基于方向滤波器组的激光主动成像图像复原  

Image Restoration in Laser Active Imaging Based on Directional Filters

作　　者：王灿进 孙涛[1] 陈娟[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《中国激光》2014年第8期57-63,共7页Chinese Journal of Lasers

基　　金：吉林省科技发展计划(20126015);长春市科技计划项目(2013270)

摘　　要：动平台激光主动成像系统所成图像被模糊的同时受到多种噪声的污染,传统的复原方法对噪声敏感,难以取得令人满意的结果。为此,提出基于方向滤波器组的激光主动成像图像复原方法,使用不同的方向滤波器组对含噪模糊图像进行滤波,估计模糊核函数。对于每个方向滤波器,计算核函数在垂直滤波器方向的Radon变换。接着使用Radon逆变换得到二维模糊核函数的最终估计。根据模糊核函数,即可复原出无噪清晰图像。搭建激光主动成像系统进行实验,结果表明与近年来一些较好的模糊盲复原方法相比,该方法不仅拥有更好的主观效果,同时在客观评价指标(PSNR)上也有所提高。Since images from laser active imaging system on moving flat are blurred and polluted by kinds of noise,state of the art image deblurring techniques which are sensitive to image noise cannot achieve satisfying results. A new deblurring method for laser active imaging system based on directional filters is proposed. The key observation is applying a group of directional filters to the blurry and noisy image to reduce the noise level and estimate the blur kernel. For each directional filter, compute the Radon transform of the blur kernel along the orthogonal direction of the filter. Then the two-dimensional （2D） blur kernel can be reconstructed by inverse Radon transform. The last step is to restore the sharp image due to the blur kernel. An active imaging system is built up for experiment and the results indicate that compared with state of the art blind image deblurring techniques, the proposed method not only drastically improves the image quality in term of subjective visual, but also remarkably improves the PSNR.

关 键 词：图像处理 激光主动成像 图像盲复原 噪声 RADON变换 方向滤波器 

分 类 号：TN957.52[电子电信—信号与信息处理] TP391[电子电信—信息与通信工程]