparent image
focusing must be readjusted for a sharp image. However, the condensing optics (Fresnel lens) is optimized for one particular vertical position of the
Overhead_projector
Overview article
been expanded into a window by the same dispersion that would otherwise smear the entire image. Horizontal parallax information is preserved but movement
Physics_of_optical_holography
Lens flaw
method, such as stretching a nylon stocking over the front of the lens, or smearing petroleum jelly on a clear filter or on the front element or even the back
Soft_focus
Camera model
Digilux 1 was developed jointly with Panasonic; Leica is responsible for optics, while Panasonic designs the camera electronics. According to Leica, this
Leica_Digilux_1
Mineral discovered in 1998 from the La Fossa crater
energy dispersive spectroscopy due to the small sample size of 100 μm smeared on a 30 nm thick film of carbon. The chemical formula obtained from this
Lucabindiite
the pros and cons of both thick and thin smears taken into consideration, it is imperative to utilize both smears while attempting to make a definitive diagnosis
Diagnosis_of_malaria
English scientist, surgeon and antiseptic pioneer (1827–1912)
focus on the scientific case, but blamed Nunnely for what they considered a smear campaign. Nunnely then found support in James Morton, a Glasgow surgeon
Joseph_Lister
fake videos purporting to be Hamas and was consistent with the Russian smear campaign previously identified by Microsoft. On 24 July, French authorities
Concerns and controversies at the 2024 Summer Olympics
Concerns_and_controversies_at_the_2024_Summer_Olympics
Moon of Neptune
well. In 2002–03 the Keck telescope observed the system using adaptive optics and detected easily the largest four inner satellites. Thalassa was found
Naiad_(moon)
Photography genre
allow accurate measurement of the film speed and in the case of streak or smear images, velocity measurement of the subject. These pulses are usually cycled
High-speed_photography
Signal processing algorithm
suppresses cross-components, at the expense of smearing the distribution in time and frequency. This smearing causes the distribution to be non-zero in regions
Reassignment_method
2014 American science documentary television series presented by Neil deGrasse Tyson
narrative. The Catholic League was upset over their claim that the science show smears Catholicism. A spokesman for the League noted how the show focused on Giordano
Cosmos:_A_Spacetime_Odyssey
Concept in optics
In optics, polarization mixing refers to changes in the relative strengths of the Stokes parameters caused by reflection or scattering—see vector radiative
Polarization_mixing
US surveillance industry research group
video surveillance manufacturers. In March 2021, the Journal of Biomedical Optics published a study by five IPVM researchers and a U.S. military medical service
IPVM
Effect in quantum electrodynamics
cause the electron to execute rapid oscillatory motions. The electron is "smeared out" and each radius value is changed from r to r + δr (a small but finite
Lamb_shift
Powdered-pigment-based art medium
charcoal or pastel particles on a painting or drawing. It cannot prevent smearing entirely without dulling and darkening the bright and fresh colors of pastels
Pastel
Display that uses the light-modulating properties of liquid crystals
rate. But a lower refresh rate can mean visual artefacts like ghosting or smearing, especially with fast moving images. Individual pixel response time is
Liquid-crystal_display
Process of refining or protecting a wooden surface
interfere with wood finishing include dents, gouges, splits, and glue spots and smears. These defects should also be removed before finishing; otherwise, they
Wood_finishing
Physics experiment
this experimental setup, measurements on the lower path always show a smeared out pattern on the raw data. Seeing an interference pattern is only possible
Quantum_eraser_experiment
Indian inventions
IPA: [tʃãːpoː]) is the imperative of cā̃pnā (चाँपना IPA: [tʃãːpnaː]), "to smear, knead the muscles, massage the head and hair" Douglas Harper. "Online Etymology
List of Indian inventions and discoveries
List_of_Indian_inventions_and_discoveries
Measure of the electric polarizability of a dielectric material
v(E); φ is a broadening function, representing the role of scattering in smearing out the energy levels. In general, the broadening is intermediate between
Permittivity
2000 shooting of a child in the Gaza Strip
Kuperwasser report. Several commentators regard it as a conspiracy theory and smear campaign. Several commentators questioned what time the shooting occurred;
Killing_of_Muhammad_al-Durrah
American politician (born 1963)
spokesperson for the Chinese Embassy in Washington, D.C. called the incident a "smear" and part of a "groundless narrative." The embassy denial included a complaint
Don_Bacon
Device that modulates an analog carrier signal to encode digital information
they use lossy compression which causes images to become pixelated and smeared. ISPs employing this approach often advertised it as "accelerated dial-up"
Modem
Electrostatic digital printing process
policies). Inspired by the Xerox 9700's commercial success, Japanese camera and optics company Canon developed in 1979 the Canon LBP-10, a low-cost desktop laser
Laser_printing
Electric charge per unit length, area or volume
charge of an individual particle is not concentrated at a point but is 'smeared out' in space and acts like a true continuous charge distribution. This
Charge_density
Area of physical and philosophical debate
Schrödinger originally viewed the electron's wave function as its charge density smeared across space, but Max Born reinterpreted the absolute square value of the
Interpretations of quantum mechanics
Interpretations_of_quantum_mechanics
American alt-tech social media service
