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基于逐点补偿方法的动态散射成像

Computational Ghost Imaging Using a Dynamic Scattering Medium by the Point-by-Point Compensation Method

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摘要

计算关联成像(CGI)技术能够穿透静态散射介质成像,但是当散射介质发生缓慢变化时,由于光强受到非线性影响而衰减,每次测量的光强值会发生不同程度的漂移,导致重构图像受到大量噪声的干扰。针对上述情况,提出一种逐点校正测量值的方法,该方法在测量矩阵中加入反射率为1的图案,通过记录使用该图案照明后获得的光强变化得到各时刻的衰减因子,并计算中间时刻的补偿系数,根据补偿系数逐点校正衰减因子变化导致的光强畸变,最后对变换的测量值进行还原计算,重建结果说明该方法能够有效地应对计算关联成像技术穿透动态散射介质的成像问题。

Abstract

Computational ghost imaging (CGI) can easily penetrate a static scattering medium. However, when the scattering medium changes dynamically, the measured light intensity is subject to nonlinear changes caused by the medium; as a result, the light intensity of each measurement exhibits a drift, and the reconstructed image contains lot of noise due to the interference. To improve imaging results penetrating a dynamic scattering medium, this study proposes a method to correct the measured value of each point. In this method, patterns with the reflectivity of 1 are added to a measurement matrix. The attenuation factor is obtained at each time by recording the change of light intensity after projecting the pattern, and the compensation coefficient at the middle time is calculated. According to the compensation coefficient, the light intensity distortion caused by the change of the medium’s attenuation factor is corrected for each point, and finally, the transformed values are restored and calculated. The reconstruction results show that the proposed method can effectively deal with the aforementioned noise problem of the CGI technology encountered while penetrating a dynamic scattering medium.

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中图分类号:O438

DOI:10.3788/LOP57.201106

所属栏目:成像系统

基金项目:国家自然科学基金、安徽省自然科学基金;

收稿日期:2020-02-14

修改稿日期:2020-03-20

网络出版日期:2020-10-01

作者单位    点击查看

胡洋頔:国防科技大学电子对抗学院脉冲激光技术国家重点实验室, 安徽 合肥 230037
程正东:国防科技大学电子对抗学院脉冲激光技术国家重点实验室, 安徽 合肥 230037
梁振宇:国防科技大学电子对抗学院脉冲激光技术国家重点实验室, 安徽 合肥 230037
翟翔:国防科技大学电子对抗学院脉冲激光技术国家重点实验室, 安徽 合肥 230037

联系人作者:胡洋頔(huyangdi2014@163.com)

备注:国家自然科学基金、安徽省自然科学基金;

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引用该论文

Hu Yangdi,Cheng Zhengdong,Liang Zhenyu,Zhai Xiang. Computational Ghost Imaging Using a Dynamic Scattering Medium by the Point-by-Point Compensation Method[J]. Laser & Optoelectronics Progress, 2020, 57(20): 201106

胡洋頔,程正东,梁振宇,翟翔. 基于逐点补偿方法的动态散射成像[J]. 激光与光电子学进展, 2020, 57(20): 201106

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