光学学报, 2012, 32 (8): 0828005, 网络出版: 2012-06-27   

基于哈特曼夏克波前传感器的模糊图像复原方法

Method for Blurred Image Restoration Based on Hartmann-Shack Wavefront Sensor
作者单位
浙江大学现代光学仪器国家重点实验室, 浙江 杭州 310027
摘要
离焦模糊图像的清晰度较低,因此必须对其进行复原。传统方法通常采用圆盘或高斯函数来近似离焦造成的点扩散函数,复原效果不够理想。为此,提出利用哈特曼夏克波前传感器探测离焦波前,根据所得波前计算光学系统的点扩散函数,并采用Richardson-Lucy算法对模糊图像进行复原。搭建了实验用的光学系统,采集了离焦模糊图像以及相应的波前信息,获得了清晰的复原图像,并利用客观图像评价方法对退化图像和复原图像进行了评价,同时与传统方法得到的复原图像进行了比较。实验结果表明,该方法能精确重建点扩散函数,有效提高图像的质量。
Abstract
Since blurred image caused by defocus is of low clarity, image restoration is necessary. For traditional methods, circular disk or Gaussian function is adopted to approximate point spread function (PSF) caused by defocus, and the restored image is not ideal. Therefore, a method using Hartmann-Shack wavefront sensor to detect the wavefront distorted by defocus, calculating the PSF of the optical system with the obtained wavefront, and adopting the Richardson-Lucy algorithm to deblur the degraded image is proposed. An experimental system is built, from which both the blurred image and the corresponding wavefront information are collected. Clear restored images are obtained. Objective image quality assessment methods are used to evaluate the degraded and restored images. In addition, the restored images are also compared with the results obtained by traditional methods. Experimental results show that the proposed method can accurately reconstruct the PSF, and the quality of the image is efficiently improved.
参考文献

[1] B. C. Platt, R. Shack. History and principles of Shack-Hartmann wavefront sensing [J]. J. Refractive Surgery, 2001, 17: S573~S577

[2] J. Primot, G. Rousset, J. C. Fontanella. Deconvolution from wavefront sensing: a new technique for compensating turbulence-degraded images [J]. J. Opt. Soc. Am. A, 1990, 7(9): 1598~1608

[3] 饶长辉, 张学军, 姜文汉. 基于哈特曼夏克波前探测的图像解卷积:室内结果[J]. 光学学报, 2002, 22(7): 789~792

    Rao Changhui, Zhang Xunjun, Jiang Wenhan. Image deconvolution based on Hartmann-Shack wavefront sensing: indoors experimental results [J]. Acta Optica Sincia, 2002, 22(7): 789~792

[4] 陈珂, 赵达. 自适应光学中扩展信标波前探测的研究与实验[J]. 光学技术, 2001, 27(5): 387~390

    Chen Ke, Zhao Da. Study and experiments on extended beacon wavefront detection for adaptive optics [J]. Optical Technique, 2001, 27(5): 387~390

[5] 胡边, 饶长辉. 增量维纳滤波法在波前探测解卷积中的应用[J]. 光学学报, 2004, 24(10): 1305~1309

    Hu Bian, Rao Changhui. The application of increamental wiener filters in image deconvolution of wavefront sensing [J]. Acta Optica Sinica, 2004, 24(10): 1305~1309

[6] C. H. Rao, L. Zhu, X. J. Rao et al.. 37-element solar adaptive optics for 26 cm solar fine structure telescope at Yunnan astronomical observatory[J]. Chin. Opt. Lett., 2010, 8(10): 966~968

[7] J. Z. Liang, B. Grimm, S. Goelz et al.. Objective measurement of the wave aberration of human eye with the use of a Hartmann-Shack wavefront sensor [J]. J. Opt. Soc. Am. A, 1994, 11(6): 1949~1957

[8] J. Z. Liang, D. R. Williams, D. T. Miller. Supermormal vision and high-resolution retinal imaging through adaptive optics[J]. J. Opt. Soc. Am. A, 1997, 14(11): 2884~2892

[9] 张雨东, 姜文汉, 史国华 等. 自适应光学的眼科学应用[J]. 中国科学:G辑, 2007, 37(B10): 68~74

    Zhang Yudong, Jiang Wenhan, Shi Guohua et al.. Application of adaptive optics in ophthalmology[J]. Science in China (Series G), 2007, 37(B10): 68~74

[10] 凌宁, 张雨东, 饶学军 等. 用于活体人眼视网膜观察的自适应光学成像系统[J]. 光学学报, 2004, 24(9): 1153~1158

    Ling Ning, Zhang Yudong, Rao Xuejun et al.. A small adaptive optical imaging system for cells of living human retina [J]. Acta Optica Sinica, 2004, 24(9): 1153~1158

[11] Guohua Shi, Yun Dai, Ling Wang et al.. Adaptive optics optical coherence tomography for retina imaging[J]. Chin. Opt. Lett., 2008, 6(6): 424~425

[12] J. Lu, H. Li, L. Wei et al.. Retina imaging in vivo with the adaptive optics confocal scanning laser ophthalmoscope [C]. SPIE, 2009, 7519: 75191I

[13] 张坤, 洪汉玉, 孙协昌 等. 基于波前测量的图像复原技术综述[J]. 红外与激光工程, 2007, 36(1): 131~134

    Zhang Kun, Hong Hanyu, Sun Xiechang et al.. Survey of image deconvlution from wavefront sensing [J]. Infrared and Laser Engineering, 2007, 36(1): 131~134

[14] M. C. Roggemann, B. M. Welsh. Imaging through turbulence [M]. New York:CRC Press, 1996

[15] W. H. Richardson. Bayesian-based iterative method of image restoration [J]. J. Opt. Soc. Am., 1972, 62(1): 55~59

[16] L. B. Lucy. An iterative technique for the rectification of observed distributions[J]. Astronomical Journal, 1974, 79(6): 745~754

余玉华, 董文德, 徐之海, 冯华君, 李奇. 基于哈特曼夏克波前传感器的模糊图像复原方法[J]. 光学学报, 2012, 32(8): 0828005. Yu Yuhua, Dong Wende, Xu Zhihai, Feng Huajun, Li Qi. Method for Blurred Image Restoration Based on Hartmann-Shack Wavefront Sensor[J]. Acta Optica Sinica, 2012, 32(8): 0828005.

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