首页 | 本学科首页   官方微博 | 高级检索  
     检索      

人脸检测中盲解卷积的点传输函数和光学传输函数分析
引用本文:沈壁川,吴艳.人脸检测中盲解卷积的点传输函数和光学传输函数分析[J].光子学报,2014,39(9):1652-1657.
作者姓名:沈壁川  吴艳
作者单位:(重庆邮电大学,重庆 400065)
基金项目:美国先进技术计划项目(2007-1B-4287)资助
摘    要:分析了高速实时人脸检测系统中的光学衍射、离焦和采样效应.通过理论分析,构造了表征光学成像系统空间和频率特性的近似点扩展函数和光学传输函数.在假设这些近似点传输函数已知的基础上,提出了两个盲解卷积滤波器,并且和拉普拉斯算子以及最优聚焦算子的光学传输函数作了对比研究.该系统采用一个马达推动光学镜头来获得高清晰度图像,并在预处理级进行了内插滤波.演示系统在较高的准确率时检测帧率达到15.6 fps,实验结果验证了理论分析.

关 键 词:人脸检测  点传输函数  光学传输函数  衍射  离焦  盲解卷积

Point Spread Function and Optical Transfer Function of Bind Deconvolution in Face Detection
SHEN Bi-chuan,WU Yan.Point Spread Function and Optical Transfer Function of Bind Deconvolution in Face Detection[J].Acta Photonica Sinica,2014,39(9):1652-1657.
Authors:SHEN Bi-chuan  WU Yan
Institution:(Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
Abstract:The optical diffraction,defocus,and sampling effects are investigated in the high speed real-time face detection system.Through the analysis,their point spread function (PSF) and optical transfer function (OTF) are formulated to characterize the optical system in the spatial and frequency domain respectively.With the approximate priory knowledge of their PSF,two integer focus operators are proposed and their OTFs to those of Laplacian and the optimal focus operator are compared.This system utilizes a motorized focusing mechanism to acquire high resolution images and a sinc interpolation at the preprocess stage.The demonstration system reaches 15.6 fps with satisfactory results and validates the theoretical analysis.
Keywords:Face detection  Point spread function  Optical transfer function  Diffraction  Defocus  Blind deconvolution
点击此处可从《光子学报》浏览原始摘要信息
点击此处可从《光子学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号