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
75
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 makes it so hard for the face-recognition systems to work effectively?
选项
A、The computers are not so advanced.
B、The faceprints of the mugshots fed in the computers are never identical with those of real persons.
C、It is very hard for the operators to learn to control the system.
D、People seldom look straight at the camera.
答案
B
解析
文章第五段说,问题是现场摄像机显示的面容很难和计算机资料库中的通缉犯的面容数据完全相符。
转载请注明原文地址:https://kaotiyun.com/show/Lu1O777K
0
考博英语
相关试题推荐
Manypeopleseemtothinkthatsciencefictionistypifiedbythecoversofsomeoftheoldpulpmagazines:theBug-EyedMonster
Malnutritionandtheresultingimpairedgrowthanddevelopmentinchildrenofweaningageindevelopingcountriesresultsnoton
Ifanymanheredoesnotagreewithme,heshould______hisownplanfortm-provingthelivingconditionsofthesepeople.
What,then,doesDruckersuggestarethenewknowledge-basedindustriesonwhicheconomicgrowthwilldepend?Hediscussesthree
Inmostpeople’smind,growthisassociatedwithprosperity.WejudgehowwelltheeconomyisdoingbythesizeoftheGrossNat
BillWinner,asalesmanagerwith10yearsinthemedicalindustry,wantstoshifthiscareerintotheinformationtechnology(I
Itwas3:45inthemorningwhenthevotewasfinallytaken.Aftersixmonthsofarguingandafinal16hoursofhotparliamentar
Itwas3:45inthemorningwhenthevotewasfinallytaken.Aftersixmonthsofarguingandafinal16hoursofhotparliamentar
Itwas3:45inthemorningwhenthevotewasfinallytaken.Aftersixmonthsofarguingandafinal16hoursofhotparliamentar
Amidremarkableprogressoninflationandfiscalreform,Italyheadsinto1998withbrightprospectsforeconomicgrowthandits
随机试题
背景某市政服中心办公大楼工程,基础为人工挖孔桩,地下3层为设备用房和车库,地上20层。裙房4层,檐高27m,报告厅混凝土结构局部层高8m,演艺厅钢结构层高8m。主楼为框架—剪力墙结构,基础埋深12m,地下水位在底板以上2m。裙房采用落地式钢管脚手架。某施
甲、乙签订一份合同,甲付给乙1万元,此前乙已经欠甲1万元。下列情形中,甲、乙的债权可以适用抵销的是()。
关系模型的实体完整性是指()
应激性溃疡的诱因有_______。
患者女,22岁。因气候变化出现咳嗽、咳痰、胸闷、呼气性呼吸困难。查体:双肺布满哮鸣音,桶状胸,发绀明显,诊断为“支气管哮喘”。针对该患者的饮食护理,错误的是()
在自动喷水灭火设施检测工作中,通常会用到移动后有可能影响测试精度的仪器设备,如电子秤、超声波流量计等。为保证检测结果的可靠性,应采取的措施是()。
到2002年我国进口关税的平均税率已降至12%,达到了发展中国家的平均水平,到2005年将下降到5%。()
关于国民经济统计与国民经济核算的关系,以下表述中不正确的是( )。
澳门特别行政区主要景区景点较多,其中()是澳门的新标志和旅游热点。
ForyearswehavebeentalkingaboutaddictiontotheInternet,andthentothemobilephone.ArecentsurveyinUKfoundthat_
最新回复
(
0
)