Meta tags:
Headings (most frequently used words):
external, early, 1990s, software, webcam, contents, history, technology, uses, privacy, concerns, see, also, references, further, reading, links, development, entering, the, mainstream, late, 2000s, 2019, 2020, image, sensor, optics, internal, interface, and, videotelephony, monitoring, astrophotography, laser, beam, profiling,
Text of the page (most frequently used words):
the (203), and (87), #webcam (56), webcams (50), video (47), from (45), with (36), for (36), archived (32), retrieved (29), computer (28), original (27), 2021 (27), are (25), edit (24), can (23), camera (23), may (19), cameras (19), such (19), use (18), image (17), internet (16), software (16), was (14), network (13), resolution (13), history (12), 2020 (12), also (12), used (12), laptop (11), most (11), built (11), available (10), this (10), chat (10), 2015 (10), july (10), has (10), have (10), usb (9), 2012 (9), machine (9), august (9), page (8), wayback (8), communication (8), online (8), conferencing (8), instant (8), 2013 (8), users (8), sensor (8), wikipedia (7), privacy (7), links (7), videotelephony (7), data (7), time (7), optical (7), media (7), other (7), web (7), external (7), 2019 (7), into (7), live (7), been (7), lens (7), one (7), which (7), early (7), view (6), using (6), devices (6), public (6), device (6), hardware (6), port (6), card (6), light (6), over (6), messenger (6), messaging (6), beam (6), 2025 (6), more (6), low (6), see (6), that (6), work (6), not (6), these (6), popular (6), focus (6), still (6), frames (6), support (6), 1990s (6), first (6), toggle (5), mobile (5), commons (5), september (5), articles (5), technology (5), input (5), telecommunications (5), wireless (5), transmission (5), division (5), list (5), free (5), charles (5), information (5), system (5), case (5), videoconferencing (5), via (5), further (5), com (5), services (5), standard (5), people (5), during (5), 1080p (5), apple (5), ibm (5), various (5), however (5), well (5), were (5), ccd (5), color (5), images (5), created (5), operating (5), motioneye (5), per (5), second (5), contents (4), search (4), telecommunication (4), telephone (4), ethernet (4), space (4), streaming (4), phone (4), social (4), science (4), related (4), interface (4), storage (4), sound (4), display (4), monitor (4), december (4), general (4), number (4), issn (4), their (4), bayer (4), optics (4), cambridge (4), university (4), october (4), how (4), covid (4), pixels (4), new (4), program (4), face (4), 860 (4), 1993 (4), design (4), cost (4), high (4), sgi (4), trojan (4), room (4), allow (4), than (4), 000 (4), some (4), many (4), when (4), providing (4), computers (4), record (4), laser (4), pixel (4), commercial (4), they (4), instead (4), newer (4), cmos (4), lenses (4), then (4), videos (4), security (4), popularity (4), being (4), pandemic (4), now (4), mainstream (4), systems (4), laptops (4), uses (4), tools (4), based (4), streams (4), large (4), frame (4), its (4), offering (4), main (4), started (4), late (4), version (4), 1994 (4), hide (4), move (4), sidebar (4), contact (3), about (3), terms (3), wikimedia (3), 2026 (3), containing (3), wikidata (3), all (3), english (3), computing (3), radio (3), switched (3), circuit (3), switching (3), cable (3), pioneers (3), telegraph (3), digital (3), mosfet (3), smartphone (3), audio (3), compression (3), serial (3), firewire (3), controller (3), power (3), memory (3), processing (3), graphics (3), virtual (3), 2011 (3), june (3), doi (3), 2016 (3), 2009 (3), november (3), yahoo (3), mode (3), profiler (3), january (3), 2017 (3), february (3), burglar (3), march (3), charge (3), omegle (3), nature (3), april (3), through (3), best (3), top (3), features (3), home (3), 2010 (3), photos (3), 1996 (3), 6000 (3), pdf (3), indy (3), coffee (3), pot (3), activate (3), without (3), remotely (3), field (3), out (3), access (3), sometimes (3), only (3), possible (3), isight (3), but (3), designed (3), range (3), filter (3), very (3), attached (3), both (3), installed (3), connected (3), recording (3), even (3), had (3), teenagers (3), including (3), real (3), example (3), calling (3), added (3), several (3), microsoft (3), proprietary (3), uvc (3), stream (3), debian (3), run (3), electronics (3), read (3), come (3), small (3), fixed (3), depth (3), 480 (3), resolutions (3), 720p (3), article (3), entering (3), 2000s (3), widespread (3), released (3), subsection (3), languages (2), table (2), code (2), policy (2), text (2), site (2), foundation (2), categories (2), category (2), link (2), potentially (2), dated (2), statements (2), short (2), description (2), different (2), portal (2), north (2), usenet (2), fidonet (2), television (2), lan (2), protocol (2), line (2), fiber (2), thomas (2), henry (2), claude (2), alexander (2), robert (2), oliver (2), gray (2), lee (2), john (2), revolution (2), telegraphy (2), satellite (2), communications (2), age (2), fax (2), broadcasting (2), vga (2), game (2), parallel (2), ieee (2), current (2), flash (2), disk (2), refreshable (2), braille (2), output (2), chip (2), keyboard (2), pointing (2), components (2), voice (2), electronic (2), 1995 (2), individual (2), eye (2), gale (2), 290 (2), human (2), reading (2), guardian (2), 978 (2), isbn (2), near (2), infrared (2), 2004 (2), 120 (2), moon (2), russia (2), election (2), bbc (2), news (2), bald (2), old (2), 4chan (2), child (2), porn (2), magazine (2), girl (2), 1599382 (2), wildlife (2), help (2), tourism (2), travel (2), connecting (2), much (2), cnet (2), turn (2), your (2), macbook (2), finally (2), within (2), big (2), verge (2), working (2), become (2), find (2), msn (2), broadband (2), 2022 (2), allows (2), private (2), seen (2), millions (2), www (2), thinkpad (2), series (2), 850 (2), notebook (2), model (2), world (2), vol (2), oldest (2), off (2), references (2), person (2), owner (2), watch (2), vision (2), camfecting (2), infecting (2), cam (2), covers (2), company (2), reported (2), any (2), just (2), include (2), depending (2), malware (2), rather (2), user (2), hackers (2), concern (2), programs (2), concerns (2), after (2), removed (2), depends (2), size (2), four (2), black (2), white (2), each (2), single (2), profiling (2), few (2), models (2), manual (2), array (2), taken (2), seconds (2), astrophotography (2), stations (2), places (2), offices (2), recordings (2), mailed (2), enabling (2), picture (2), mounted (2), building (2), monitoring (2), among (2), frequently (2), personal (2), offered (2), ease (2), caused (2), websites (2), content (2), usage (2), businesses (2), since (2), due (2), remote (2), call (2), quality (2), automatic (2), lighting (2), increasing (2), pictures (2), mac (2), windows (2), handle (2), could (2), gstreamer (2), multiple (2), host (2), either (2), raspbian (2), set (2), supported (2), point (2), interfaces (2), need (2), feature (2), make (2), continuously (2), internal (2), less (2), horizontal (2), fov (2), rooms (2), fields (2), simple (2), consumer (2), greater (2), speeds (2), gradually (2), 320 (2), 240 (2), 640 (2), 1280 (2), aka (2), end (2), sensors (2), price (2), capable (2), produce (2), shortage (2), before (2), made (2), smartphones (2), same (2), option (2), 100 (2), became (2), three (2), dimensional (2), manufacturers (2), directly (2), years (2), clients (2), allowing (2), 2003 (2), widely (2), sites (2), launched (2), later (2), quickcam (2), connectix (2), department (2), shades (2), cpu (2), development (2), primarily (2), appearance (2), upload (2), file (2), changes (2), norsk (2), bahasa (2), log (2), create (2), account (2), donate (2), menu (2), add, topic, cookie, statement, statistics, developers, conduct, legal, safety, contacts, disclaimers, under, additional, apply, you, agree, registered, trademark, non, profit, organization, inc, creative, attribution, sharealike, license, rendered, parsoid, last, edited, utc, hidden, clips, webarchive, template, teleconferencing, film, inventions, https, org, index, php, title, oldid, 1375074147, gnd, authority, control, databases, outline, global, regulation, bodies, oceania, europe, asia, antarctica, americas, south, africa, locations, toasternet, tanet, npl, janet, internet2, cyclades, bitnet, arpanet, notable, networks, wan, uucp, telex, ngn, isdn, cellular, types, equipment, store, forward, concepts, orbital, angular, momentum, polarization, frequency, multiplexing, exchange, terminal, nodes, packet, bandwidth, topology, waves, molecular, optic, coaxial, vladimir, zworykin, wheatstone, watson, alfred, vail, camille, tissot, nikola, tesla, sumner, tainter, sutton, almon, brown, strowger, shannon, johann, philipp, reis, tivadar, puskás, stepanovich, popov, radia, perlman, grafton, jun, ichi, nishizawa, samuel, morse, antonio, meucci, metcalfe, guglielmo, marconi, innocenzo, manzetti, roberto, landell, hedy, lamarr, narinder, singh, kapany, kao, dawon, kahng, bob, kahn, gardiner, greene, hubbard, harold, hopkins, erna, schneider, hoover, hooke, heaviside, elisha, forest, reginald, fessenden, philo, farnsworth, edison, amos, dolbear, daniel, davis, donald, davies, yogen, dalal, chappe, vint, cerf, walter, houser, brattain, bourseul, jagadish, chandra, bose, francis, blake, tim, berners, emile, berliner, graham, bell, bardeen, paul, baran, logie, baird, mohamed, atalla, edwin, howard, armstrong, nasir, ahmed, whistled, language, undersea, cases, teletype, teleprinter, telautograph, smoke, signals, transistor, semiconductor, phryctoria, semaphore, radiotelephone, prepaid, photophone, pager, mass, hydraulic, heliographs, electrical, edholm, law, drums, platform, dct, protection, beacon, 