视频人脸图像的品质检测算法
关键词 人脸图像品质评估 主观评价 客观评价
图像特征 人脸识别准确性Title Title Title Title ： ： ： ： Quality assessment of face images in video
Abstract Abstract Abstract Abstract
Face image quality assessment bases on the traditional quality
assessment.The consistency between subjective evaluation and machine
evaluation of face images is a big problem.At the same time,Performance
of face recognition system is dependent on quality of acquired face
image samples.Poor sample quality is a main reason for matching errors
in face recognition systems,and may be one of the main weaknesses of
some implementations.In this paper, the related work on the face image
quality assessment can be summarized as follows:
(1) .The ISO / IEC CD 19794-5's face image standard is introduced,
as well as the current face image quality assessment algorithms.
(2) .Based on the integration of two algorithms mentioned earlier,
a new face image quality assessment algorithm is raised.The algorithm
takes into account both the facial features and image features, giving
a score of the face images.
(3) .Experiments show that subjective evaluation by this algorithm
matchs well with the human machine evaluation.Also,by selecting the
best face images,improves the accuracy of face recognition systems.
Keywords Face quality assessment, subjective evaluation , objective
evaluation , image features, accuracy of face recognition目 次
1 引言 . 1
1.1 背景 .. 1
1.2 人脸图像品质评估的研究现状 2
1.3 OpenCV 概述 . 3
1.4 本文主要研究工作 .. 3
2 人脸品质评估概述 . 5
2.1 影响人脸图像质量的因素 . 5
2.2 人脸图像品质评估与传统的图像品质评估 7
2.3 人脸图像标准 8
3 人脸品质评估算法 .. 11
3.1 人脸品质评估算法概述 11
3.2 多指标评价方法 . 11
3.2.1 算法 I .. 13
3.2.2 算法 II 17
3.2.3 算法 III . 20
3.3 理想化模型方法 . 21
3.4 改进后的多指标评价算法 23
4 用 C++ 和 OpenCV 实现人脸品质评估算法 . 26
4.1 人脸、眼睛和嘴巴的检测 26
4.1.1 检测人脸 . 26
4.1.2 检测眼睛 27
4.1.3 检测嘴巴 27
4.2 各指标评价的实现 .. 28
4.3 MFC 程序实现 .. 29
5 人脸图像品质评估实验 33
5.1 机器评价与主观评价的契合度 33
5.2 人脸图像品质评估与人脸识别准确性 . 33
结 论 .. 36
致 谢 .. 37
参 考 文 献 . 38
附录 1 部分代码 40
附录 2 “ 机器评价与主观评价的契合度 ” 实验数据 531 1 1 1 引言引言引言引言
1.1 1.1 1.1 1.1 背景背景背景背景
近年来，越来越多的领域需要安全可靠的身份识别，各种人体内在的生物