Acta Optica Sinica, Volume. 32, Issue 8, 828005(2012)
Method for Blurred Image Restoration Based on Hartmann-Shack Wavefront Sensor
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.
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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): 828005
Category: Remote Sensing and Sensors
Received: Feb. 15, 2012
Accepted: --
Published Online: Jun. 27, 2012
The Author Email: Yuhua Yu (yuhua726@163.com)