1960s, present, dvi, esata, 1394, obsolete, hdmi, displayport, analog, jack, thunderbolt, ports, expansion, modem, vrm, smps, supply, sshd, nvme, sata, ssd, hdd, bios, ram, motherboard, microprocessor, central, unit, drive, blu, ray, dvd, disc, floppy, pack, removable, speakers, plotter, printer, screen, softcam, microphone, gpu, scanner, trackball, touchscreen, touchpad, stick, trackpad, mouse, pen, tablet, basic, wiki, microblogging, blog, publishing, gaming, talker, relay, synchronous, guestbook, bulletin, board, imageboard, textboard, forum, mailing, email, asynchronous, learning, environment, service, collaborative, discussion, mediated, accessed, ecollection, subscription, mühlbach, lothar, böcker, prussog, telepresence, videocommunications, study, stereoscopy, 305, document, a18253819, 31369406, s2cid, 7642183, pmid, 0018, 7208, 1518, 001872095779064582, factors, yadron, danny, why, everyone, covering, leon, berkeley, heights, enslow, publishers, 0766033764, crime, solving, cybercrime, notícias, jogador, esquece, ligada, transmite, sexo, namorada, langer, lasers, engineering, 571, 575, cignoli, iuliis, zizak, probe, appl, spectrosc, 1372, gerald, 2007, 2nd, 772458173, oclc, 511, 29054, 109, press, observing, modern, astronomer, guide, wall, street, journal, 2005, 2006, caught, goodin, dan, register, feds, man, posing, year, secretly, taped, teens, smoking, gun, tip, leads, arrest, visitor, charges, poeter, damon, peeper, convicted, rutgers, cyberbullying, jconline, band, teacher, pleads, guilty, omeglegirlschat, problems, girls, bachhuber, owen, roberts, max, 2813, 6780, 3389, famrs, frontiers, amphibian, reptile, livestreaming, connect, secretive, maligned, animals, texas, watching, livestreams, fosters, connections, national, environmental, education, neef, reconnect, jarratt, david, 168, 1467, 3584, 1177, 1467358420963370, 156, hospitality, research, exploration, place, lockdown, alan, gawker, lifehacker, five, jonathan, knoder, ten, reviews, mega, understanding, technical, ebay, enough, picking, wired, dear, please, stop, putting, crummy, macbooks, 2023, macrumors, pro, notch, zoom, bad, problem, 2018, huawei, mechanical, pop, techradar, picks, impossible, prices, skyrocketing, lanxon, nate, minoru, hands, gains, functionality, unveils, 1999, chicago, tribune, conference, burkeman, plug, pulled, website, 820, 2000, kev009, edwards, benj, calls, fantasy, flops, facetime, becoming, workstation, 0013, 4872, 217148786, proquest, speed, comes, spiegel, coffeecam, trail, product, brands, action, process, attempting, hack, permission, called, activated, anything, often, carried, victim, virus, portmanteau, companies, sell, sliding, stickers, retrofit, close, needed, having, sold, 250, items, opaque, material, will, older, thwart, hardwired, indicators, whenever, active, circumvent, indicator, surreptitiously, researchers, demonstrated, led, wish, continuous, exposure, originally, intended, prefer, lost, knowledge, feed, particular, normally, cannot, physically, disabled, hijacked, similar, spyware, horse, malicious, tape, block, spies, viewing, activities, response, linearly, proportional, incoming, therefore, suitable, profiles, usually, lie, consists, equipped, details, although, filters, visible, transparent, below, capability, specific, photograph, night, sky, astronomers, astro, photographers, mostly, contain, comparatively, telescopes, techniques, faint, objects, couple, stacked, together, obtain, respectable, contrast, stitching, announced, would, polling, childcare, centres, shops, areas, activity, russian, presidential, movement, detected, saved, uploaded, publicised, theft, give, police, clear, stolen, cctv, raised, underage, posted, forums, imageboards, cyber, bullying, inexpensive, amateur, professional, pursuits, mainly, women, issues, moderation, criticized, ineffective, sexual, rampant, nude, teenage, schoolteacher, resulted, pornography, camgirling, dating, webcasting, performance, vary, capabilities, processor, encourage, crucial, survival, office, discouraged, schools, individuals, relied, spending, business, meetings, moreover, multiplied, session, retired, reached, worldwide, improved, helped, encroach, traditional, controls, enhancements, retouching, wrinkle, smoothing, vertical, stretch, autofocus, assist, substantial, tracking, skype, voip, aol, establishment, permitting, act, imacs, majority, sessions, surveillance, increasingly, observation, messages, iphones, videoconference, videophones, nest, eagle, wide, employed, take, picmaster, app, complete, comparison, unix, cheese, photo, booth, open, source, another, resides, broadcast, once, onto, raspberry, motioneyeos, afterwards, variant, aug, buster, oldstable, python, versions, according, ccrisan, founder, author, guvcview, typical, marketed, denominated, specification, inter, connectivity, drivers, class, composite, 