首页
登录
职称英语
In the wake of 11 September, Visionics, a leading manufacturer, issued a fac
In the wake of 11 September, Visionics, a leading manufacturer, issued a fac
游客
2025-04-21
20
管理
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. [br] 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://tihaiku.com/zcyy/4047071.html
相关试题推荐
Inthewakeof11September,Visionics,aleadingmanufacturer,issuedafac
OnthemorningofSeptember11th,IboardedthetrainfromWashingtonHeight
OnthemorningofSeptember11th,IboardedthetrainfromWashingtonHeight
OnthemorningofSeptember11th,IboardedthetrainfromWashingtonHeight
OnthemorningofSeptember’11th,IboardedthetrainfromWashingtonHeigh
OnthemorningofSeptember’11th,IboardedthetrainfromWashingtonHeigh
OnthemorningofSeptember’11th,IboardedthetrainfromWashingtonHeigh
OnthemorningofSeptember’11th,IboardedthetrainfromWashingtonHeigh
AleadingBritishscholarhasproposedtranslatingShakespeareintocontemporar
【T4】EversincethefinancialtsunamisweptallbeforeitinSeptember2008.
随机试题
Itmaybeoneoftheworld’sgreatshoppingdestinations,butLondon’sRegen
Theydecidedtohavedonewiththisfutileargumenthalfanhourago.Theunderl
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombin
[originaltext]IrunadesignstudioinNewYork.Everysevenyears,Iclose
下列选项中,包含矛盾双方相互转化观点的是( )A.千里之行,始于足下 B
关于赖特的罗伯茨住宅,说法错误的是( )。A.草原风格 B.以壁炉为中心
2008年含山蚕山节被列入第( )批国家级非物质文化遗产名录。A.一 B.二
简述我国幼儿教育理念在教育改革过程中发生了哪些变革。
《中华人民共和国教师法》于l993年l0月31日第八届全国人民代表大会常务委员会
女性月经来潮是由于( )。A.血中的E2水平降低,P水平升高 B.血中的E2
最新回复
(
0
)