that he or his shitty site is racist or anti-Semitic as left-wing media smears, despite bounteous evidence suggesting that is exactly what they are". On
Gab_(social_network)
Eyewear for protecting against bright light
their sides, or from above or below, but not so close that the eyelashes smear the lenses. To protect against "stray light" from the sides, the lenses
Sunglasses
American reconnaissance satellites (1959–1972)
1995 [ISBN missing] Smith, F. Dow, "The Design and Engineering of Corona's Optics", in CORONA: Between the Sun and the Earth: The First NRO Reconnaissance
CORONA_(satellite)
Relativistic wave equation in quantum mechanics
{2E({\boldsymbol {p}})}}} . Usually this is done more precisely using smearing. Hermann, A.; Meyenn, K. v.; Weisskopf, V. F., eds. (1979). Wolfgang Pauli
Klein–Gordon_equation
microscope and focuses onto the tissue on the slide. By movement of the laser by optics or the stage the focus follows a trajectory which is predefined by the user
Laser_capture_microdissection
NASA space telescope for exoplanetology (2009–2018)
Data that was stored and downlinked includes science stars, p-mode stars, smear, black level, background and full field-of-view images. The Kepler primary
Kepler_space_telescope
Device used in television cameras
vidicon and similar tubes are prone to image lag, better known as ghosting, smearing, burn-in, comet tails, luma trails and luminance blooming. Image lag is
Video_camera_tube
Radiation scattering technique
weak scatterers. If focusing optics like bent mirrors or bent monochromator crystals or collimating and monochromating optics like multilayers are used,
Small-angle_X-ray_scattering
Defunct Canadian company
pulse through a mask and focusing it on a surface, without any risk of smearing that could otherwise result from existing ink-based processes at the time
Lumonics
Video compression technique, used to efficiently predict and generate video frames
internal resolution is used the delta images mostly fight against the image smearing out. The delta image can also be encoded as wavelets, so that the borders
Motion_compensation
Mathematical structures that allow quantum mechanics to be explained
of an electron should be interpreted as the charge density of an object smeared out over an extended, possibly infinite, volume of space. It was Max Born
Mathematical formulation of quantum mechanics
Mathematical_formulation_of_quantum_mechanics
American politician (born 1949)
far-right groups in Europe. The letter accused King of engaging in antisemitic smearing of the Jewish investor and philanthropist George Soros. It concluded, "Rep
Steve_King
Graphic components of typeface letters
a bolder font by rendering the outline a second time at an offset, or smearing it slightly at a diagonal angle. The base weight differs among typefaces;
Typeface_anatomy
High-energy particle measurement tool
and development, of high precision single-photon detectors and related optics, lay the foundations for the design development and construction of the
Ring-imaging Cherenkov detector
Ring-imaging_Cherenkov_detector
VOC investors who complained that the company account books had been "smeared with bacon" so that they might be "eaten by dogs." The investors demanded
List of Dutch inventions and innovations
List_of_Dutch_inventions_and_innovations
Device for showing motion picture film
rubbing the film against itself, which can cause scratching of the film and smearing of the emulsion that carries the pictures. The disadvantages of the platter
Movie_projector
Scandals of US state executive officials
with Tyson was consensual and the timing of the reports was intended to smear him as he was about to ascend to the governorship. Fairfax also insinuated
2019 Virginia political crisis
2019_Virginia_political_crisis
Scientific methodology
1994), pp. 113–18. Schrödinger's wave mechanics posed an electron's charge smeared across space as a waveform, later reinterpreted as the electron manifesting
Deductive-nomological_model
Overview of and topical guide to cell biology
on the cellular level. The most common use of cytopathology is the Pap smear, used to detect cervical cancer at an early treatable stage. Genetics –
Outline_of_cell_biology
Mid-Cambrian fossils from a deposit in British Columbia, Canada
("toothed riddle") was known from only one specimen, an almost featureless oval smear on a slab, with hints of tiny conical teeth. However, 189 new finds in the
Fossils_of_the_Burgess_Shale
Past and present Cornell University faculty
at Department of Anatomy, Medical College, 1913–?) — inventor of the Pap smear test for cervical cancer Stephen J. Roberts — chairman of the Department
List of Cornell University faculty
List_of_Cornell_University_faculty
3 mi) per pixel. Unfortunately, many of the close-up images were limited by smear as the result of problems with Voyager's internal clock due to the high
Exploration_of_Io
the enzyme catalase, which catalyzes the breakdown of hydrogen peroxide. Smearing a colony sample onto a glass slide and adding a solution of hydrogen peroxide
Diagnostic_microbiology
Quantum analog of probabilistic automata
mixing process that only concatenates transformations onto a state, but also smears the state over time. There is no quantum analog to the push-down automaton
Quantum_finite_automaton
meaningful way, with the result that the initially 'sharp' band structure is 'smeared-out', which reflects the finite lifetime of electronic states in such a
Korringa–Kohn–Rostoker_method
Technique for photographing the interface between the seabed and the overlying water
face to be imaged and the imaging plane. Gaps allow sediments to fall or smear and degrade the scientific value of the sediment profile. Stainless steel
Sediment_Profile_Imagery
By positioning Light tubes strategically, using filters and other light optics means, the SE can again be separated from the BSE and corresponding images
Gaseous_detection_device
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