802, showing, amount, noise, transmit, translates, sonix, suyin, others, typically, transmitted, uncompressed, compressed, supporting, die, save, manufacturing, costs, convenient, microphones, silicon, jpeg, yuv, rgb, realtek, ricoh, contains, separate, represented, huge, amounts, burdening, where, alike, cheap, asic, presets, 360, medium, sized, purposes, market, whole, vicinity, focal, factory, usual, distance, fastened, common, grade, plastic, manually, moved, provision, adjustment, formats, aperture, sufficiently, does, impact, sharpness, great, extent, attach, pcb, mount, evolved, simultaneously, technologies, went, offer, 720, 1920, 1080, despite, impressive, mid, fps, former, dominant, necessarily, outperform, multi, rates, sourced, sony, omnivision, playstation, megapixel, rate, coupled, average, considered, inadequate, consequently, retail, occurred, capping, compared, industry, televisions, period, backlog, developments, result, flaw, too, thin, 7mm, modules, fit, inside, resorting, 5mm, expensive, there, level, demand, backup, replacement, kits, tripods, downloadable, apps, producing, viewers, must, glasses, effect, anaglyph, around, 21st, century, began, desktop, screens, thus, eliminating, came, between, two, unknown, making, following, adding, introduced, 2002, gained, netmeeting, allowed, observe, life, namesake, constantly, vein, reality, overlooking, bridges, squares, accordance, concept, aggregator, thousands, date, location, criteria, brother, jennicam, known, integrated, starting, already, existed, seeme, client, server, entered, marketplace, jon, garber, designer, wanted, overruled, marketing, compatible, quick, provided, 320x240, grayscale, 256, cams, tested, variety, protocols, cdma, tdma, gsm, delta, launch, macintosh, maximum, 768, 576, fast, required, capture, though, slower, require, reduced, vino, buffer, minimal, overhead, dmaing, r4600, pal, ntsc, inputs, indycam, developed, 1991, pointed, initially, local, 2001, final, captured, viewed, homepage, updates, every, update, fogcam, san, francisco, state, displayed, xcoffee, limited, stationary, shots, streamed, integrating, increased, children, attending, school, like, commonly, peripheral, telephony, branded, logitech, encyclopedia, item, projects, printable, download, print, export, switch, legacy, parser, get, shortened, url, cite, permanent, what, here, actions, talk, tiếng, việt, vèneto, oʻzbekcha, ўзбекча, اردو, українська, türkçe, ไทย, తెలుగు, தமிழ், kiswahili, svenska, српски, srpski, shqip, slovenščina, slovenčina, srpskohrvatski, српскохрватски, русский, română, português, پښتو, polski, ਪੰਜਾਬੀ, bokmål, nynorsk, nederlands, melayu, മലയാളം, македонски, олык, марий, latviešu, lietuvių, lombard, коми, 한국어, қазақша, jawa, 日本語, italiano, íslenska, indonesia, հայերեն, magyar, हिन्दी, עברית, wayuunaiki, galego, frysk, français, suomi, فارسی, euskara, eesti, español, esperanto, ελληνικά, deutsch, dansk, čeština, کوردی, català, bosanski, বাংলা, български, беларуская, azərbaycanca, asturianu, العربية, special, pages, recent, community, learn, contribute, random, events, navigation, jump,
Text of the page (random words):
omputer hardware manufacturers began building webcams directly into laptop and desktop screens thus eliminating the need to use an external usb or firewire camera gradually webcams came to be used more for telecommunications or videotelephony between two people or among several people than for offering a view on a web page to an unknown public for less than us 100 in 2012 a three dimensional space webcam became available producing videos and photos in 3d anaglyph image with a resolution up to 1280 480 pixels viewers must use 3d glasses to see the effect of three dimensional images 14 2020 edit with remote work entering the mainstream the built in cameras of average laptops were sometimes considered inadequate consequently during the covid 19 pandemic a shortage of external webcams in retail occurred 15 most laptops before and during the pandemic were made with cameras capping out at 720p recording quality at best compared to the industry standard