基于光学相关的船用星敏感器星图运动模糊复原方法

项目名称： 基于光学相关的船用星敏感器星图运动模糊复原方法

项目编号： No.51509251

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 其他

项目作者： 刘海波

作者单位： 中国人民解放军国防科技大学

项目金额： 20万元

中文摘要： 在海面航行的舰船受风、浪、涌等外力的作用会产生复杂、剧烈的船体摇摆和升沉运动，引起星图运动模糊，进而导致星点定位误差甚至提取失败，是船用星敏感器技术亟待解决的技术难题。针对现有方法难以适应船用星敏感器星图复杂运动模糊实时、高质量复原的技术难题，本项目研究集成运动模糊测量与复原光学加速机制的星敏感器技术，提出基于联合变换光学相关图像平移和旋转测量的星图模糊核函数实时估计方法，建立4f系统实现图像反卷积的星图模糊复原光学相关加速机制，实现星敏感器星图模糊实时测量与复原。光学相关器通过两次透镜的傅里叶变换即可实现图像相关运算，将图像运动测量简化为相关峰位置提取，在现有的电光转换设备下，能达到每秒上千帧的处理速度。此外，利用透镜的二维傅里叶变换实现图像模糊复原的反卷积运算操作，与数字处理器相比，具有光学运算所特有的大带宽、高速度和并行处理能力，具有极高的运算效率。

中文关键词： 姿态测量；星敏感器；星图运动模糊复原；联合变换光学相关器；图像光学反卷积

英文摘要： When voyaging, ships are produced a variety of violent swing and motion caused by the complex sea waves and winds, which will lead to image blurring. The blurring of star image caused by unavoidable ship’s sway motion is a critical issue for star tracker. It will introduce the star centroid acquisition inaccuracy or may even fail. This project proposes an approach for motion debluring of the star image by optical acceleration. In the proposed approach, the point spread function will be reconstructed with the image rotation and translation measurement based on joint transform optical correlator. And then, the blurred image will be deconvolved using the accelerator based on 4-f optical system. It can measure and restore the star image blurred real-timely for star tracker using on ships. Due to its calculation is accomplished by optical lens and only the peak is need to detecting, it can solve a thousand frames per second under nowadays spatial light modulator.Furthermore, as the blurred image restoration is accomplished by optical deconvolution using Fourier transform lens,the proposed approach has the performs well in terms of superwide bandwidth, high speed and parallel processing compared with traditionalmethod of digital image processing.

英文关键词： Attitude measurement;Star tracker;Motion deblurring of star image;Joint transform optical correlator;Optical deconvolution of image