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Facial Recognition Software
Triela slowed only when her cyborg senses detected others ahead. She answered their cheerful greetings in Italian or German or French, comparing skin texture and facial construction against blurred images captured on CCTV in the aftermath of bomb atrocities, their acoustic pattern to voices plucked from the airwaves by the AISI.
Hunters in the Dolomites, a Gunslinger Girl fanfic.

Computers are able to search the Omniscient Database and provide details of a suspect based on a photo or video. This process is virtually instantaneous, unless added dramatic tension is called for, in which case extra Techno Babble or more Applied Phlebotinum may be needed. A Viewer-Friendly Interface flashing the photographs in the database at high speed is a must for all Facial Recognition Software. Also, the final result never implicates the wrong individual.

There are millions upon millions of dollars going into making this Truth in Television, and a few early approximations used by nice folks like the US Transportation Security Administration. They have a horrible failure rate even on very good photos, both failing matches and producing false positives. (Always fun with the TSA.) It's considered one of the hardest problems in computer science, and nobody even knows how far off a true solution may be. Nonetheless, nobody ever seems to bat an eye at including this trope in a completely "realistic" show.

This has become a popular crutch on most "procedural drama"-type shows. See also the step that comes before, pressing the Enhance Button. Unlike the Enhance Button, though, which is just nonsense in most cases no matter how good your technology is, incredibly powerful facial recognition software is something that could justifiably exist in futuristic or sci-fi settings.


Examples:

    open/close all folders 

    Comic Books 
  • Vol 2. of the definitive Queen And Country comic book series. The British superspy heroes try their facial recognition software for an evil French lothario (no, really) but it doesn't work. Seems the database wants to match everyone up with the Queen. It's fairly obvious the Queen isn't paid to sleep with rich young women for blackmail purposes.

    Fanfic 
  • Used realistically by various parties in Mass Effect Interregnum, especially regarding the ever-secretive Archangel team. Most of the team is careful to wear hardsuits and helmets when "on business", but a few slip-ups happen. Fortunately, they aren't good enough to get a sure match (especially since Omega's population is huge). They do put some people, such as reluctant recruit Vortash, on the right track, but eventually a far more incriminating piece of evidence turns up when Sidonis is (non-fatally) shot on a mission and Garrus yells his name without thinking.

    Film 
  • Used realistically in Minority Report, where the facial recognition software isn't flawless, and only narrows down the field of who the person might be. The user then chooses from these options who the person looks to be.
  • Facial recognition is used in Serenity after the Maidenhead barfight, where the Operative uses the video footage to get a picture of Mal and compare him to the Alliance's criminal database. In an odd example of no Viewer-Friendly Interface being used, the image of Mal's face pops up almost instantly instead of showing multiple faces flicking past.
    • Justified. By Firefly's end, Mal had earned a higher profile among the Alliance, and the poor shape of his ship meant he had a relatively limited area of operation. If the Operative were using a local database first before indexing the full Alliance database, Mal's probably near the top of the list of "usual suspects", even before throwing in any new technology.
  • G.I. Joe: The Rise of Cobra has the Joes identify the Baroness by running a picture of her face against an image library of every person in the world... a library secretly gathered by surreptitiously copying every digital photograph ever taken. Wait.. who are the bad guys again?
    • Also used in G.I. Joe: Retaliation by the President's security detail, when Lady Jaye attempts to infiltrate a fundraising event.
  • Abused in Déjà Vu. The police use facial recognition software to locate a bag! At least one guy comments that it had never been tried before but yes, it produces an exact match from all the bags people carry around in New Orleans. Although Denzel's character wasn't surprised when he asked if they had FRS and the man casually replied "yeah" considering they have access to... you know... have the US's power grid and a few million dollars (only a few) just to... you know.. look in the past, so they would have experimental facial recognition software as well.
  • In The Dark Knight, Batman tries scanning the Joker's facial structure with such software, but it evidently doesn't prove conclusive.
  • Done hilariously in Fast 5 where special agents run a picture from a stop light camera through a Facial Recognition System. They get a perfect match. On a guy wearing a ski mask.

    Literature 
  • Used in the book The Traveler, with faces being recognized from surveillance cameras in sidewalks, crowded plazas, and even ATM cameras- from someone not using the ATM.
  • Used realistically in The Fear Index as a security measure. So the system only has to recognise the 30 odd people that are allowed into the building. Even then the system only works if your face is clean and you maintain a blank expressionless face.
  • Charles Stross averts the trope realistically in his Rule 34 universe, where cameras and drones are omnipresent, but the difficulty of facial recognition and the sheer amount of data means that facial recognition is still done by people viewing footage.