of 1080p or 4k seen in smartphones and televisions from the same period 16 the backlog on new developments for built in webcams is the result of a design flaw with laptops being too thin to support the 7mm camera modules to fit inside instead resorting to 2 5mm 17 18 also the camera components are more expensive and there has not been a high level of demand for this feature 19 20 smartphones started to be used as a backup option or webcam replacement with kits including lighting and tripods or downloadable apps 21 technology edit image sensor edit main article image sensor charge coupled device ccd image sensor of a webcam image sensors can be cmos or ccd the former being dominant for low cost cameras but ccd cameras do not necessarily outperform cmos based cameras in the low price range most consumer webcams are capable of providing vga resolution video at a frame rate of 30 frames per second many newer devices can produce video in multi megapixel resolutions and a few can run at high frame rates such as the playstation eye which can produce 320 240 video at 120 frames per second 22 most image sensors are sourced from omnivision or sony as webcams evolved simultaneously with display technologies usb interface speeds and broadband internet speeds the resolution went up gradually from 320 240 to 640 480 and some now even offer 1280 720 aka 720p or 1920 1080 aka 1080p resolution 23 24 25 despite the low cost the resolution offered as of 2019 is impressive with now the low end webcams offering resolutions of 720p mid range webcams offering 1080p resolution and high end webcams offering 4k resolution at 60 fps optics edit s mount lens designed to attach to the webcam s pcb various lenses are available the most common in consumer grade webcams being a plastic lens that can be manually moved in and out to focus the camera fixed focus lenses which have no provision for adjustment are also available as a camera system s depth of field is greater for small image formats and is greater for lenses with a large f number small aperture the systems used in webcams have a sufficiently large depth of field that the use of a fixed focus lens does not impact image sharpness to a great extent most models use simple focal free optics fixed focus factory set for the usual distance from the monitor to which it is fastened to the user or manual focus webcams can come with different presets and fields of view individual users can make use of less than 90 horizontal fov for home offices and live streaming webcams with as much as 360 horizontal fov can be used for small to medium sized rooms sometimes even large rooms depending on the users purposes webcams in the market can display the whole room or just the general vicinity internal software edit as the bayer filter is proprietary any webcam contains some built in image processing separate from compression digital video streams are represented by huge amounts of data burdening its transmission from the image sensor where the data is continuously created and storage alike most if not all cheap webcams come with built in asic to do video compression in real time support electronics read the image from the sensor and transmit it to the host computer most webcams come with a controller that translates video over usb from sonix suyin ricoh realtek or others typically each frame is transmitted uncompressed in rgb or yuv or compressed as jpeg some cameras such as mobile phone cameras use a cmos sensor with supporting electronics on die i e the sensor and the support electronics are built on a single silicon chip to save space and manufacturing costs most webcams feature built in microphones to make video calling and videoconferencing more convenient interface and external software edit a picture taken by a webcam in 2010 showing a large amount of noise typical interfaces used by articles marketed as a webcam are usb ethernet and ieee 802 11 denominated as ip camera further interfaces such as e g composite video s video or firewire were also available the usb video device class uvc specification allows inter connectivity of webcams to computers without the need for proprietary device drivers various proprietary as well as free and open source software is available to handle the uvc stream one could use guvcview or gstreamer and gstreamer based software to handle the uvc stream another could use multiple usb cameras attached to the host computer the software resides on and broadcast multiple streams at once over wireless ethernet such as motioneye motioneye can either be installed onto a raspberry pi as motioneyeos or afterwards on raspbian as well motioneye can also be set up