具体完成工作如下：首先，对人脸识别技术研究背景和现实意义进行了简单的介绍，并对当今研究现状及应用领域进行概括。

Concrete work done as follows: First, a simple introduction of face recognition technology background and practical significance is presented as well as theoretical overview of the preliminary work.

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根据美国国家标准及技术研究所的数据，面部识别程序通过照片识别人脸的错误率已经从1993年的79%降到了去年的0.29%。

According to the National Institutes of Standards and Technology the proportion of photographs which were wrongly identified by such programmes has declined from 79% in 1993 to just 0.29% last year.

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