    Live Action TV 
  • This happens in pretty much every episode of Torchwood. Hand Waved by the application of advanced alien technology and secret government databases.
  • Ditto Bones. The series even has an expert whose main duty is to artistically or holographically recreate faces.
  • Averted in the Babylon 5 episode "Convictions", in which security camera records are manually reviewed by Brother Theo's monks to find someone who was at the scene of each of a series of bombings.
  • After an encounter with an unknown terrorist NCIS had its computers running facial recognition software for several episodes. Even when the plot was completely unrelated you could see the comparisons being run on the monitors in the background - apparently those processes are never minimized. Probably they have to be on screen to work. Maybe it's their screensaver.
  • In Heroes Vol. 4, the Government begins tracking the renegade supers by Face-matching them with the massive Everything Is Online network of surveillance cameras across the country. Apparently, all that's needed to fool it is to remove your glasses and comb your hair.
  • Averted in Castle; the title character expects a "facial recognition database", only to be presented with three big piles of paper photos. But, in later episodes, the CIA does have a magical facial recognition computer, flickering photos and all. That's not the only magic-tech the CIA has at its disposal.
  • An episode of Burn Notice fell somewhere between this trope and reality on facial recognition software. Michael is breaking into a building (surprise surprise) which uses facial recognition software as a security measure-it compares your face to a database photo and lets you in if it likes what it sees. But it's not perfect; Michael foxes the system by...holding up a printed photo of an employee in front of his face. A literal Paper-Thin Disguise.
    • This isn't terribly far off of reality, unfortunately. In a similar vein, MythBusters was once able to open a fingerprint-scanning lock by pressing a photocopy of the proper print against it.
    • Another episode had Madeline and Fiona talk their way into looking at DMV photos. Michael, in a voice-over, mentions that it would be difficult to use facial recognition software on a picture where the person is not looking directly at the camera. Fortunately, DMV photos are taken with this in mind, so they're able to download a fairly small list of suspects.
  • Used constantly on Fringe.
  • On an episode of Criminal Minds, Garcia uses this, plus her standard Omniscient Database, to identify every passenger on a train using grainy security camera footage.
  • Appropriatatly for a series that focuses on surveillance, this features in Person of Interest, mainly as one of the methods employed by the Machine but also used by Finch on occasion.
  • One episode of CSI: Crime Scene Investigation had the team using facial recognition software to find a killer in a casino. But wouldn't you know it? He was one of three identical people (all split from the same embryo and given to different families via in vitro fertilization, taking identical twins to a new level) so they kept getting false positives, despite the computer being utterly perfect. Then they realize that there's a fourth involved! It's the victim's 12-year-old son. The computer makes a completely definitive match despite the fact that the others were in their 30's.

    Video Games 
  • Present in Grand Theft Auto IV, with phone pictures and the police database.
  • In Fallout: New Vegas, The Repcomm uses this to ensure that only employees are present in building. However, you can enlist your own face as Mrs. Miller, which cause robots to let you clear the building.

    Western Animation 
  • Sealab 2021 has a facial recognition security door protecting a soda machine.

    Real Life 
  • Many new computers fitted with a camera will feature a recognition software, whether if it is a Mac or Windows, or even Linuxes.
  • The Xbox Kinect is supposed to feature facial recognition that will automatically log you into your Xbox Live! account if you're in the room. Of course, the database it will be searching will be limited to just a few people, making it much easier.
  • Las Vegas casinos in Real Life use facial recognition technology to identify known card counters and gambling sharks.
  • Some Dell laptops allow you to be logged in via facial recognition instead of typing in a password. However, the face must look at exactly the right angle, with good enough lighting, from the same exact distance, without co-workers standing behind you giving you bunny ears and extra faces, when the wind is blowing in the right direction...
  • Some Smartphones also have the option of facial recognition. At least some of these come with a warning that the phone may unlock for anyone that looks like the owner as well, and advises them to use one of the other unlocking modes.
  • Some models of Lenovo Thinkpad feature something of an inversion: Software that is designed to recognize whether a face is in front of the computer or not. If they don't see anyone for a set period of time, the computer assumes that the owner has left the area and locks itself.
  • Facial recognition over a small database of contacts is accessible enough that Facebook and Google's Picasa does it fairly routinely, sometimes alarmingly on people in the background that you didn't even notice when taking the picture. Same with Apple's iPhoto. However, if a face is not known or recognized with a known person, it will ask you to name the person and it will try to match similar faces. It will also allow you to reject faces that aren't actually the person.

Enhance ButtonForensic PhlebotinumFingerprinting Air
Everything Is an iPod in the FutureFuturistic Tech IndexFantastic Radiation Shielding
Extreme Graphical RepresentationMagical ComputerGoogling the New Acquaintance

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