on debian raspbian is a variant of debian motioneye v4 1 1 aug 21 can only run on debian 10 buster oldstable and python 2 7 newer versions such as 3 x are not supported at this point of time according to ccrisan founder and author of motioneye various software tools in wide use can be employed to take video and pictures such as picmaster and microsoft s camera app for use with windows operating systems photo booth mac or cheese with unix systems for a more complete list see comparison of webcam software view of a bald eagle nest through a webcam uses edit the most popular use of webcams is the establishment of video links permitting computers to act as videophones or videoconference stations for example apple s isight camera which is built into apple laptops imacs and a majority of iphones can be used for video chat sessions using the messages instant messaging program other popular uses include security surveillance computer vision video broadcasting recording social videos and increasingly virtual tourism 26 and wildlife observation 27 28 29 videotelephony edit further information videotelephony webcams can be added to instant messaging text chat services such as aol instant messenger and voip services such as the now retired skype one to one live video communication over the internet has now reached millions of mainstream pc users worldwide improved video quality has helped webcams encroach on traditional video conferencing systems new features such as automatic lighting controls real time enhancements retouching wrinkle smoothing and vertical stretch automatic face tracking and autofocus assist users by providing substantial ease of use further increasing the popularity of webcams a video call session with use of webcams webcams can also encourage remote work enabling people to work remotely via the internet this usage was crucial to the survival of many businesses during the covid 19 pandemic when in person office work was discouraged businesses schools and individuals have relied on video conferencing instead of spending on business travel for meetings moreover the number of video conferencing cameras and software have multiplied since then due to their popularity webcam features and performance can vary by program computer operating system and also by the computer s processor capabilities video calling support has also been added to several popular instant messaging programs webcams allow for inexpensive real time video chat and webcasting in both amateur and professional pursuits they are frequently used in online dating and for online personal services offered mainly by women when camgirling however the ease of webcam use through the internet for video chat has also caused issues for example moderation system of various video chat websites such as omegle has been criticized as being ineffective with sexual content still rampant 30 in a 2013 case the transmission of nude photos and videos via omegle from a teenage girl to a schoolteacher resulted in a child pornography charge 31 the popularity of webcams among teenagers with internet access has raised concern about the use of webcams for cyber bullying 32 webcam recordings of teenagers including underage teenagers are frequently posted on popular web forums and imageboards such as 4chan 33 34 monitoring edit webcam mounted on a building used as a cctv webcams can be used as security cameras software is available to allow pc connected cameras to watch for movement and sound recording both when they are detected these recordings can then be saved to the computer e mailed or uploaded to the internet in one well publicised case 35 a computer e mailed images of the burglar during the theft of the computer enabling the owner to give police a clear picture of the burglar s face even after the computer had been stolen in december 2011 russia announced that 290 000 webcams would be installed in 90 000 polling stations to monitor the 2012 russian presidential election 36 webcams may be installed at places such as childcare centres offices shops and private areas to monitor security and general activity astrophotography edit an image of the moon created by stitching images from a webcam with very low light capability a few specific models of webcams are very popular to photograph the night sky by astronomers and astro photographers mostly these are manual focus cameras and contain an old ccd array instead of comparatively newer cmos array the lenses of the cameras are removed and then these are attached to telescopes to record images video still or both in newer techniques videos of very faint objects are taken for a couple of seconds and then all