首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance
In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance
admin
2013-01-28
56
问题
In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces of terror". The company’s share price skyrocketed, as did the stocks of other face-recognition companies, and airports across the globe began installing the software and running trials.
As the results start to come in, however, the gloss (光滑表面) is wearing off. No matter what you might have heard about face-recognition software, Big Brother it ain’t.
The concern was based largely on an independent assessment of face-recognition systems carried out in 2000 in the U. S. by the Department of Defense. These tests found that to catch 90 per cent of suspects at an airport, face-recognition software would have to raise a huge number of false alarms. One in three people would end up being dragged out of the line and that’s assuming everyone looks straight at the camera and makes no effort to disguise himself. Results from the recent airport trials would seem to justify that concern.
Most face-recognition systems use some kind of geometric technique to translate a picture of a face into a set of numbers that capture its characteristics. Once it has identified these boundaries, the software calculates their relative sizes and positions and converts this geometry into what Visionics calls a "faceprint". Feed the software a series of mug-shots (通缉犯), and it’ll calculate their faceprints. Then it can monitor live CCTV images for the faces of known suspects. When it finds a match, it raises an alarm.
Even if the system does manage to capture a face, the problems aren’t over. The trouble is that a suspect’s faceprint taken from live CCTV is unlikely to match the one in the database in every detail. To give themselves the best chance of picking up suspects, operators can set the software so that it doesn’t have to make an exact match before it raises the alarm. But there’s a price to pay: the more potential suspects you pick up, the more false alarms you get. You have to get the balance just right. Despite the disappointing tests, some people insist that face-recognition technology is good enough to put terrorists off. After all the claims and counter-claims, with no one able to discern (洞察) the truth, the industry may soon have to face up to reality.
What is the fatal defect of the system according to the U. S. Department of Defense?
选项
A、Too many false alarms were raised.
B、Everyone should look straight at the camera.
C、Only 90% of suspects at an airport were found.
D、Everyone should not disguise himself.
答案
A
解析
第三段说,试验表明机场要检测出90%的嫌疑犯,由于识别软件的错误率太高,每3个人中就有1个被认错。
转载请注明原文地址:https://kaotiyun.com/show/Gu1O777K
0
考博英语
相关试题推荐
Fastfood,amainstayofAmericaneatingfordecades,mayhavereachedaplateauintheUnitedStatesasthematuringbaby-boom
AdversereviewsintheNewYorkpressmaygreatlychangetheprospectsofanewBroadwayproduction.
Areyoualwayssureyouknowwhatpeoplemeanwhentheytrytodescribetheirfeelingstoyou?Weusebothwordsandgesturesto
Concernwithmoney,andthenmoremoney,inordertobuytheconveniencesandluxuriesofmodernlife,hasbroughtgreatchanges
Montaigne’sholdonhisreadersarisesfrommanycauses.Thereishisfrankandcuriousself-delineation.Thatinterests,becaus
Theunfortunatedeathofthegeniuspoetcaused_____losstothiscountry.
Thefoxreallyexasperatedthemboth.Assoonastheyhadletthefowlsout,intheearlysummermornings,theyhadtotakethei
Punditswhowanttosoundjudiciousarefondofwarmingagainstgeneralizing.Eachcountryisdifferent,theysay,andnoonest
Nanotechnology,accordingtoitsfans,willjump-startanewindustrialrevolutionwithmolecular-sizedstructuresascomplexas
Inmostpeople’smind,growthisassociatedwithprosperity.WejudgehowwelltheeconomyisdoingbythesizeoftheGrossNat
随机试题
清燥救肺汤的君药是
患儿,男,11个月,因呕吐,腹泻3天来院,初步诊断为腹泻伴脱水。考虑该患儿为等渗性脱水,补液治疗首选的液体是()
在特别任务法的培训任务中,委员会或初级董事会是为()提供的。
我国传统文化宣传孔融让梨,表扬他把最好的给兄弟姐妹,最差的留给自己,这种教育的特点是强调自觉。古罗马人不是这样。为了解决军队中出现的严重不公平现象,他们没有找一个榜样来教育人,而是着眼于制度设计。比如两个士兵得到一个面包,按规定其中一个负责切割,另一个人则
大型网络通常使用动态分配IP地址的配置方案,当用户第一次登录网络时广播一个(32)请求包,DHCP服务器以(33)应答包提供可租用的IP地址,然后再经过一次握手确认,用户就获得了可用的IP地址。(33)
Oracle针对Internet/Intranet的产品是
下述程序的输出结果是()。#includevoidmain(){inta[5]:{1,2,3,4,5};int*p=a,**q=&p;printf(“%d”,*(p++));
StudyActivitiesinUniversityInordertohelpcollegeanduniversitystudentsintheprocessoflearning,fourkeystudya
互惠互利
A、Sheclosedherfreeblogservicelastweek.B、Shewasupsetwhenherfavoritesitewasclosed.C、Herwebsiteisstillstronga
最新回复
(
0
)