the frames of the video are stacked together to obtain a still image of respectable contrast 37 laser beam profiling edit a webcam s ccd response is linearly proportional to the incoming light 38 therefore webcams are suitable to record laser beam profiles after the lens is removed the resolution of a laser beam profiler depends on the pixel size commercial webcams are usually designed to record color images the size of a webcam s color pixel depends on the model and may lie in the range of 5 to 10 μm however a color pixel consists of four black and white pixels each equipped with a color filter for details see bayer filter although these color filters work well in the visible they may be rather transparent in the near infrared by switching a webcam into the bayer mode it is possible to access the information of the single pixels and a resolution below 3 μm was possible 39 privacy concerns edit tape over the built in laptop webcam to block spies from viewing activities many users do not wish the continuous exposure for which webcams were originally intended but rather prefer privacy 40 such privacy is lost when malware allow malicious hackers to activate the webcam without the user s knowledge providing the hackers with a live video and audio feed 41 this is a particular concern on many laptop computers as such cameras normally cannot be physically disabled if hijacked by such a trojan horse program or other similar spyware programs cameras such as apple s older external isight cameras include lens covers to thwart this some webcams have built in hardwired led indicators that light up whenever the camera is active sometimes only in video mode 42 however it is possible depending on the circuit design of a webcam for malware to circumvent the indicator and activate the camera surreptitiously as researchers demonstrated in the case of a macbook s built in camera in 2013 42 various companies sell sliding lens covers and stickers that allow users to retrofit a computer or smartphone to close access to the camera lens as needed 42 one such company reported having sold more than 250 000 such items from 2013 to 2016 42 however any opaque material will work just as well 42 the process of attempting to hack into a person s webcam and activate it without the webcam owner s permission has been called camfecting a portmanteau of cam and infecting the remotely activated webcam can be used to watch anything within the webcam s field of vision camfecting is most often carried out by infecting the victim s computer with a computer virus see also edit action camera camera phone ip camera list of video telecommunication services and product brands trail camera references edit coffeecam archived 2012 03 13 at the wayback machine university of cambridge trojan room coffee pot spiegel online archived from the original on 25 september 2015 retrieved 29 july 2015 world s oldest webcam to be switched off bbc news 20 august 2019 archived from the original on 20 august 2019 retrieved 20 august 2019 low cost high speed sgi indy comes with camera machine design vol 65 no 16 august 13 1993 p 84 proquest 217148786 archived from the original on july 13 2021 retrieved march 5 2021 db july 22 1993 video input becoming workstation standard electronic design vol 41 no 15 p 30 issn 0013 4872 edwards benj history of video calls from fantasy to flops to facetime archived 2011 10 10 at the wayback machine pc world magazine june 17 2010 rs 6000 notebook 860 pdf kev009 com archived pdf from the original on 2021 02 25 retrieved 2020 12 30 us ibm rs 6000 notebook 860 model 860 www 01 ibm com 2000 06 28 archived from the original on 2020 09 19 retrieved 2020 12 30 ibm thinkpad power series 820 and 850 www 01 ibm com 1996 07 09 retrieved 2020 12 30 plug pulled on live website seen by millions archived 2022 08 19 at the wayback machine by oliver burkeman in the guardian january 3 2004 video conference program allows more private face to face time chicago tribune 24 may 1999 archived from the original on 2022 04 21 retrieved 2021 07 03 yahoo instant messenger unveils broadband webcam archived from the original on 2021 07 09 retrieved 2021 07 03 msn messenger gains webcam functionality archived from the original on 2021 07 09 retrieved 2021 07 03 lanxon nate july 16 2009 3d photos minoru 3d webcam hands on cnet archived from the original on 2010 12 05 webcams have become impossible to find and prices are skyrocketing the verge 9 april 2020 archived from the original on 19 may 2021 retrieved 4 may 2021 best webcams 2021 top picks for working from home techradar 5 august 2021 archived from the original on 6 may 2021 retrieved 4 may 2021 h...
|
